| Patent Number |
Title Of Patent |
Date Issued |
| 7624820 |
Method for drilling with casing |
December 1, 2009 |
| A method for drilling boreholes using casing as the drill string and for removing a drilling assembly from the wellbore while leaving the casing in the well bore. In the method, the drilling assembly is prepared for removal from the wellbore by launching a release tool and manipulating |
| 7604057 |
Incremental U-tube process to retrieve of bottom hole assembly during casing while drilling oper |
October 20, 2009 |
| A bottom hole assembly is retrieved through a casing string by lightening the density of the drilling fluid in the casing string above the bottom hole assembly to a lesser density than the drilling fluid in the casing string annulus. The bottom hole assembly moves upward in the casing |
| 7575061 |
Wireline entry sub and method of using |
August 18, 2009 |
| A wireline entry sub includes a body having an upper end, a lower end and a longitudinal, center axis therebetween, the body adapted for connection below a top drive to a wellbore string of tubulars; a slot on the body open a depth from a body outer surface to at least the longitudinal |
| 7552778 |
Seal cup for a wellbore tool and method |
June 30, 2009 |
| A seal cup and method is disclosed that can be used on a wellbore tool. The seal cup includes an external circumferential seal land adjacent the cup lip and an outer surface capable of permitting drainage away from the seal land of fluids, which may seep past the seal land. This acts aga |
| 7520343 |
Retrievable center bit |
April 21, 2009 |
| A retrievable center bit for use with a tubular including an inner bore and a drill shoe cutter mounted thereon. The retrievable center bit may include a body positionable in the bore of the tubular and including an upper end, a lower end and a side outer surface extending therebetween. |
| 7484559 |
Method for drilling and casing a wellbore with a pump down cement float |
February 3, 2009 |
| A cement float collar is disclosed that can be positioned downhole and used in a wellbore completion operation after drilling a well-bore with casing. A wellbore drilling and completion method is also disclosed. The cement float collar is made for pumping downhole and into engagement wit |
| 7475742 |
Method for drilling with casing |
January 13, 2009 |
| A method for drilling boreholes using casing as the drill string and for removing a drilling assembly from the wellbore while leaving the casing in the well bore. In the method, the drilling assembly is prepared for removal from the wellbore by launching a release tool and manipulating |
| 7472763 |
Wear resistant tubular connection |
January 6, 2009 |
| A wear resistant casing connection including a wear resistant portion on its exterior surface is taught. A casing connection having a controlled bend angle is also taught. |
| 7428927 |
Cement float and method for drilling and casing a wellbore with a pump down cement float |
September 30, 2008 |
| A cement float collar is made for pumping downhole and into engagement with a groove formed in the casing, called the profile nipple. As such, no restriction is needed in the casing for accepting or latching the float collar and the portion of casing including the groove can be insta |
| 7370712 |
Under reamer |
May 13, 2008 |
| An under reamer for expanding a borehole through an earthen formation is taught. The under reamer includes: a mandrel including an end for connection into a drill string and an opposite end and a housing including an inner bore, telescopically disposed over the mandrel and axially mo |
| 7347286 |
Drill string valve assembly |
March 25, 2008 |
| A drill string valve assembly includes a tubular valve body, including an outer surface and an inner bore for housing a valve mechanism to control fluid flow through the bore; and an axial load support releasably securable to the outer surface of the valve body, the axial load support |
| 7328742 |
Seal cup for a wellbore tool and method |
February 12, 2008 |
| A seal cup and method is disclosed that can be used on a wellbore tool. The seal cup includes an external circumferential seal land adjacent the cup lip and an outer surface capable of permitting drainage away from the seal land of fluids, which may seep past the seal land. This acts aga |
| 7287584 |
Anchoring device for a wellbore tool |
October 30, 2007 |
| An anchoring device for tool is disclosed that can be positioned downhole and used in casing. The anchoring device can have an architecture that supports installation by running downhole and into engagement with a recess formed in the casing. The anchoring device can support the use of |
| 7270189 |
Top drive assembly |
September 18, 2007 |
| A top drive assembly for wellsite operations may include a quill, a swivel including a swivel housing and a swivel bearing therein in which the quill is supported, a drive system for applying torque to the quill, and link arm hangers extending from the swivel housing and formed to accept |
| 7237607 |
Tubular stabbing protector and method |
July 3, 2007 |
| A tubular stabbing protector includes: a plurality of body sections together forming a first opening and a second opening, the first opening sized to be secured over a pin end of an oilfield tubular and the second opening sized to fit over a connection to which the pin end of the tub |
| 7219727 |
Wear resistant tubular connection |
May 22, 2007 |
| A wear resistant casing connection including a wear resistant portion on its exterior surface is taught. A casing connection having a controlled bend angle is also taught. |
| 7140455 |
Valve method for drilling with casing using pressurized drilling fluid |
November 28, 2006 |
| A valve (30), a drill string valve assembly (10) and a method of drilling using compressed fluid as a drill drilling fluid are described. The valve and valve assembly (10) may be used in order to prevent escape of compressed fluid during the time that a connection is being made into the |
| 7140443 |
