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Class Information
Number: 166/178
Name: Wells > With jar means for releasing stuck part
Description: Devices comprising an apparatus under the class definition combined with a means for giving a sharp blow to the apparatus or part thereof to free it from the well.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7533724 |
Downhole intelligent impact jar and method for use |
May. 19, 2009 |
| 7523786 |
Apparatus and method for freeing deployment cables stuck in a wellbore |
Apr. 28, 2009 |
| 7510008 |
Method and apparatus for decreasing drag force of trigger mechanism |
Mar. 31, 2009 |
| 7395862 |
Combination jar and disconnect tool |
Jul. 8, 2008 |
| 7367397 |
Downhole impact generator and method for use of same |
May. 6, 2008 |
| 7347287 |
Hydraulic timing device |
Mar. 25, 2008 |
| 7343977 |
Translating downhole tool |
Mar. 18, 2008 |
| 7314083 |
Slow rotation fluid jetting tool for cleaning a well bore |
Jan. 1, 2008 |
| 7311149 |
Jar with adjustable preload |
Dec. 25, 2007 |
| 7299872 |
Hydraulic-mechanical jar tool |
Nov. 27, 2007 |
| 7293614 |
Multiple impact jar assembly and method |
Nov. 13, 2007 |
| 7290604 |
Downhole tool with pressure balancing |
Nov. 6, 2007 |
| 7281575 |
Field adjustable impact jar |
Oct. 16, 2007 |
| 7267176 |
Downhole resettable jar tool with axial passageway and multiple biasing means |
Sep. 11, 2007 |
| 7253745 |
Corrosion-resistant downhole transmission system |
Aug. 7, 2007 |
| 7219726 |
Method and apparatus to vibrate a downhole component |
May. 22, 2007 |
| 7163058 |
Hydraulic jar device |
Jan. 16, 2007 |
| 7111678 |
Field adjustable impact jar |
Sep. 26, 2006 |
| 7077205 |
Method and device to free stuck objects |
Jul. 18, 2006 |
| 7066263 |
Tension multiplier jar apparatus and method of operation |
Jun. 27, 2006 |
| 7066251 |
Hydraulic jar lock |
Jun. 27, 2006 |
| 7025130 |
Methods and apparatus to control downhole tools |
Apr. 11, 2006 |
| 7011156 |
Percussion tool and method |
Mar. 14, 2006 |
| 6991035 |
Drilling jar for use in a downhole network |
Jan. 31, 2006 |
| 6948560 |
Jar for use in a downhole toolstring |
Sep. 27, 2005 |
| 6896060 |
Downhole jarring tool adjuster |
May. 24, 2005 |
| 6866096 |
E-line downhole jarring tool |
Mar. 15, 2005 |
| 6779598 |
Swivel and eccentric weight to orient a roller sub |
Aug. 24, 2004 |
| 6745836 |
Down hole motor assembly and associated method for providing radial energy |
Jun. 8, 2004 |
| 6736209 |
Method for vibrational impact on a pipe string in a borehole and devices for carrying out said method |
May. 18, 2004 |
| 6725932 |
Down hole jar tool |
Apr. 27, 2004 |
| 6712134 |
Modular bi-directional hydraulic jar with rotating capability |
Mar. 30, 2004 |
| 6681858 |
Packer retriever |
Jan. 27, 2004 |
| 6655460 |
Methods and apparatus to control downhole tools |
Dec. 2, 2003 |
| 6629565 |
Abandonment and retrieval apparatus and method |
Oct. 7, 2003 |
| 6571870 |
Method and apparatus to vibrate a downhole component |
Jun. 3, 2003 |
| 6543556 |
Abnormal torque absorber for drilling |
Apr. 8, 2003 |
| 6502638 |
Method for improving performance of fishing and drilling jars in deviated and extended reach well bores |
Jan. 7, 2003 |
| 6481495 |
Downhole tool with electrical conductor |
Nov. 19, 2002 |
| 6453997 |
Hydraulically driven fishing jars |
Sep. 24, 2002 |
| 6338387 |
Downward energized motion jars |
Jan. 15, 2002 |
| 6328101 |
Impact enhancing tool |
Dec. 11, 2001 |
| 6325145 |
Pressure pulse attenuator |
Dec. 4, 2001 |
| 6308779 |
Hydraulically driven fishing jars |
Oct. 30, 2001 |
| 6290004 |
Hydraulic jar |
Sep. 18, 2001 |
| 6202767 |
Double acting hydraulic jar |
Mar. 20, 2001 |
| 6196309 |
Down hole pulling tool and method of use |
Mar. 6, 2001 |
| 6182775 |
Downhole jar apparatus for use in oil and gas wells |
Feb. 6, 2001 |
| 6135217 |
Converted dual-acting hydraulic drilling jar |
Oct. 24, 2000 |
| 6109373 |
Cable overshot apparatus |
Aug. 29, 2000 |
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