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| Number | Title | Issue Date |
| 7159669 | Internal riser rotating control head A holding member provides for releasably positioning a rotating control head assembly in a subsea housing. The holding member engages an internal formation in the subsea housing to resist movement of the rotating control head assembly relative to the subsea housing.... | 01/09/2007 |
| 7156170 | Methods and apparatus for severing nested strings of tubulars An apparatus and method for use in severing casing as it is pulled from a wellbore. In one aspect, the apparatus, includes a clamping assembly, a drilling assembly and a cutting assembly. The apparatus is disposed at the end of a telescopic arm, with the components ... | 01/02/2007 |
| 6119775 | Inflatable downhole seal A sealing apparatus for use in a well in connection with oil or gas production includes a seal and a pressure compensator. The seal is an inflatable, balloon-type well seal. The seal has a first cavity and is bears against an inner surface of a tubular su... | 09/19/2000 |
| 6116336 | Wellbore mill system A milling system has been invented for milling an opening in a tubular in a tubular string in a wellbore extending down from a surface of the earth, the milling system, in one aspect, has a whipstock connected to an anchor assembly and a mill apparatus re... | 09/12/2000 |
| 6082451 | Wellbore shoe joints and cementing systems A new method for introducing wellbore cement into a wellbore shoe joint has been invented, the shoe joint having a hollow tubular body, the shoe joint containing an amount of wellbore fluid, the shoe joint disposed in a wellbore cementing system between a... | 07/04/2000 |
| 6076606 | Through-tubing retrievable whipstock system The present invention, in certain embodiments, discloses a whipstock system which is hydraulically settable in a tubular or wellbore and mechanically retrievable. In one aspect it is a "through-tubing" system. In certain aspects systems according to this ... | 06/20/2000 |
| 6035939 | Wellbore anchor system The present invention, in certain embodiments, includes a whipstock system with a body having an upper concave and a lower end, anchor apparatus on the lower end of the body, the anchor apparatus having a movable member releasably connected to the lower e... | 03/14/2000 |
| 6026675 | Method and apparatus for testing threaded joints and threaded members A method for testing threaded joints and threaded members comprising the steps of lubricating one or both threaded members, making up a joint, subjecting the joint to a pressure differential, and attempting to detect flow through said joint, characterized... | 02/22/2000 |
| 6024168 | Wellborne mills & methods A wellbore mill has been invented that has a body having a top and a bottom and a first fluid flow channel extending longitudinally therethrough from top to bottom, the first fluid flow channel having an upper end and a lower end, the lower end of the fir... | 02/15/2000 |
| 6024169 | Method for window formation in wellbore tubulars New systems and methods have been invented for explosively forming openings, ledges, windows, holes, and lateral bores through tubulars such as casing, which openings may, in cerain aspects, extend beyond the casing into a formation through which a wellbo... | 02/15/2000 |
| 6000472 | Wellbore tubular compensator system New joint compensator and systems and methods of their use have been invented which, in one aspect are useful for compensating for the weight of a first joint and at least one subsequent joint, the first joint to be supported above the at least one subseq... | 12/14/1999 |
| 5984005 | Wellbore milling inserts and mills An array of cutting inserts has been invented having a plurality of adjacent inserts, each insert comprising a body having a top surface, a bottom, and a base, and a plurality of spaced-apart chipbreaking indentations in the top surface of the body, and a... | 11/16/1999 |
| 5865253 | Wellbore overshot An overshot for engaging and retrieving a collapsed coiled tubing in a wellbore, has been invented. In one aspect the overshot has a body member with a top, a bottom, and a body channel therethrough from top to bottom, the body member having a slip chambe... | 02/02/1999 |
| 5787978 | Multi-face whipstock with sacrificial face element The present invention discloses, in certain preferred aspects, a whipstock with a body with a top, a bottom, and a cavity in the body, a sacrificial element secured to the top of the body, the sacrificial element having at least one surface for abutment b... | 08/04/1998 |
| 5769166 | Wellbore window milling method A wellbore milling system has been invented which includes, in one aspect, a lower window mill, and two watermelon mills connected above the window mill. In one aspect the topmost of the two watermelon mills has a plurality of cutting blades with rough dr... | 06/23/1998 |
| 5669443 | Shoe for used in the construction of oil and gas wells A shoe for attachment to a length of casing for use in a wellbore comprises a body portion attachable to casing, and a nose portion rotatably mounted on the body portion. A casing string with a plurality of casing sections and such a shoe.... | 09/23/1997 |
