Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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03/01/1994 | US5290768 Welan gum-ethylene glycol insulating compositions |
03/01/1994 | US5289889 Roller cone core bit with spiral stabilizers |
03/01/1994 | US5289882 Sealed electrical conductor method and arrangement for use with a well bore in hazardous areas |
03/01/1994 | CA2104986A1 Apparatus and method for coupling elongated members |
02/23/1994 | EP0583650A1 Method and device for underground introduction of long transport pipes into the earth |
02/23/1994 | CN2157301Y Large-bore automatic centralising power chuck |
02/23/1994 | CN1023871C Diameter-regulating centralizing device |
02/22/1994 | US5288271 Constant velocity universal joint assembly for downhole motor |
02/22/1994 | US5288173 Method for the directional control of an earth boring device as well as apparatus for making earth bores |
02/22/1994 | US5287936 Rolling cone bit with shear cutting gage |
02/22/1994 | US5287920 Large head downhole chemical cutting tool |
02/22/1994 | CA2012033C Plastic bore seal |
02/17/1994 | WO1994003703A1 Gravel pack screen for well completions |
02/17/1994 | WO1994003700A1 Lightweight drill pipe |
02/17/1994 | CA2140754A1 Gravel pack screen for well completions |
02/16/1994 | CN2156279Y Smooth sealing device for oil pump |
02/16/1994 | CN2156278Y Single wedge smooth rod clip for oil pump |
02/16/1994 | CN2156277Y Rotary hollow oil suction rod liquid feeding pile |
02/16/1994 | CN1082158A High torque connecting hoop |
02/16/1994 | CN1082138A Hole opener for the top hole section of oil/gas wells |
02/15/1994 | US5286393 Coating and bonding composition |
02/15/1994 | US5286069 Stress relief groove for drill pipe |
02/15/1994 | US5285846 Thermal mineral extraction system |
02/08/1994 | US5285204 Coil tubing string and downhole generator |
02/08/1994 | US5285008 For use in well operations |
02/08/1994 | US5284216 Down-the-hole drill tool for drilling in advance of a casing tube |
02/08/1994 | US5284214 Drill pipe coupling apparatus |
02/08/1994 | US5284210 Top entry sub arrangement |
02/03/1994 | DE4225009A1 Drill collar for rotary rock drilling - comprises eccentric imbalance to improve vertical drill string guiding |
02/02/1994 | CN2154904Y Sleeve connector |
02/02/1994 | CN1081490A Process for mfg. high-strength sucker cod |
02/01/1994 | US5282696 Pneumatic ram pipe replacement |
02/01/1994 | US5282653 Coupling apparatus |
02/01/1994 | US5282508 Process to increase petroleum recovery from petroleum reservoirs |
01/26/1994 | EP0580271A2 Drill pipe |
01/26/1994 | EP0579631A1 Water extraction components produced by adhesive bonds, process for their manufacture and their use. |
01/26/1994 | CN2154342Y Pearl type correcting anti-drop apparatus of sucker rod |
01/25/1994 | CA2097366A1 Drill pipe |
01/20/1994 | WO1994001652A1 Joining tubing with a gas tight seal |
01/19/1994 | EP0578681A1 Retrievable bridge plug and a running tool therefor. |
01/18/1994 | US5279368 Anti-fouling covering for use in sub-sea structures |
01/12/1994 | EP0577898A1 Stainless non-magnetic steel with high manganese and chromium content, resistant to stress corrosion and useful for drilling equipment, also the process for manufacturing rods from this steel |
01/12/1994 | EP0577845A1 Device for positioning member and excavating direction control device for excavator employing said device |
01/12/1994 | CN2152900Y Threaded quick-jointing bit rod joint |
01/12/1994 | CN2152899Y Centralising device for sucker rod |
01/11/1994 | US5277255 Well liner running shoe |
01/11/1994 | US5277254 Helical rod guide |
01/11/1994 | CA1326052C Pipe connector |
01/07/1994 | CA2081941A1 Well tool and method of manufacture |
01/06/1994 | WO1994000669A1 Method and apparatus for inspecting subsurface environments |
01/06/1994 | CA2138013A1 Method and apparatus for inspecting subsurface environments |
01/05/1994 | DE4312451A1 Connector for well plugging charges - has perforated side wall and perforated end coupling elements |
