Operator List

Operators: 5918

Operator Count   Operator Count   Operator Count   Operator Count  
263   AMAX 27   ASHER 2   BARRY 28  
1988 INDEXGEO J.V. 1   AMBASSADOR 20   ASHFORD 15   BARTELS 1  
5-D OPERATING 2   AMBERTON 4   ASHLAND 33   BARTESSA 1  
A & A 3   AMBROSIA MINERALS 1   ASHLEY 1   BARTGIS 1  
A & D 1   AMCOLE 2   ASHTOLA 6   BARTH 1  
A & D EXPL 5   AMEND 7   ASPECT 6   BARTHOLOMEW 1  
A & M 2   AMERADA 284   ASPEN 2   BARTLE 3  
A & R 2   AMERICAN AUSTRALIAN 1   ASSOCIATED OIL 98   BARTLE & BARTLE 1  
A & T 15   AMERICAN COASTAL 4   ASTIN 1   BARTLETT 2  
A A A OPERATING 5   AMERICAN COMETRA 39   ASTRO 4   BASA RESOURCES 6  
A C R 1   AMERICAN DELTA 9   ATAPCO 22   BASELINE O & G 1  
A K M 2   AMERICAN DRILLING 7   ATASCA RESOURCES 3   BASIC EARTH SCIENCE 14  
A M & R 3   AMERICAN ENERGY 17   ATASCO 10   BASIC ENERGY 5  
A N R 8   AMERICAN EXPLORATION 23   ATASCOSA OIL & GAS 1   BASIN 13  
A O E OPERATORS 2   AMERICAN FIRST ENERGY 1   ATASCOSA TRUST 1   BASOM 3  
A O P 9   AMERICAN HUNTER 1   ATCHISON 3   BASS 178  
A P D 9   AMERICAN INTERNATIONAL 19   ATHENS 2   BASTROP 4  
A P I 2   AMERICAN LIBERTY 36   ATKINS & O'NEIL 5   BATEMAN 9  
A R P 1   AMERICAN NATURAL GAS 22   ATKINS MINERALS 2   BATES 4  
A W P 15   AMERICAN OPERATING 1   ATKINSON 18   BATEX 3  
A.T.O.P.P. 1   AMERICAN PETROFINA 136   ATLANTIC 966   BATON 5  
ABACO 12   AMERICAN PETROLEUM 1   ATLAS 4   BATTAILE & KNISELY 1  
ABBEVILLE 1   AMERICAN PLASTI-PLATE 1   ATOKA 1   BAUCHMAN 2  
ABBOTT 10   AMERICAN PUBLIC ENERGY 4   ATTEBURY 2   BAUGH 1  
ABCO 12   AMERICAN QUASAR 12   ATWOOD 21   BAUMAN 3  
ABEL 35   AMERICAN REPUBLIC 33   AUBURN 9   BAXTER 108  
ABER 2   AMERICAN SHORELINE 57   AUDAS 5   BAY CITY DRILLING 11  
ABERCROMBIE 100   AMERICAN STANDARD 2   AUGUST 1   BAY CITY REFINING 4  
ABERNATHY 1   AMERICAN TEXAS 5   AUGUSTA 1   BAY OIL 9  
ABRAHAM 1   AMERICAN TRADING 18   AULD 20   BAY PRODUCTION 3  
ABRAXAS 101   AMERICO 4   AURORA 19   BAY ROCK 78  
ABSHER 3   AMERICUS 1   AUSTEX 1   BAYNES 10  
ABSHIER 1   AMERITEX 1   AUSTIN 25   BAYPORT 4  
AC EXPLORATION 3   AMES 4   AUSTRA-TEX 7   BAYRIDGE 1  
ACCO 91   AMEX SYSTEMS 1   AUSTRAL 93   BAYSIDE 20  
ACCUMULATIVE ROYALTY 2   AMHERST 1   AUTREY 1   BAYSTAR 1  
ACHE 1   AMIGO 2   AUTUMN 1   BAYTEX OIL 32  
ACHNING 7   AMIGOS 1   AV-TECH 1   BEACH 16  
ACIETEROS 5   AMINEX USA 1   AVALANCHE 3   BEACHAM 1  
ACME 3   AMINI 1   AVERILL 56   BEACON 15  
ACOCK 55   AMINOIL 28   AVERY 7   BEADLE 1  
ACOCK/ANAQUA 36   AMISTAD 2   AWOEB 3   BEALL 3  
ACOMA 4   AMMAN & McNAB 2   AXEM 8   BEAMAN 5  
ACORN 4   AMMCO 3   AXIO 2   BEAMON 6  
ADA 72   AMMEX 15   AXIS 1   BEARD 15  
ADAIR 2   AMMONITE 4   AYERS 5   BEASLEY 1  
ADAMS 62   AMOCO 317   AYERS & SWOPE 1   BEATY 1  
ADCO 3   AMOY 10   AYRES 13   BEAUCHAMP 2  
ADCOCK 1   AMPAK 37   AZALEA 2   BECHTEL 1  
ADDINGTON 3   AMPECO 2   AZAR 1   BECK 15  
ADELANTE 1   AMPHION 1   AZMUTH 1   BECKER 32  
ADELON 2   AMPOLEX 1   AZTEC 14   BECKHAM 2  
ADENA 2   AMSLER 9   AZUL 6   BECKMAN 9  
ADKINS 1   AMUREX 1   B & B 12   BECO 2  
ADMIRAL 2   ANADARKO 50   B & D 1   BEDWELL 16  
ADOBE 28   ANAQUA 59   B & E 1   BEER 26  
ADRIAN 1   ANCIENT SEAS 1   B & G 6   BEGEMAN 9  
AEGEAN 7   ANCIRA 1   B & K 1   BEHEMOTH 4  
AEGIS 2   ANCON OIL 11   B & L 2   BEHRING 1  
AEOX-ST 2   ANDERMAN 6   B & M 20   BEL OIL 7  
AERO COLOMA 1   ANDERSON 180   B & S 1   BEL-POTA 3  
AFROMA 53   ANDERSON-PRICHARD 35   B & W 1   BELAIRE 1  
AGCO 4   ANDOVER 7   B B L 3   BELCHER 4  
AGOIL 34   ANDRADE 34   B B M 16   BELCO 65  
AGSCO 6   ANDRAU 4   B D K 113   BELGAM 8  
AHERN 20   ANDRAU-HADA 1   B D PRODUCTION 33   BELL 25  
AID 12   ANDREEN 2   B D R 3   BELL & DANSFIELL 21  
AIKMAN 13   ANDRES 2   B G EXPLORATION 1   BELL, JAY 1  
AKIN 3   ANDRESS 38   B H P 29   BELL, KELLY 64  
AKRON 6   ANDREWS 88   B H P PETROLEUM 1   BELLOWS 2  
ALABAMA MINERALS 1   ANDRUS 9   B J B 15   BELLWETHER 3  
ALABLANCA 1   ANGEL LAND 2   B J OIL MANAGEMENT 1   BELMONT 1  
ALADDIN 2   ANGELINA 3   B M W RESOURCES 2   BENEDUM 11  
ALAMO 43   ANGLO PRODUCTION 2   B N P 39   BENEDUM-TREES 43  
ALANCO 2   ANGLO-DUTCH 1   B P AMERICA 14   BENGAIL 3  
ALANIZ 5   ANGLO-NATIONAL 2   B P L 1   BENGE 1  
ALASKA STEAMSHIP 129   ANHUR 5   B P PRODUCTION 6   BENHAM 1  
ALASKA TEX 3   ANISMAN 2   B S E PRODUCTION 5   BENNETT 35  
ALBRECHT 4   ANKENMAN 4   B T 6   BENNETT, MILLS 154  
ALBRIGHT 2   ANN 1   B T A OIL 31   BENSON 13  
ALCO DRILLING 16   ANSCHUTZ 52   B W A B 1   BENTEX 6  
ALCO OIL 11   ANSELMA 1   B Y S INC. 1   BENTON 1  
ALCOA 88   ANSTER 1   B-G OPERATING 1   BENTSEN 72  
ALCOR 2   ANTARA 1   BABB 1   BENZ 7  
ALCORN 16   ANTARES 28   BACARISSE 1   BENZ-STODDARD 5  
ALECO 1   ANTEX 2   BAGDAD 3   BENZAQUIN 1  
ALEXANDER 8   ANTLER 2   BAGNALL 1   BEPCO 2  
ALFORD 6   APACHE 146   BAHIA 30   BERENERGY 12  
ALGORD 1   APCO 2   BAILEY 38   BERG 1  
ALICE 2   APEX ENERGY 29   BAINBRIDGE 2   BERGMAN 37  
ALICE OIL 1   APEX OIL 4   BAKER 23   BERING 32  
ALKEK 47   APEXCO 5   BAKKE 29   BERKLEY 2  
ALL AM 5   APOLLO 5   BALBOA 2   BERKSHIRE 1  
ALLAUN 1   APPELL 246   BALD 2   BERLY 1  
ALLBRIGHT 1   APPLE 1   BALDRIDGE 164   BERNARD 1  
ALLDAY 24   APPLIED THERMAL 2   BALLANFONTE 3   BERRY 3  
ALLEGRO 74   APPLING 1   BALLARD 48   BERTELSON 1  
ALLEN 115   AQUILA 6   BALLENGEE 1   BERTMAN 1  
ALLEN & MORRIS 5   AQUITAINE 1   BALTIC 20   BEST 1  
ALLEN & SHUMATE 5   ARANSAS 9   BAM 2   BETA 1  
ALLERKAMP 10   ARAPAHO 1   BAMM 1   BETTIS 70  
ALLIANCE 7   ARAXAS 3   BAMMERT 1   BEVERS 1  
ALLIED DRILLING 6   ARCADIA 10   BANCROFT 2   BEVLY 31  
ALLIED HYDROCARBONS 2   ARCHER 6   BANDER 1   BEXCO 20  
ALLIED OIL 2   ARCO 355   BANDERA 3   BID-RICH 1  
ALLIED PRODUCTION 10   ARCTURUS 1   BANKHEAD 17   BIG 6 DRILLING 47  
ALLISON 7   ARENA 20   BANKLINE 7   BIG CHIEF 2  
ALLTEX 2   ARENDALE & LOWE 3   BANKS MILLER 3   BIG LAKE 5  
ALMAC 8   ARGO 282   BANNER 2   BIG SHELL 4  
ALMAR 3   ARGOS 4   BANNON 2   BIG SPRINGS 6  
ALPHA ENERGY 1   ARGUS 3   BAR D 3   BIGHART 2  
ALPHA EXPLORATION 7   ARGYLE 1   BAR M 18   BIGHORN 1  
