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| Number | Title | Issue Date |
| 7216726 | Downhole fluid-tight flexible joint A downhole tool comprises a joint, and a resilient member 65 which extends through the joint and provides a restoring force which tends to strengthen the joint. The joint may comprise a flex coupling 61 which allows limited articulation of the joint. F... | 05/15/2007 |
| 7172027 | Expanding tubing A method of expanding tubing downhole comprises providing a section of expandable tubing of a first diameter, and axially compressing the tubing to induce buckling, such that the buckled portion describes a larger second diameter. The resulting diametric expansion m... | 02/06/2007 |
| 7168497 | Downhole sealing A method of providing a downhole seal, such as a packer, in a drilled bore between inner tubing and outer tubing comprises: providing an intermediate tubing section defining a seal arrangement for engaging with the inner tubing; and radially plastically deforming th... | 01/30/2007 |
| 7004257 | Apparatus and methods for separating and joining tubulars in a wellbore The present invention provides methods and apparatus for cutting tubulars in a wellbore. In one aspect of the invention, a cutting tool having radially disposed rolling element cutters is provided for insertion into a wellbore to a predetermined depth where a tubula... | 02/28/2006 |
| 6976539 | Tubing anchor A method of installing a liner in a drilled bore below a section of bore previously lined with casing comprises the steps of: running a length of liner into the bore such that at least an upper end of the liner is positioned in overlapping relation with at least a l... | 12/20/2005 |
| 6923261 | Apparatus and method for expanding a tubular A method of isolating a section of downhole tubing comprises: running a length of expandable tubing (20) into a tubing-lined borehole (12, 14) and positioning the expandable tubing (20) across a section of tubing to be isolated; deforming at lea... | 08/02/2005 |
| 6920935 | Expandable downhole tubing A tubing coupling method is provided. In one aspect, the method comprises providing a length of expandable tubing and a length of larger diameter non-expanding tubing, connecting an end portion of the expandable tubing to an end portion of the non-expanding tubing, ... | 07/26/2005 |
| 5813286 | Support arm A support arm has stationary support structure, a boom, a knuckle and an auxiliary jib section. The boom connects at one end to the support structure and at an opposite end to one end of the knuckle, and an opposite end of the knuckle connects to one end ... | 09/29/1998 |
| 4243112 | Vibrator-assisted well and mineral exploratory drilling, and drilling apparatus Well and exploratory drilling apparatus whose rotary motion is modified by a vibrator to provide lateral movement of its bit. There is also disclosed a universal movement which enables such action to occur in a steerable assembly, while providing a passag... | 01/06/1981 |
| 3958649 | Methods and mechanisms for drilling transversely in a well Two methods and four mechanisms are disclosed for drilling at right angles to a vertical well at any location or depth in the well. The drilling mechanisms each comprises a flexible spring biased telescopic fluid conduit having a turbodrill on the lower e... | 05/25/1976 |
