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Class Information
Number: 175/318
Name: Boring or penetrating the earth > With means movable relative to tool or shaft to control below-ground passage > Valve prevents upward flow
Description: Apparatus in which the means comprises a subsurface valve so mounted in the tool or tool shaft as to prevent the upward flow of fluent material in the tool or tool shaft.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7604063 |
Flow valve and method |
Oct. 20, 2009 |
| 7584801 |
Drill string flow control valves and methods |
Sep. 8, 2009 |
| 7281592 |
Injecting a fluid into a borehole ahead of the bit |
Oct. 16, 2007 |
| 7204327 |
Reverse circulation directional and horizontal drilling using concentric drill string |
Apr. 17, 2007 |
| 7165634 |
Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
Jan. 23, 2007 |
| 7140455 |
Valve method for drilling with casing using pressurized drilling fluid |
Nov. 28, 2006 |
| 7108080 |
Method and apparatus for drilling a borehole with a borehole liner |
Sep. 19, 2006 |
| 7100710 |
Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
Sep. 5, 2006 |
| 7090033 |
Drill string shutoff valve |
Aug. 15, 2006 |
| 7017671 |
Mud saver valve |
Mar. 28, 2006 |
| 7017682 |
Drill string shutoff valve |
Mar. 28, 2006 |
| 7013997 |
Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
Mar. 21, 2006 |
| 6962215 |
Underbalanced well completion |
Nov. 8, 2005 |
| 6918452 |
Drill string shutoff valve |
Jul. 19, 2005 |
| 6732819 |
Mudsaver valve with retrievable inner sleeve |
May. 11, 2004 |
| 6732804 |
Dynamic mudcap drilling and well control system |
May. 11, 2004 |
| 6520271 |
Fluid powered rotary drilling assembly |
Feb. 18, 2003 |
| 6408957 |
Sealed bearing roller cone bit having anti-plugging device |
Jun. 25, 2002 |
| 6318482 |
Blowout preventer |
Nov. 20, 2001 |
| 6289999 |
Fluid flow control devices and methods for selective actuation of valves and hydraulic drilling tools |
Sep. 18, 2001 |
| 6263987 |
One pass drilling and completion of extended reach lateral wellbores with drill bit attached to drill string to produce hydrocarbons from offshore platforms |
Jul. 24, 2001 |
| 6250383 |
Lubricator for underbalanced drilling |
Jun. 26, 2001 |
| 6241032 |
One-way drill string clutch |
Jun. 5, 2001 |
| 6216799 |
Subsea pumping system and method for deepwater drilling |
Apr. 17, 2001 |
| 6209663 |
Underbalanced drill string deployment valve method and apparatus |
Apr. 3, 2001 |
| 6167974 |
Method of underbalanced drilling |
Jan. 2, 2001 |
| 6158531 |
One pass drilling and completion of wellbores with drill bit attached to drill string to make cased wellbores to produce hydrocarbons |
Dec. 12, 2000 |
| 6152232 |
Underbalanced well completion |
Nov. 28, 2000 |
| 5979572 |
Flow control tool |
Nov. 9, 1999 |
| 5894897 |
Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
Apr. 20, 1999 |
| 5860478 |
Sub-sea test tree apparatus |
Jan. 19, 1999 |
| 5794729 |
Coker unit drilling equipment |
Aug. 18, 1998 |
| 5645132 |
Drill bit having springless check valve and method of blocking backflow during drilling |
Jul. 8, 1997 |
| 5310005 |
Flapper valve assembly with floating hinge |
May. 10, 1994 |
| 5145005 |
Casing shut-in valve system |
Sep. 8, 1992 |
| 5119891 |
Adaptor for drilling strings with controllable air passage |
Jun. 9, 1992 |
| 5058684 |
Drill pipe bridge plug |
Oct. 22, 1991 |
| 5020611 |
Check valve sub |
Jun. 4, 1991 |
| 5012876 |
Rotary drill bit providing separation of liquid from gas |
May. 7, 1991 |
| 4991669 |
Device for controlling the passage of a flushing medium in impact machines |
Feb. 12, 1991 |
| 4907660 |
Interchangeable sectional mining drill and bolt driver system |
Mar. 13, 1990 |
| 4823890 |
Reverse circulation bit apparatus |
Apr. 25, 1989 |
| 4700924 |
Pressure energized rotary hydraulic seal |
Oct. 20, 1987 |
| 4682661 |
Drilling apparatus |
Jul. 28, 1987 |
| 4660596 |
Inside B.O.P. valve |
Apr. 28, 1987 |
| 4457384 |
Water separator and backflow valve |
Jul. 3, 1984 |
| 4456217 |
Kelly valving apparatus |
Jun. 26, 1984 |
| 4407362 |
Flow control apparatus for wells |
Oct. 4, 1983 |
| 4403628 |
Inside blowout preventer |
Sep. 13, 1983 |
| 4393940 |
Retrievable float valve assembly |
Jul. 19, 1983 |
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