ALPHA GAS 8   ARICK 1   BAR MAR 2   BIGLANE 2  
ALPHA OIL 2   ARIES 1   BAR S 1   BILBO 14  
ALPHA OMEGA ENERGY 4   ARK 15   BAR-MAC 1   BILLFISCH 4  
ALPHA PRODUCTION 1   ARKANSAS FUEL 252   BAR-MAR 1   BILLINGS 9  
ALSABROOK 2   ARKLA 7   BARBARA 16   BINNEY 1  
ALSAN 2   ARLEDGE 12   BARBEE 6   BINTLIFF 13  
ALTA 1   ARMADA 4   BARBER 12   BIRD 1  
ALTA ENERGY 2   ARMER 1   BARBRE 1   BIRDWELL 59  
ALTA MESA 6   ARMOUR 42   BARGE 1   BISCO 1  
ALTA VISTA 13   ARMOUR-RICHARDS 1   BARGO ENERGY 2   BISHOP 43  
ALTEX 2   ARMSTRONG 100   BARIA 18   BISKAMP 2  
ALTGELT 1   ARMSTRONG & HORN 11   BARKER 4   BISSELL 1  
ALUMINUM CO. OF AMERICA 175   ARMSTRONG & SUTTON 19   BARNEBURG 10   BISSETT 1  
ALWORTH 1   ARNOLD 26   BARNES 20   BITTNER 1  
ALYANA 1   ARNOLD WELL SERVICE 95   BARNETT 4   BLACK 37  
ALYNDSON 2   ARRIBA 46   BARNHART 8   BLACK GOLD 2  
AM-RDC 1   ARRINGTON 3   BARNHILL 7   BLACK RIVER 4  
AM-TEX 2   ARROW 34   BARNSDALL 221   BLACK ROCK 9  
AMAL 2   ARROWHEAD 2   BARNWELL 6   BLACKBRUSH 1  
AMALGAMATED 7   ARROYO 1   BARON 5    
AMAR 5   ARSHT 1   BARRACUDA 1    
AMARCO 1   ARTZBERGER 1   BARRANCA 1    
AMAREX 1   ASAMERA 10   BARRETT 4    
AMARILLO 5   ASCENT 13   BARRIER 7    
Operator Count   Operator Count   Operator Count   Operator Count  
BLACKFOOT 1   BRINKOETER 3   CAL MON 1   CHANDLER 2  
BLACKJACK 7   BRISCOE 22   CAL-TEX 3   CHANOCO 29  
BLACKMAR 2   BRISTOL 3   CALADONIA 1   CHAPARRAL 27  
BLACKWELL 1   BRISTON 1   CALAME 1   CHAPARROSA 27  
BLAFFER 5   BRISTOW 15   CALATEXIA 1   CHAPCO 1  
BLAIR 25   BRITANCO 1   CALAWAY 16   CHAPMAN 139  
BLAIR-VREELAND 193   BRITISH AMERICAN 62   CALCO 2   CHARLTON 10  
BLAIRSVILLE 2   BRITISH TEXAN 8   CALDWELL 8   CHARO ENERGY 10  
BLAKE ENERGY 9   BRITTANY 1   CALHOUN 2   CHARRO 35  
BLALOCK 2   BROAD OAK 1   CALIBOGUE 2   CHARTER 2  
BLANCHARD 21   BROADHEAD 1   CALIBRI 1   CHASE 8  
BLANCO 216   BROADUS 6   CALIFORNIA CO. 12   CHASS 25  
BLANKE 1   BROADWAY 1   CALIFORNIA TIME 1   CHASTAIN 1  
BLANTON 6   BROCATO 9   CALIFORNIA TIMES 3   CHAVANNE 24  
BLAZER 6   BROCK 39   CALIX 1   CHENOWETH 1  
BLEAKLEY 14   BROGAN 2   CALLAHAN 2   CHEROKEE 9  
BLEDSOE 2   BRONCO 2   CALLAWAY 18   CHEROSAGE 22  
BLOCK 1   BROOKLYN 9   CALLENDER 2   CHERRY 7  
BLOCKER 46   BROOKS 5   CALLERY 40   CHERRYVILLE 37  
BLOHM 6   BROONER 28   CALLON 5   CHESAPEAKE 65  
BLOMGREN 3   BROSECO 13   CALOHAN 11   CHESNUTT 5  
BLOUNT 18   BROWN 358   CALPINE 2   CHESSER 1  
BLUCHER 2   BROWNING 10   CALVERT 78   CHESSHER 1  
BLUCO 14   BRUMMETT 10   CAM CORP. 15   CHEVRON 115  
BLUE JAY 8   BRUNER 57   CAMBELL 3   CHEYENNE 5  
BLUE RIDGE 5   BRUNNETT 1   CAMBRIAN 1   CHICAGO 350  
BLUE SKY 23   BRUNO 3   CAMBRIDGE 53   CHICO OIL 1  
BLUE WATER 3   BRUNS 39   CAMDEN 34   CHIEF 1  
BLUE WING ENERGY 1   BRYAN 15   CAMERINA 3   CHILDERS 10  
BLUEBONNET 3   BRYANT 40   CAMERON 97   CHILDRESS 1  
BLUERIDGE 3   BUCHANAN 41   CAMINO 12   CHILES 76  
BLUESTONE 3   BUCK 24   CAMOIL 1   CHILTIPIN 3  
BLUFF 2   BUCKALOO 9   CAMP 114   CHINN 7  
BLUHAWK 1   BUCKINGHAM 13   CAMPANA 4   CHIODO 2  
BLUMBERG 10   BUCKLEY 8   CAMPARIA 1   CHIPPEWA 1  
BLUMENTHAL 2   BUDA 2   CAMPBELL 53   CHIQUITA 2  
BLUTCH 2   BUELL 2   CAN-AM 1   CHISHOLM 1  
BOB'S SERVICE 1   BUESCHER 3   CANADIAN NORTHWEST 1   CHIZUM 26  
BOCK 6   BUETTNER 1   CANALES 28   CHOATE 2  
BOCK & ANDERSON 1   BUFFALO 15   CANKIE 1   CHOCTAW 1  
BODE 2   BUNN 12   CANNAN, MORRIS 154   CHOICE 27  
BOEGENTER 1   BUNTE 10   CANNAN-SUBSURFACE 1   CHOYA DRILLING 13  
BOLDING 2   BUNTIN 1   CANNON 12   CHRISCO 1  
BOLIN 10   BUR-KAN 1   CANNONBALL 2   CHRISTIAN 3  
BOLING 8   BURCH 21   CANTEX 1   CHRISTICO 31  
BOLLER 4   BURDEN 1   CANTRELL 1   CHRISTIE 116  
BOLLING 1   BURDETTE 1   CANTRO 9   CHRISTILIN 2  
BOLLMAN 1   BURDITT 2   CANUS 169   CHRISTINA 1  
BOLSA 1   BURFORD 2   CANUSA 4   CHRISTOPHER 35  
BOLTON 2   BURK ROYALTY 69   CAPE 1   CHUMNEY 1  
BOMMER 18   BURKART 1   CAPITAL STAR 9   CHURCH 4  
BONANZA 6   BURKE 21   CAPITAN 1   CICHOWSKI 6  
BONAVENTURE 5   BURKHARDT 1   CAPITOL 51   CICO 105  
BOND, DURBIN 20   BURKHART 6   CAPITOL RESOURCES 6   CIMAREX 6  
BOND, ROLAND 4   BURLESON 8   CAPPS 2   CIMARRON 45  
BONNER 2   BURLINGTON 9   CAPRICORN 1   CINCO 11  
BONOIL 1   BURNAM 1   CAPRINA 5   CIRCLE 20  
BOONE 3   BURNELL 7   CAR-LOID 1   CIRCLE 7 OIL & GAS 2  
BOOTH & HOLMAN 4   BURNETT 55   CARAWAY 5   CIRCLE W 6  
BOOTHE 1   BURNS 217   CARBIDE 2   CIRRUS 2  
BOPCO 2   BURR 8   CARBONIT 1   CITADEL 2  
BORDER 51   BURR & CREWS 1   CARDEN 1   CITATION OIL & GAS 12  
BOREN 3   BURROW 3   CARDOIL 1   CITEX 1  
BORNEFELD 1   BURSON 2   CAREY 13   CITIES PROD. 2  
BORSODI 4   BURTON 24   CARIBBEAN 22   CITIES SERVICE 423  
BOSS EXPLORATION 2   BUSBY 4   CARIBOU 4   CITY OF JOURDANTON WATER BOARD 1  
BOSTEX 2   BUSCHMAN 2   CARL 65   CITY PRODUCTS 1  
BOSTON 11   BUSMORE 14   CARLANDA 10   CLA-BAR OIL 6  
BOTTOMS 1   BUTCHER 34   CARLEE 2   CLAN 1  
BOUNDS 1   BUTLER 74   CARLESS 4   CLANTON 3  
BOUNTY 20   BUTT 8   CARLON 12   CLARDY 18  
BOURNE 2   BUTTERCUP 1   CARLOS 4   CLARDY & BARNETT 1  
BOW 3   BUTTES 37   CARLSON 16   CLARK 247  
BOWDEN 1   BUTTRAM 2   CARLTON 3   CLARKSON 2  
BOWEN 4   BUZZINI 14   CARNES 18   CLARKWOOD 2  
BOWLES 22   BYARS 8   CAROLINA 2   CLARY 1  
BOWLING 2   BYER 1   CAROLINA-TEXAS 2   CLAY 7  
BOWMAN 4   BYRD 11   CARPENTER 3   CLAYTON 5  
BOWMAN CATTLE 14   BYS INCORPORATED 1   CARR 227   CLEAR FORK 2  
BOYCE 7   C & E 170   CARRIE 1   CLEARY 22  
BOYD & DURST 3   C & J 1   CARRILLO 1   CLEGG 14  
BOYD & GALT 1   C & K 46   CARRIZO 46   CLEMCO 17  
BOYKIN 59   C & M 1   CARRL 224   CLEMENTS 10  
BOYLE 73   C & R 1   CARROLL 1   CLEVA 2  
BOYSEN 34   C A G 7   CARTER 321   CLEVELAND 8  
BRACHMAN 1   C B & S 43   CARTHAY 22   CLEVENGER 11  
BRACKEN 3   C B ENERGY 6   CARTTER 1   CLIFFS DRILLING 1  
BRADBURY 1   C B GATHERING 4   CARTWRIGHT 5   CLIFFWOOD 1  
BRADCO 19   C C LEASEHOLD 1   CASA GRANDE 2   CLIMAX 3  
BRADEX 1   C C M G 1   CASCADE 3   CLINE 6  
BRADFORD 5   C C OPERATING 2   CASCO 1   CLINTON 48  
BRADLEY 1   C D CONSULTING 3   CASE-POMEROY 1   CLIPPER 1  
