1
Metcalfe Paul David, Simpson Neil Andrew Abercrombi: Bore-drilling bit and bore isolation expander for single trip use.. Petroline Wellsystems, Astec Dev, September 6, 2000: GB2347445-A (166 worldwide citation)

A drill bit 22 for mounting on a drill string 10 including a section of expandable tubing 18 and a tubing expander 20. Rotation of the drill bit allows the drill string to advance through the bore 12, followed by location of the tubing 18 to overlap the existing casing 14 at 46. Tubing expander 20 i ...


2
Metcalfe Paul David, Simpson Neil Andrew Abercrombi: A deformable downhole sealing device. Petroline Wellsystems, Astec Dev, August 16, 2000: GB2346632-A (115 worldwide citation)

A method of providing a downhole seal (eg. a packer), in a wellbore, between inner tubing 11 (eg. production tubing) and outer tubing 16 comprises: providing an intermediate tubing section 18 defining a seal arrangement for engaging with the inner tubing 11. The intermediate tubing 18 is radially pl ...


3
Metcalfe Paul David, Simpson Neil Andrew Abercrombi: Tubing hanger. Petroline Wellsystems, Astec Dev, July 5, 2000: GB2345308-A (90 worldwide citation)

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 lower end of the casing; and radial ...


4
Metcalfe Paul David, Simpson Neil Andrew Abercrombi: Method and apparatus for expanding a liner patch. Weatherford Lamb, October 10, 2001: EP1141515-A1 (65 worldwide citation)

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 lower end of the casing; and plasti ...


5
Simpson Neil Andrew Abercrombi, Haugen David M: Downhole apparatus and method for expanding a tubing. Weatherford Lamb, February 18, 2004: GB2391886-A (47 worldwide citation)

A method of expanding tubing comprises locating an expansion tool in a section of tubing to be expanded, applying a fluid pressure to the tubing to create a fluid pressure expansion force and induce a hoop stress in the tubing, and applying a mechanical expansion force to the tubing via the expansio ...


6
Roy William Ball, Simpson Neil Andrew Abercrombi: Cyclical expansion tool. Weatherford Lamb, February 9, 2005: GB2404680-A (46 worldwide citation)

An expander tool (16) for expanding a tubular (12), such as a sand screen, includes an expansion element (40, fig 2), such as an expandable elastomeric tube, which can be supplied with hydraulic pressure. In use, the expansion element (40, fig 2) is inflated to apply an expansion force to the tubula ...


7
Simpson Neil Andrew Abercrombi: Shaft alignment for downhole drilling. Astec Dev, May 28, 1997: GB2307537-A (17 worldwide citation)

A rotary shaft assembly (10; 100; 200) including a mechanism by which one part (34) of the shaft (32) rotates about a rotation axis (18) which is controllably deviated from the rotation axis (22) of the other part (36) of the shaft (32). The angular extent of deviation (18-40+22-40) is controllably ...


8
Aldaz Walter, Duggan Andrew Michael, Whanger James K, Simpson Neil Andrew Abercrombi, Harrall Simon John: Expandable tubular including an inflatable seal. Weatherford Lamb, August 18, 2004: GB2398313-A (16 worldwide citation)

A packer (32) if formed from an expandable tubular base pipe (34) and has attached an inflatable seal element (36). The seal element (36) has a number of chambers (38) which enable it to be inflated. The seal element (36) may also be filled with a material that sets following inflation to maintain t ...


9
Simpson Neil Andrew Abercrombi, Mackay Alexander Craig, Cowman Robert: Expandable tubular with lip seal. Weatherford Lamb, February 9, 2005: GB2404677-A (15 worldwide citation)

A seal arrangement comprises an expandable inner tubular 10; and an outer tubular 12. At least one of the tubulars has a lip seal 16. The lip seal forms a ring around the tubular, with the lip itself extending in an axial direction. The lip seal may form a metal-to-metal seal. The seal may be provid ...


10
Metcalfe Paul David, Simpson Neil Andrew Abercrombi: Drilling method. Weatherford Lamb, February 9, 2005: EP1505251-A2 (14 worldwide citation)

A drilling method comprises advancing a drill string through a cased section of a wellbore. The drill string comprises an expandable tubular, a drill assembly having a drill bit, and a tubing expander. The expandable tubular is advanced through the wellbore below the cased section, and at least a po ...