Operator List

Operators: 5910

Operator Count   Operator Count   Operator Count   Operator Count  
261   AMARILLO 5   ASCENT 13   BARRETT 4  
1988 INDEXGEO J.V. 1   AMAX 27   ASHER 2   BARRIER 7  
5-D OPERATING 2   AMBASSADOR 20   ASHFORD 15   BARRY 28  
A & A 3   AMBERTON 4   ASHLAND 32   BARTELS 1  
A & D 1   AMBROSIA MINERALS 1   ASHLEY 1   BARTESSA 1  
A & D EXPL 5   AMCOLE 2   ASHTOLA 6   BARTGIS 1  
A & M 2   AMEND 7   ASPECT 6   BARTH 1  
A & R 2   AMERADA 284   ASPEN 2   BARTHOLOMEW 1  
A & T 15   AMERICAN AUSTRALIAN 1   ASSOCIATED OIL 98   BARTLE 3  
A A A OPERATING 5   AMERICAN COASTAL 4   ASTIN 1   BARTLE & BARTLE 1  
A C R 1   AMERICAN COMETRA 39   ASTRO 4   BARTLETT 2  
A K M 2   AMERICAN DELTA 9   ATAPCO 22   BASA RESOURCES 6  
A M & R 3   AMERICAN DRILLING 7   ATASCA RESOURCES 3   BASELINE O & G 1  
A N R 8   AMERICAN ENERGY 17   ATASCO 10   BASIC EARTH SCIENCE 14  
A O E OPERATORS 2   AMERICAN EXPLORATION 23   ATASCOSA OIL & GAS 1   BASIC ENERGY 4  
A O P 9   AMERICAN FIRST ENERGY 1   ATASCOSA TRUST 1   BASIN 13  
A P D 9   AMERICAN HUNTER 1   ATCHISON 3   BASOM 3  
A P I 2   AMERICAN INTERNATIONAL 19   ATHENS 2   BASS 177  
A R P 1   AMERICAN LIBERTY 36   ATKINS & O'NEIL 5   BASTROP 4  
A W P 15   AMERICAN NATURAL GAS 22   ATKINS MINERALS 2   BATEMAN 9  
A.T.O.P.P. 1   AMERICAN OPERATING 1   ATKINSON 18   BATES 4  
ABACO 12   AMERICAN PETROFINA 136   ATLANTIC 965   BATEX 3  
ABBEVILLE 1   AMERICAN PETROLEUM 1   ATLAS 4   BATON 5  
ABBOTT 10   AMERICAN PLASTI-PLATE 1   ATOKA 1   BATTAILE & KNISELY 1  
ABCO 12   AMERICAN PUBLIC ENERGY 4   ATTEBURY 2   BAUCHMAN 2  
ABEL 35   AMERICAN QUASAR 12   ATWOOD 21   BAUGH 1  
ABER 2   AMERICAN REPUBLIC 33   AUBURN 9   BAUMAN 3  
ABERCROMBIE 100   AMERICAN SHORELINE 54   AUDAS 5   BAXTER 108  
ABERNATHY 1   AMERICAN STANDARD 2   AUGUST 1   BAY CITY DRILLING 11  
ABRAHAM 1   AMERICAN TEXAS 5   AUGUSTA 1   BAY CITY REFINING 4  
ABRAXAS 101   AMERICAN TRADING 18   AULD 20   BAY OIL 9  
ABSHER 3   AMERICO 4   AURORA 19   BAY PRODUCTION 3  
ABSHIER 1   AMERICUS 1   AUSTEX 1   BAY ROCK 78  
AC EXPLORATION 3   AMERITEX 1   AUSTIN 25   BAYNES 10  
ACCO 91   AMES 4   AUSTRA-TEX 7   BAYPORT 4  
ACCUMULATIVE ROYALTY 2   AMEX SYSTEMS 1   AUSTRAL 93   BAYRIDGE 1  
ACHE 1   AMHERST 1   AUTREY 1   BAYSIDE 20  
ACHNING 7   AMIGO 2   AUTUMN 1   BAYSTAR 1  
ACIETEROS 5   AMIGOS 1   AV-TECH 1   BAYTEX OIL 32  
ACME 3   AMINEX USA 1   AVALANCHE 3   BEACH 16  
ACOCK 55   AMINI 1   AVERILL 56   BEACHAM 1  
ACOCK/ANAQUA 36   AMINOIL 28   AVERY 7   BEACON 15  
ACOMA 4   AMISTAD 2   AWOEB 3   BEADLE 1  
ACORN 4   AMMAN & McNAB 2   AXEM 8   BEALL 3  
ADA 72   AMMCO 3   AXIO 2   BEAMAN 5  
ADAIR 2   AMMEX 15   AXIS 1   BEAMON 6  
ADAMS 62   AMMONITE 4   AYERS 5   BEARD 15  
ADCO 3   AMOCO 316   AYERS & SWOPE 1   BEASLEY 1  
ADCOCK 1   AMOY 10   AYRES 13   BEATY 1  
ADDINGTON 3   AMPAK 37   AZALEA 2   BEAUCHAMP 2  
ADELANTE 1   AMPECO 2   AZAR 1   BECHTEL 1  
ADELON 2   AMPHION 1   AZMUTH 1   BECK 15  
ADENA 2   AMPOLEX 1   AZTEC 14   BECKER 32  
ADKINS 1   AMSLER 9   AZUL 6   BECKHAM 2  
ADMIRAL 2   AMUREX 1   B & B 12   BECKMAN 9  
ADOBE 28   ANADARKO 50   B & D 1   BECO 2  
ADRIAN 1   ANAQUA 59   B & E 1   BEDWELL 16  
AEGEAN 7   ANCIENT SEAS 1   B & G 6   BEER 26  
AEGIS 2   ANCIRA 1   B & K 1   BEGEMAN 9  
AEOX-ST 2   ANCON OIL 11   B & L 2   BEHEMOTH 4  
AERO COLOMA 1   ANDERMAN 6   B & M 20   BEHRING 1  
AFROMA 53   ANDERSON 180   B & S 1   BEL OIL 7  
AGCO 4   ANDERSON-PRICHARD 35   B & W 1   BEL-POTA 3  
AGOIL 34   ANDOVER 7   B B L 3   BELAIRE 1  
AGSCO 6   ANDRADE 34   B B M 16   BELCHER 4  
AHERN 20   ANDRAU 4   B D K 113   BELCO 65  
AID 12   ANDRAU-HADA 1   B D PRODUCTION 33   BELGAM 8  
AIKMAN 13   ANDREEN 2   B D R 3   BELL 25  
AKIN 3   ANDRES 2   B G EXPLORATION 1   BELL & DANSFIELL 21  
AKRON 6   ANDRESS 38   B H P 29   BELL, JAY 1  
ALABAMA MINERALS 1   ANDREWS 88   B H P PETROLEUM 1   BELL, KELLY 64  
ALABLANCA 1   ANDRUS 9   B J B 15   BELLOWS 2  
ALADDIN 2   ANGEL LAND 2   B J OIL MANAGEMENT 1   BELLWETHER 3  
ALAMO 43   ANGELINA 3   B M W RESOURCES 2   BELMONT 1  
ALANCO 2   ANGLO PRODUCTION 2   B N P 39   BENEDUM 11  
ALANIZ 5   ANGLO-DUTCH 1   B P AMERICA 14   BENEDUM-TREES 43  
ALASKA STEAMSHIP 129   ANGLO-NATIONAL 2   B P L 1   BENGAIL 3  
ALASKA TEX 3   ANHUR 5   B P PRODUCTION 6   BENGE 1  
ALBRECHT 4   ANISMAN 2   B S E PRODUCTION 5   BENHAM 1  
ALBRIGHT 2   ANKENMAN 4   B T 6   BENNETT 35  
ALCO DRILLING 16   ANN 1   B T A OIL 31   BENNETT, MILLS 154  
ALCO OIL 11   ANSCHUTZ 52   B W A B 1   BENSON 13  
ALCOA 88   ANSELMA 1   B Y S INC. 1   BENTEX 6  
ALCOR 2   ANSTER 1   B-G OPERATING 1   BENTON 1  
ALCORN 16   ANTARA 1   BABB 1   BENTSEN 72  
ALECO 1   ANTARES 28   BACARISSE 1   BENZ 7  
ALEXANDER 8   ANTEX 2   BAGDAD 3   BENZ-STODDARD 5  
ALFORD 6   ANTLER 2   BAGNALL 1   BENZAQUIN 1  
ALGORD 1   APACHE 146   BAHIA 30   BEPCO 2  
ALICE 2   APCO 2   BAILEY 38   BERENERGY 12  
ALICE OIL 1   APEX ENERGY 29   BAINBRIDGE 2   BERG 1  
ALKEK 47   APEX OIL 4   BAKER 23   BERGMAN 37  
ALL AM 5   APEXCO 5   BAKKE 29   BERING 32  
ALLAUN 1   APOLLO 5   BALBOA 2   BERKLEY 2  
ALLBRIGHT 1   APPELL 246   BALD 2   BERKSHIRE 1  
ALLDAY 24   APPLE 1   BALDRIDGE 163   BERLY 1  
ALLEGRO 74   APPLIED THERMAL 2   BALLANFONTE 3   BERNARD 1  
ALLEN 115   APPLING 1   BALLARD 48   BERRY 3  
ALLEN & MORRIS 5   AQUILA 6   BALLENGEE 1   BERTELSON 1  
ALLEN & SHUMATE 5   AQUITAINE 1   BALTIC 20   BERTMAN 1  
ALLERKAMP 10   ARANSAS 9   BAM 2   BEST 1  
ALLIANCE 7   ARAPAHO 1   BAMM 1   BETA 1  
ALLIED DRILLING 6   ARAXAS 3   BAMMERT 1   BETTIS 70  
ALLIED HYDROCARBONS 2   ARCADIA 10   BANCROFT 2   BEVERS 1  
ALLIED OIL 2   ARCHER 6   BANDER 1   BEVLY 31  
ALLIED PRODUCTION 10   ARCO 355   BANDERA 3   BEXCO 20  
ALLISON 7   ARENA 20   BANKHEAD 17   BID-RICH 1  
ALLTEX 2   ARENDALE & LOWE 3   BANKLINE 7   BIG 6 DRILLING 47  
ALMAC 8   ARGO 282   BANKS MILLER 3   BIG CHIEF 2  
ALMAR 3   ARGOS 4   BANNER 2   BIG LAKE 5  
ALPHA ENERGY 1   ARGUS 3   BANNON 2   BIG SHELL 4  
ALPHA EXPLORATION 7   ARGYLE 1   BAR D 3   BIG SPRINGS 6  
ALPHA GAS 8   ARICK 1   BAR M 18   BIGHART 2  
