| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 05/12/2011 | CA2778609A1 Systems and methods for initiating annular obstruction in a subsurface well |
| 05/12/2011 | CA2720443A1 Debris barrier for downhole tools |
| 05/12/2011 | CA2720023A1 Wellhead isolation protection sleeve |
| 05/11/2011 | EP1781897B1 Shearing sealing ram |
| 05/11/2011 | CN201826884U Grouting and sealing machine |
| 05/11/2011 | CN201826832U Detection recorder for ram preventer |
| 05/11/2011 | CN201826807U Gas drainage hole sealing device |
| 05/11/2011 | CN201826806U Sulfur-resisting shear ram applied to blowout preventer in oil and gas drilling |
| 05/11/2011 | CN201826805U Tubing plug for oil and gas field |
| 05/11/2011 | CN201826804U Twin-well ocean wellhead assembly |
| 05/11/2011 | CN201826803U Lubricator for polish rod of pumping well |
| 05/11/2011 | CN201826802U Portable wellhead sealer |
| 05/11/2011 | CN201826801U Wellhead blowout control device |
| 05/11/2011 | CN201826800U Built-in anti-theft device of oil well casing |
| 05/11/2011 | CN201826799U Device for splitting flow from completion drilled well head |
| 05/11/2011 | CN201826798U Wellhead for pressure-bearing injection wells for in-situ leach mining of uranium |
| 05/11/2011 | CN201826797U Anti-spouting day lighting rod sealer |
| 05/11/2011 | CN201826796U Deflection device of well head packing box |
| 05/11/2011 | CN201826795U Anti-sulfur oil-gas production wellhead device self-provided with main control valve replacing structure |
| 05/11/2011 | CN201826794U Combined-sealing type wellhead flow-dividing main body for oilfield wellhead device |
| 05/11/2011 | CN201826793U Integral double-layer polish rod sealer |
| 05/11/2011 | CN102056953A Novel method for the treatment of rock formations and novel polyampholytes |
| 05/11/2011 | CN102052087A Polyurethane foaming bag blocked gas drainage hole |
| 05/11/2011 | CN102052060A Fractal design method of particle size distribution of temporary plugging agent in drilling fluid |
| 05/11/2011 | CN102051161A Thick oil huff and puff deep channel blocking system and injection method thereof |
| 05/10/2011 | US7938192 Packer |
| 05/10/2011 | US7938191 Method and apparatus for controlling elastomer swelling in downhole applications |
| 05/10/2011 | US7938186 Casing shoes and methods of reverse-circulation cementing of casing |
| 05/10/2011 | US7938176 Anti-extrusion device for swell rubber packer |
| 05/10/2011 | CA2696899C Heat exchanger system and method of use thereof and well drilling equipment comprising same |
| 05/10/2011 | CA2672782C Ball operated back pressure valve |
| 05/10/2011 | CA2484611C Downhole tool |
| 05/10/2011 | CA2446868C Apparatus and method for drilling a wellbore with casing and cementing the casing in the wellbore |
| 05/05/2011 | WO2011053370A1 Subsea grease system and method of operating said system |
| 05/05/2011 | WO2011020987A3 Pressure control device |
| 05/05/2011 | WO2011011574A3 Use of a spoolable compliant guide and coiled tubing to clean up a well |
| 05/05/2011 | WO2010122485A3 Hanger floating ring and seal assembly system and method |
| 05/05/2011 | WO2010084369A9 Method for extracting viscous petroleum crude from a reservoir |
| 05/05/2011 | US20110101615 Sealing apparatus |
| 05/05/2011 | US20110101613 Improved seal |
| 05/05/2011 | US20110100649 Isolation tool |
| 05/05/2011 | US20110100648 Improved activation device |
| 05/05/2011 | US20110100647 Tubular Actuator, System and Method |
| 05/05/2011 | US20110100646 Downhole Running Tool and Method |
| 05/05/2011 | US20110100643 Downhole sub with hydraulically actuable sleeve valve |
| 05/05/2011 | US20110100637 Safety Mechanism for Blowout Preventer |
| 05/05/2011 | US20110100634 Downhole chemical delivery system and method |
| 05/05/2011 | US20110100626 Settable Compositions Comprising Unexpanded Perlite and Methods of Cementing in Subterranean Formations |
| 05/05/2011 | US20110100625 Method for forming an isolating plug |
| 05/05/2011 | CA2777900A1 A system for testing cement |
| 05/04/2011 | EP2317067A2 Downhole apparatus comprising a swellable member and related method |