BRADSHAW 2   C D E 3   CASEY 4   CLOPTON 16  
BRADSTREET 1   C D RESOURCES 12   CASH 5   CLOUD 1  
BRADY 4   C E T 3   CASHCO 17   CLOVER 79  
BRAHANEY 2   C G V 4   CASHION 9   CLUCK 3  
BRAHMAN 8   C H & M 2   CASKEY 10   CLYMORE 20  
BRALORNE 1   C H F 1   CASKIDS 8   COALINGA 2  
BRAMAN 66   C J D 2   CASTLE 4   COAST CO. 18  
BRAMMER 15   C L F 1   CASTLEMAN 1   COASTAL BEND DRILLING 1  
BRANDON 8   C M & M 1   CATAHOULA 4   COASTAL BEND OIL 17  
BRANHAM 15   C M & W 1   CATARINA 3   COASTAL DRILLING & WORKOVER 5  
BRANN 1   C M C 6   CATER 2   COASTAL ENGINEERING 3  
BRANNON 3   C M L 1   CATHY 3   COASTAL EXPLORATION 2  
BRANSON 1   C M OIL 4   CATLETT 90   COASTAL GULF 1  
BRASADA 1   C M S 1   CATTLE LAND 56   COASTAL OIL & GAS 296  
BRASFIELD 1   C N 1   CAUBLE 11   COASTAL OIL & LAND 10  
BRAUER 6   C N G 15   CAVALIER 2   COASTAL PLAINS 5  
BRAUN 21   C N R 4   CAVALLA 14   COASTAL PRODUCTION 6  
BRAVADO 1   C P C 73   CAWTHON 3   COASTAL REFINERIES 102  
BRAWLEY 1   C P C DALE OPERATING 2   CAYMAN 10   COASTAL STATES 521  
BRAYERS 1   C P X 25   CAYUGA 5   COASTAL TEX 1  
BRAYTON 89   C R A 5   CAZA OPERATING 1   COASTAL TREND 66  
BRAZELL 5   C R B 24   CE-BETH 3   COASTAL WELL SERVICE 1  
BRAZOS 220   C R L 1   CEDAR HILL 1   COASTLAND 1  
BRAZOS OIL & GAS 19   C R M 2   CELERON 4   COASTLINE 69  
BREGMAN 2   C S A 9   CELTIC 1   COATES 275  
BREHM INVESTMENT 1   C S X 2   CENERGY 18   COATS 3  
BRELSFORD 2   C T OIL & GAS 1   CENIZA 32   COBBS 1  
BRENAN 4   C T R 3   CENTAUR 3   COBRA 29  
BRENNAN 2   C X Y ENERGY 3   CENTENNIAL 28   COCHRAN 40  
BRENT 2   C-AIR 2   CENTEX 3   COCKBURN 62  
BREUER 34   C-K RESOURCES 7   CENTRAL 34   COCKRELL 108  
BREWER 5   C-TECHNOLOGY 2   CENTURA 19   CODY 98  
BREWSTER 33   CABEZA 1   CENTURION 2   COE 1  
BRIAN 1   CABILDO 2   CENTURY 73   COFFEE 79  
BRIDAS 1   CABLE 1   CENZIA 1   COFFEY 11  
BRIDEWELL 31   CABOT 90   CERRO DE PASCO 11   COFFIELD 10  
BRIDGE 55   CABRE 1   CHABTEX 1   COFFMAN 25  
BRIDGER 7   CACHARA 4   CHALLENGE 5   COGGINS 1  
BRIDWELL 473   CACTUS 6   CHAMBERLAIN 13   COGSWELL 1  
BRIGGS 2   CADDO 124   CHAMBERS 24    
BRIGHAM 59   CAESAR 2   CHAMBLISS 1    
BRIGHT 208   CAFRE 3   CHAMPION 3    
BRILL 10   CAGE 8   CHAMPLIN 386    
BRINKERHOFF 8   CAIN 26   CHANCE 3    
Operator Count   Operator Count   Operator Count   Operator Count  
COHEN 5   CROCKETT 7   DELHI 62   DYONISIO 1  
COHO 5   CRON 24   DELHI-TAYLOR 130   E & H 4  
COKE 1   CROOM 1   DELK 1   E & L 1  
COKER 1   CROSBY, A. W. 4   DELKER 14   E C C 3  
COKINOS 1   CROSS TIMBERS 1   DELLINGER 25   E E X 18  
COLBY 2   CROUCH 52   DELLWOOD 15   E K O 12  
COLE 62   CROW 7   DELRAY 74   E M J 1  
COLEMAN 2   CROWE 1   DELTA AMERICAN 25   E O G RESOURCES 196  
COLETTO CREEK 1   CROWELL 1   DELTA BRAVO 1   E P OPERATING 49  
COLGIN 1   CROWN 17   DELTA DRILLING 7   E R I 11  
COLINE OIL 1   CROWN CENTRAL 110   DELTA EXPLORATION 1   E S B E 1  
COLLIER 17   CRUDE OIL 1   DELTA GULF 24   E-COR 3  
COLLINS 42   CRUMP 3   DELTA PETROLEUM 1   E-G JOINT VENTURE 6  
COLLOM 1   CRUTCHER 1   DELTA US 1   EADS 20  
COLO 1   CRUTCHFIELD 1   DENALI 5   EAGLE 28  
COLOBRI 2   CRUX 3   DENISON 1   EAGLEFORD HUNTER RESOURCES 1  
COLOGNE 37   CRYSTAL 41   DENMAN 6   EARTH SCIENCES 6  
COLOMA 56   CUATRO 1   DENNIS 9   EASON 9  
COLONIAL 2   CUDE 21   DENOVO 4   EAST SIDE 2  
COLONNADE 1   CUELLAR 11   DENTLER 1   EAST WEST INVESTMENT 1  
COLORADO 57   CUERO 1   DENTON 1   EASTERN ENERGY 1  
COLSON 2   CULLEN 29   DENVER AMERICAN 3   EASTERN GAS 12  
COLT 2   CULLINAN 5   DEROSSETT 5   EASTERN OIL 2  
COLTON 30   CULOCO 1   DESANA 1   EASTERN STATES 6  
COLUMBIA 46   CULTON 16   DESCO 1   EASTERN TEXAS 3  
COLUMBIAN 3   CULVER 1   DEVEX 1   EASTERWOOD 21  
COLUMBUS 38   CUMEX 2   DEVINE 5   EATON 7  
COLVIN 4   CUMMINGS 9   DEVON 50   EBERT 2  
COMANCHE 17   CUMMINS 74   DEVONIAN 3   ECA HOLDINGS 1  
COMBINED AMERICA 1   CUMMINS & WALKER 134   DEWALT 3   ECHO 1  
COMBINED PRODUCING 1   CUNNINGHAM 45   DEWBRE 119   ECHOLS 51  
COMBUSTION PRODUCTS 7   CURRAN 1   DEWITT OIL & GAS 3   ECKERT 7  
COMCO-CENTURION 1   CURREY 3   DIADEM 1   ECKOLS 2  
COMETRA 22   CURRY 6   DIAMEX 8   ECLETO 1  
COMMERCE 2   CUSACK 1   DIAMOND 42   EDCO 9  
COMMERCIAL 53   CUTBIRTH 17   DIAMOND HALF 1   EDDY 35  
COMMONWEALTH 14   CXY ENERGY 1   DIAMOND SHAMROCK 4   EDEN OIL 2  
COMPASS 2   CYCLOPS 2   DIASU 3   EDGAR 13  
COMPLETE OIL 4   CYPRESS E & P 4   DICE 2   EDGE 123  
COMSTOCK 23   CYPRUS 24   DICK 39   EDGE PETROLEUM 2  
CON-TEX OIL 1   CZAR 11   DICKSON 1   EDINBURG 1  
CONCHO 11   D & D 9   DIETERT 3   EDISTO 1  
CONCORD 13   D & G 54   DIFFERENTIAL 1   EDMISTON 4  
CONDRY 2   D & M 1   DILLARD 27   EDMONT 1  
CONE 1   D A R T 3   DILLEY 45   EDWARDS 71  
CONES 3   D B O 5   DILLON 69   EGAN 36  
CONFEDERATE 10   D C B OIL & GAS 1   DINERO 126   EHMAN 1  
CONLEY 3   D D D ENERGY 1   DINN 1   EI-FEL 1  
CONN 1   D D G 31   DIRKS 104   EICHER 6  
CONNER 1   D D OIL 1   DIRNETT 2   EILAND 1  
CONOCO 378   D J EXPLORATION 1   DISCORBIS 47   EKO 1  
CONQUEST 20   D K D 4   DISCOVERY 24   EL CAMINO 1  
CONROE 77   D K G 11   DISHMAN 3   EL CHORRO 3  
CONROY 1   D L B 1   DIVERSA 12   EL DORADO 26  
CONSERVATIVE OIL 16   D M C 1   DIXEL 15   EL INDIO 1  
CONSOLIDATED 131   D M L 4   DIXIE 19   EL PASO 168  
CONSTANTIN 1   D R S 4   DIXILYN 2   EL REGALO 3  
CONTINENTAL 1408   D S M OIL 2   DIXON 30   EL REY PETROLEUM 2  
CONTINENTAL TREND RESOURCES 14   D V OIL 1   DOBBINS 3   EL RIO 1  
CONTRACT ENERGY 1   D Y EXPLORATION 4   DODGEN 1   EL-TEX 3  
CONVEST 77   D'UNGER 5   DOHERTY 1   ELAM 2  
CONWAY 4   DABNEY 1   DOLCH 10   ELAND 1  
COOK 18   DADE 1   DOLPHIN 2   ELEANOR OIL 1  
COOKE 2   DAHCO 1   DOME 1   ELECTROSEIS 2  
COOLEY 1   DAIGEL 1   DOMESTIC FUELS 1   ELECTROTHERMIC 9  
COON 13   DAKAMONT 7   DOMINION 84   ELF AQUITAINE 4  
COON-MURPHY 1   DAL-LONG 6   DONICO 5   ELINOR OIL 1  
COONRAD 5   DALE 53   DONKIN 2   ELLEDGE 2  
COOPER 7   DALECO 24   DONZIS 2   ELLIOTT 12  
COPANO 25   DALEX 3   DOOLEY 1   ELLISON 2  
COPETCO 3   DALLAS 10   DORADO 1   ELLOCO 1  