ALPHA OIL 2   ARIES 1   BAR MAR 2   BIGHORN 1  
ALPHA OMEGA ENERGY 4   ARK 15   BAR S 1   BIGLANE 2  
ALPHA PRODUCTION 1   ARKANSAS FUEL 252   BAR-MAC 1   BILBO 14  
ALSABROOK 2   ARKLA 7   BAR-MAR 1   BILLFISCH 4  
ALSAN 2   ARLEDGE 12   BARBARA 16   BILLINGS 9  
ALTA 1   ARMADA 4   BARBEE 6   BINNEY 1  
ALTA ENERGY 2   ARMER 1   BARBER 12   BINTLIFF 13  
ALTA MESA 6   ARMOUR 41   BARBRE 1   BIRD 1  
ALTA VISTA 13   ARMOUR-RICHARDS 1   BARGE 1   BIRDWELL 59  
ALTEX 2   ARMSTRONG 100   BARGO ENERGY 2   BISCO 1  
ALTGELT 1   ARMSTRONG & HORN 11   BARIA 18   BISHOP 43  
ALUMINUM CO. OF AMERICA 175   ARMSTRONG & SUTTON 19   BARKER 4   BISKAMP 2  
ALWORTH 1   ARNOLD 26   BARNEBURG 10   BISSELL 1  
ALYANA 1   ARNOLD WELL SERVICE 95   BARNES 20   BISSETT 1  
ALYNDSON 2   ARRIBA 46   BARNETT 4   BITTNER 1  
AM-RDC 1   ARRINGTON 3   BARNHART 8   BLACK 37  
AM-TEX 2   ARROW 34   BARNHILL 7   BLACK GOLD 2  
AMAL 2   ARROWHEAD 2   BARNSDALL 221   BLACK RIVER 4  
AMALGAMATED 7   ARROYO 1   BARNWELL 6   BLACK ROCK 9  
AMAR 5   ARSHT 1   BARON 5   BLACKBRUSH 1  
AMARCO 1   ARTZBERGER 1   BARRACUDA 1    
AMAREX 1   ASAMERA 10   BARRANCA 1    
Operator Count   Operator Count   Operator Count   Operator Count  
BLACKFOOT 1   BRINKERHOFF 8   CAGE 8   CHAMPION 3  
BLACKJACK 7   BRINKOETER 3   CAIN 26   CHAMPLIN 386  
BLACKMAR 2   BRISCOE 22   CAL MON 1   CHANCE 3  
BLACKWELL 1   BRISTOL 3   CAL-TEX 3   CHANDLER 2  
BLAFFER 5   BRISTON 1   CALADONIA 1   CHANOCO 29  
BLAIR 25   BRISTOW 15   CALAME 1   CHAPARRAL 27  
BLAIR-VREELAND 193   BRITANCO 1   CALATEXIA 1   CHAPARROSA 27  
BLAIRSVILLE 2   BRITISH AMERICAN 62   CALAWAY 16   CHAPCO 1  
BLAKE ENERGY 9   BRITISH TEXAN 8   CALCO 2   CHAPMAN 139  
BLALOCK 2   BRITTANY 1   CALDWELL 8   CHARLTON 10  
BLANCHARD 21   BROAD OAK 1   CALHOUN 2   CHARO ENERGY 10  
BLANCO 216   BROADHEAD 1   CALIBOGUE 2   CHARRO 35  
BLANKE 1   BROADUS 6   CALIBRI 1   CHARTER 2  
BLANTON 6   BROADWAY 1   CALIFORNIA CO. 12   CHASE 8  
BLAZER 6   BROCATO 9   CALIFORNIA TIME 1   CHASS 25  
BLEAKLEY 14   BROCK 39   CALIFORNIA TIMES 3   CHASTAIN 1  
BLEDSOE 2   BROGAN 2   CALIX 1   CHAVANNE 24  
BLOCK 1   BRONCO 2   CALLAHAN 2   CHENOWETH 1  
BLOCKER 46   BROOKLYN 9   CALLAWAY 18   CHEROKEE 9  
BLOHM 6   BROOKS 5   CALLENDER 2   CHEROSAGE 22  
BLOMGREN 3   BROONER 28   CALLERY 40   CHERRY 7  
BLOUNT 18   BROSECO 13   CALLON 5   CHERRYVILLE 37  
BLUCHER 2   BROWN 358   CALOHAN 11   CHESAPEAKE 65  
BLUCO 14   BROWNING 10   CALPINE 2   CHESNUTT 5  
BLUE JAY 8   BRUMMETT 10   CALVERT 78   CHESSER 1  
BLUE RIDGE 5   BRUNER 57   CAM CORP. 15   CHESSHER 1  
BLUE SKY 23   BRUNNETT 1   CAMBELL 3   CHEVRON 115  
BLUE WATER 3   BRUNO 3   CAMBRIAN 1   CHEYENNE 5  
BLUE WING ENERGY 1   BRUNS 39   CAMBRIDGE 53   CHICAGO 350  
BLUEBONNET 3   BRYAN 15   CAMDEN 33   CHICO OIL 1  
BLUERIDGE 3   BRYANT 40   CAMERINA 3   CHIEF 1  
BLUESTONE 3   BUCHANAN 41   CAMERON 97   CHILDERS 10  
BLUFF 2   BUCK 24   CAMINO 12   CHILDRESS 1  
BLUHAWK 1   BUCKALOO 9   CAMOIL 1   CHILES 76  
BLUMBERG 10   BUCKINGHAM 13   CAMP 114   CHILTIPIN 3  
BLUMENTHAL 2   BUCKLEY 8   CAMPANA 4   CHINN 7  
BLUTCH 2   BUDA 2   CAMPARIA 1   CHIODO 2  
BOB'S SERVICE 1   BUELL 2   CAMPBELL 53   CHIPPEWA 1  
BOCK 6   BUESCHER 3   CAN-AM 1   CHIQUITA 2  
BOCK & ANDERSON 1   BUETTNER 1   CANADIAN NORTHWEST 1   CHISHOLM 1  
BODE 2   BUFFALO 15   CANALES 28   CHIZUM 26  
BOEGENTER 1   BUNN 12   CANKIE 1   CHOATE 2  
BOLDING 2   BUNTE 10   CANNAN, MORRIS 154   CHOCTAW 1  
BOLIN 10   BUNTIN 1   CANNAN-SUBSURFACE 1   CHOICE 27  
BOLING 8   BUR-KAN 1   CANNON 12   CHOYA DRILLING 12  
BOLLER 4   BURCH 21   CANNONBALL 2   CHRISCO 1  
BOLLING 1   BURDEN 1   CANTEX 1   CHRISTIAN 3  
BOLLMAN 1   BURDETTE 1   CANTRELL 1   CHRISTICO 31  
BOLSA 1   BURDITT 2   CANTRO 9   CHRISTIE 116  
BOLTON 2   BURFORD 2   CANUS 169   CHRISTILIN 2  
BOMMER 18   BURK ROYALTY 69   CANUSA 4   CHRISTINA 1  
BONANZA 6   BURKART 1   CAPE 1   CHRISTOPHER 35  
BONAVENTURE 5   BURKE 21   CAPITAL STAR 9   CHUMNEY 1  
BOND, DURBIN 20   BURKHARDT 1   CAPITAN 1   CHURCH 4  
BOND, ROLAND 4   BURKHART 6   CAPITOL 51   CICHOWSKI 6  
BONNER 2   BURLESON 8   CAPITOL RESOURCES 6   CICO 105  
BONOIL 1   BURLINGTON 9   CAPPS 2   CIMAREX 6  
BOONE 3   BURNAM 1   CAPRICORN 1   CIMARRON 45  
BOOTH & HOLMAN 4   BURNELL 7   CAPRINA 5   CINCO 11  
BOOTHE 1   BURNETT 55   CAR-LOID 1   CIRCLE 20  
BOPCO 2   BURNS 217   CARAWAY 5   CIRCLE 7 OIL & GAS 2  
BORDER 51   BURR 8   CARBIDE 2   CIRCLE W 6  
BOREN 3   BURR & CREWS 1   CARBONIT 1   CIRRUS 2  
BORNEFELD 1   BURROW 3   CARDEN 1   CITADEL 2  
BORSODI 4   BURSON 2   CARDOIL 1   CITATION OIL & GAS 12  
BOSS EXPLORATION 2   BURTON 24   CAREY 13   CITEX 1  
BOSTEX 2   BUSBY 4   CARIBBEAN 22   CITIES PROD. 2  
BOSTON 11   BUSCHMAN 2   CARIBOU 4   CITIES SERVICE 422  
BOTTOMS 1   BUSMORE 14   CARL 65   CITY OF JOURDANTON WATER BOARD 1  
BOUNDS 1   BUTCHER 34   CARLANDA 10   CITY PRODUCTS 1  
BOUNTY 20   BUTLER 74   CARLEE 2   CLA-BAR OIL 6  
BOURNE 2   BUTT 8   CARLESS 4   CLAN 1  
BOW 3   BUTTERCUP 1   CARLON 12   CLANTON 3  
BOWDEN 1   BUTTES 37   CARLOS 4   CLARDY 18  
BOWEN 4   BUTTRAM 2   CARLSON 16   CLARDY & BARNETT 1  
BOWLES 22   BUZZINI 14   CARLTON 3   CLARK 247  
BOWLING 2   BYARS 8   CARNES 18   CLARKSON 2  
BOWMAN 4   BYER 1   CAROLINA 2   CLARKWOOD 2  
BOWMAN CATTLE 14   BYRD 11   CAROLINA-TEXAS 2   CLARY 1  
BOYCE 7   BYS INCORPORATED 1   CARPENTER 3   CLAY 7  
BOYD & DURST 3   C & E 170   CARR 227   CLAYTON 5  
BOYD & GALT 1   C & J 1   CARRIE 1   CLEAR FORK 2  
BOYKIN 59   C & K 46   CARRILLO 1   CLEARY 22  
BOYLE 73   C & M 1   CARRIZO 46   CLEGG 14  
BOYSEN 34   C & R 1   CARRL 224   CLEMCO 17  
BRACHMAN 1   C A G 7   CARROLL 1   CLEMENTS 10  
BRACKEN 3   C B & S 43   CARTER 321   CLEVA 2  
BRADBURY 1   C B ENERGY 6   CARTHAY 22   CLEVELAND 8  
BRADCO 19   C B GATHERING 4   CARTTER 1   CLEVENGER 11  
BRADEX 1   C C LEASEHOLD 1   CARTWRIGHT 5   CLIFFS DRILLING 1  
BRADFORD 5   C C M G 1   CASA GRANDE 2   CLIFFWOOD 1  
BRADLEY 1   C C OPERATING 2   CASCADE 3   CLIMAX 3  
BRADSHAW 2   C D CONSULTING 3   CASCO 1   CLINE 6  
