US3273588A
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|
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1966-09-20 |
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Flow control valve for usb in a well tubing string |
USRE17217E
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1929-02-19 |
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Casinoshoe |
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1927-07-23 |
1929-11-19 |
Willard L Borough |
Standing-valve construction
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US2040889A
(en)
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1933-05-23 |
1936-05-19 |
Sullivan Machinery Co |
Core drill
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1938-04-11 |
1939-05-30 |
Shell Dev |
Process and apparatus for cementing oil wells
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1938-10-04 |
1940-12-03 |
Ambrose L Cox |
Sand sucker apparatus
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US2230447A
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1939-08-26 |
1941-02-04 |
Bassinger Ross |
Well plug
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1940-07-05 |
1942-06-09 |
Charles W Thornhill |
Well cementing apparatus
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US2331532A
(en)
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1940-08-24 |
1943-10-12 |
Bassinger Ross |
Well plug
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(en)
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1942-01-28 |
1945-05-22 |
Richard R Lawrence |
Wire line safety control packer
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1945-10-11 |
1952-04-22 |
Baker Oil Tools Inc |
Well cementing apparatus
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1945-12-22 |
1951-06-05 |
Baker Oil Tools Inc |
Bridge plug
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1947-04-15 |
1952-03-18 |
Halliburton Oil Well Cementing |
Drillable packer
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1948-03-15 |
1952-11-04 |
Texas Co |
By-pass connection for hydraulic well pumps
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1949-03-11 |
1953-06-02 |
Baker Oil Tools Inc |
Apparatus for operating tools in well bores
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1950-06-19 |
1955-07-26 |
Baker Oil Tools Inc |
Releasable operating devices for subsurface well tools
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1951-08-08 |
1955-08-09 |
Lane Wells Co |
Bridging plug
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1952-08-19 |
1956-03-06 |
Baker Oil Tools Inc |
Explosion resistant well packer
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1952-09-10 |
1956-07-31 |
Willie W Farrar |
Retrievable well packers with opposing slips
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1955-02-15 |
1958-05-06 |
George H Sailers |
Screen and set shoe assembly for wells
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1956-07-12 |
1958-04-15 |
George A Butler |
Combined sealing plug and tubing hanger
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1957-09-13 |
1961-12-19 |
Phillips Petroleum Co |
Casing bottom fill device
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1957-10-09 |
1962-12-28 |
Kigass Ltd |
Improvements in or relating to fuel atomisers for internal combustion engines
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1958-09-15 |
1962-09-18 |
James W Bonner |
Well packer
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1959-03-20 |
1963-03-26 |
Lane Wells Co |
Well packing devices
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1960-12-01 |
1962-11-06 |
Brown Oil Tools |
Differential pressure fill-up shoe
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1961-02-15 |
1964-12-29 |
Halliburton Co |
Well packers
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1961-12-20 |
1964-12-08 |
James W Bonner |
Well apparatus setting tool
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1963-11-21 |
1966-11-01 |
C C Brown |
Well packer
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1964-02-17 |
1966-12-13 |
Schlumberger Well Surv Corp |
Permanently set bridge plug
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1964-03-11 |
1967-02-28 |
Schlumberger Technology Corp |
Permanently set bridge plug
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1964-08-19 |
1967-01-17 |
Martin B Conrad |
Actuator device for well tool
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1964-09-04 |
1970-04-21 |
Baker Oil Tools Inc |
Retrievable subsurface well tools
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1964-12-16 |
1967-03-14 |
Huber Corp J M |
Core barrel drill
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1965-07-13 |
1967-12-05 |
Gearhart Owen Inc |
Subsurface well bore fluid flow control apparatus
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1965-10-11 |
1967-01-17 |
Schlumberger Well Surv Corp |
Non-retrievable bridge plug
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1965-11-12 |
1968-07-23 |
Mini Petrolului |
Retrievable packer for wells
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1966-12-02 |
1969-02-25 |
Schlumberger Technology Corp |
Well tool with selectively engaged anchoring means
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1969-01-21 |
1971-01-12 |
Dresser Ind |
Well packer and sealing elements therefor
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1969-04-01 |
1970-06-30 |
Dresser Ind |
Well packer and packing element supporting members therefor
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1969-12-31 |
1971-08-31 |
Schlumberger Technology Corp |
Retrievable well packer
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1970-01-02 |
1971-11-30 |
Schlumberger Technology Corp |
Anchoring apparatus for a well packer
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1970-12-28 |
1972-08-29 |
Otis Eng Corp |
Method and apparatus for treating wells
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1972-03-27 |
1975-01-14 |
Otis Eng Co |
Safety valves for wells
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1972-05-01 |
1974-01-22 |
Robbins Co |
Rock cutter assembly
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1972-11-17 |
1974-06-25 |
Dresser Ind |
Well packer and retriever
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1972-11-17 |
1974-12-03 |
Dresser Ind |
Well packer and retriever
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1974-05-28 |
1975-12-16 |
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Well conduit cementing adapter tool
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1974-08-08 |
1977-09-20 |
Brown Oil Tools, Inc. |
Check valve assembly
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1975-12-15 |
1977-07-12 |
Jarva, Inc. |
Hard rock trench cutting machine
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1977-04-18 |
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Weatherford Dmc |
Chemical cutting appratus and method for use in wells
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1977-06-14 |
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Dresser Industries, Inc. |
Oilwell tubing tester with trapped valve seal
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Measuring device, in particular for roller cutting machines used underground
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1977-12-12 |
1979-05-01 |
Halliburton Company |
