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Class Information
Number: 175/4.54
Name: Boring or penetrating the earth > Boring with explosion in inaccessible hole > With bore condition firing control, or compensating means
Description: Subject matter directed to means provided in the apparatus to (1) start, stop or modify operation of an explosive firing means in response to a sensed condition within the hole or (2) compensate for change in a hole condition due to exploding of a charge.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7387156 |
Perforating safety system |
Jun. 17, 2008 |
| 7287589 |
Well treatment system and method |
Oct. 30, 2007 |
| 7284612 |
Controlling transient pressure conditions in a wellbore |
Oct. 23, 2007 |
| 7246659 |
Damping fluid pressure waves in a subterranean well |
Jul. 24, 2007 |
| 6966377 |
Providing a low pressure condition in a wellbore region |
Nov. 22, 2005 |
| 6896059 |
Components and methods for use with explosives |
May. 24, 2005 |
| 6874579 |
Creating an underbalance condition in a wellbore |
Apr. 5, 2005 |
| 6742602 |
Perforating gun firing head with vented block for holding detonator |
Jun. 1, 2004 |
| 6561274 |
Method and apparatus for unloading well tubing |
May. 13, 2003 |
| 6554081 |
Components and methods for use with explosives |
Apr. 29, 2003 |
| 6435278 |
Firing head/perforating gun latching system and associated methods |
Aug. 20, 2002 |
| 6412573 |
System for indicating the firing of a perforating gun |
Jul. 2, 2002 |
| 6298924 |
Safety method and apparatus for a perforating gun |
Oct. 9, 2001 |
| 6213203 |
Lock mechanism for use with a downhole device |
Apr. 10, 2001 |
| 6182750 |
Device for performing downhole functions |
Feb. 6, 2001 |
| 6179064 |
System for indicating the firing of a perforating gun |
Jan. 30, 2001 |
| 6105688 |
Safety method and apparatus for a perforating gun |
Aug. 22, 2000 |
| 6095258 |
Pressure actuated safety switch for oil well perforating |
Aug. 1, 2000 |
| 6062310 |
Full bore gun system |
May. 16, 2000 |
| 6053111 |
Surface safe rig environment detonator |
Apr. 25, 2000 |
| 6035880 |
Pressure activated switch valve |
Mar. 14, 2000 |
| 5887654 |
Method for performing downhole functions |
Mar. 30, 1999 |
| 5700968 |
Perforating gun brake |
Dec. 23, 1997 |
| 5680905 |
Apparatus and method for perforating wellbores |
Oct. 28, 1997 |
| 5632348 |
Fluid activated detonating system |
May. 27, 1997 |
| 5603384 |
Universal perforating gun firing head |
Feb. 18, 1997 |
| 5598894 |
Select fire multiple drill string tester |
Feb. 4, 1997 |
| 5551520 |
Dual redundant detonating system for oil well perforators |
Sep. 3, 1996 |
| 5392860 |
Heat activated safety fuse |
Feb. 28, 1995 |
| 5369579 |
Electronic blast control system for downhole well operations |
Nov. 29, 1994 |
| 5346014 |
Heat activated ballistic blocker |
Sep. 13, 1994 |
| 5277262 |
Hydraulic safety pin and method of operating a pressure-controlled device |
Jan. 11, 1994 |
| 5191933 |
Wellbore apparatus including a rathole pressure balanced-differential pressure firing system |
Mar. 9, 1993 |
| 5167282 |
Apparatus and method for detonating well perforators |
Dec. 1, 1992 |
| 5165489 |
Safety device to prevent premature firing of explosive well tools |
Nov. 24, 1992 |
| 5159145 |
Methods and apparatus for disarming and arming well bore explosive tools |
Oct. 27, 1992 |
| 5159146 |
Methods and apparatus for selectively arming well bore explosive tools |
Oct. 27, 1992 |
| 5103912 |
Method and apparatus for completing deviated and horizontal wellbores |
Apr. 14, 1992 |
| 5088557 |
Downhole pressure attenuation apparatus |
Feb. 18, 1992 |
| 5078210 |
Time delay perforating apparatus |
Jan. 7, 1992 |
| 5070788 |
Methods and apparatus for disarming and arming explosive detonators |
Dec. 10, 1991 |
| 5067568 |
Well perforating gun |
Nov. 26, 1991 |
| 5058680 |
Method of detonating a perforating apparatus on a tubing including lowering one end of a pump and a firing head into said tubing |
Oct. 22, 1991 |
| 5042593 |
Hydraulically damped detonator for use in perforating oil well tubing |
Aug. 27, 1991 |
| 5040597 |
Well apparatus including a pump and a firing head adapted to be inserted into a tubing which includes a perforating gun |
Aug. 20, 1991 |
| 5016716 |
Tubing carried perforating gun with insulation jacket |
May. 21, 1991 |
| 4971160 |
Perforating and testing apparatus including a microprocessor implemented control system responsive to an output from an inductive coupler or other input stimulus |
Nov. 20, 1990 |
| 4969525 |
Firing head for a perforating gun assembly |
Nov. 13, 1990 |
| 4924952 |
Detonating heads |
May. 15, 1990 |
| 4917189 |
Method and apparatus for perforating a well |
Apr. 17, 1990 |
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