BRADSTREET 1   C D E 3   CASE-POMEROY 1   CLINTON 48  
BRADY 4   C D RESOURCES 12   CASEY 4   CLIPPER 1  
BRAHANEY 2   C E T 3   CASH 5   CLOPTON 16  
BRAHMAN 8   C G V 4   CASHCO 17   CLOUD 1  
BRALORNE 1   C H & M 2   CASHION 9   CLOVER 79  
BRAMAN 66   C H F 1   CASKEY 10   CLUCK 3  
BRAMMER 15   C J D 2   CASKIDS 8   CLYMORE 20  
BRANDON 8   C L F 1   CASTLE 4   COALINGA 2  
BRANHAM 15   C M & M 1   CASTLEMAN 1   COAST CO. 18  
BRANN 1   C M & W 1   CATAHOULA 4   COASTAL BEND DRILLING 1  
BRANNON 3   C M C 6   CATARINA 3   COASTAL BEND OIL 17  
BRANSON 1   C M L 1   CATER 2   COASTAL DRILLING & WORKOVER 5  
BRASADA 1   C M OIL 4   CATHY 3   COASTAL ENGINEERING 3  
BRASFIELD 1   C M S 1   CATLETT 90   COASTAL EXPLORATION 2  
BRAUER 6   C N 1   CATTLE LAND 56   COASTAL GULF 1  
BRAUN 21   C N G 15   CAUBLE 11   COASTAL OIL & GAS 296  
BRAVADO 1   C N R 4   CAVALIER 2   COASTAL OIL & LAND 10  
BRAWLEY 1   C P C 73   CAVALLA 14   COASTAL PLAINS 5  
BRAYERS 1   C P C DALE OPERATING 2   CAWTHON 3   COASTAL PRODUCTION 6  
BRAYTON 89   C P X 25   CAYMAN 10   COASTAL REFINERIES 102  
BRAZELL 5   C R A 5   CAYUGA 5   COASTAL STATES 521  
BRAZOS 220   C R B 24   CAZA OPERATING 1   COASTAL TEX 1  
BRAZOS OIL & GAS 19   C R L 1   CE-BETH 3   COASTAL TREND 66  
BREGMAN 2   C R M 2   CEDAR HILL 1   COASTAL WELL SERVICE 1  
BREHM INVESTMENT 1   C S A 9   CELERON 4   COASTLAND 1  
BRELSFORD 2   C S X 2   CELTIC 1   COASTLINE 69  
BRENAN 4   C T OIL & GAS 1   CENERGY 18   COATES 275  
BRENNAN 2   C T R 3   CENIZA 32   COATS 3  
BRENT 2   C X Y ENERGY 3   CENTAUR 3   COBBS 1  
BREUER 34   C-AIR 2   CENTENNIAL 28   COBRA 29  
BREWER 5   C-K RESOURCES 7   CENTEX 3   COCHRAN 40  
BREWSTER 33   C-TECHNOLOGY 2   CENTRAL 34   COCKBURN 62  
BRIAN 1   CABEZA 1   CENTURA 19   COCKRELL 108  
BRIDAS 1   CABILDO 2   CENTURION 2   CODY 98  
BRIDEWELL 31   CABLE 1   CENTURY 73   COE 1  
BRIDGE 55   CABOT 90   CENZIA 1   COFFEE 79  
BRIDGER 7   CABRE 1   CERRO DE PASCO 11   COFFEY 11  
BRIDWELL 473   CACHARA 4   CHABTEX 1   COFFIELD 10  
BRIGGS 2   CACTUS 6   CHALLENGE 5   COFFMAN 25  
BRIGHAM 59   CADDO 124   CHAMBERLAIN 13   COGGINS 1  
BRIGHT 208   CAESAR 2   CHAMBERS 24    
BRILL 10   CAFRE 3   CHAMBLISS 1    
Operator Count   Operator Count   Operator Count   Operator Count  
COGSWELL 1   CRIPPLE CREEK 2   DELCAR 13   DUVAL PRODUCTION 11  
COHEN 5   CROCKET 1   DELEE 2   DYAD 1  
COHO 5   CROCKETT 7   DELFERN 2   DYCO 2  
COKE 1   CRON 24   DELHI 62   DYNAMIC 77  
COKER 1   CROOM 1   DELHI-TAYLOR 130   DYONISIO 1  
COKINOS 1   CROSBY, A. W. 4   DELK 1   E & H 4  
COLBY 2   CROSS TIMBERS 1   DELKER 14   E & L 1  
COLE 62   CROUCH 52   DELLINGER 25   E C C 3  
COLEMAN 2   CROW 7   DELLWOOD 15   E E X 17  
COLETTO CREEK 1   CROWE 1   DELRAY 74   E K O 12  
COLGIN 1   CROWELL 1   DELTA AMERICAN 25   E M J 1  
COLINE OIL 1   CROWN 17   DELTA BRAVO 1   E O G RESOURCES 195  
COLLIER 17   CROWN CENTRAL 110   DELTA DRILLING 7   E P OPERATING 49  
COLLINS 42   CRUDE OIL 1   DELTA EXPLORATION 1   E R I 11  
COLLOM 1   CRUMP 3   DELTA GULF 24   E S B E 1  
COLO 1   CRUTCHER 1   DELTA PETROLEUM 1   E-COR 3  
COLOBRI 2   CRUTCHFIELD 1   DELTA US 1   E-G JOINT VENTURE 6  
COLOGNE 37   CRUX 3   DENALI 5   EADS 20  
COLOMA 56   CRYSTAL 41   DENISON 1   EAGLE 28  
COLONIAL 2   CUATRO 1   DENMAN 6   EAGLEFORD HUNTER RESOURCES 1  
COLONNADE 1   CUDE 21   DENNIS 9   EARTH SCIENCES 6  
COLORADO 57   CUELLAR 11   DENOVO 4   EASON 9  
COLSON 2   CUERO 1   DENTLER 1   EAST SIDE 2  
COLT 2   CULLEN 29   DENTON 1   EAST WEST INVESTMENT 1  
COLTON 30   CULLINAN 5   DENVER AMERICAN 3   EASTERN ENERGY 1  
COLUMBIA 45   CULOCO 1   DEROSSETT 5   EASTERN GAS 12  
COLUMBIAN 3   CULTON 16   DESANA 1   EASTERN OIL 2  
COLUMBUS 38   CULVER 1   DESCO 1   EASTERN STATES 6  
COLVIN 4   CUMEX 2   DEVEX 1   EASTERN TEXAS 3  
COMANCHE 17   CUMMINGS 9   DEVINE 5   EASTERWOOD 21  
COMBINED AMERICA 1   CUMMINS 74   DEVON 50   EATON 7  
COMBINED PRODUCING 1   CUMMINS & WALKER 134   DEVONIAN 3   EBERT 2  
COMBUSTION PRODUCTS 7   CUNNINGHAM 45   DEWALT 3   ECA HOLDINGS 1  
COMCO-CENTURION 1   CURRAN 1   DEWBRE 119   ECHO 1  
COMETRA 22   CURREY 3   DEWITT OIL & GAS 3   ECHOLS 51  
COMMERCE 2   CURRY 6   DIADEM 1   ECKERT 7  
COMMERCIAL 53   CUSACK 1   DIAMEX 8   ECKOLS 2  
COMMONWEALTH 14   CUTBIRTH 17   DIAMOND 42   ECLETO 1  
COMPASS 2   CXY ENERGY 1   DIAMOND HALF 1   EDCO 9  
COMPLETE OIL 4   CYCLOPS 2   DIAMOND SHAMROCK 4   EDDY 35  
COMSTOCK 23   CYPRESS E & P 4   DIASU 3   EDEN OIL 2  
CON-TEX OIL 1   CYPRUS 24   DICE 2   EDGAR 13  
CONCHO 11   CZAR 11   DICK 39   EDGE 123  
CONCORD 13   D & D 9   DICKSON 1   EDGE PETROLEUM 2  
CONDRY 2   D & G 54   DIETERT 3   EDINBURG 1  
CONE 1   D & M 1   DIFFERENTIAL 1   EDISTO 1  
CONES 3   D A R T 3   DILLARD 27   EDMISTON 4  
CONFEDERATE 10   D B O 5   DILLEY 45   EDMONT 1  
CONLEY 3   D C B OIL & GAS 1   DILLON 69   EDWARDS 71  
CONN 1   D D D ENERGY 1   DINERO 126   EGAN 36  
CONNER 1   D D G 31   DINN 1   EHMAN 1  
CONOCO 378   D D OIL 1   DIRKS 104   EI-FEL 1  
CONQUEST 20   D J EXPLORATION 1   DIRNETT 2   EICHER 6  
CONROE 77   D K D 4   DISCORBIS 47   EILAND 1  
CONROY 1   D K G 11   DISCOVERY 24   EKO 1  
CONSERVATIVE OIL 16   D L B 1   DISHMAN 3   EL CAMINO 1  
CONSOLIDATED 131   D M C 1   DIVERSA 12   EL CHORRO 3  
CONSTANTIN 1   D M L 4   DIXEL 15   EL DORADO 26  
CONTINENTAL 1407   D R S 4   DIXIE 19   EL INDIO 1  
CONTINENTAL TREND RESOURCES 14   D S M OIL 2   DIXILYN 2   EL PASO 168  
CONTRACT ENERGY 1   D V OIL 1   DIXON 30   EL REGALO 3  
CONVEST 77   D Y EXPLORATION 4   DOBBINS 3   EL REY PETROLEUM 2  
CONWAY 4   D'UNGER 5   DODGEN 1   EL RIO 1  
COOK 18   DABNEY 1   DOHERTY 1   EL-TEX 3  
COOKE 2   DADE 1   DOLCH 10   ELAM 2  
COOLEY 1   DAHCO 1   DOLPHIN 2   ELAND 1  
COON 13   DAIGEL 1   DOME 1   ELEANOR OIL 1  
COON-MURPHY 1   DAKAMONT 7   DOMESTIC FUELS 1   ELECTROSEIS 2  
COONRAD 5   DAL-LONG 6   DOMINION 84   ELECTROTHERMIC 9  
COOPER 7   DALE 53   DONICO 5   ELF AQUITAINE 4  
COPANO 25   DALECO 24   DONKIN 2   ELINOR OIL 1  
COPETCO 3   DALEX 3   DONZIS 2   ELLEDGE 2  
COQUAT 132   DALLAS 10   DOOLEY 1   ELLIOTT 12  
