1
George Telfer, Edward Docherty Scott, Rae Andrew Youngor, James Edward Atkins: Downhole tool. Specialised Petroleum Services Group, Osha Liang, August 26, 2008: US07416029 (109 worldwide citation)

A downhole tool which can perform a task in a well bore, such as circulating fluid radially from the tool. The function is selectively performed by virtue of a sleeve moving within a central bore of the tool. Movement of the sleeve is effected by dropping a ball through a ball seat on the sleeve. Mo ...


2
George Telfer, Edward Docherty Scott: Valve seat. Specialised Petroleum Services Group, Osha • Liang, March 23, 2010: US07681650 (10 worldwide citation)

A ball valve seat (10) is disclosed which provides a temporary seal for a plug (40). The valve seat comprises a substantially cylindrical body (30) of a first volume, which defines a seating surface (34). A pressure differential is developed across the valve seat when the plug sealingly engages the ...


3
Andrew McPherson Downie, Guido Ernesto Pezzani, Edward Docherty Scott: Drilling turbine. Smith International, Alston & Bird, April 17, 2007: US07204326 (4 worldwide citation)

A turbine is disclosed which includes a turbine blade housing having an inner facing portion of a first material having a first coefficient of expansion, and a turbine blade body having an outer facing portion of a second coefficient of expansion greater than said first coefficient. In a preferred e ...


4
Andrew McPherson Downie, Edward Docherty Scott, Roy Powell: Downhole tool. Smith International, Winston & Strawn, August 7, 2007: US07252150 (3 worldwide citation)

A downhole tool including a selectively releasable joint, a downhole drilling assembly including the downhole tool, and a corresponding method. In one embodiment of the invention, a downhole drilling assembly includes a downhole tool having a first body and a second body mounted for relative rotatio ...


5
James Atkins, George Telfer, Edward Docherty Scott: Clamp. Specialised Petroleum Services Group, Osha Liang, March 5, 2013: US08388256 (2 worldwide citation)

A clamp (10) for holding two members together. The first member includes a recess into which a fastener is located. A bore is provided to the recess to allow a tool to be used to operate the fastener. The second member is arranged to accept the fastener and so join the members. The recess and bore a ...


6
James Edward Atkins, George Telfer, Edward Docherty Scott: Clamp. Specialised Petroleum Services Group, Osha Liang, August 9, 2016: US09410570

A clamp holds two members together. The first member includes a recess into which a fastener is located. A bore is provided to the recess to allow a tool to be used to operate the fastener. The second member is arranged to accept the fastener and so join the members. The recess and bore are sized to ...


7
Andrew McPherson Downie, Guido Ernesto Pezzani, Edward Docherty Scott: Drilling turbine. Alston & Bird, Bank Of America Plaza, October 14, 2004: US20040200642-A1

A turbine is disclosed which includes a turbine blade housing having an inner facing portion of a first material having a first coefficient of expansion, and a turbine blade body having an outer facing portion of a second coefficient of expansion greater than said first coefficient. In a preferred e ...


8
George Telfer, Edward Docherty Scott, Rae Andrew Younger, James Edward Atkins: Downhole tool. Perret Doise, A Professional Law Corporation, November 2, 2006: US20060243455-A1

A downhole tool which can perform a task in a well bore, such as circulating fluid radially from the tool. The function is selectively performed by virtue of a sleeve moving within a central bore of the tool. Movement of the sleeve is effected by dropping a ball through a ball seat on the sleeve. Mo ...


9
James Atkins, George Telfer, Edward Docherty Scott: Clamp. Specialised Petroleum Services Group, Osha Liang, June 19, 2008: US20080145139-A1

A clamp (10) for holding two members (12, 14) together. The first member includes a recess (30) into which a fastener (38) is located. A further access port (42) is provided to the recess to allow a tool (44) to be used to operate the fastener. The second member is arranged to accept the fastener an ...


10
George Telfer, Edward Docherty Scott: Valve Seat. Specialised Petroleum Services Group, Osha Liang Mi, December 27, 2007: US20070295507-A1

A ball valve seat (10) is disclosed which provides a temporary seal for a plug (40). The valve seat comprises a substantially cylindrical body (30) of a first volume, which defines a seating surface (34). A pressure differential is developed across the valve seat when the plug sealingly engages the ...