COQUAT 132   DALPORT 23   DORAN 49   ELLSTROM 1  
COQUINA 21   DAMSON 41   DORCHESTER 33   ELLSWORTH 111  
CORAL 12   DANCIGER 29   DORFMAN 1   ELMAX 1  
CORDA 1   DANCO 1   DORRANCE 9   ELMER 1  
CORDELE 18   DANE 2   DORRIS 3   ELMONT 1  
CORDELL 2   DANIEL 18   DOSS 2   ELMS 3  
CORDER 1   DANIELS 3   DOUBLE EAGLE 36   ELTOBILT 1  
CORDER, KNOX 3   DANIELSON 6   DOUBLE J 2   ELWOOD 1  
CORE EXPLORATION 3   DANMOR 1   DOUBLE PLAY 18   ELY 2  
CORENERGY 9   DANOIL 3   DOUBLE S 1   EMINENT 2  
CORGEY 38   DANREY 5   DOUBLE U 30   EMPIRE 5  
CORKILL 1   DANSFIELL 28   DOUGHERTY 109   EMRY 1  
CORLEY 17   DANT 2   DOUGHTY 45   ENCANA 1  
CORNELIUS 1   DANTEX 11   DOUGLAS 123   ENCINO 20  
CORNELL 3   DANZIGER 1   DOVRE 2   ENCINO ENERGY 1  
CORNERSTONE 2   DARBY 14   DOW CHEMICALS 125   ENCO EXPLORATION 84  
CORNING 7   DARCY 3   DOWNEY 1   ENCON 5  
CORONADO 72   DARNER 11   DOWNING 12   ENDEAVOR 1  
CORPENING 15   DARROH 2   DOYLE 5   ENDEAVOUR 6  
CORPUS CHRISTI CORPORATION 13   DARSEY 8   DOYNO 2   ENDERLI 1  
CORPUS CHRISTI DRILLING 1   DASA 13   DR. MC 1   ENDICOTT 3  
CORPUS CHRISTI EXPLORATION 5   DASBECK 1   DR. PEPPER BOTTLING CO. 1   ENDREX 4  
CORPUS CHRISTI LEASEHOLDS 13   DASH 9   DRAKE 5   ENDURING 1  
CORPUS CHRISTI MANAGEMENT 43   DASKAM 2   DRAPER 14   ENDURO 1  
CORPUS CHRISTI OIL & GAS 180   DAUBERT 197   DREXEL 9   ENERCO 4  
CORPUS CHRISTI REFINING 5   DAUBES 2   DREYFUS 2   ENERCORP 2  
CORRON 1   DAUCHY 50   DRILLCO 3   ENERGETICS 56  
CORRUM 1   DAUGHERTY 7   DRILLERS ENERGY 37   ENERGEX 2  
CORSICANA 1   DAUNTLAS 2   DRILLING & EXPLORATION 40   ENERGO 1  
CORUM 32   DAVACO 1   DRILLMAR 1   ENERGY 44  
CORY 2   DAVENPORT 36   DRISCOLL 32   ENERGY DEVELOPMENT 86  
CORZELIUS 2   DAVES 1   DRIVER 3   ENERGY ENTERPRISES 6  
COSDEN PETROLEUM 28   DAVIDOR 20   DRYER 1   ENERGY EQUITY 1  
COSEKA 1   DAVIDSON 15   DUAL 1   ENERGY EXPLORATION 1  
COSMO 6   DAVIE 1   DUDLEY 1   ENERGY HUNTER 1  
COSNER 11   DAVIES 1   DUER-WAGNER 2   ENERGY INTERNATIONAL 4  
COSTA 4   DAVIS 377   DUFF 1   ENERGY INVESTMENTS 6  
COSTILLA 19   DAVMOR 1   DUGGER 68   ENERGY PROJECTS 2  
COTTON 104   DAVOIL 1   DUKE 2   ENERGY RESERVES GROUP 26  
COTTONWOOD 33   DAWSON 52   DULANEY 124   ENERGY RESOURCES 9  
COUCH 4   DAY 1   DULCE OIL 3   ENERGY SEARCH 3  
COUGAR 6   DAYVAULT 1   DULUP 17   ENERGY SOURCES 7  
COWAN 1   DE SHANE 1   DUNBAR 5   ENERGY TREATING 1  
COWANCO 6   DEAN 16   DUNCAN 18   ENERGY UNLIMITED 5  
COWELL 1   DeARMON 1   DUNHAM 4   ENERQUEST 9  
COX 899   DEBROW 1   DUNHILL 3   ENEX 2  
COYLE 10   DECKER 31   DUNLAP 23   ENEXCO 5  
COYOTE TRUST 1   DECLEVA 6   DUNN 3   ENGELKE 93  
CRAIG 3   DEEP ROCK 34   DUNNAM 2   ENGEO 83  
CRANFILL 2   DEEP SOUTH 6   DUNWOODY 16   ENGLAND 1  
CRAWFORD 18   DEERING 1   DUPONT 3   ENGLE 1  
CREDO 1   DEETER 20   DUQUESNE 1   ENGLISH 1  
CREECH 1   DeGRAZIER 2   DURANGO 2   ENHANCED ENERGY 1  
CREEK OIL 1   DeGUIRE 8   DURBIN BOND 9   ENI EXPLORATION 2  
CREIGHTON 3   DEICO 1   DURBIN OIL 2   ENRE 22  
CRESCENT 30   DEKALB ENERGY 9   DURHAM 2   ENRON 390  
CRESLENN 6   DEL MAR 23   DURST 8   ENSCO 1  
CREST 37   DEL PETROLEUM 6   DUTY TOOL 3   ENSEARCH 1  
CREST ENERGY 1   DELANEY 1   DUVACO 1   ENSERCH 54  
CRESTMONT 1   DELANGE 268   DUVAL COUNTY RANCH CO. 66   ENSIGN 1  
CREWS 20   DELANO 1   DUVAL OIL 45    
CRICKET 4   DELAWARE 3   DUVAL PRODUCTION 11    
CRIMSON 4   DELCAR 13   DYAD 1    
CRIPPLE CREEK 2   DELEE 2   DYCO 2    
CROCKET 1   DELFERN 2   DYNAMIC 77    
Operator Count   Operator Count   Operator Count   Operator Count  
ENSOURCE 1   FINLEY 12   GAGE 1   GLOVER 1  
ENSTAR 10   FINNEY 4   GAINCO 12   GLYNN-THOMPSON 1  
ENTERPRISE 28   FIRST ARANSAS 1   GAINES 10   GO ENERGY 3  
ENTERPRISES 2   FIRST ENERGY 11   GAITHER 11   GO OIL 1  
ENTEX 19   FIRST MATAGORDA 5   GALATIA 2   GO-ENERGY 1  
ENTRUST 1   FIRST OIL 1   GALAXY 173   GO-ENERGY 3  
EPPLER 1   FIRST ROCK 7   GALLAHER 7   GO-TEX 8  
EQUINOX 1   FIRST UNITED 2   GALLO DE CRISTAL 1   GODBOUT 1  
EQUITABLE 12   FIRSTRIKE ENERGY 11   GALLOWAY 1   GODSEY 11  
EQUITX 7   FISCHER 79   GALO ENERGY 6   GOERNER 1  
EQUITY 7   FISH 5   GALT 1   GOETZ 8  
ERIN SOUTHWEST 1   FISHER 24   GALVEZ 1   GOFORTH 2  
ERNEST 5   FISHER-WEBB 25   GAMBLE 6   GOHLKE 3  
ERSKINE 22   FITE 1   GAMMA RESOURCES 3   GOHLKE-BENGE 1  
ERWIN 1   FITTIPALDO 1   GAMMETER 1   GOLDEN 40  
ESCOBA 1   FITZGERALD 9   GAR 4   GOLDING 3  
ESCONDIDO 5   FITZPATRICK 67   GAR-FLO 1   GOLDKING 244  
ESENJAY 330   FIVE RESOURCES 6   GARCIA 1   GOLDMAN 1  
ESGEN 2   FLAG-REDFERN 24   GARDESCU 1   GOLDRUS 23  
ESPADA 4   FLAITZ 59   GARDNER 36   GOLDSMITH 6  
ESPERANZA 6   FLAMINGO 13   GARLAND 2   GOLDSTON 243  
ESTES 2   FLANAGAN 2   GARLITZ 4   GOLDSTRAND 1  
ESUNAS 5   FLARE 2   GARNER 1   GOLIAD 34  
ESVES 1   FLASKE 1   GARNETT 6   GOLSON 1  
ETHREDGE 2   FLEET 2   GARR 2   GOMA 2  
ETHYL 13   FLEMING 1   GARRETT 8   GOOD DAY 8  
ETOCO 12   FLETCHER 7   GARRISON 12   GOOD HOPE 147  
EUBANK 4   FLO-TEX 1   GARVEY 8   GOODALE 22  
EUBANKS 3   FLOBOOTS 4   GARVIN 1   GOODELL 4  
EUGENE 9   FLORENCE 3   GARY 1   GOODHUE 1  
EURA B. OIL 1   FLORIDA 24   GAS 2   GOODRICH 14  
EURATEX 2   FLOUR BLUFF 2   GAS PRODUCING ENTERPRISES 55   GOODWIN 1  
EUREKA 1   FLOURNOY 232   GAS ROCK 5   GORDEN 1  
EURO 1   FLOWERS 23   GASAWAY 1   GORDON 12  
EUROPEAN 20   FLOYD 2   GASOLINE PRODUCTION 126   GORMAN 330  
EVANS 56   FLUSS 1   GASPAR RICE 2   GORUM 6  
EVCO 7   FLY 70   GASPER RICE 35   GOSE 143  
EVERBRIGHT 8   FLYING DIAMOND 2   GASROCK 3   GOTTLIEB 2  
EVEREST 100   FLYING W 1   GASTEX 1   GOUGER 11  
EVERGREEN 23   FLYNN 19   GASTRANS 6   GOULD 1  
EVERS 1   FOHS 13   GATES 2   GOVERNMENT WELLS 24  
EVERSOLE 1   FOHS & FOHS 1   GATHINGS 36   GRABOWSKI 5  
EWING 4   FOLWELL 3   GATO 2   GRACE 72  
EXCELSIOR 6   FONTANA 10   GAUNTT 3   GRACEY 1  
EXETER OIL 17   FORAN 3   GAUTREAUX 1   GRAGG 2  
EXP 1   FORBES 2   GAYLE 1   GRAHAM 382  
EXPANDO 67   FORCE 4 ENERGY 1   GEDDIE 4   GRAMAC 1  
EXPEX 1   FORCENERGY 2   GEE 1   GRAMMAR 1  
EXPLORATION 32   FORD 121   GEER 2   GRANDE 13  
EXPLORATION DRILLING 1   FOREE 4   GEIER-JACKSON 2   GRANDIN 1  