COQUINA 21   DALPORT 23   DORADO 1   ELLISON 2  
CORAL 12   DAMSON 41   DORAN 49   ELLOCO 1  
CORDA 1   DANCIGER 29   DORCHESTER 33   ELLSTROM 1  
CORDELE 18   DANCO 1   DORFMAN 1   ELLSWORTH 111  
CORDELL 2   DANE 2   DORRANCE 9   ELMAX 1  
CORDER 1   DANIEL 18   DORRIS 3   ELMER 1  
CORDER, KNOX 3   DANIELS 3   DOSS 2   ELMONT 1  
CORE EXPLORATION 3   DANIELSON 6   DOUBLE EAGLE 36   ELMS 3  
CORENERGY 9   DANMOR 1   DOUBLE J 2   ELTOBILT 1  
CORGEY 38   DANOIL 3   DOUBLE PLAY 18   ELWOOD 1  
CORKILL 1   DANREY 5   DOUBLE S 1   ELY 2  
CORLEY 17   DANSFIELL 28   DOUBLE U 30   EMINENT 2  
CORNELIUS 1   DANT 2   DOUGHERTY 109   EMPIRE 5  
CORNELL 3   DANTEX 10   DOUGHTY 45   EMRY 1  
CORNERSTONE 2   DANZIGER 1   DOUGLAS 123   ENCANA 1  
CORNING 7   DARBY 14   DOVRE 2   ENCINO 20  
CORONADO 72   DARCY 3   DOW CHEMICALS 125   ENCINO ENERGY 1  
CORPENING 15   DARNER 11   DOWNEY 1   ENCO EXPLORATION 84  
CORPUS CHRISTI CORPORATION 13   DARROH 2   DOWNING 12   ENCON 5  
CORPUS CHRISTI DRILLING 1   DARSEY 8   DOYLE 5   ENDEAVOR 1  
CORPUS CHRISTI EXPLORATION 5   DASA 13   DOYNO 2   ENDEAVOUR 6  
CORPUS CHRISTI LEASEHOLDS 13   DASBECK 1   DR. MC 1   ENDERLI 1  
CORPUS CHRISTI MANAGEMENT 43   DASH 9   DR. PEPPER BOTTLING CO. 1   ENDICOTT 3  
CORPUS CHRISTI OIL & GAS 180   DASKAM 2   DRAKE 5   ENDREX 4  
CORPUS CHRISTI REFINING 5   DAUBERT 197   DRAPER 14   ENDURING 1  
CORRON 1   DAUBES 2   DREXEL 9   ENDURO 1  
CORRUM 1   DAUCHY 50   DREYFUS 2   ENERCO 4  
CORSICANA 1   DAUGHERTY 7   DRILLCO 3   ENERCORP 2  
CORUM 32   DAUNTLAS 2   DRILLERS ENERGY 37   ENERGETICS 56  
CORY 2   DAVACO 1   DRILLING & EXPLORATION 40   ENERGEX 2  
CORZELIUS 2   DAVENPORT 36   DRILLMAR 1   ENERGO 1  
COSDEN PETROLEUM 28   DAVES 1   DRISCOLL 32   ENERGY 44  
COSEKA 1   DAVIDOR 20   DRIVER 3   ENERGY DEVELOPMENT 86  
COSMO 6   DAVIDSON 15   DRYER 1   ENERGY ENTERPRISES 6  
COSNER 11   DAVIE 1   DUAL 1   ENERGY EQUITY 1  
COSTA 4   DAVIES 1   DUDLEY 1   ENERGY EXPLORATION 1  
COSTILLA 19   DAVIS 376   DUER-WAGNER 2   ENERGY HUNTER 1  
COTTON 104   DAVMOR 1   DUFF 1   ENERGY INTERNATIONAL 4  
COTTONWOOD 33   DAVOIL 1   DUGGER 68   ENERGY INVESTMENTS 6  
COUCH 4   DAWSON 51   DUKE 2   ENERGY PROJECTS 2  
COUGAR 6   DAY 1   DULANEY 124   ENERGY RESERVES GROUP 26  
COWAN 1   DAYVAULT 1   DULCE OIL 3   ENERGY RESOURCES 9  
COWANCO 6   DE SHANE 1   DULUP 17   ENERGY SEARCH 3  
COWELL 1   DEAN 16   DUNBAR 5   ENERGY SOURCES 7  
COX 899   DeARMON 1   DUNCAN 18   ENERGY TREATING 1  
COYLE 10   DEBROW 1   DUNHAM 4   ENERGY UNLIMITED 5  
COYOTE TRUST 1   DECKER 31   DUNHILL 3   ENERQUEST 9  
CRAIG 2   DECLEVA 6   DUNLAP 23   ENEX 2  
CRANFILL 2   DEEP ROCK 34   DUNN 3   ENEXCO 5  
CRAWFORD 18   DEEP SOUTH 6   DUNNAM 2   ENGELKE 93  
CREDO 1   DEERING 1   DUNWOODY 16   ENGEO 83  
CREECH 1   DEETER 20   DUPONT 3   ENGLAND 1  
CREEK OIL 1   DeGRAZIER 2   DUQUESNE 1   ENGLE 1  
CREIGHTON 3   DeGUIRE 8   DURANGO 2   ENGLISH 1  
CRESCENT 30   DEICO 1   DURBIN BOND 9   ENHANCED ENERGY 1  
CRESLENN 6   DEKALB ENERGY 9   DURBIN OIL 2   ENI EXPLORATION 2  
CREST 37   DEL MAR 23   DURHAM 2   ENRE 22  
CREST ENERGY 1   DEL PETROLEUM 6   DURST 8   ENRON 390  
CRESTMONT 1   DELANEY 1   DUTY TOOL 3   ENSCO 1  
CREWS 20   DELANGE 268   DUVACO 1   ENSEARCH 1  
CRICKET 3   DELANO 1   DUVAL COUNTY RANCH CO. 66    
CRIMSON 4   DELAWARE 3   DUVAL OIL 45    
Operator Count   Operator Count   Operator Count   Operator Count  
ENSERCH 54   FINE 1   GABRIEL 2   GLENWAR 2  
ENSIGN 1   FINGER 23   GAEA 1   GLO CO. 1  
ENSOURCE 1   FINLEY 12   GAELIC 2   GLOBAL 8  
ENSTAR 10   FINNEY 4   GAGE 1   GLOBE OPERATING CO. 8  
ENTERPRISE 28   FIRST ARANSAS 1   GAINCO 12   GLOVER 1  
ENTERPRISES 2   FIRST ENERGY 11   GAINES 10   GLYNN-THOMPSON 1  
ENTEX 19   FIRST MATAGORDA 5   GAITHER 11   GO ENERGY 3  
ENTRUST 1   FIRST OIL 1   GALATIA 2   GO OIL 1  
EPPLER 1   FIRST ROCK 7   GALAXY 172   GO-ENERGY 1  
EQUINOX 1   FIRST UNITED 2   GALLAHER 7   GO-ENERGY 3  
EQUITABLE 12   FIRSTRIKE ENERGY 11   GALLO DE CRISTAL 1   GO-TEX 8  
EQUITX 7   FISCHER 79   GALLOWAY 1   GODBOUT 1  
EQUITY 7   FISH 5   GALO ENERGY 6   GODSEY 11  
ERIN SOUTHWEST 1   FISHER 24   GALT 1   GOERNER 1  
ERNEST 5   FISHER-WEBB 25   GALVEZ 1   GOETZ 8  
ERSKINE 22   FITE 1   GAMBLE 6   GOFORTH 2  
ERWIN 1   FITTIPALDO 1   GAMMA RESOURCES 3   GOHLKE 3  
ESCOBA 1   FITZGERALD 9   GAMMETER 1   GOHLKE-BENGE 1  
ESCONDIDO 5   FITZPATRICK 67   GAR 4   GOLDEN 40  
ESENJAY 330   FIVE RESOURCES 6   GAR-FLO 1   GOLDING 3  
ESGEN 2   FLAG-REDFERN 24   GARCIA 1   GOLDKING 244  
ESPADA 4   FLAITZ 59   GARDESCU 1   GOLDMAN 1  
ESPERANZA 6   FLAMINGO 13   GARDNER 36   GOLDRUS 23  
ESTES 2   FLANAGAN 2   GARLAND 2   GOLDSMITH 6  
ESUNAS 5   FLARE 2   GARLITZ 4   GOLDSTON 243  
ESVES 1   FLASKE 1   GARNER 1   GOLDSTRAND 1  
ETHREDGE 2   FLEET 2   GARNETT 6   GOLIAD 34  
ETHYL 13   FLEMING 1   GARR 2   GOLSON 1  
ETOCO 12   FLETCHER 7   GARRETT 8   GOMA 2  
EUBANK 4   FLO-TEX 1   GARRISON 12   GOOD DAY 8  
EUBANKS 3   FLOBOOTS 4   GARVEY 8   GOOD HOPE 147  
EUGENE 9   FLORENCE 3   GARVIN 1   GOODALE 22  
EURA B. OIL 1   FLORIDA 24   GARY 1   GOODELL 4  
EURATEX 2   FLOUR BLUFF 2   GAS 2   GOODHUE 1  
EUREKA 1   FLOURNOY 232   GAS PRODUCING ENTERPRISES 55   GOODRICH 14  
EUROPEAN 20   FLOWERS 23   GAS ROCK 5   GOODWIN 1  
EVANS 56   FLOYD 2   GASAWAY 1   GORDEN 1  
EVCO 7   FLUSS 1   GASOLINE PRODUCTION 126   GORDON 12  
EVERBRIGHT 8   FLY 70   GASPAR RICE 2   GORMAN 330  
EVEREST 100   FLYING DIAMOND 2   GASPER RICE 35   GORUM 6  
EVERGREEN 23   FLYING W 1   GASROCK 3   GOSE 143  
EVERS 1   FLYNN 19   GASTEX 1   GOTTLIEB 2  
EVERSOLE 1   FOHS 13   GASTRANS 6   GOUGER 11  
EWING 4   FOHS & FOHS 1   GATES 2   GOULD 1  
EXCELSIOR 6   FOLWELL 3   GATHINGS 36   GOVERNMENT WELLS 24  
EXETER OIL 17   FONTANA 10   GATO 2   GRABOWSKI 5  
EXP 1   FORAN 3   GAUNTT 3   GRACE 72  
EXPANDO 67   FORBES 2   GAUTREAUX 1   GRACEY 1  
EXPEX 1   FORCE 4 ENERGY 1   GAYLE 1   GRAGG 2  
EXPLORATION 32   FORCENERGY 2   GEDDIE 4   GRAHAM 382  
EXPLORATION DRILLING 1   FORD 121   GEE 1   GRAMAC 1  
EXPLORATION INVESTMENTS 1   FOREE 4   GEER 2   GRAMMAR 1  
