| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 02/09/1999 | US5868203 Apparatus and method for subsea connections of trees to subsea wellheads |
| 02/09/1999 | US5868201 Computer controlled downhole tools for production well control |
| 02/08/1999 | CA2244665A1 Control module system for subterranean well |
| 02/04/1999 | WO1998050680A3 Monitoring of downhole parameters and tools utilizing fiber optics |
| 02/03/1999 | EP0894353A1 Underground well electrical cable transition, seal and method |
| 02/03/1999 | EP0894182A2 Tubing injection systems for land and under water use |
| 02/03/1999 | CN2306314Y Beam-pumping unit well polish rod deviation regulating sealer |
| 02/02/1999 | US5865392 Coiled-tubing reel having a mechanical restraint |
| 02/02/1999 | US5865255 Full bore nipple and associated lock mandrel therefor |
| 02/02/1999 | US5865250 Fluid connector with check valve and method of running a string of tubing |
| 02/02/1999 | US5865247 Cellulose injection system and method |
| 02/02/1999 | US5865245 Stuffing box gland |
| 02/02/1999 | CA2124404C Oil well casing cementing receiver and plug |
| 01/28/1999 | WO1999004137A1 Simultaneous production and water injection well system |
| 01/28/1999 | WO1999004135A1 Deformed multiple well template and process of use |
| 01/27/1999 | CN2305483Y Polish rod double ball sealing device for pumping well |
| 01/27/1999 | CN2305482Y Hydraulic plug |
| 01/27/1999 | CN2305481Y Self sealing device for kelly |
| 01/26/1999 | US5863022 Stripper/packer and blowout preventer with split bonnet |
| 01/26/1999 | US5862866 Double walled insulated tubing and method of installing same |
| 01/26/1999 | US5862861 Plug apparatus suitable for sealing holes of variable or roughened diameter |
| 01/21/1999 | WO1999002818A1 Downhole tubing |
| 01/21/1999 | WO1999002815A1 Device and method for creating ramifications in a bore hole |
| 01/20/1999 | EP0892147A2 Dual downhole injection system utilizing coiled tubing |
| 01/19/1999 | US5860477 Underwater oil field apparatus |
| 01/19/1999 | CA2120366C Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells |
| 01/19/1999 | CA2104534C Retrievable whipstock |
| 01/14/1999 | WO1999001639A1 Blowout preventer packing element with metallic inserts |
| 01/14/1999 | WO1999001605A1 Tension member |
| 01/13/1999 | EP0890783A1 Safety device for a gas storage cavern |
| 01/13/1999 | EP0890706A2 Slip retaining system for downhole tools |
| 01/13/1999 | EP0890014A1 Method and system for monitoring a characteristic of an earth formation in a well |
| 01/13/1999 | EP0890013A1 Monobore riser bore selector |
| 01/13/1999 | CN2303928Y Easy-to-fit and change packing-type polish-rod sealing device |
| 01/12/1999 | US5857810 In-situ chemical barrier and method of making |
| 01/12/1999 | US5857714 Service cable and cable harness for submersible sensors and pumps |
| 01/12/1999 | US5857524 Liner hanging, sealing and cementing tool |
| 01/12/1999 | US5857520 Backup shoe for well packer |
| 01/12/1999 | US5857518 Oil well pump leakage accumulator |
| 01/12/1999 | CA2160668C Tubing rotator and hanger |
| 01/06/1999 | CN2303081Y High pressure soft connection apparatus used for thermal prodn. well |
| 01/05/1999 | US5856790 Remote control for a plug-dropping head |
| 01/02/1999 | CA2242027A1 Downhole lubricator for installation of extended assemblies |
| 12/30/1998 | EP0886738A1 Rod seal cartridge for progressing cavity artificial lift pumps |
| 12/30/1998 | CN2302330Y Self-lubricating bare rod sealer |
| 12/23/1998 | WO1998058152A1 Method and apparatus for drilling subsea wells |
| 12/23/1998 | EP0885345A1 High pressure tree cap |
| 12/23/1998 | EP0885344A1 Method of removing wellhead assemblies |
| 12/23/1998 | CN1202568A Compound super elastic marmen thermal recovery packer |
| 12/23/1998 | CN1041321C Temperarily blocking agent for water soluble stratum and its preparing method |
| 12/22/1998 | US5851389 Apparatus for removing a contaminant from a fluid stream |
