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Class Information
Number: 175/4.55
Name: Boring or penetrating the earth > Boring with explosion in inaccessible hole > Independent firing of plural charges
Description: Subject matter directed to means including plural charges and a control to separately fire the charges.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7621342 |
Method for retaining debris in a perforating apparatus |
Nov. 24, 2009 |
| 7461580 |
Casing conveyed well perforating apparatus and method |
Dec. 9, 2008 |
| 7430965 |
Debris retention perforating apparatus and method for use of same |
Oct. 7, 2008 |
| 7350448 |
Perforating apparatus, firing assembly, and method |
Apr. 1, 2008 |
| 7347278 |
Secure activation of a downhole device |
Mar. 25, 2008 |
| 7284489 |
Casing conveyed well perforating apparatus and method |
Oct. 23, 2007 |
| 7172023 |
Perforating gun assembly and method for enhancing perforation depth |
Feb. 6, 2007 |
| 6962202 |
Casing conveyed well perforating apparatus and method |
Nov. 8, 2005 |
| 6877562 |
Oil well perforator |
Apr. 12, 2005 |
| 6758124 |
Unique phasings and firing sequences for perforating guns |
Jul. 6, 2004 |
| 6675896 |
Detonation transfer subassembly and method for use of same |
Jan. 13, 2004 |
| 6604584 |
Downhole activation system |
Aug. 12, 2003 |
| 6523449 |
Perforating gun |
Feb. 25, 2003 |
| 6283227 |
Downhole activation system that assigns and retrieves identifiers |
Sep. 4, 2001 |
| 5887654 |
Method for performing downhole functions |
Mar. 30, 1999 |
| 5388521 |
Method of reducing ground vibration from delay blasting |
Feb. 14, 1995 |
| 5278359 |
Simple multishot downhole explosive tool |
Jan. 11, 1994 |
| 5107929 |
Drop off method for perforating gun capsule charge carriers |
Apr. 28, 1992 |
| 5103912 |
Method and apparatus for completing deviated and horizontal wellbores |
Apr. 14, 1992 |
| 5042594 |
Apparatus for arming, testing, and sequentially firing a plurality of perforation apparatus |
Aug. 27, 1991 |
| 5022485 |
Method and apparatus for detonation of distributed charges |
Jun. 11, 1991 |
| 5007344 |
Dual firing system for a perforating gun |
Apr. 16, 1991 |
| 4991684 |
Method and apparatus for detonation of distributed charges |
Feb. 12, 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 |
| 4960171 |
Charge phasing arrangements in a perforating gun |
Oct. 2, 1990 |
| 4895218 |
Multishot downhole explosive device as a seismic source |
Jan. 23, 1990 |
| 4832134 |
Shaped charge assembly with retaining clip |
May. 23, 1989 |
| 4673033 |
Tubing conveyed perforating assembly safety device |
Jun. 16, 1987 |
| 4656944 |
Select fire well perforator system and method of operation |
Apr. 14, 1987 |
| 4648471 |
Control system for borehole tools |
Mar. 10, 1987 |
| 4635734 |
Boosterless perforating gun and method of assembly |
Jan. 13, 1987 |
| 4598771 |
Method and apparatus for firing a perforating gun and simultaneously recording the downhole pressure |
Jul. 8, 1986 |
| 4552234 |
Spiral gun apparatus |
Nov. 12, 1985 |
| 4527636 |
Single-wire selective perforation system having firing safeguards |
Jul. 9, 1985 |
| 4498391 |
Explosive mine breaking apparatus with arc-suppressing heat-dissipating fluid around the charge bodies |
Feb. 12, 1985 |
| 4496010 |
Single-wire selective performation system |
Jan. 29, 1985 |
| 4457383 |
High temperature selective fire perforating gun and switch therefor |
Jul. 3, 1984 |
| 4454814 |
Select-fire systems and methods for perforating guns |
Jun. 19, 1984 |
| 4324310 |
Seismic apparatus |
Apr. 13, 1982 |
| 4208966 |
Methods and apparatus for selectively operating multi-charge well bore guns |
Jun. 24, 1980 |
| 4194577 |
Method and apparatus for completing a slanted wellbore |
Mar. 25, 1980 |
| 4164886 |
Sealing projectile |
Aug. 21, 1979 |
| 4140188 |
High density jet perforating casing gun |
Feb. 20, 1979 |
| 4100978 |
Technique for disarming and arming electrically fireable explosive well tool |
Jul. 18, 1978 |
| 4089381 |
Chamber isolator and sealing means for borehole perforating tools |
May. 16, 1978 |
| 4066994 |
Well data telemetry by explosions |
Jan. 3, 1978 |
| 4051907 |
Selective firing system |
Oct. 4, 1977 |
| 4030557 |
Well drilling apparatus and method |
Jun. 21, 1977 |
| 4011815 |
Safe-handling arming apparatus for perforating guns |
Mar. 15, 1977 |
| 4007796 |
Explosively actuated well tool having improved disarmed configuration |
Feb. 15, 1977 |
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