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Class Information
Number: 175/324
Name: Boring or penetrating the earth > With tool shaft detail > Means other than tool structure to induce fluent flow
Description: Apparatus including structure other than the structure of the tool which is specifically adapted to cause the circulation of flowable material (e.g., cuttings or drilling fluid) within the tool shaft or borehole.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7424922 |
Rotary valve for a jack hammer |
Sep. 16, 2008 |
| 7387176 |
Down hole air diverter |
Jun. 17, 2008 |
| 7383881 |
Stabiliser, jetting and circulating tool |
Jun. 10, 2008 |
| 7353887 |
Control systems and methods for active controlled bottomhole pressure systems |
Apr. 8, 2008 |
| 7350598 |
Downhole tool |
Apr. 1, 2008 |
| 7311148 |
Methods and apparatus for wellbore construction and completion |
Dec. 25, 2007 |
| 7296637 |
Oil drilling tool |
Nov. 20, 2007 |
| 7281592 |
Injecting a fluid into a borehole ahead of the bit |
Oct. 16, 2007 |
| 7243743 |
Drilling assembly and method for drilling a barehole into geological formations |
Jul. 17, 2007 |
| 7204327 |
Reverse circulation directional and horizontal drilling using concentric drill string |
Apr. 17, 2007 |
| 7174975 |
Control systems and methods for active controlled bottomhole pressure systems |
Feb. 13, 2007 |
| 7114581 |
Active controlled bottomhole pressure system & method |
Oct. 3, 2006 |
| 7108080 |
Method and apparatus for drilling a borehole with a borehole liner |
Sep. 19, 2006 |
| 7090023 |
Apparatus and methods for drilling with casing |
Aug. 15, 2006 |
| 7090039 |
Assembly for drilling low pressure formation |
Aug. 15, 2006 |
| 6966393 |
Drill drive steel |
Nov. 22, 2005 |
| 6918452 |
Drill string shutoff valve |
Jul. 19, 2005 |
| 6896075 |
Apparatus and methods for drilling with casing |
May. 24, 2005 |
| 6877571 |
Down hole drilling assembly with independent jet pump |
Apr. 12, 2005 |
| 6830107 |
Fluid flow switching device |
Dec. 14, 2004 |
| 6769498 |
Method and apparatus for inducing under balanced drilling conditions using an injection tool attached to a concentric string of casing |
Aug. 3, 2004 |
| 6550548 |
Rotary steering tool system for directional drilling |
Apr. 22, 2003 |
| 6520271 |
Fluid powered rotary drilling assembly |
Feb. 18, 2003 |
| 6497295 |
Torque limiting tool |
Dec. 24, 2002 |
| 6457541 |
Surface controlled by-pass valve |
Oct. 1, 2002 |
| 6367566 |
Down hole, hydrodynamic well control, blowout prevention |
Apr. 9, 2002 |
| 6283230 |
Method and apparatus for lateral well drilling utilizing a rotating nozzle |
Sep. 4, 2001 |
| 6263981 |
Deepwater drill string shut-off valve system and method for controlling mud circulation |
Jul. 24, 2001 |
| 6223840 |
Cutting bed impeller |
May. 1, 2001 |
| 6167974 |
Method of underbalanced drilling |
Jan. 2, 2001 |
| 6161635 |
Drilling system drive steel |
Dec. 19, 2000 |
| 6129160 |
Torque compensation apparatus for bottomhole assembly |
Oct. 10, 2000 |
| 6109374 |
Roller stabilizer |
Aug. 29, 2000 |
| 5984026 |
Pressure converter |
Nov. 16, 1999 |
| 5937957 |
Cutting bed impeller |
Aug. 17, 1999 |
| 5911285 |
Erosion resistant downhole mud diverter tool |
Jun. 15, 1999 |
| 5901796 |
Circulating sub apparatus |
May. 11, 1999 |
| 5884716 |
Constant bottom contact thruster |
Mar. 23, 1999 |
| 5787998 |
Down hole pressure intensifier and drilling assembly and method |
Aug. 4, 1998 |
| 5730222 |
Downhole activated circulating sub |
Mar. 24, 1998 |
| 5584352 |
Pneumatic drilling chip removal system and method |
Dec. 17, 1996 |
| 5553678 |
Modulated bias units for steerable rotary drilling systems |
Sep. 10, 1996 |
| 5526887 |
Device for drilling holes in the crust of the earth, especially for drilling oil wells |
Jun. 18, 1996 |
| 5443128 |
Device for remote actuating equipment comprising delay means |
Aug. 22, 1995 |
| 5407020 |
Pneumatic drilling chip removal system and method |
Apr. 18, 1995 |
| 5375669 |
Method and apparatus for cleaning a borehole |
Dec. 27, 1994 |
| 5366030 |
Hydraulic device for forming a cavity in a borehole |
Nov. 22, 1994 |
| 5363927 |
Apparatus and method for hydraulic drilling |
Nov. 15, 1994 |
| 5361857 |
Pressure converter |
Nov. 8, 1994 |
| 5343968 |
Downhole material injector for lost circulation control |
Sep. 6, 1994 |
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