EXPLORATION, LTD 1   FORES 1   GEIER-JACKSON 2   GRANDE 13  
EXPLORECO ENERGY 2   FOREST 381   GEISE 3   GRANDIN 1  
EXPLORER 1   FORESTER 5   GEISELMAN 15   GRANITE 4  
EXPORT 10   FORETICH 1   GEISER 54   GRANT 7  
EXPRESS 3   FORGOTSON 1   GEM 8   GRARIDGE 22  
EXPRO 1   FORMAN 2   GEMACA 1   GRASTY 2  
EXSUN 32   FORNEY 244   GEMARMI 3   GRAVIS 59  
EXTEX 1   FORT APACHE 1   GEMINI 9   GRAWARD 1  
EXXETER PETROLEUM 21   FORT BEND 16   GENERAL AMERICAN OIL 18   GRAY 39  
EXXON 2164   FORT WORTH 1   GENERAL ATLANTIC 1   GRAY WOLFE 2  
EZZELL 14   FORTENBERRY 6   GENERAL CRUDE 261   GRAYBURG 6  
F & B ENERGY 2   FORTRESS MINERALS 4   GENERAL PETROLEUM 2   GREAT BASINS 13  
F C D 3   FORTSON 1   GENERAL PROD. 7   GREAT EXPECTATION 2  
F F A 2   FORTUNE 1   GENERAL WELL 3   GREAT LAKES 29  
F G B 2   FOSS 2   GENESIS 137   GREAT NATIONAL 1  
F-W OIL 1   FOSSIL BAY 5   GEO ENERGY 5   GREAT PLAINS 6  
FAGAN 5   FOSSIL EXPLORATION 19   GEO EXPLORATION 3   GREAT SOUTHERN 2  
FAGIN 1   FOSTER 15   GEO FOCUS 1   GREAT SOUTHWEST 1  
FAIN 9   FOUCH 1   GEO NATURAL 2   GREAT SOUTHWESTERN 1  
FAIR 199   FOUNDATION OIL 2   GEO-REEF 2   GREAT STATES 3  
FAIRVIEW 1   FOUNTAIN 8   GEO-SOURCE 1   GREAT TEXAS 5  
FAIRWAY 9   FOUR STAR 1   GEOCHEMICAL 66   GREAT TEXAS CRUDE 24  
FAITH 1   FOUR-B TRUST 31   GEODE 4   GREAT WEST PET. 3  
FALCO 2   FOURTEEN-HUNDRED CORPORATION 1   GEODOMINION PETROLEUM 43   GREAT WESTERN 15  
FALCON 57   FOWELL 1   GEODYNAMICS 72   GREATHOUSE 2  
FALCONE 1   FOWLER 1   GEOGRAPHIC 1   GREBIN 1  
FALLEY 5   FOX 76   GEOLOGICAL RESEARCH 21   GREEHEY 3  
FALLS 1   FOXBOROUGH 1   GEONATURAL RESOURCES 8   GREEN 11  
FALLS CITY 1   FRANCIS 5   GEOPHYSICAL 10   GREENBRIAR 1  
FAMCOR 10   FRANCITAS 13   GEORGE 8   GREENBRIER 59  
FANCHER 3   FRANK 1   GEOSEARCH 5   GREENHILL 5  
FANION 2   FRANKE 2   GEOSOUTHERN 7   GREENWOOD 2  
FANSLER 1   FRANKEL 14   GEOTEK 1   GREER 8  
FANT 1   FRANKFORT 15   GERALD 2   GREGG 50  
FAR 3   FRANKLIN 26   GERKER 1   GRELLING 16  
FAR WEST 3   FRANKS 1   GERMANY 1   GRETA 6  
FARAGSON 1   FRANZ 3   GERNER 1   GREY WOLF 6  
FARENTHOLD 33   FRASER 7   GERODETTI 1   GRIFFIN 5  
FARGASON 6   FRAZER 2   GERONIMO 40   GRIFFITH 7  
FARGO 34   FRAZIER 76   GERTEX 1   GRIMES 13  
FARISH 3   FREDONIA 2   GES 5   GRIMM 6  
FARMERS 1   FREEDMAN 11   GETTY 265   GRISHAM 1  
FARMOR 2   FREEMAN 48   GIBLIN 1   GRISINGER 1  
FARNEY 1   FREEPORT 1   GIBRALTAR 17   GROFF 1  
FARNSWORTH 3   FREER 3   GIBSON 20   GROUP 9  
FARROW 1   FREMONT 10   GIDDENS 1   GROVER 2  
FARSON 1   FRENCH OIL 28   GIDEON 2   GROVER-MCKINNEY 1  
FASELER 1   FRENCH, L.D. 1   GIEBEL 2   GRUBB 48  
FASKEN 8   FRESNO 1   GIERHART 38   GRUBBS 1  
FASSY 1   FRIDAY 5   GIFFORD 8   GRUBSTAKE 1  
FAULK 3   FRIO 115   GILBERT 1   GRUSS 2  
FAYE 1   FRIO-TEX 65   GILBREATH 2   GRUY 18  
FAYETTE COUNTY 4   FROHNHOEFER 8   GILCHRIST 1   GUADALUPE 21  
FEAGIN 3   FRONTIER PETROLEUM 17   GILCREASE 85   GUARANTY 3  
FEAZEL 1   FROST 62   GILGER 12   GUARDIAN 25  
FECH 1   FRYER 1   GILL 30   GUENTHER 2  
FEDERAL INDUSTRIES 1   FULK 2   GILLAND 1   GUERNSEY 20  
FEDERAL OIL 1   FULLER 54   GILLESPIE 39   GUEST 4  
FEDERAL ROYALTY 13   FULLERTON 5   GILLEY 1   GUFFEY 3  
FEE OIL & GAS 1   FULTON 4   GILLIAM 1   GUIBERSON 2  
FEHLHABER 1   FUNDAMENTAL OIL 3   GILLILAND 1   GUILBAULT 1  
FELAND 3   FURNELL 1   GILLOCK 1   GUINN 2  
FELDERHOFF 7   FURSE 1   GILLRING 107   GULF AMERICAN 16  
FELDMAN 20   FUSON 1   GILMORE 1   GULF BOARD OIL 22  
FELMONT 10   FUTCH 1   GILSTER 2   GULF CANADA 4  
FELTNER 5   FUTURE EXPLORATION 10   GINCO 4   GULF COAST 140  
FENDER 8   FUTURE PETROLEUM 4   GINGER 3   GULF ENERGY 93  
FENN 16   G & H 2   GINTHER 168   GULF INTERSTATE 11  
FENNER 1   G & M 3   GISSEL 1   GULF LAKES 1  
FENSTERMAKER 1   G & P 5   GIST 2   GULF MINERALS 37  
FERGUSON 61   G & S 1   GIVENS 1   GULF OIL 711  
FERRIER 4   G A P 5   GLACIER 85   GULF PLAINS 29  
FIDELITY 112   G A S 11   GLASCO 2   GULF PROD. 7  
FIELD 9   G C E A 5   GLASS 1   GULF RESOURCES 3  
FIELD DRILLING 2   G D ENERGY 1   GLASSCOCK 357   GULF SANDS 127  
FIELDS 13   G D K 3   GLASSEL 3   GULF SOUTH 12  
FIFTEEN 2   G E C 3   GLAZIER 1   GULF STATES 52  
FIFTH ANDREWS 1   G H J 4   GLENCO 14   GULF STREAM 12  
FIKES 3   G H R 50   GLENDA 11   GULF TIDE 1  
FILON 12   G L G ENERGY 9   GLENN 22   GULFBOARD 2  
FINA 124   G M T 1   GLENN & ASSOCIATES 5   GULFCO 1  
FINCH 2   G S I 2   GLENNCO 5    
FINDER 1   G W R 2   GLENORA 4    
Operator Count   Operator Count   Operator Count   Operator Count  
GULFPORT 2   HAWKINS 115   HOOKS 2   INTEGRATED OPERATOR 3  
GULFSHORE 18   HAWLEY 76   HOOPER 3   INTER-ALLIED 1  
GULFSIDE 1   HAWN 312   HOOVER 39   INTERCOASTAL 30  
GULFSTAR 22   HAWORTH 2   HOPE 31   INTERCONTINENTAL 3  
GULFSTREAM 25   HAWTHORN 15   HOPE HILL 1   INTERGRATED 1  
GULFTON OIL 1   HAWTHORNE 6   HOPE PRODUCTION 1   INTERNATIONAL 12  
GUM HOLLOW 1   HAYDEN 11   HOPEHILL 7   INTERNATIONAL NUCLEAR 14  
GURLEY 1   HAYES 10   HOPF 1   INTERNATIONAL OIL & GAS 14  
GUTHRIE 3   HAYNES 84   HOPI 3   INTERNATIONAL WESTERN 3  
GUTIERREZ 11   HAYNESWORTH 1   HOPPER 1   INTERSTATE MINERALS 10  
GYPSY 1   HAYPEC 7   HOPSON 10   INTEX 6  
H & H 3   HAYS 20   HORIZON 5   INTRAMERICAN 11  
H & H DEVELOPMENT 1   HAZEL 2   HORMACHEA 1   INTREPID 6  
H & H DRILLING 2   HAZELETT 4   HORN 100   INVESTEX 1  
H & J DRILLING 263   HAZLITT 1   HORNADAY 2   INVESTMENT VENTURES 3  
H & M 4   HEAD 6   HORNBECK 2   INVESTORS NATURAL GAS 1  
H & N 2   HEAD & WELSH 34   HORNBERGER 5   INVESTORS SYNDICATE OF SOUTHWEST 8  
H & R 1   HEADINGTON 57   HORNE 3   INVINCIBLE 1  
H & S 10   HEADWATERS 2   HORNER 2   IOWA-PAYNE 1  
H & W 7   HEARD 27   HORNSBY 1   IRBY 3  
H A J J 7   HEARTLAND 4   HORRIGAN 4   IRENE 4  
H C M 2   HEBERT 5   HORSTING 3   IRISH OIL 8  
H C W 3   HECAR 1   HORTON 2   IRVING 7  
H D & H 4   HEDGE 23   HORVATH MILLS 1   IRWIN 9  
H D C 1   HEDLEY 11   HOSKINS 15   ISBELL 1  
H E & D 1   HEDRICK 5   HOTCHKIN 19   IVEY TERRY 1  
H E A 1   HEEMANN 1   HOU-TEX 16   IVY 3  
H E C I 13   HEEP OIL 167   HOUCHINS 1   J & C 59  
H G I 3   HEID 7   HOUGEN 1   J & D 2  