| 05/04/2011 | EP2317066A2 Downhole apparatus comprising a swellable member and related method |
| 05/04/2011 | EP2317065A1 Equipment for remote launching of cementing plugs |
| 05/04/2011 | EP2315908A1 Sealing arrangement and sealing method |
| 05/04/2011 | EP2315907A1 Wellhead annulus monitoring |
| 05/04/2011 | EP2315906A1 Load bearing assembly |
| 05/04/2011 | CN201818278U Physical foaming cement well cementation matching device |
| 05/04/2011 | CN201818277U Compression type open hole packer |
| 05/04/2011 | CN201818276U Rubber stopper packer |
| 05/04/2011 | CN201818275U Automatic steel ball throwing device for water hole of drilling tool |
| 05/04/2011 | CN201818274U Sand washing, overflow preventing and blowout controlling device |
| 05/04/2011 | CN201818273U Safe rudder capable of preventing oil tube from being ejected upwards and preventing ejection |
| 05/04/2011 | CN201818272U High-pressure oil and gas well anti-jack device |
| 05/04/2011 | CN201818271U Spray-proof high-pressure polish rod sealing equipment |
| 05/04/2011 | CN201818270U Wellhead rotation guider |
| 05/04/2011 | CN201818259U Remote control type drilling well leak stopping bypass joint |
| 05/04/2011 | CN102042003A Digital sound wave and variable-density comprehensive logging instrument |
| 05/04/2011 | CN102041975A Compressed packer sealing cylinder for oil and gas fields |
| 05/04/2011 | CN102041974A Bypass short-circuit structure of abandoned deep water well cutting device and cementing plug method thereof |
| 05/04/2011 | CN102041970A Protection device for separate stratum fracturing of continuous oil pipe |
| 05/03/2011 | US7934557 Methods of completing wells for controlling water and particulate production |
| 05/03/2011 | US7934554 Methods and compositions comprising a dual oil/water-swellable particle |
| 05/03/2011 | US7934546 Fracturing head with replaceable inserts for improved wear resistance and method of refurbishing same |
| 05/03/2011 | CA2684600C Producer well plugging for in situ combustion processes |
| 05/03/2011 | CA2658937C Modified christmas tree components and associated methods for using coiled tubing in a well |
| 04/28/2011 | WO2011050060A2 Method for plugging wells |
| 04/28/2011 | WO2011048005A2 Metal seal |
| 04/28/2011 | WO2010151905A3 High pressure/high temperature packer seal |
| 04/28/2011 | US20110095485 Metal-to-metal seal with retention device |
| 04/28/2011 | US20110094757 Sealing apparatus for a downhole tool |
| 04/28/2011 | US20110094756 Systems and methods for initiating annular obstruction in a subsurface well |
| 04/28/2011 | US20110094755 Systems and methods for initiating annular obstruction in a subsurface well |
| 04/28/2011 | US20110094750 Systems and methods for producing oil and/or gas |
| 04/28/2011 | US20110094749 Purge System |
| 04/28/2011 | US20110094742 Casing Shoes and Methods of Reverse-Circulation Cementing of Casing |
| 04/27/2011 | EP2314829A1 Modular dart launching valve |
| 04/27/2011 | EP2314828A2 Wellhead system having wicker sealing surface |
| 04/27/2011 | EP2313606A1 Downhole tool with multiple material retaining ring |
| 04/27/2011 | CN201810270U Vertical well cementation manifold for ocean oil production |
| 04/27/2011 | CN201810264U Well cementing rubber plug of lock pin type |
| 04/27/2011 | CN201810263U Self-expansion packer for staged fracturing of horizontal well |
| 04/27/2011 | CN201810262U Open hole packer with single rubber tube |
| 04/27/2011 | CN201810261U Water-injecting packer capable of being backwashed |
| 04/27/2011 | CN201810260U Logging twin packer for cased well perforation interval |
| 04/27/2011 | CN201810259U Graded-unsealing well-flushing type packer |
| 04/27/2011 | CN201810258U Packer of pumping well |
| 04/27/2011 | CN201810257U Mechanical water plugging pipe string without slips |
| 04/27/2011 | CN201810256U Anti-corrosion wear-resisting blowout control box |
| 04/27/2011 | CN201810255U Filling and producing dual-purpose casting head of combustion oil layer |
| 04/27/2011 | CN201810254U Sealing plug rod of vertical circular solid conductor |