EXPLORATION INVESTMENTS 1   FORES 1   GEISE 3   GRANITE 4  
EXPLORATION, LTD 1   FOREST 381   GEISELMAN 15   GRANT 7  
EXPLORECO ENERGY 2   FORESTER 5   GEISER 54   GRARIDGE 22  
EXPLORER 1   FORETICH 1   GEM 8   GRASTY 2  
EXPORT 10   FORGOTSON 1   GEMACA 1   GRAVIS 59  
EXPRESS 3   FORMAN 2   GEMARMI 3   GRAWARD 1  
EXPRO 1   FORNEY 244   GEMINI 9   GRAY 39  
EXSUN 32   FORT APACHE 1   GENERAL AMERICAN OIL 18   GRAY WOLFE 2  
EXTEX 1   FORT BEND 16   GENERAL ATLANTIC 1   GRAYBURG 6  
EXXETER PETROLEUM 21   FORT WORTH 1   GENERAL CRUDE 261   GREAT BASINS 13  
EXXON 2166   FORTENBERRY 6   GENERAL PETROLEUM 2   GREAT EXPECTATION 2  
EZZELL 14   FORTRESS MINERALS 4   GENERAL PROD. 7   GREAT LAKES 29  
F & B ENERGY 2   FORTSON 1   GENERAL WELL 3   GREAT NATIONAL 1  
F C D 3   FORTUNE 1   GENESIS 137   GREAT PLAINS 6  
F F A 2   FOSS 2   GEO ENERGY 5   GREAT SOUTHERN 2  
F G B 2   FOSSIL BAY 5   GEO EXPLORATION 3   GREAT SOUTHWEST 1  
F-W OIL 1   FOSSIL EXPLORATION 19   GEO FOCUS 1   GREAT SOUTHWESTERN 1  
FAGAN 5   FOSTER 15   GEO NATURAL 2   GREAT STATES 3  
FAGIN 1   FOUCH 1   GEO-REEF 2   GREAT TEXAS 5  
FAIN 9   FOUNDATION OIL 2   GEO-SOURCE 1   GREAT TEXAS CRUDE 24  
FAIR 199   FOUNTAIN 8   GEOCHEMICAL 66   GREAT WEST PET. 3  
FAIRVIEW 1   FOUR STAR 1   GEODE 4   GREAT WESTERN 15  
FAIRWAY 9   FOUR-B TRUST 31   GEODOMINION PETROLEUM 43   GREATHOUSE 2  
FAITH 1   FOURTEEN-HUNDRED CORPORATION 1   GEODYNAMICS 72   GREBIN 1  
FALCO 2   FOWELL 1   GEOGRAPHIC 1   GREEHEY 3  
FALCON 57   FOWLER 1   GEOLOGICAL RESEARCH 21   GREEN 11  
FALCONE 1   FOX 76   GEONATURAL RESOURCES 8   GREENBRIAR 1  
FALLEY 5   FOXBOROUGH 1   GEOPHYSICAL 10   GREENBRIER 59  
FALLS 1   FRANCIS 5   GEORGE 8   GREENHILL 5  
FALLS CITY 1   FRANCITAS 13   GEOSEARCH 5   GREENWOOD 2  
FAMCOR 10   FRANK 1   GEOSOUTHERN 7   GREER 8  
FANCHER 3   FRANKE 2   GEOTEK 1   GREGG 50  
FANION 2   FRANKEL 14   GERALD 2   GRELLING 16  
FANSLER 1   FRANKFORT 15   GERKER 1   GRETA 6  
FANT 1   FRANKLIN 26   GERMANY 1   GREY WOLF 6  
FAR 3   FRANKS 1   GERNER 1   GRIFFIN 5  
FAR WEST 3   FRANZ 3   GERODETTI 1   GRIFFITH 7  
FARAGSON 1   FRASER 7   GERONIMO 40   GRIMES 13  
FARENTHOLD 33   FRAZER 2   GERTEX 1   GRIMM 6  
FARGASON 6   FRAZIER 76   GES 5   GRISHAM 1  
FARGO 34   FREDONIA 2   GETTY 265   GRISINGER 1  
FARISH 3   FREEDMAN 11   GIBLIN 1   GROFF 1  
FARMERS 1   FREEMAN 48   GIBRALTAR 17   GROUP 9  
FARMOR 2   FREEPORT 1   GIBSON 21   GROVER 2  
FARNEY 1   FREER 3   GIDDENS 1   GROVER-MCKINNEY 1  
FARNSWORTH 3   FREMONT 10   GIDEON 2   GRUBB 48  
FARROW 1   FRENCH OIL 28   GIEBEL 2   GRUBBS 1  
FARSON 1   FRENCH, L.D. 1   GIERHART 38   GRUBSTAKE 1  
FASELER 1   FRESNO 1   GIFFORD 8   GRUSS 2  
FASKEN 8   FRIDAY 5   GILBERT 1   GRUY 18  
FASSY 1   FRIO 115   GILBREATH 2   GUADALUPE 21  
FAULK 3   FRIO-TEX 65   GILCHRIST 1   GUARANTY 3  
FAYE 1   FROHNHOEFER 8   GILCREASE 85   GUARDIAN 25  
FAYETTE COUNTY 4   FRONTIER PETROLEUM 17   GILGER 12   GUENTHER 2  
FEAGIN 3   FROST 62   GILL 30   GUERNSEY 20  
FEAZEL 1   FRYER 1   GILLAND 1   GUEST 4  
FECH 1   FULK 2   GILLESPIE 39   GUFFEY 3  
FEDERAL INDUSTRIES 1   FULLER 55   GILLEY 1   GUIBERSON 2  
FEDERAL OIL 1   FULLERTON 5   GILLIAM 1   GUILBAULT 1  
FEDERAL ROYALTY 13   FULTON 4   GILLILAND 1   GUINN 2  
FEE OIL & GAS 1   FUNDAMENTAL OIL 3   GILLOCK 1   GULF AMERICAN 16  
FEHLHABER 1   FURNELL 1   GILLRING 107   GULF BOARD OIL 22  
FELAND 3   FURSE 1   GILMORE 1   GULF CANADA 4  
FELDERHOFF 7   FUSON 1   GILSTER 2   GULF COAST 140  
FELDMAN 20   FUTCH 1   GINCO 4   GULF ENERGY 93  
FELMONT 10   FUTURE EXPLORATION 10   GINGER 3   GULF INTERSTATE 11  
FELTNER 5   FUTURE PETROLEUM 4   GINTHER 168   GULF LAKES 1  
FENDER 8   G & H 2   GISSEL 1   GULF MINERALS 37  
FENN 16   G & M 3   GIST 2   GULF OIL 711  
FENNER 1   G & P 5   GIVENS 1   GULF PLAINS 29  
FENSTERMAKER 1   G & S 1   GLACIER 85   GULF PROD. 7  
FERGUSON 61   G A P 5   GLASCO 2   GULF RESOURCES 3  
FERRIER 4   G A S 11   GLASS 1   GULF SANDS 127  
FIDELITY 112   G C E A 5   GLASSCOCK 357   GULF SOUTH 12  
FIELD 9   G D ENERGY 1   GLASSEL 3   GULF STATES 52  
FIELD DRILLING 2   G D K 3   GLAZIER 1   GULF STREAM 12  
FIELDS 13   G E C 3   GLENCO 14   GULF TIDE 1  
FIFTEEN 2   G H J 4   GLENDA 11   GULFBOARD 2  
FIFTH ANDREWS 1   G H R 50   GLENN 22   GULFCO 1  
FIKES 3   G L G ENERGY 9   GLENN & ASSOCIATES 5   GULFPORT 2  
FILON 12   G M T 1   GLENNCO 5   GULFSHORE 18  
FINA 124   G S I 2   GLENORA 4    
FINCH 2   G W R 2   GLENWAR 2    
FINDER 1   GABRIEL 2   GLO CO. 1    
FINE 1   GAEA 1   GLOBAL 8    
FINGER 23   GAELIC 2   GLOBE OPERATING CO. 8    
Operator Count   Operator Count   Operator Count   Operator Count  
GULFSIDE 1   HAWORTH 2   HOPE HILL 1   INTERNATIONAL 12  
GULFSTAR 22   HAWTHORN 15   HOPE PRODUCTION 1   INTERNATIONAL NUCLEAR 14  
GULFSTREAM 25   HAWTHORNE 6   HOPEHILL 7   INTERNATIONAL OIL & GAS 14  
GULFTON OIL 1   HAYDEN 11   HOPF 1   INTERNATIONAL WESTERN 3  
GUM HOLLOW 1   HAYES 10   HOPI 3   INTERSTATE MINERALS 10  
GURLEY 1   HAYNES 84   HOPPER 1   INTEX 6  
GUTHRIE 3   HAYNESWORTH 1   HOPSON 10   INTRAMERICAN 11  
GUTIERREZ 11   HAYPEC 7   HORIZON 5   INTREPID 6  
GYPSY 1   HAYS 20   HORMACHEA 1   INVESTEX 1  
H & H 3   HAZEL 2   HORN 100   INVESTMENT VENTURES 3  
H & H DEVELOPMENT 1   HAZELETT 4   HORNADAY 2   INVESTORS NATURAL GAS 1  
H & H DRILLING 2   HAZLITT 1   HORNBECK 2   INVESTORS SYNDICATE OF SOUTHWEST 8  
H & J DRILLING 263   HEAD 6   HORNBERGER 5   INVINCIBLE 1  
H & M 4   HEAD & WELSH 34   HORNE 3   IOWA-PAYNE 1  
H & N 2   HEADINGTON 57   HORNER 2   IRBY 3  
H & R 1   HEADWATERS 2   HORNSBY 1   IRENE 4  
H & S 10   HEARD 27   HORRIGAN 4   IRISH OIL 8  
H & W 7   HEARTLAND 4   HORSTING 3   IRVING 7  
H A J J 7   HEBERT 5   HORTON 2   IRWIN 9  
H C M 2   HECAR 1   HORVATH MILLS 1   ISBELL 1  
H C W 3   HEDGE 23   HOSKINS 15   IVEY TERRY 1  
H D & H 4   HEDLEY 11   HOTCHKIN 19   IVY 3  
H D C 1   HEDRICK 5   HOU-TEX 16   J & C 59  
H E & D 1   HEEMANN 1   HOUCHINS 1   J & D 2  
H E A 1   HEEP OIL 167   HOUGEN 1   J & E 1  
H E C I 13   HEID 7   HOUGH 7   J & J 1  