H L B 1   HEINZE 2   HOUGH 7   J & E 1  
H M C 1   HELDENFELS 14   HOUSE 1   J & J 1  
H M S 5   HELIS 6   HOUSER 27   J & M WELL SERVICE 14  
H N G 188   HELLAND 37   HOUSH 29   J & W OIL 1  
H O R 1   HELMERICH 7   HOUSTON 11   J A H 72  
H P R 1   HELVETIA 2   HOUSTON DOMESTIC 4   J B H 1  
H R B OIL 2   HEMINGWAY 10   HOUSTON DRILLING 4   J B OIL & GAS 1  
H R H 3   HEMPHILL 1   HOUSTON ENERGY 3   J F D 3  
H S RESOURCES 4   HENDERSON 24   HOUSTON EXPLORATION 43   J H 1  
H T H 1   HENDRICKSON 2   HOUSTON GULF 53   J H I 1  
H V DRILLING 1   HENNA 1   HOUSTON INDEPENDENT 1   J I L 5  
H-M OIL 156   HENNIG 4   HOUSTON MINERAL 10   J J 1  
HAAS 205   HENNINGER 1   HOUSTON NATURAL GAS 113   J J R S 1  
HABER 24   HENRY 30   HOUSTON OIL 417   J L RESOURCES 2  
HABERLE 2   HENSCH 2   HOUSTON OIL & MINERALS 128   J M C RESOURCES 2  
HADA 80   HENSHAW 145   HOUSTON OIL FIELDS 6   J M G FINANCIAL 1  
HADEN 2   HENSON 5   HOUSTON OIL WELL SERVICE 7   J M M ENERGY 3  
HAGAN 6   HERCULES 8   HOUSTON OPERATING 3   J O C OIL 1  
HAGEN 40   HERD 2   HOUSTON PETROLEUM 24   J R B 1  
HAGEN-GREENBRIAR 1   HERITAGE 14   HOUSTON ROYALTY 33   J R G 24  
HAGENS 11   HERLION 7   HOWARD 40   J R OIL & GAS 1  
HAGGARD 1   HERNDEN 3   HOWELL 715   J S & P OPERATING 1  
HAGGARTY 1   HERNDON 16   HOWETH 154   J S PETROLEUM 2  
HAIL 5   HERRING 28   HOXSEY 12   J T R 3  
HAILEY 14   HERRINGTON 8   HRBUTZ 1   J W P EXPLORATION 2  
HAJECATE 3   HERRMANN 1   HUB CITY 1   J W R 12  
HALAMICEK 6   HERSCHAP 7   HUBBARD 4   J-3 OIL 53  
HALBOUTY 146   HERSCHBERGER 1   HUBBLE 10   J-O'B OPERATING 5  
HALL 4   HERTON 1   HUBCO 2   J-W 41  
HALL-HOUSTON 9   HERZSTEIN 1   HUBER 94   J-WIL 2  
HALLIBURTON 7   HESTER 11   HUBER, J.H. 1   J.A.H 1  
HALLMARK 5   HETCO 6   HUBER, J.M. 9   JACKSON 22  
HALLS CREEK 1   HEWIT & DOUGHERTY 281   HUDDLE 10   JACOB 1  
HALLWOOD 5   HEWITT 49   HUDGENS 4   JACOBS 14  
HAMBLEN 1   HEYNE 1   HUDGINS 13   JAD OIL 2  
HAMBY 2   HEYSER 9   HUDSON 22   JADE 6  
HAMCO 3   HIAWATHA 230   HUENERS 1   JAMES ENERGY 1  
HAMILL 213   HIAWATHA(HOLLIDAY) 2   HUFF 2   JAMESON 2  
HAMILTON 91   HIBBERT 18   HUFFCO 23   JAMEX 53  
HAMM 6   HIBERNIA 1   HUFFINGTON 21   JAMIN 15  
HAMMAN 141   HICKEY 1   HUFFMAN 1   JANAN 10  
HAMMAX 1   HICKOK 30   HUGHES 897   JANCO 2  
HAMMER 2   HICKS 10   HUGHEY 6   JANE OIL 1  
HAMMONDS 20   HIDALGO 3   HUISACHE 109   JANEX 2  
HAMON 322   HIDALGO-WILLACY 3   HULSEY 5   JARBE 1  
HAMPTON 3   HIGGINS 3   HULVER 2   JARMAN 1  
HANCO OIL & GAS 1   HIGH ISLAND 6   HUMBLE 5509   JARMON 1  
HANCOCK 8   HIGH PLAINS 10   HUMPHERY 8   JARRELL 3  
HANCORP 1   HIGHLAND OIL 77   HUMPHREY 1   JAY-DEE 21  
HAND 3   HIGHLAND RESOURCES 16   HUMPHRIES 16   JAY-LIN 6  
HANEY 1   HILBURN 2   HUNDRED 2   JAYCO 3  
HANKAMER 68   HILCORP 24   HUNE 1   JAYRED 2  
HANKEY 5   HILL 230   HUNT 491   JEDCO 5  
HANNA 1   HILLCREST 26   HUNT HASSIE EXPL. 1   JEDSCO 1  
HANNAH 2   HILLIARD 56   HUNTER 30   JEFFERS 1  
HANOVER 14   HILLIER 60   HUNTINGTON 5   JEFFERSON LAKE 25  
HANSLIP 5   HILLIN 1   HURBROUGH 8   JEFFRIES 1  
HANSON 392   HILLMAN 2   HURD 75   JENKINS 4  
HANTHO-NELSON 1   HILLSMAN 20   HURLBUT 22   JENNEY 3  
HANTON 1   HILLSMAN-GREENBURG 1   HURLEY 4   JENNINGS 98  
HARBERT 1   HILTY 19   HURT 3   JERCO 2  
HARBOR 1   HIME 1   HUSKY 23   JERGINS 87  
HARDIE 1   HINDS 5   HUTCHINS 15   JERGINS OF TEXAS 5  
HARDIN 12   HINER 3   HUTSON 1   JET 7  
HARDING 18   HINES 4   HYDEN 3   JETCO 1  
HARDWICK 29   HINKLE 25   HYDRO-CARBONS 11   JETSTREAM 1  
HARDWICKE 10   HINSON 18   HYDROCARBON EXPLORATION 1   JETTA 1  
HARDY 1   HINTON 16   HYDROCARBON GATHERING 14   JILPETCO 1  
HARGEST 3   HISTORICAL 2   HYDROCARBON HORIZONS 9   JIMCO 1  
HARGIS 9   HIXON 2   HYDROCARBON MGMT. 1   JOBST 4  
HARGRAVE 27   HOBBY 4   HYDROCARBON OPERATING 6   JOCELYN 2  
HARGROVE 4   HOBLITTZELLE 1   HYDROCARBON PROD 2   JOCELYN-VARN 58  
HARING 130   HOBLITZELLE 1   HYDROCARBON PROD. 17   JOHANSON 2  
HARKEN 8   HOBSCO 3   HYDROCARBON TRANSMISSION 1   JOHNSON 114  
HARKINS 591   HODGE 9   HYLAND 1   JOHNSTON 30  
HARLEY 3   HODGES 1   HYNES 15   JOJON 1  
HARMON 1   HOFFER 5   HYQUEST 67   JOLLEY 1  
HARMONY 5   HOFFMAN 1   HYSO 1   JONES 159  
HARPER 43   HOFHEINZ 1   HYTECH 13   JONES CREEK 1  
HARPER HEFTE 44   HOGAN 5   I M C 4   JONNELL 25  
HARPER, SAM H. 1   HOLBERT 1   I M E F 1   JORDAN 14  
HARPER-SMITH 28   HOLBROOK 5   I O C 8   JOSEY 59  
HARRELL 50   HOLCOMB 1   I O G 2   JOYCE 2  
HARRELL & SOUTHWORTH 15   HOLDEN 22   I P PETROLEUM 9   JOYCE & HILTY 16  
HARRINGTON 2   HOLEMAN 1   I T R 2   JUANITA 1  
HARRIS 21   HOLIDAY RESOURCES 13   IBERIA 1   JUDARTH 2  
HARRIS-FUNK 1   HOLLAND 93   ICARUS 6   JUDD 3  
HARRISON 201   HOLLIDAY 7   IDAHO 3   JUPITER 15  
HARRISON, DAN J., JR. 7   HOLLIMON 55   ILLINOIS PETROLEUM 26   JUSTISS-WEARS 1  
HARROB 1   HOLLIS 2   IMPACT 1   K & A 21  
HARROUN 2   HOLLOWAY 53   IMPERIAL 15   K & H 55  
HARRUS 6   HOLLUB 26   INCA 22   K & K 2  
HART 20   HOLLY 68   INCO 1   K & N 1  
HARTEX 1   HOLMES 55   INDEPENDENCE 2   K & S 2  
HARTMAN 1   HOLOTIK 2   INDEPENDENT 22   K B 34  
HARVARD 2   HOLT 2   INDEXGEO 41   K C 1  
HARVEY 47   HOLTZCLAW 1   INDIOLA 2   K C S 29  
HARWOOD 48   HOMA 4   INDUSTRIAL 16   K D ENERGY 1  
HASBRO 1   HOMABY 7   INEXCO OIL 91   K L S 1  
HASCHKE 4   HOME 22   INGRAM 1   K M D 2  
HASEMAN 1   HONCHO 8   INLAND 39   K O G OPERATING 24  
HASSELMAN 1   HONDO 2   INLAND EXPLORATION 1   K O T 1  
HAUSER 14   HONOLULU 1   INLAND OCEAN 52   K P EXPLORATION 13  
HAVENS 1   HONOR 1   INLAND PETROLEUM 2   K R M 18  
HAWK 1   HOOD 2   INMAN 1    
HAWKEYE 2   HOOKER 2   INTEGRAL 100    
Operator Count   Operator Count   Operator Count   Operator Count  
K T X 4   KRCHNAK 1   LEE 63   LYMAN DAMASCUS 2  
K W B 1   KRENEK 2   LEECO 1   LYMAN(TEXON) 1  
K-2 1   KRESCENT 1   LEEDE 7   LYMAN, C.V. 1  
K-N OPERATING 6   KRITI 1   LEFEVRE 6   LYNAL 1  
KA-HUGH 24   KRUEGER 1   LEGACY 60   LYNBROOK 4  
KA-MATT 3   KRUIDENIER 1   LEGEND 6   LYNCH 34  
KADANE 2   KRUSEN 1   LEGER 12   LYNCO 3  
KAISER OIL 13   KRYSTAL-LIN 1   LEHMERTZ 1   LYND 10  