EZ disposal packer
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1978-09-05 |
1980-01-29 |
Halliburton Company |
Casing bridge plug with push-out pressure equalizer valve
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1980-06-12 |
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Tri-State Oil Tool Industries, Inc. |
Method and apparatus for well treating
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1980-11-21 |
1983-04-26 |
The Robbins Company |
Raise bit with cutters stepped in a spiral and flywheel
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1981-06-03 |
1984-03-20 |
Baker International Corporation |
Combination release mechanism for downhole well apparatus
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1981-10-02 |
1983-09-20 |
Baker International Corporation |
Positive locating expendable plug
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1981-11-09 |
1984-02-21 |
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Apparatus for releasably bridging a well
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1981-11-27 |
1983-07-05 |
Dresser Industries, Inc. |
Quick release downhole motor coupling
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1984-04-30 |
Metalurgica Ind Mec Sa |
REPERFORABLE BRIDGE PLUG
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1983-03-24 |
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Hydraulic setting tool
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Tubing pressurized firing apparatus for a tubing conveyed perforating gun
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1986-11-21 |
Petroles Cie Francaise |
PRODUCTION TUBE AND CONNECTION FOR PRODUCTION TUBE, FACILITATING COMPLETION OF OIL WELL
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1983-12-06 |
1985-10-22 |
The Robbins Company |
Mobile mining machine and method
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1987-11-24 |
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Drillable well-fluid flow control tool
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Camco, Incorporated |
Method and apparatus for stopping well production
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Tool for holding round thread dies
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Hydra-Shield Manufacturing Co. |
Coupling for fire hydrant-fire hose connection
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Camco, Incorporated |
Well packer with releasable head and method of releasing
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Oil Patch Group Inc. |
Stabilizing tool for well drilling
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Method and apparatus for well drilling
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Otis Engineering Corporation |
Safety valve
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Drillable bridge plug
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Apparatus for installing a liner within a well bore
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Setting tool for mechanical packer
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Tam International |
Multiple-set downhole tool and method
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Back pressure plug tool
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Pella Engineering & Reseach Corporation |
Undercut trenching machine
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Well casing flotation device and method
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Downhole tool apparatus with non-metallic components and methods of drilling thereof
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Downhole tool with sliding valve
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1992-01-21 |
Otis Engineering Corporation |
Rotary locking system with metal seals
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Diamant Boart Stratabit Ltd |
Corebarrel
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Halliburton Company |
Non-rotating cementing plug with molded inserts
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Trenching machine with laterally adjustable chain-type digging implement
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Ball and seat valve
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Halliburton Company |
Apparatus and method of anchoring and releasing from a packer
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Baker Hughes Incorporated |
Self-contained closure mechanism for a core barrel inner tube assembly
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Vermeer Manufacturing Company |
Trenching apparatus
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Hydraulically actuated liner hanger arrangement and method
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Hostile environment packer system
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Cementing apparatus
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Camco International Inc. |
Multiple use well packer
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Halliburton Company |
Apparatus and method of anchoring and releasing from a packer
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1994-09-27 |
C. M. E. Blasting and Mining Equipment Ltd. |
Grinding cup
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Socket wrench extension
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Baski Water Instruments |
Flow and pressure control packer valve
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Vermeer Manufacturing Company |
Mounting apparatus for a bridge of a trenching machine
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The Sollami Company |
Insert for tungsten carbide tool
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Disc cutter and method of replacing disc cutters
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Slickline setting tool and bailer bottom for plugback operations
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Trenching system for earth surface use, as on paved streets, roads, highways and the like
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Well completion system with flapper control valve
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Wellbore shoe joints and cementing systems
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Downhole tool apparatus with non-metallic packer element retaining shoes
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Coaxial hose fitting
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Downhole tool apparatus and method of limiting packer element extrusion
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1996-05-24 |
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Wellhead for undersea borehole
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Earth-boring bit having cutter with replaceable kerf ring with contoured inserts
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Device and method for producing a containment barrier underneath and around in-situ buried waste
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Static wellhead plug and associated methods of plugging wellheads
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Downhole apparatus
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Underbalanced well completion
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Low pressure, high temperature composite bridge plug
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