H G I 3   HEINZE 2   HOUSE 1   J & M WELL SERVICE 14  
H L B 1   HELDENFELS 14   HOUSER 27   J & W OIL 1  
H M C 1   HELIS 6   HOUSH 29   J A H 72  
H M S 5   HELLAND 37   HOUSTON 11   J B H 1  
H N G 188   HELMERICH 7   HOUSTON DOMESTIC 4   J B OIL & GAS 1  
H O R 1   HELVETIA 2   HOUSTON DRILLING 4   J F D 3  
H P R 1   HEMINGWAY 10   HOUSTON ENERGY 3   J H 1  
H R B OIL 2   HEMPHILL 1   HOUSTON EXPLORATION 43   J H I 1  
H R H 3   HENDERSON 24   HOUSTON GULF 53   J I L 5  
H S RESOURCES 4   HENDRICKSON 2   HOUSTON INDEPENDENT 1   J J 1  
H T H 1   HENNA 1   HOUSTON MINERAL 10   J J R S 1  
H V DRILLING 1   HENNIG 4   HOUSTON NATURAL GAS 113   J L RESOURCES 2  
H-M OIL 156   HENNINGER 1   HOUSTON OIL 417   J M C RESOURCES 2  
HAAS 205   HENRY 30   HOUSTON OIL & MINERALS 128   J M G FINANCIAL 1  
HABER 24   HENSCH 2   HOUSTON OIL FIELDS 6   J M M ENERGY 3  
HABERLE 2   HENSHAW 145   HOUSTON OIL WELL SERVICE 7   J O C OIL 1  
HADA 80   HENSON 5   HOUSTON OPERATING 3   J R B 1  
HADEN 2   HERCULES 8   HOUSTON PETROLEUM 24   J R G 24  
HAGAN 6   HERD 2   HOUSTON ROYALTY 33   J R OIL & GAS 1  
HAGEN 40   HERITAGE 14   HOWARD 40   J S & P OPERATING 1  
HAGEN-GREENBRIAR 1   HERLION 7   HOWELL 715   J S PETROLEUM 2  
HAGENS 11   HERNDEN 3   HOWETH 154   J T R 3  
HAGGARD 1   HERNDON 16   HOXSEY 12   J W P EXPLORATION 2  
HAGGARTY 1   HERRING 28   HRBUTZ 1   J W R 12  
HAIL 5   HERRINGTON 8   HUB CITY 1   J-3 OIL 53  
HAILEY 14   HERRMANN 1   HUBBARD 4   J-O'B OPERATING 5  
HAJECATE 3   HERSCHAP 7   HUBBLE 10   J-W 41  
HALAMICEK 6   HERSCHBERGER 1   HUBCO 2   J-WIL 2  
HALBOUTY 146   HERTON 1   HUBER 94   J.A.H 1  
HALL 4   HERZSTEIN 1   HUBER, J.H. 1   JACKSON 22  
HALL-HOUSTON 9   HESTER 11   HUBER, J.M. 9   JACOB 1  
HALLIBURTON 7   HETCO 6   HUDDLE 10   JACOBS 14  
HALLMARK 5   HEWIT & DOUGHERTY 281   HUDGENS 4   JAD OIL 2  
HALLS CREEK 1   HEWITT 49   HUDGINS 13   JADE 6  
HALLWOOD 5   HEYNE 1   HUDSON 22   JAMES ENERGY 1  
HAMBLEN 1   HEYSER 9   HUENERS 1   JAMESON 2  
HAMBY 2   HIAWATHA 230   HUFF 2   JAMEX 53  
HAMCO 3   HIAWATHA(HOLLIDAY) 2   HUFFCO 23   JAMIN 15  
HAMILL 213   HIBBERT 18   HUFFINGTON 21   JANAN 10  
HAMILTON 91   HIBERNIA 1   HUFFMAN 1   JANCO 2  
HAMM 6   HICKEY 1   HUGHES 903   JANE OIL 1  
HAMMAN 141   HICKOK 30   HUGHEY 6   JANEX 2  
HAMMAX 1   HICKS 10   HUISACHE 109   JARBE 1  
HAMMER 2   HIDALGO 3   HULSEY 5   JARMAN 1  
HAMMONDS 20   HIDALGO-WILLACY 3   HULVER 2   JARMON 1  
HAMON 323   HIGGINS 3   HUMBLE 5510   JARRELL 3  
HAMPTON 3   HIGH ISLAND 6   HUMPHERY 8   JAY-DEE 21  
HANCO OIL & GAS 1   HIGH PLAINS 10   HUMPHREY 1   JAY-LIN 6  
HANCOCK 8   HIGHLAND OIL 77   HUMPHRIES 16   JAYCO 3  
HANCORP 1   HIGHLAND RESOURCES 18   HUNDRED 2   JAYRED 2  
HAND 3   HILBURN 2   HUNE 1   JEDCO 5  
HANEY 1   HILCORP 24   HUNT 491   JEDSCO 1  
HANKAMER 68   HILL 230   HUNT HASSIE EXPL. 1   JEFFERS 1  
HANKEY 5   HILLCREST 26   HUNTER 30   JEFFERSON LAKE 25  
HANNA 1   HILLIARD 56   HUNTINGTON 5   JEFFRIES 1  
HANNAH 2   HILLIER 60   HURBROUGH 8   JENKINS 4  
HANOVER 14   HILLIN 1   HURD 75   JENNEY 3  
HANSLIP 5   HILLMAN 2   HURLBUT 22   JENNINGS 98  
HANSON 392   HILLSMAN 20   HURLEY 4   JERCO 2  
HANTHO-NELSON 1   HILLSMAN-GREENBURG 1   HURT 3   JERGINS 87  
HANTON 1   HILTY 19   HUSKY 23   JERGINS OF TEXAS 5  
HARBERT 1   HIME 1   HUTCHINS 15   JET 7  
HARBOR 1   HINDS 5   HUTSON 1   JETCO 1  
HARDIE 1   HINER 3   HYDEN 3   JETSTREAM 1  
HARDIN 12   HINES 4   HYDRO-CARBONS 11   JETTA 1  
HARDING 18   HINKLE 25   HYDROCARBON EXPLORATION 1   JILPETCO 1  
HARDWICK 29   HINSON 18   HYDROCARBON GATHERING 14   JIMCO 1  
HARDWICKE 10   HINTON 16   HYDROCARBON HORIZONS 9   JOBST 4  
HARDY 1   HISTORICAL 2   HYDROCARBON MGMT. 1   JOCELYN 2  
HARGEST 3   HIXON 2   HYDROCARBON OPERATING 6   JOCELYN-VARN 58  
HARGIS 9   HOBBY 4   HYDROCARBON PROD 2   JOHANSON 2  
HARGRAVE 27   HOBLITTZELLE 1   HYDROCARBON PROD. 17   JOHNSON 114  
HARGROVE 4   HOBLITZELLE 1   HYDROCARBON TRANSMISSION 1   JOHNSTON 30  
HARING 131   HOBSCO 3   HYLAND 1   JOJON 1  
HARKEN 8   HODGE 9   HYNES 15   JOLLEY 1  
HARKINS 591   HODGES 1   HYQUEST 67   JONES 159  
HARLEY 3   HOFFER 5   HYSO 1   JONES CREEK 1  
HARMON 1   HOFFMAN 1   HYTECH 13   JONNELL 25  
HARMONY 5   HOFHEINZ 1   I M C 4   JORDAN 14  
HARPER 43   HOGAN 5   I M E F 1   JOSEY 59  
HARPER HEFTE 44   HOLBERT 1   I O C 8   JOYCE 2  
HARPER, SAM H. 1   HOLBROOK 5   I O G 2   JOYCE & HILTY 16  
HARPER-SMITH 28   HOLCOMB 1   I P PETROLEUM 9   JUANITA 1  
HARRELL 50   HOLDEN 22   I T R 2   JUDARTH 2  
HARRELL & SOUTHWORTH 15   HOLEMAN 1   IBERIA 1   JUDD 3  
HARRINGTON 2   HOLIDAY RESOURCES 13   ICARUS 6   JUPITER 15  
HARRIS 21   HOLLAND 93   IDAHO 3   JUSTISS-WEARS 1  
HARRIS-FUNK 1   HOLLIDAY 7   ILLINOIS PETROLEUM 26   K & A 21  
HARRISON 201   HOLLIMON 56   IMPACT 1   K & H 55  
HARRISON, DAN J., JR. 7   HOLLIS 2   IMPERIAL 15   K & K 2  
HARROB 1   HOLLOWAY 53   INCA 22   K & N 1  
HARROUN 2   HOLLUB 26   INCO 1   K & S 2  
HARRUS 6   HOLLY 68   INDEPENDENCE 2   K B 34  
HART 20   HOLMES 55   INDEPENDENT 22   K C 1  
HARTEX 1   HOLOTIK 2   INDEXGEO 41   K C S 29  
HARTMAN 1   HOLT 2   INDIOLA 2   K D ENERGY 1  
HARVARD 2   HOLTZCLAW 1   INDUSTRIAL 16   K L S 1  
HARVEY 47   HOMA 4   INEXCO OIL 91   K M D 2  
HARWOOD 48   HOMABY 7   INGRAM 1   K O G OPERATING 24  
HASBRO 1   HOME 22   INLAND 39   K O T 1  
HASCHKE 4   HONCHO 8   INLAND EXPLORATION 1   K P EXPLORATION 13  
HASEMAN 1   HONDO 2   INLAND OCEAN 52   K R M 18  
HASSELMAN 1   HONOLULU 1   INLAND PETROLEUM 2   K T X 4  
HAUSER 14   HONOR 1   INMAN 1   K W B 1  
HAVENS 1   HOOD 2   INTEGRAL 100   K-2 1  
HAWK 1   HOOKER 2   INTEGRATED OPERATOR 3    
HAWKEYE 2   HOOKS 2   INTER-ALLIED 1    
HAWKINS 115   HOOPER 3   INTERCOASTAL 30    
HAWLEY 76   HOOVER 39   INTERCONTINENTAL 3    
HAWN 312   HOPE 31   INTERGRATED 1    
Operator Count   Operator Count   Operator Count   Operator Count  
K-N OPERATING 6   KRUEGER 1   LEGEND 6   LYNCO 3  
KA-HUGH 24   KRUIDENIER 1   LEGER 12   LYND 10  
KA-MATT 3   KRUSEN 1   LEHMERTZ 1   LYNDEL 1  
KADANE 2   KRYSTAL-LIN 1   LEMARCO 17   LYNN 8  