| 12/22/1998 | US5851013 Blowout preventer packing element with metallic inserts |
| 12/22/1998 | US5850874 Drilling system with electrically controlled tubing injection system |
| 12/22/1998 | CA2162311C Seal arrangement for the drivehead of a downhole rotary pump |
| 12/22/1998 | CA2095937C Sealing assembly for rotary oil pumps and method of using same |
| 12/17/1998 | WO1998057028A1 Casing annulus remediation system |
| 12/17/1998 | DE19729809C1 Vorrichtung und Verfahren zum Herstellen von Bohrlochverzweigungen Apparatus and method for producing borehole branches |
| 12/16/1998 | CN2300721Y Collision press type inner pipe cement filling device |
| 12/15/1998 | US5848656 Device for controlling underwater pressure |
| 12/15/1998 | US5848646 Well completion apparatus for use under pressure and method of using same |
| 12/15/1998 | US5848643 Rotating blowout preventer |
| 12/09/1998 | CN2299936Y Opened sucker polish rod packing box |
| 12/08/1998 | US5845720 Method for providing a substantially leakproof shielding layer in the ground and a device for performing the method |
| 12/08/1998 | US5845712 Method of producing fluid from a formation |
| 12/08/1998 | US5845711 For lowering a downhole tool on a coiled tubing through an outer pipe string |
| 12/08/1998 | US5845708 For injecting/withdrawing casing, pipe or tubing into/from a well |
| 12/03/1998 | WO1998054499A1 Pig delivery and transport system for subsea wells |
| 12/02/1998 | EP0881354A2 Method and apparatus for cementing a well |
| 12/02/1998 | EP0880638A1 Method and apparatus for use in inflating packer in well bore |
| 12/01/1998 | US5842816 Pig delivery and transport system for subsea wells |
| 12/01/1998 | US5842519 Process for reducing hydrocarbon leakage from a subterranean storage cavern |
| 12/01/1998 | US5842518 Method for drilling a well in unconsolidated and/or abnormally pressured formations |
| 12/01/1998 | US5842517 Anti-rotational cementing apparatus |
| 12/01/1998 | US5842252 For stripping liquid from the external surface |
| 12/01/1998 | CA2148197C Wireline set, tubing retrievable well packer with flow control device run at top |
| 11/30/1998 | CA2206559A1 Wellhead isolation tool |
| 11/24/1998 | US5841055 Method for controlled refining of explosive compositions |
| 11/24/1998 | US5839866 Mechanical overload protection device |
| 11/24/1998 | US5839515 Slip retaining system for downhole tools |
| 11/24/1998 | US5839512 Adjustable casing hanger with contractible load shoulder and metal sealing ratch latch adjustment sub |
| 11/19/1998 | WO1998035131A3 Tool and method for removing excess cement from the top of a liner after hanging and cementing thereof |
| 11/18/1998 | EP0877853A2 Downhole valve |
| 11/18/1998 | EP0877852A1 Inflatable packer |
| 11/17/1998 | US5836396 Method of operating a downhole clutch assembly |
| 11/17/1998 | CA2210239C Integral tubing head and rotator |
| 11/17/1998 | CA2029896C Blowout preventer for wild well |
| 11/12/1998 | WO1998050681A1 Wellbores utilizing fiber optic-based sensors and operating devices |
| 11/12/1998 | WO1998050680A2 Monitoring of downhole parameters and tools utilizing fiber optics |
| 11/12/1998 | WO1998050675A1 Multi-gage blowout preventer test tool and method |
| 11/12/1998 | WO1998050674A1 Anti-rotational cementing apparatus |
| 11/12/1998 | WO1998050673A1 Packer having sensors for downhole inflation monitoring |
| 11/12/1998 | WO1998050672A1 Improved method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing |
| 11/12/1998 | CA2318955A1 Anti-rotational cementing apparatus |
| 11/11/1998 | EP0876546A1 Completions insertion and retrieval under pressure (cirp) apparatus including the snaplock connector |
| 11/11/1998 | CN2296930Y Oil Well packer |
| 11/10/1998 | US5833208 Inner seal for ram-type blowout preventer |
| 11/10/1998 | US5833004 Method of running liners into a wellbore |
| 11/10/1998 | US5833002 Remote control plug-dropping head |
| 11/10/1998 | US5833001 Sealing well casings |
| 11/10/1998 | US5832998 Coiled tubing deployed inflatable stimulation tool |