KAISER-FRANCIS 29   KUBELA 1   LEMARCO 17   LYNDEL 1  
KALER ENERGY 69   KUEBLER 1   LENSGRAF 1   LYNN 8  
KALLIES 1   KUENSTLER 8   LENT 1   LYNNBROOK 1  
KALLINA 45   KUHNS 3   LEONA 1   LYNTON 1  
KALON 1   KUMLER 10   LEONARD 18   LYNX 5  
KALSEA 1   KUNETKA 1   LEONE 2   LYONS 51  
KAMLOK 11   KUYPCO 2   LEPOVITZ 1   LYTLE CREEK 5  
KANE 3   KUYPERS 13   LERN 2   M & B 5  
KANEB 2   KYLE 1   LES TEXAS 3   M & F D C 1  
KANELLOS 1   L & A ENERGY 4   LESH 9   M & G OPERATING 5  
KANSAS 1   L & B OIL 12   LESKO 1   M & R EXPLORATION 1  
KARBUHN 2   L & F 10   LESS 1   M & S 1  
KARCHER 2   L & L PETROLEUM 72   LEUSCHNER 1   M & W 15  
KARNCO 5   L & M 1   LEVERIDGE 6   M C A 20  
KARNES 4   L & T 1   LEVINSON 1   M C O R 7  
KARSTEN 76   L & W 2   LEVY 1   M C OIL 9  
KASAN 2   L B N 3   LEWIS 197   M C S 2  
KATE 1   L C R A 8   LEWIS PETRO 16   M C Z 10  
KATZ 293   L G D C 7   LEXINGTON 2   M G EXP 8  
KAULBACH 9   L G J 6   LEY 13   M G F 60  
KAYE 3   L L T 1   LIBERTY 23   M G U 2  
KAYLIN 1   L M N 5   LICO 2   M H 2  
KEAHEY 10   L M P 8   LIEBMAN-GIBSON 2   M IV OPS 2  
KEARNEY 1   L N R 1   LIFESTYLE 19   M J C 2  
KEATOR 1   L R F 1   LIGHT 3   M J G 38  
KEBO 163   L TEXAS 37   LIGHTHOUSE 12   M J M 1  
KECK 4   L V O 1   LIGHTNING 70   M K 24  
KEEHAN 2   L X EXPLORATION 1   Lignite 1   M K N 4  
KEEL 1   LA CAMPBELL 3   LILES 1   M L 1  
KEELS 1   LA COASTAL 21   LIMES 3   M L C 1  
KEEMAC 4   LA GLORIA 293   LIMESTONE 3   M L RESOURCES 5  
KEENE 5   LA GORCE 6   LINCOLN 2   M M C 2  
KEETON 1   LA HOLLO 5   LINDA 1   M P G 12  
KEFT OIL 1   LA JET 4   LINDEMUTH 1   M P PETROLEUM 1  
KEG 11   LA JITA 8   LINDER 6   M P S 75  
KEGLEY 1   LA JOLLA 4   LINDHOLM 16   M R EXPLORATION 1  
KELJIKAN 4   LA JOYA 1   LINGEN 23   M R T 1  
KELLER 2   LA NELLE 2   LINK 8   M W J 5  
KELLEY 12   LA PARITA 9   LINK OIL &GAS 1   M W PETROLEUM 10  
KELLY 31   LA PRYOR 2   LINKENHOGER 1   M W R 1  
KELPETRO 8   LA ROCA RESOURCES 1   LINNE 6   M-G GAS CO 1  
KELSEY 21   LA ROSA 16   LION 14   M-L INC. 2  
KELSO 3   LA RUE 2   LIPAN 2   M-TEX 7  
KEMP 2   LA SALLE 8   LIPSCOMB 9   M-V 6  
KEMPER GLICK 1   LA TERRE 3   LISSIE 1   MABEE 21  
KEN 54   LAB OIL 21   LITTLE 70   MABRY 2  
KEN-KAN 2   LABELLE 3   LITTLE GIANT 4   MAC DRILLING 8  
KENDALL 7   LACAL 19   LITTLEFIELD 2   MAC'S DRILLING 5  
KENERGY 3   LACEY 19   LITTLEPAGE 1   MACDIARMID 1  
KENNARD 45   LACK 2   LITTLETON 1   MacDONALD 19  
KENNE 1   LACY 46   LIVE OAK 12   MACEO 8  
KENNECOTT 1   LADD 134   LIVELY 45   MACERO 23  
KENNEDY 9   LAGARTO 1   LIVINGSTON 3   MACHII-ROSS 15  
KENNON 1   LAGERQUIST 4   LLOG 1   MACHIN 3  
KENTEX 3   LAGO 4   LLOYD 8   MACK 3  
KENYON 16   LAGUNA 1   LOBAR 2   MACKEY 9  
KEPLEY 9   LAHOMA 1   LOBO 90   MACKHANK 55  
KEPLINGER 1   LAIN 1   LOCAL 10   MACLANE 1  
KEPPLER 1   LAIRD 1   LOCHRIDGE 2   MACNAUGHTON 1  
KERN 3   LAKE 11   LOCKE 2   MACPET 17  
KERNS 5   LAKE RONEL 15   LOCKHART 186   MACQUEST 1  
KERR-MCGEE 34   LAKEVIEW 1   LOCO 1   MADDOX 2  
KEWANEE OIL 9   LAKEWOOD 15   LOFCO 2   MADDUX 5  
KEY 2   LAMMERTS 2   LOFFLAND 9   MADERA 8  
KEYSTONE 7   LAMONT 2   LOFLIN 3   MADRID 17  
KGMH 1   LANCE 6   LOGUE 244   MADRONE 3  
KIBBE 19   LAND RESOURCES 6   LOHMAN 1   MAER 1  
KIDD 25   LANDA 1   LOKEY 1   MAGALIS 1  
KIEL 36   LANDES 3   LOMA ALTA 1   MAGEE 2  
KILGORE 37   LANDMARK 1   LOMA OIL 10   MAGGERT 6  
KILGORE & COFFEE 1   LANDRESS 4   LOMA VERDE 1   MAGNA 3  
KILGORE-TURNER 1   LANDRETH 9   LOMAC 1   MAGNETIC 1  
KILLAM 949   LANDRUM 6   LOMACK 1   MAGNOLIA 1923  
KILLINGER 1   LANG 44   LOMAK 9   MAGNUM 50  
KILLINGSWORTH 1   LANGHAM 6   LONDON PETROLEUM 2   MAGUIRE 164  
KILMARNOCK 2   LANIER 1   LONE OAK 3   MAIN 3  
KILROY 173   LANKARD 1   LONE STAR 320   MAJESTIC 3  
KIMBALL 3   LANN 2   LONG 29   MAJO 3  
KIMBARK 1   LANNING 3   LONG BROTHERS 8   MAJOR 16  
KIMBELL 2   LANNING-COFFIELD 1   LONG TRUSTS 1   MALLARD 7  
KIMMEL 1   LANTANA 15   LONGHORN 83   MALLORY 1  
KIMMELL 5   LAPIS 1   LOONEY 2   MALOMAR 1  
KIMMEY 41   LAPO 1   LOPEZ 2   MAN-GAS 2  
KIN-ARK 2   LARCO 2   LORDSTONE 1   MANA 30  
KING 124   LAREDO 2   LOS GATOS 17   MANAHAN 7  
KING-HOARD 1   LAREDO ENERGY 5   LOS NIETOS 5   MANCO 42  
KING-TEX 3   LAREDO WATER WORKS 1   LOTT 1   MANDARIN 16  
KINGDOOR 1   LARIO 10   LOU LITTLE 2   MANECO 3  
KINGWOOD 24   LARKINS 2   LOUDON 13   MANETAS 1  
KINLAW 4   LAROCA 1   LOUIS DREYFUS 65   MANFORTH 3  
KINLEY 2   LAROCA RESOURCES 5   LOUISANA GAS 3   MANFRED 11  
KINNEAR 2   LAROCO LLP 16   LOUISANA LAND 1   MANGES 45  
KINS 7   LARON 4   LOUISIANA CAMPBELL ENERGY 1   MANGUM 20  
KINSEL 1   LARS 1   LOUISIANA GENERAL PETROLEUM 11   MANLER 1  
KINSEY INTEREST 3   LARSEN 2   LOUISIANA LAND & EXPL 15   MANLEY 44  
KIOWA 11   LARUE 2   LOUISIANA NATURAL 1   MANNING 12  
KIRBY 105   LAS TECAS 1   LOUISIANA OIL REFINING 1   MANOR 10  
KIRK 2   LASITER 1   LOVE 6   MANRY 2  
KIRKPATRICK 108   LASMO ENERGY 1   LOVE & SUN 1   MANTI 58  
KIRKSMITH 4   LATIMER 2   LOVELADY 57   MANTLE 1  
KIRKWOOD 589   LATTNER 13   LOWE 16   MAPCO 5  
KIRKWOOD & MORGAN 1   LAUGHLIN 43   LOWER COLORADO RIVER AUTHORITY 2   MAPLES 1  
KISSINGER 9   LAUREL 8   LOWMAR 3   MAR 4  
KLABZUBA 8   LAURITZEN 11   LOWRANCE 1   MAR-TEX 2  
KLEBERG 3   LAVACA 7   LP OPERATING 2   MARALO 6  
KLEIN 1   LAWBAR 45   LU-TEX 4   MARAN 6  
KLEINER 7   LAWLER 2   LUBBOCK COTTON 2   MARATHON 79  
KLING 20   LAWLESS 9   LUCAS 1   MARCELL 1  
KLOSTER 1   LAWLOR 7   LUCEY 6   MARCH 1  
KLOTZMAN 25   LAWRENCE 2   LUCK PETROLEUM 1   MARDAM 13  
KNICKERBOCKER 1   LAWSON 1   LUCKY 6   MARGO 2  
KNIGHT 4   LAY 2   LUETH 1   MARIAH 3  
KNOTT 1   LAYNE 10   LUHN 1   MARINE 19  
KNOX 2   LAYNE TEXAS 10   LUKER 1   MARINE GATHERING 2  
KOBA 4   LAZARUS 1   LULING 149   MARINER 2  
KOCH 1   LE CUNO 6   LULOC 2   MARINO 6  
KODIAK 2   LEACH 7   LUNDBERG 38   MARION 25  
KOENIG 2   LEAHY 4   LUNDELL 23   MARK IV 43  
KOLLMAN 1   LEAKE 1   LUNDELLS 23   MARK PRODUCING 4  
KOSAREK 6   LEAR 13   LUNDIN 1   MARKHAM 1  
KOSSA 1   LEARY 1   LURA 1   MARKS 28  
KOTTICK 1   LEATHERWOOD 1   LUSK 2   MARLAND 1  
KRAAK 2   LEBEN 1   LUSKEY 1   MARLEX 1  