KAISER OIL 13   KUBELA 1   LENSGRAF 1   LYNNBROOK 1  
KAISER-FRANCIS 29   KUEBLER 1   LENT 1   LYNTON 1  
KALER ENERGY 69   KUENSTLER 8   LEONA 1   LYNX 5  
KALLIES 1   KUHNS 3   LEONARD 18   LYONS 51  
KALLINA 45   KUMLER 10   LEONE 2   LYTLE CREEK 5  
KALON 1   KUNETKA 1   LEPOVITZ 1   M & B 5  
KALSEA 1   KUYPCO 2   LERN 2   M & F D C 1  
KAMLOK 11   KUYPERS 13   LES TEXAS 3   M & G OPERATING 5  
KANE 3   KYLE 1   LESH 9   M & R EXPLORATION 1  
KANEB 2   L & A ENERGY 4   LESKO 1   M & S 1  
KANELLOS 1   L & B OIL 12   LESS 1   M & W 15  
KANSAS 1   L & F 10   LEUSCHNER 1   M C A 20  
KARBUHN 2   L & L PETROLEUM 72   LEVERIDGE 6   M C O R 7  
KARCHER 2   L & M 1   LEVINSON 1   M C OIL 9  
KARNCO 5   L & T 1   LEVY 1   M C S 2  
KARNES 4   L & W 2   LEWIS 197   M C Z 10  
KARSTEN 76   L B N 3   LEWIS PETRO 16   M G EXP 8  
KASAN 2   L C R A 8   LEXINGTON 2   M G F 60  
KATE 1   L G D C 7   LEY 13   M G U 2  
KATZ 293   L G J 6   LIBERTY 23   M H 2  
KAULBACH 9   L L T 1   LICO 2   M IV OPS 2  
KAYE 3   L M N 5   LIEBMAN-GIBSON 2   M J C 2  
KAYLIN 1   L M P 8   LIFESTYLE 19   M J G 38  
KEAHEY 10   L N R 1   LIGHT 3   M J M 1  
KEARNEY 1   L R F 1   LIGHTHOUSE 12   M K 24  
KEATOR 1   L TEXAS 37   LIGHTNING 70   M K N 4  
KEBO 175   L V O 1   Lignite 1   M L 1  
KECK 4   L X EXPLORATION 1   LILES 1   M L C 1  
KEEHAN 2   LA CAMPBELL 3   LIMES 3   M L RESOURCES 5  
KEEL 1   LA COASTAL 21   LIMESTONE 3   M M C 2  
KEELS 1   LA GLORIA 293   LINCOLN 2   M P G 12  
KEEMAC 4   LA GORCE 6   LINDA 1   M P PETROLEUM 1  
KEENE 5   LA HOLLO 5   LINDEMUTH 1   M P S 75  
KEETON 1   LA JET 4   LINDER 6   M R EXPLORATION 1  
KEFT OIL 1   LA JITA 8   LINDHOLM 16   M R T 1  
KEG 11   LA JOLLA 4   LINGEN 23   M W J 5  
KEGLEY 1   LA JOYA 1   LINK 8   M W PETROLEUM 10  
KELJIKAN 4   LA NELLE 2   LINK OIL &GAS 1   M W R 1  
KELLER 2   LA PARITA 9   LINKENHOGER 1   M-G GAS CO 1  
KELLEY 12   LA PRYOR 2   LINNE 6   M-L INC. 2  
KELLY 31   LA ROCA RESOURCES 1   LION 14   M-TEX 7  
KELPETRO 8   LA ROSA 16   LIPAN 2   M-V 6  
KELSEY 21   LA RUE 2   LIPSCOMB 9   MABEE 21  
KELSO 3   LA SALLE 8   LISSIE 1   MABRY 2  
KEMP 2   LA TERRE 3   LITTLE 70   MAC DRILLING 8  
KEMPER GLICK 1   LAB OIL 21   LITTLE GIANT 4   MAC'S DRILLING 5  
KEN 54   LABELLE 3   LITTLEFIELD 2   MACDIARMID 1  
KEN-KAN 2   LACAL 19   LITTLEPAGE 1   MacDONALD 19  
KENDALL 7   LACEY 19   LITTLETON 1   MACEO 8  
KENERGY 3   LACK 2   LIVE OAK 13   MACERO 23  
KENNARD 45   LACY 46   LIVELY 45   MACHII-ROSS 15  
KENNE 1   LADD 135   LIVINGSTON 3   MACHIN 3  
KENNECOTT 1   LAGARTO 1   LLOG 1   MACK 3  
KENNEDY 9   LAGERQUIST 4   LLOYD 8   MACKEY 9  
KENNON 1   LAGO 4   LOBAR 2   MACKHANK 55  
KENTEX 3   LAGUNA 1   LOBO 91   MACLANE 1  
KENYON 16   LAHOMA 1   LOCAL 10   MACNAUGHTON 1  
KEPLEY 9   LAIN 1   LOCHRIDGE 2   MACPET 17  
KEPLINGER 1   LAIRD 1   LOCKE 2   MACQUEST 1  
KEPPLER 1   LAKE 11   LOCKHART 186   MADDOX 2  
KERN 3   LAKE RONEL 15   LOCO 1   MADDUX 5  
KERNS 5   LAKEVIEW 1   LOFCO 2   MADERA 8  
KERR-MCGEE 34   LAKEWOOD 15   LOFFLAND 9   MADRID 17  
KEWANEE OIL 9   LAMMERTS 2   LOFLIN 3   MADRONE 3  
KEY 2   LAMONT 2   LOGUE 244   MAER 1  
KEYSTONE 7   LANCE 6   LOHMAN 1   MAGALIS 1  
KGMH 1   LAND RESOURCES 6   LOKEY 1   MAGEE 2  
KIBBE 19   LANDA 1   LOMA ALTA 1   MAGGERT 6  
KIDD 25   LANDES 3   LOMA OIL 10   MAGNA 3  
KIEL 36   LANDMARK 1   LOMA VERDE 1   MAGNETIC 1  
KILGORE 37   LANDRESS 4   LOMAC 1   MAGNOLIA 1923  
KILGORE & COFFEE 1   LANDRETH 9   LOMACK 1   MAGNUM 51  
KILGORE-TURNER 1   LANDRUM 6   LOMAK 9   MAGUIRE 164  
KILLAM 951   LANG 44   LONDON PETROLEUM 2   MAIN 3  
KILLINGER 1   LANGHAM 6   LONE OAK 3   MAJESTIC 3  
KILLINGSWORTH 1   LANIER 1   LONE STAR 323   MAJO 3  
KILMARNOCK 2   LANKARD 1   LONG 29   MAJOR 16  
KILROY 173   LANN 2   LONG BROTHERS 8   MALLARD 7  
KIMBALL 3   LANNING 3   LONG TRUSTS 1   MALLORY 1  
KIMBARK 1   LANNING-COFFIELD 1   LONGHORN 83   MALOMAR 1  
KIMBELL 2   LANTANA 15   LOONEY 2   MAN-GAS 2  
KIMMEL 1   LAPIS 1   LOPEZ 2   MANA 30  
KIMMELL 5   LAPO 1   LORDSTONE 1   MANAHAN 7  
KIMMEY 41   LARCO 2   LOS GATOS 17   MANCO 42  
KIN-ARK 2   LAREDO 2   LOS NIETOS 5   MANDARIN 16  
KING 124   LAREDO ENERGY 5   LOTT 1   MANECO 3  
KING-HOARD 1   LAREDO WATER WORKS 1   LOU LITTLE 2   MANETAS 1  
KING-TEX 3   LARIO 10   LOUDON 13   MANFORTH 3  
KINGDOOR 1   LARKINS 2   LOUIS DREYFUS 65   MANFRED 12  
KINGWOOD 24   LAROCA 1   LOUISANA GAS 3   MANGES 45  
KINLAW 4   LAROCA RESOURCES 5   LOUISANA LAND 1   MANGUM 20  
KINLEY 2   LAROCO LLP 16   LOUISIANA CAMPBELL ENERGY 1   MANLER 1  
KINNEAR 2   LARON 4   LOUISIANA GENERAL PETROLEUM 11   MANLEY 44  
KINS 7   LARS 1   LOUISIANA LAND & EXPL 15   MANNING 12  
KINSEL 1   LARSEN 2   LOUISIANA NATURAL 1   MANOR 10  
KINSEY INTEREST 3   LARUE 2   LOUISIANA OIL REFINING 1   MANRY 2  
KIOWA 11   LAS TECAS 1   LOVE 6   MANTI 58  
KIRBY 105   LASITER 1   LOVE & SUN 1   MANTLE 1  
KIRK 2   LASMO ENERGY 1   LOVELADY 57   MAPCO 5  
KIRKPATRICK 108   LATIMER 2   LOWE 16   MAPLES 1  
KIRKSMITH 4   LATTNER 13   LOWER COLORADO RIVER AUTHORITY 2   MAR 4  
KIRKWOOD 589   LAUGHLIN 43   LOWMAR 3   MAR-TEX 2  
KIRKWOOD & MORGAN 1   LAUREL 8   LOWRANCE 1   MARALO 6  
KISSINGER 9   LAURITZEN 11   LP OPERATING 2   MARAN 6  
KLABZUBA 8   LAVACA 7   LU-TEX 4   MARATHON 79  
KLEBERG 3   LAWBAR 45   LUBBOCK COTTON 2   MARCELL 1  
KLEIN 1   LAWLER 2   LUCAS 1   MARCH 1  
KLEINER 7   LAWLESS 9   LUCEY 6   MARCO POLO 1  
KLING 20   LAWLOR 7   LUCK PETROLEUM 1   MARDAM 13  
KLOSTER 1   LAWRENCE 2   LUCKY 6   MARGO 2  
KLOTZMAN 25   LAWSON 1   LUETH 1   MARIAH 3  
KNICKERBOCKER 1   LAY 2   LUHN 1   MARINE 19  
KNIGHT 4   LAYNE 10   LUKER 1   MARINE GATHERING 2  
KNOTT 1   LAYNE TEXAS 10   LULING 149   MARINER 2  
KNOX 2   LAZARUS 1   LULOC 2   MARINO 6  
KOBA 4   LE CUNO 6   LUNDBERG 38   MARION 25  
KOCH 1   LEACH 7   LUNDELL 23   MARK IV 44  
KODIAK 2   LEAHY 4   LUNDELLS 23   MARK PRODUCING 4  
KOENIG 2   LEAKE 1   LUNDIN 1   MARKHAM 1  
KOLLMAN 1   LEAR 13   LURA 1   MARKS 28  
KOSAREK 6   LEARY 1   LUSK 2   MARLAND 1  
KOSSA 1   LEATHERWOOD 1   LUSKEY 1   MARLEX 1  
