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| Number | Title | Issue Date |
| 7637330 | Casing bottom hole assembly retrieval process A process for retrieving a bottom hole assembly through a casing string may include: installing a casing string in a borehole, the casing string including a bottom hole assembly releasably engaged thereto and moveable through an inner diameter of the casing string; ... | 12/29/2009 |
| 7377324 | Pipe handling device, method and system 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 dr... | 05/27/2008 |
| 7347286 | Drill string valve assembly 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... | 03/25/2008 |
| 7328742 | Seal cup for a wellbore tool and method 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 se... | 02/12/2008 |
| 7287584 | Anchoring device for a wellbore tool 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 ca... | 10/30/2007 |
| 7270189 | Top drive assembly 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 housin... | 09/18/2007 |
| 7237607 | Tubular stabbing protector and method 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 ... | 07/03/2007 |
| 7219727 | Wear resistant tubular connection 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. ... | 05/22/2007 |
| 7140443 | Pipe handling device, method and system 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 dr... | 11/28/2006 |
| 7140455 | Valve method for drilling with casing using pressurized drilling fluid 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 tim... | 11/28/2006 |
| 7124825 | Casing wear band and method of attachment 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 di... | 10/24/2006 |
| 7108080 | Method and apparatus for drilling a borehole with a borehole liner 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 ... | 09/19/2006 |
| 7090004 | Cement float 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;... | 08/15/2006 |
| 7082997 | Pipe centralizer and method of attachment 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 ... | 08/01/2006 |
| 7044241 | Method for drilling with casing 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)... | 05/16/2006 |
| 7021382 | Downhole axial force generating tool 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 hou... | 04/04/2006 |
| 7013992 | Borehole stabilization while drilling 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 wal... | 03/21/2006 |
| 6899356 | Tubular connection floating shoulder ring 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 ... | 05/31/2005 |
| 6742584 | Apparatus for facilitating the connection of tubulars using a top drive 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 hy... | 06/01/2004 |
| 6705413 | Drilling with casing 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 di... | 03/16/2004 |
| 6679335 | Method for preparing casing for use in a wellbore 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 wellbor... | 01/20/2004 |
| 6585052 | Casing centralizer 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 oute... | 07/01/2003 |
| 6513223 | Method for installing a centralizer retaining collar and outer sleeve 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 oute... | 02/04/2003 |
| 6311792 | Casing clamp 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.... | 11/06/2001 |
| 6227306 | Pipe gripping device 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 co... | 05/08/2001 |
| 6199641 | Pipe gripping device 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 co... | 03/13/2001 |