KRAFTEX 2   LECHE 1   LUTTES 1   MARLIN 5  
KRAGSETH 2   LECUNO 2   LYDA 1   MARLINE 9  
KRASNER 7   LEDGE 1   LYLES 9    
KRAUSE 1   LEDLOW 2   LYMAN 88    
Operator Count   Operator Count   Operator Count   Operator Count  
MARMADUKE 6   MEAD 2   MONTEGO 9   NETH 1  
MARQUEE 101   MEADERS 2   MONTEREY 15   NETH & SCHORSCH 1  
MARR 4   MEADOW VIEW 2   MONTERREY 35   NETHERLAND 1  
MARRIOTT 1   MEANS 7   MONTGOMERY 3   NETTLECOMBE 1  
MARSH 65   MEBANE 4   MOODY 19   NETWORK 1  
MARSHALL 55   MECEY 1   MOORE 194   NEUHAUS 79  
MARSTON 4   MECO 8   MOORINGSPORT 5   NEUMANN 1  
MARTEX 4   MECOM 90   MOOSE 27   NEUMIN 147  
MARTIN 198   MED-TEX 6   MORAN 56   NEW 1  
MARTIN-BAKER 3   MEDALLION 7   MORCO 3   NEW CENTURY 15  
MARTINETS 1   MEDDERS 5   MORELAND 1   NEW HORIZON 1  
MARTS 1   MEEK 2   MOREOIL 1   NEW HORIZONS 1  
MARYE 5   MEEKER 39   MORGAN 590   NEW SEVEN FALLS 5  
MARYLAND 19   MEEKS 1   MORGAN-GULF 4   NEW ULM 4  
MARZO 2   MEGA 1   MORLAS 1   NEW-TEX 2  
MASCOT 14   MEGAHAN 3   MORMAC 256   NEWFIELD 15  
MASIRAN 2   MEGO 4   MORRE 1   NEWFIELD EXPLORATION 79  
MASON 26   MEJLAENDER 2   MORRIS 33   NEWGULF 3  
MASS ENERGY 1   MELBA 43   MORRISON 9   NEWHALL 2  
MASSENGILL 2   MELLARD 1   MORROW 1   NEWITT 18  
MASSEY 2   MELLON 32   MORSE 4   NEWMAN 188  
MASSINGILL 61   MELMERICH 1   MORSEY 11   NEWMONT 3  
MASTEN 2   MELTON 2   MORTCO 1   NEWPORT 4  
MASTERSON 3   MEMORIAL EXPLORATION 1   MORTEX 3   NEWTON 55  
MATADOR 2   MENGDEN 28   MORTIMER 80   NICCO 2  
MATAGORDA 12   MENGER 1   MORTON 3   NICHOLLS 1  
MATHEWS 3   MERCURY 16   MOSBACHER 245   NICHOLS 8  
MATHIS 1   MEREDITH 79   MOSELEY 21   NICHOLSON 3  
MATLOCK 2   MERIDIAN 63   MOSELLE 1   NICKEL 1  
MATRIX 1   MERIT 16   MOSS 29   NICKLOS 7  
MATTHEWS 4   MERREN 2   MOSS & ADAMS 1   NIELSEN 4  
MATTKE 1   MERRICK 33   MOSS & WATSON 4   NIMROD 1  
MATZINGER 29   MERRITT 13   MOSSER 81   NIX 1  
MAUCH 1   MERY 1   MOTCO 3   NIXON 12  
MAUDLOWE 2   MESA 37   MOTEX 43   NOACK 1  
MAURER 1   MESA CHICA 2   MOTI 1   NOAKE 1  
MAVERICK 35   MESQUITE 14   MOTT 7   NOBB 2  
MAXIMA 6   MESSENGER 1   MOULDEN 1   NOBLE 45  
MAXUS 10   MESSER 15   MOULTON 7   NOBLESON 13  
MAXWELL 11   MESSERS CO. 4   MOUND 26   NOLA OIL & GAS 1  
MAY 36   MESTENA 56   MOUNT 8   NOLAN 1  
MAYAN 1   METALS SERVICE 11   MOUNTAIN TOWNSITE 1   NOLEN 8  
MAYCO 1   METANO ENERGY 7   MOWINCKLE 6   NOMAD 2  
MAYFAIR 53   METCO 3   MOWINKLE 11   NOMECO 4  
MAYFIELD 15   METRO 1   MS GUIDANCE 1   NOR-AM 4  
MAYNARD 36   METROPOLITAN OIL 8   MUCKELROY 1   NOR-MAC-BURNS 1  
MAYNE 4   METTS 1   MUDGE 5   NORANDA 4  
MAYO 34   MEYERS 28   MUELLER 230   NORBLA 1  
MAYS 1   MIAMI 20   MUGG 1   NORCEN 1  
MAZURICK 1   MICHAEL 124   MULE 2   NORCOFF 1  
McALESTER 13   MICHAUX 39   MULLE 3   NORCROSS 1  
McALISTER 1   MICHEL 2   MULTI-ENERGY 1   NORDAN 22  
McALL 3   MICHELSON 21   MULVER 1   NORDIC 2  
McALPIN 3   MID AMERICA 2   MUNDY 1   NORDSTRAND 1  
McBEE 13   MID COAST 3   MUNN 1   NOREMAC 6  
McBRAYER 1   MID CONTINENTAL 1   MUNSON 3   NORINO 1  
McBRIDE 107   MID GULF 2   MURCHISON 21   NORMANDIE 5  
McCABE 56   MID KANSAS 1   MURCO 1   NORMANDY 14  
McCAIN 1   MID-AMERICAN 24   MURDICK 1   NORRIS 20  
McCALEB 15   MID-CENTURY 3   MUREXO 6   NORSWORTHY 14  
McCAMERON 1   MID-CONTINENT 25   MURLYNSON 9   NORTEX 21  
McCAMEY 1   MID-STATES 2   MUROC 1   NORTH 2  
McCANDLESS 1   MID-TEXAS 7   MURPHEY 26   NORTH AMERICAN 109  
McCARRICK 56   MIDAS 3   MURPHY 20   NORTH CENTRAL 177  
McCARTER 40   MIDDLETON 10   MURRAY 25   NORTH PADRE EXPL 2  
McCARTHY 96   MIDHURST 19   MURRELL 1   NORTH PETTUS 14  
McCARTY 1   MIDLAND 40   MURRY 1   NORTH ROSS OIL 1  
McCLAIN 71   MIDSTATES 86   MUSS 5   NORTH SHORE 7  
McCLUNG 3   MIDTEX 1   MUSSELMAN 29   NORTH STAR 13  
McCOLLUM 7   MIDWAY 26   MUSTANG 69   NORTH TEXAS 5  
McCOMBS 8   MIDWEST 81   MUSTEEN 7   NORTHERN MICHIGAN 7  
McCONNELL 1   MIERS 1   MUTEX 1   NORTHERN NATURAL 10  
McCORD 43   MIHOVAL 1   MUTUAL OIL 6   NORTHERN ORDINANCE 9  
McCORMICK 173   MIKTON 3   MYER 1   NORTHERN PUMP 116  
McCRACKEN 2   MILAGRO 10   MYERS 5   NORTHSTAR 3  
McCRIGHT 2   MILAM 14   N E G 6   NORTHWEST ARKANSAS 1  
McCULLOCH 17   MILES 8   N F C PETROLEUM 1   NORTHWEST OIL 4  
McCULLOUGH 7   MILESTONE 22   N F OIL 1   NORTON 55  
McCURDY 20   MILHAM 1   N G C ENERGY 1   NOUVELLE 1  
McCUTCHIN 6   MILLER 304   N M-YATES 1   NOVA ENERGY 2  
MCDADE 1   MILLER & DONZIS 1   N P ENERGY TEXAS 12   NOVUS OIL 1  
McDANIEL 5   MILLER & FOX 29   N P U UNION PRODUCING 1   NOVUS OIL & GAS 1  
McDANNALD 39   MILLER & PIERCE 25   N R G 6   NOYES 1  
McDERMOTT 37   MILLICAN 77   N R M 3   NU-ENAMEL 1  
McDONALD 23   MILLS 1   N R M C 1   NU-SAN 5  
McDONNOLD 2   MILLSAP 9   N S T 1   NUCORP 49  
McDOUGAL 2   MILNER 7   NAFCO 2   NUECES COMPANY 11  
McDOWELL 3   MILO 1   NAILS CREEK 1   NUECES MINERALS 4  
McDRILLING 2   MILTEX 5   NAIVAR 1   NUECES OIL 15  
McELVAIN 8   MIM 11   NANJO 1   NUECES RESERVES 2  
McFADDEN 8   MIN-TEX 3   NAPECO 9   NUECES ROYALTY 7  
McFADDIN 1   MINAHAN 1   NARECO 1   NUECO 1  
McFARLAND 38   MINDEN 8   NARMCO 1   NUEVE 13  
McFARLANE 33   MINER 14   NASA 1   NUGENT 6  
MCGAHEY 1   MINERAL DEVELOPMENT 1   NASH 2   NUGGET 46  
McGALLIARD 10   MINERAL PROJECTS 2   NATIONAL ASSOCIATED 5   NULL 87  
McGARR 43   MINERAL RESOURCES 1   NATIONAL BULK 2   NUTECH 1  
McGEHEE 1   MINERALS EXPLORATION 1   NATIONAL DRILLING 3   NUTEX 3  
McGLOTHLIN 1   MINERALS OF TEXAS 2   NATIONAL ENERGY 4   O G P OPERATING 7  
McGOLDRICK 3   MINTON 4   NATIONAL EXPLORATION 43   O H B 8  
McGORICK-SMITH 1   MINUTEMAN 1   NATIONAL GULF 1   O K WELL SERVICE 2  
McGOWAN 12   MIRADA 4   NATIONAL INVESTOR 1   O S R 1  
McGREGOR 14   MIRAMAR 41   NATIONAL OIL 29   O'BRANNON 1  
McGUFFIN 10   MIRANDO CRUDE 1   NATIONAL ONSHORE 6   O'BRYNE 1  
McGUIRE 1   MISSION 12   NATIONAL OPERATING 1   O'BYRNE 2  
MCGUIRT 3   MISSION RESOURCES 1   NATIONAL PETROLEUM 5   O'CONNOR 4  
McHENRY 1   MISSION RIVER 6   NATIONAL PIPE & SUPPLY 1   O'DONNELL 1  
McHUGH 5   MITCHAMORE 7   NATIONAL RESOURCES 3   O'HERN 10  
McIVER 2   MITCHELL 231   NATOMAS 8   O'HORNETT 4  
McKAY 1   MIZEL</