KOTTICK 1   LEBEN 1   LUTTES 1   MARLIN 5  
KRAAK 2   LECHE 1   LYDA 1   MARLINE 9  
KRAFTEX 2   LECUNO 2   LYLES 9   MARMADUKE 6  
KRAGSETH 2   LEDGE 1   LYMAN 88   MARQUEE 101  
KRASNER 7   LEDLOW 2   LYMAN DAMASCUS 2   MARR 4  
KRAUSE 1   LEE 63   LYMAN(TEXON) 1    
KRCHNAK 1   LEECO 1   LYMAN, C.V. 1    
KRENEK 2   LEEDE 7   LYNAL 1    
KRESCENT 1   LEFEVRE 6   LYNBROOK 4    
KRITI 1   LEGACY 61   LYNCH 34    
Operator Count   Operator Count   Operator Count   Operator Count  
MARRIOTT 1   MEBANE 4   MOODY 19   NEUHAUS 79  
MARSH 65   MECEY 1   MOORE 193   NEUMANN 1  
MARSHALL 55   MECO 8   MOORINGSPORT 5   NEUMIN 147  
MARSTON 4   MECOM 90   MOOSE 27   NEW 1  
MARTEX 4   MED-TEX 6   MORAN 56   NEW CENTURY 15  
MARTIN 198   MEDALLION 7   MORCO 3   NEW HORIZON 1  
MARTIN-BAKER 3   MEDDERS 5   MORELAND 1   NEW HORIZONS 1  
MARTINETS 1   MEEK 2   MOREOIL 1   NEW SEVEN FALLS 5  
MARTS 1   MEEKER 39   MORGAN 590   NEW ULM 4  
MARYE 5   MEEKS 1   MORGAN-GULF 4   NEW-TEX 2  
MARYLAND 19   MEGA 1   MORLAS 1   NEWFIELD 16  
MARZO 2   MEGAHAN 3   MORMAC 256   NEWFIELD EXPLORATION 79  
MASCOT 14   MEGO 4   MORRE 1   NEWGULF 3  
MASIRAN 2   MEJLAENDER 2   MORRIS 33   NEWHALL 2  
MASON 26   MELBA 43   MORRISON 9   NEWITT 18  
MASS ENERGY 1   MELLARD 1   MORROW 1   NEWMAN 189  
MASSENGILL 2   MELLON 32   MORSE 4   NEWMONT 3  
MASSEY 2   MELMERICH 1   MORSEY 11   NEWPORT 4  
MASSINGILL 61   MELTON 2   MORTCO 1   NEWTON 55  
MASTEN 2   MEMORIAL EXPLORATION 1   MORTEX 3   NICCO 2  
MASTERSON 3   MENGDEN 28   MORTIMER 80   NICHOLLS 1  
MATADOR 2   MENGER 1   MORTON 3   NICHOLS 8  
MATAGORDA 12   MERCURY 16   MOSBACHER 245   NICHOLSON 3  
MATHEWS 3   MEREDITH 79   MOSELEY 21   NICKEL 1  
MATHIS 1   MERIDIAN 63   MOSELLE 1   NICKLOS 7  
MATLOCK 2   MERIT 16   MOSS 29   NIELSEN 4  
MATRIX 1   MERREN 2   MOSS & ADAMS 1   NIMROD 1  
MATTHEWS 4   MERRICK 33   MOSS & WATSON 4   NIX 1  
MATTKE 1   MERRITT 13   MOSSER 81   NIXON 12  
MATZINGER 29   MERY 1   MOTCO 3   NOACK 1  
MAUCH 1   MESA 37   MOTEX 43   NOAKE 1  
MAUDLOWE 2   MESA CHICA 2   MOTI 1   NOBB 2  
MAURER 1   MESQUITE 14   MOTT 7   NOBLE 45  
MAVERICK 35   MESSENGER 1   MOULDEN 1   NOBLESON 13  
MAXIMA 6   MESSER 16   MOULTON 7   NOLA OIL & GAS 1  
MAXUS 10   MESSERS CO. 4   MOUND 26   NOLAN 1  
MAXWELL 11   MESTENA 56   MOUNT 8   NOLEN 8  
MAY 36   METALS SERVICE 11   MOUNTAIN TOWNSITE 1   NOMAD 2  
MAYAN 1   METANO ENERGY 7   MOWINCKLE 6   NOMECO 4  
MAYCO 1   METCO 3   MOWINKLE 11   NOR-AM 4  
MAYFAIR 53   METRO 1   MS GUIDANCE 1   NOR-MAC-BURNS 1  
MAYFIELD 15   METROPOLITAN OIL 8   MUCKELROY 1   NORANDA 4  
MAYNARD 36   METTS 1   MUDGE 5   NORBLA 1  
MAYNE 4   MEYERS 28   MUELLER 230   NORCEN 1  
MAYO 34   MIAMI 20   MUGG 1   NORCOFF 1  
MAYS 1   MICHAEL 124   MULE 2   NORCROSS 1  
MAZURICK 1   MICHAUX 39   MULLE 3   NORDAN 22  
McALESTER 13   MICHEL 2   MULTI-ENERGY 1   NORDIC 2  
McALISTER 1   MICHELSON 21   MULVER 1   NORDSTRAND 1  
McALL 3   MID AMERICA 2   MUNDY 1   NOREMAC 6  
McALPIN 3   MID COAST 3   MUNN 1   NORINO 1  
McBEE 13   MID CONTINENTAL 1   MUNSON 3   NORMANDIE 5  
McBRAYER 1   MID GULF 2   MURCHISON 21   NORMANDY 14  
McBRIDE 107   MID KANSAS 1   MURCO 1   NORRIS 20  
McCABE 56   MID-AMERICAN 24   MURDICK 1   NORSWORTHY 14  
McCAIN 1   MID-CENTURY 3   MUREXO 6   NORTEX 21  
McCALEB 15   MID-CONTINENT 25   MURLYNSON 9   NORTH 2  
McCAMERON 1   MID-STATES 2   MUROC 1   NORTH AMERICAN 109  
McCAMEY 1   MID-TEXAS 7   MURPHEY 26   NORTH CENTRAL 177  
McCANDLESS 1   MIDAS 3   MURPHY 20   NORTH PADRE EXPL 2  
McCARRICK 56   MIDDLETON 10   MURRAY 25   NORTH PETTUS 14  
McCARTER 42   MIDHURST 19   MURRELL 1   NORTH ROSS OIL 1  
McCARTHY 96   MIDLAND 40   MURRY 1   NORTH SHORE 7  
McCARTY 1   MIDSTATES 86   MUSS 5   NORTH STAR 13  
McCLAIN 71   MIDTEX 1   MUSSELMAN 29   NORTH TEXAS 5  
McCLUNG 3   MIDWAY 26   MUSTANG 69   NORTHERN MICHIGAN 7  
McCOLLUM 7   MIDWEST 81   MUSTEEN 7   NORTHERN NATURAL 10  
McCOMBS 8   MIERS 1   MUTEX 1   NORTHERN ORDINANCE 9  
McCONNELL 1   MIHOVAL 1   MUTUAL OIL 6   NORTHERN PUMP 116  
McCORD 43   MIKTON 3   MYER 1   NORTHSTAR 3  
McCORMICK 174   MILAGRO 10   MYERS 5   NORTHWEST ARKANSAS 1  
McCRACKEN 2   MILAM 14   N E G 6   NORTHWEST OIL 4  
McCRIGHT 2   MILES 8   N F C PETROLEUM 1   NORTON 55  
McCULLOCH 17   MILESTONE 22   N F OIL 1   NOUVELLE 1  
McCULLOUGH 7   MILHAM 1   N G C ENERGY 1   NOVA ENERGY 2  
McCURDY 20   MILLER 304   N M-YATES 1   NOVUS OIL 1  
McCUTCHIN 6   MILLER & DONZIS 1   N P ENERGY TEXAS 12   NOVUS OIL & GAS 1  
MCDADE 1   MILLER & FOX 29   N P U UNION PRODUCING 1   NOYES 1  
McDANIEL 5   MILLER & PIERCE 25   N R G 6   NU-ENAMEL 1  
McDANNALD 39   MILLICAN 77   N R M 3   NU-SAN 5  
McDERMOTT 37   MILLS 1   N R M C 1   NUCORP 49  
McDONALD 23   MILLSAP 9   N S T 1   NUECES COMPANY 11  
McDONNOLD 2   MILNER 7   NAFCO 2   NUECES MINERALS 4  
McDOUGAL 2   MILO 1   NAILS CREEK 1   NUECES OIL 15  
McDOWELL 3   MILTEX 5   NAIVAR 1   NUECES RESERVES 2  
McDRILLING 2   MIM 11   NANJO 1   NUECES ROYALTY 7  
McELVAIN 8   MIN-TEX 3   NAPECO 9   NUECO 1  
McFADDEN 8   MINAHAN 1   NARECO 1   NUEVE 13  
McFADDIN 1   MINDEN 8   NARMCO 1   NUGENT 6  
McFARLAND 38   MINER 14   NASA 1   NUGGET 46  
McFARLANE 33   MINERAL DEVELOPMENT 1   NASH 2   NULL 87  
MCGAHEY 1   MINERAL PROJECTS 2   NATIONAL ASSOCIATED 5   NUTECH 1  
McGALLIARD 10   MINERAL RESOURCES 1   NATIONAL BULK 2   NUTEX 3  
McGARR 43   MINERALS EXPLORATION 1   NATIONAL DRILLING 3   O G P OPERATING 7  
McGEHEE 1   MINERALS OF TEXAS 2   NATIONAL ENERGY 4   O H B 8  
McGLOTHLIN 1   MINTON 4   NATIONAL EXPLORATION 43   O K WELL SERVICE 2  
McGOLDRICK 3   MINUTEMAN 1   NATIONAL GULF 1   O S R 1  
McGORICK-SMITH 1   MIRADA 4   NATIONAL INVESTOR 1   O'BRANNON 1  
McGOWAN 12   MIRAMAR 41   NATIONAL OIL 29   O'BRYNE 1  
McGREGOR 14   MIRANDO CRUDE 1   NATIONAL ONSHORE 6   O'BYRNE 2  
McGUFFIN 10   MISSION 12   NATIONAL OPERATING 1   O'CONNOR 4  
McGUIRE 1   MISSION RESOURCES 1   NATIONAL PETROLEUM 5   O'DONNELL 1  
MCGUIRT 3   MISSION RIVER 6   NATIONAL PIPE & SUPPLY 1   O'HERN 10  
McHENRY 1   MITCHAMORE 7   NATIONAL RESOURCES