Pipe handling device, method and system |
November 28, 2006 |
| A pipe handling device for mounting to use with a top drive and possibly a pipe engaging apparatus, includes a link arm having a first end pivotally connectable to move with the top drive and an outboard end pivotally connectable to a pipe elevator segment, and a drive system to drive th |
| 7124825 |
Casing wear band and method of attachment |
October 24, 2006 |
| A crimpable wear band (105) tool has been invented for installation on casing (6), used in well bore drilling. A wear band (105) is provided having a cylindrical body which when coaxially placed over a pipe and substantially radially inwardly displaced at a plurality of points (i.e. |
| 7108080 |
Method and apparatus for drilling a borehole with a borehole liner |
September 19, 2006 |
| A method for drilling a borehole includes; providing a drill string of drill pipe including a center bore, a distal end, a bit assembly at the distal end; hanging a liner from the drill string, thereby forming an annular space between the drill string and the liner and with the bit a |
| 7090004 |
Cement float |
August 15, 2006 |
| A cement float for use in a wellbore tubing string includes: a mandrel having a bore extending from a first end to a second end including a fluid flow control device therein, and outer surfaces defining a tapering outer diameter from the first end to the second end; an outer lock sleeve |
| 7082997 |
Pipe centralizer and method of attachment |
August 1, 2006 |
| A crimpable centralizer has been invented for installation on pipe, such as would be useful in well bore drilling and casing operations. The present invention provides a centralizer having a cylindrical body which when coaxially placed over a pipe and substantially radially inwardly |
| 7044241 |
Method for drilling with casing |
May 16, 2006 |
| A method for drilling boreholes using casing (16) as the drill string and for advancing a casing string toward the bottom of the borehole is described. In the method, the drilling assembly (26) is used as a guide over which the drill string (16) is advanced toward the bottom of the b |
| 7021382 |
Downhole axial force generating tool |
April 4, 2006 |
| An axial force generating tool for applying a force on a structure positioned within a borehole is taught. The tool includes a housing (19) sized to fit within the borehole in which the tool is required to act; an outer seal (38) disposed about the housing and selected to create a seal |
| 7013992 |
Borehole stabilization while drilling |
March 21, 2006 |
| A method for drilling in unconsolidated formation is taught. In particular, a method for borehole stabilization in an unconsolidated formation includes providing a drill string; rotating the drill string to drive a drill bit to drill a borehole having a borehole wall; driving the dri |
| 6899356 |
Tubular connection floating shoulder ring |
May 31, 2005 |
| A shoulder ring (10) for installing in the J-space between the installed pin ends within a coupling collar is taught having a body with a central opening therethrough, a first end face (12) on the body, an opposite end face (14) on the body, an inner surface (16) adjacent the central ope |
| 6742584 |
Apparatus for facilitating the connection of tubulars using a top drive |
June 1, 2004 |
| An apparatus for facilitating the connection of tubulars using a top drive, which apparatus comprises a body (2; 102) connectable to said top drive, said body (2; 102) comprising at least one gripping element (5; 105) radially displaceable by hydraulic or pneumatic fluid to drivingly eng |
| 6705413 |
Drilling with casing |
March 16, 2004 |
| A method and apparatus for drilling directional wellbores using a casing string as a drill stem is taught. A retrievable bit is mounted at an end of the casing string and either a mud motor with a bent housing and/or bent sub or a rotary steerable tool is used to direct the bit to drill |
| 6679335 |
Method for preparing casing for use in a wellbore |
January 20, 2004 |
| A method for preparing casing for use in a wellbore such as for example, in preparation, for use to line a borehole through a formation or to act as a drill string and thereafter to remain in hole. In the method, a device supporting the use of the wellbore casing is crimped onto the oute |
| 6585052 |
Casing centralizer |
July 1, 2003 |
| A tubing centralizer for borehole drilling disclosed. The centralizer includes a retaining collar and an outer sleeve. In a method for installing the centralizer onto a joint of tubing, the retaining collar is mounted onto the joint of tubing and the outer sleeve is installed thereov |
| 6513223 |
Method for installing a centralizer retaining collar and outer sleeve |
February 4, 2003 |
| A tubing centralizer for borehole drilling disclosed. The centralizer includes a retaining collar and an outer sleeve. In a method for installing the centralizer onto a joint of tubing, the retaining collar is mounted onto the joint of tubing and the outer sleeve is installed thereov |
| 6311792 |
Casing clamp |
November 6, 2001 |
| A clamp for gripping casing strings is disclosed. A series of radially arranged spring biased slips are mounted in a housing attached to a top drive. A hydraulic system is used to release the slips from the gripping position upon a casing string. |
| 6227306 |
Pipe gripping device |
May 8, 2001 |
| A pipe gripping device is taught which is useful for moving pipe into and/or out of a well. The pipe gripping device includes a first set of slips for holding a pipe in a pipe light condition and a second set of slips for holding a pipe in a pipe heavy condition. The second set of sl |
| 6199641 |
Pipe gripping device |
March 13, 2001 |
| A pipe gripping device is taught which is useful for moving pipe into and/or out of a well. The pipe gripping device includes a first set of slips for holding a pipe in a pipe light condition and a second set of slips for holding a pipe in a pipe heavy condition. The second set of sl |
