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Class Information
Number: 175/296
Name: Boring or penetrating the earth > Below-ground (1) hammer, or (2) impact members > Fluid-operated
Description: Apparatus in which (1) the hammer or impact device is acted upon and propelled by a body of fluid to deliver a blow (2) a body of fluid acts directly upon the hammer or impact device, or on holding means therefor to restrain said device against movement, and means to relieve the device or holding means from the influence of the restraining fluid to deliver a blow or (3) a means for holding the hammer or impact device against movement is released by a body of fluid to deliver a blow.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7353890 |
Down-the-hole hammer and components for a down-the-hole hammer, and a method of assembling a down-the-hole hammer |
Apr. 8, 2008 |
| 7293614 |
Multiple impact jar assembly and method |
Nov. 13, 2007 |
| 7290626 |
Transmission sleeve |
Nov. 6, 2007 |
| 7240744 |
Rotary and mud-powered percussive drill bit assembly and method |
Jul. 10, 2007 |
| 7234548 |
Hydraulic rotary-percussive hammer drill |
Jun. 26, 2007 |
| 7198120 |
Down-the-hole drill assembly |
Apr. 3, 2007 |
| 7163058 |
Hydraulic jar device |
Jan. 16, 2007 |
| 7159676 |
Fluid distributor device for down-hole-drills |
Jan. 9, 2007 |
| 7159674 |
Method and device for directional down-hole drilling |
Jan. 9, 2007 |
| 7104344 |
Percussion drilling head |
Sep. 12, 2006 |
| 7096980 |
Rotary impact well drilling system and method |
Aug. 29, 2006 |
| 7093671 |
Pneumatic rock-boring device and method for starting such a device |
Aug. 22, 2006 |
| 7090038 |
Bedrock drilling and excavating apparatus |
Aug. 15, 2006 |
| 7066279 |
Pneumatic ground piercing tool |
Jun. 27, 2006 |
| 7066251 |
Hydraulic jar lock |
Jun. 27, 2006 |
| 7048074 |
Control system for a percussion drive |
May. 23, 2006 |
| 7040417 |
Drilling systems |
May. 9, 2006 |
| 7040421 |
Liquid driven downhole drilling machine |
May. 9, 2006 |
| 7036611 |
Expandable reamer apparatus for enlarging boreholes while drilling and methods of use |
May. 2, 2006 |
| 7028785 |
Pneumatic impact piercing tool |
Apr. 18, 2006 |
| 7011156 |
Percussion tool and method |
Mar. 14, 2006 |
| 6994175 |
Hydraulic drill string |
Feb. 7, 2006 |
| 6923270 |
Pneumatic impact piercing tool |
Aug. 2, 2005 |
| 6892829 |
Two string drilling system |
May. 17, 2005 |
| 6889777 |
Implement for driving posts |
May. 10, 2005 |
| 6883618 |
Variable timing for front chamber of pneumatic hammer |
Apr. 26, 2005 |
| 6814165 |
Hard rock drilling device and method |
Nov. 9, 2004 |
| 6745836 |
Down hole motor assembly and associated method for providing radial energy |
Jun. 8, 2004 |
| 6742605 |
Percussion tool for generic downhole fluid motors |
Jun. 1, 2004 |
| 6712134 |
Modular bi-directional hydraulic jar with rotating capability |
Mar. 30, 2004 |
| 6702045 |
Drilling apparatus |
Mar. 9, 2004 |
| 6698537 |
Bit retention system |
Mar. 2, 2004 |
| 6675909 |
Hydraulic jar |
Jan. 13, 2004 |
| 6659202 |
Steerable fluid hammer |
Dec. 9, 2003 |
| 6588518 |
Drilling method and measurement-while-drilling apparatus and shock tool |
Jul. 8, 2003 |
| 6557652 |
Method for performing ground or rock work and hydraulic percussion device |
May. 6, 2003 |
| 6550554 |
Rock drill |
Apr. 22, 2003 |
| 6543557 |
Drill hammer assembly |
Apr. 8, 2003 |
| 6516902 |
Directional drilling system |
Feb. 11, 2003 |
| 6502650 |
Percussive down-the-hole hammer for rock drilling, and a drill bit used therein |
Jan. 7, 2003 |
| 6474421 |
Downhole vibrator |
Nov. 5, 2002 |
| 6467558 |
Multiple air hammer apparatus and excavating direction correcting method therefor |
Oct. 22, 2002 |
| 6467554 |
Quick reverse mechanism for pneumatic boring tool |
Oct. 22, 2002 |
| 6464023 |
Hydraulic in-the-hole percussion rock drill |
Oct. 15, 2002 |
| 6454026 |
Percussive down-the-hole hammer for rock drilling, a top sub used therein and a method for adjusting air pressure |
Sep. 24, 2002 |
| 6439318 |
Downhole apparatus |
Aug. 27, 2002 |
| 6397956 |
Directional drilling tool |
Jun. 4, 2002 |
| 6386301 |
Down-hole hammer |
May. 14, 2002 |
| 6371222 |
Hammer device |
Apr. 16, 2002 |
| 6371220 |
Pneumatically reversible ram drilling tool |
Apr. 16, 2002 |
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