01/05/1994 | DE4220636A1 Coupling sleeve for self-tapping injection anchors for flushing medium injection during percussion drilling - includes internal thread and axial abutment for screwed-in injection anchor |
01/04/1994 | US5275845 Applying a ceramic based lubricant paste, oil and gas production equipment |
01/04/1994 | US5275441 Blast joint with torque transferring connector |
01/04/1994 | US5275246 Drill string bridge coupler and actuator |
01/04/1994 | US5275245 Device to facilitate creating foxholes with explosives and method of making the same |
01/04/1994 | US5275240 Method and apparatus for preventing casing damage due to formation compaction |
01/04/1994 | US5275038 Downhole reeled tubing inspection system with fiberoptic cable |
12/29/1993 | EP0469133B1 Device for delivering corrosion or deposition inhibiting agents into a well by means of an auxiliary delivery tube |
12/29/1993 | CN2151245Y Centrilizing device of pipe sucking pump |
12/29/1993 | CN2151244Y Multifunctional joint |
12/29/1993 | CN2151243Y Underground rotor location limitator of screw rod oil sucker |
12/28/1993 | US5273123 Fitting for controlled trajectory drilling, comprising a variable angle elbow element and use of this fitting |
12/23/1993 | WO1993026061A1 Electrical connector and pump assembly utilizing same |
12/23/1993 | WO1993025794A1 Well drilling tools |
12/22/1993 | EP0575114A1 Large head downhole chemical cutting tool |
12/22/1993 | CN2150329Y Wax-scraping righting device for oil-pumping well |
12/22/1993 | CN2150325Y Invert-buckled protective lifting short |
12/22/1993 | CN2150324Y Integral cable AC electric-heating sucker rod |
12/21/1993 | US5271630 Conduit seal |
12/21/1993 | CA1325421C Drill rod for percussion drilling |
12/16/1993 | DE4225806C1 Drilling bit mounting for boring large holes - has clamp within drilling tube with radial expansion against eccentric type carrier |
12/15/1993 | EP0574102A1 Pretreatment process for the elements of a gastight pipe connection |
12/15/1993 | EP0573483A1 Improvements in and relating to pipe connectors |
12/15/1993 | CN2149474Y Centralising device for dring casing |
12/15/1993 | CN2149473Y Oil sucking out equipment of ball locking channel type |
12/15/1993 | CN1079531A Multiple layer casing system |
12/14/1993 | US5269572 Apparatus and method for coupling elongated members |
12/14/1993 | US5269570 Flexible casing for well boreholes |
12/14/1993 | US5269377 Coil tubing supported electrical submersible pump |
12/09/1993 | WO1993024728A1 Downhole tools |
12/09/1993 | WO1993024708A1 Apparatus for drilling and maintenance of holes in a golf course |
12/09/1993 | DE4232560C1 Earth-drilling auger device - has screw shaft bore provided with check valve |
12/08/1993 | CN2148834Y Anti-dropping and anti-wearing jointing hoop for sucker rod |
12/08/1993 | CN2148819Y Twist drilling rod |
12/08/1993 | CN2148818Y Gravity balance sucker rod with crank rocker structure |
12/07/1993 | USRE34467 Tubular connection |
12/07/1993 | US5267621 Drill pipe breakout device |
12/07/1993 | CA1324917C Reversible, articulated mechanical coupling and relevant seat, for anchorages under tension |
12/01/1993 | CN1079021A Drill string component |
11/30/1993 | US5265684 Downhole adjustable stabilizer and method |
11/30/1993 | US5265680 Method for installing instruments in wells |
11/30/1993 | US5265675 Well conduit cutting and milling apparatus and method |
11/30/1993 | US5265466 Rod insertion method and friction reducing device |
11/25/1993 | DE4216747A1 Connector for force-locking flat connection of fixed and flexible pipes - comprises two screw threaded dishes fitted round area where normal screw fittings are impossible. |
11/24/1993 | EP0571346A1 Drill string component |
11/24/1993 | EP0570657A1 corrosion resistant pipe |
11/24/1993 | CN2147346Y Multi-function well controlling pressure testing joint |
11/24/1993 | CN2147341Y Pulse sleeve joint |