1
Johnson Craig D, Hackworth Matthew R, Bixenman Patrick W: Connector for tubulars. Schlumberger Holdings, July 31, 2002: GB2371574-A (111 worldwide citation)

A connector for tubulars (160, 162), particularly for connecting expandable tubulars formed of bistable cells, includes a number of extending insertion portions (168) which engage with corresponding extending receiving portions (170). The receiving portions (170) have a narrow outer opening (174) wi ...


2
Johnson Craig D, Bixenman Patrick W: Packer formed from a tubular having bistable cells. Schlumberger Holdings, July 17, 2002: GB2371064-A (107 worldwide citation)

A packer (80) for use in a well bore is constructed from a tubular (90) having a region (80) formed from a number of bistable cells (23, 83). The portion (80) of the tubular (90) which is expanded to form the packer, has a seal (84) thereon. The seal (84) may be formed from an elastomer and a resin ...


3
Hart Barrie, Johnson Craig D, Schetky L Mcd: Bi-stable expandable device and method for expanding such a device. Schlumberger Services Petrol, Schlumberger Technology, Schlumberger Holdings, July 17, 2002: EP1223305-A2 (64 worldwide citation)

An expandable device comprising a plurality of expandable cells (23). The cells may be bistable cells or other types of cells that are expanded from a contracted position towards an expanded position. Additionally, the cells may be combined with locking mechanisms to hold the structure in an expande ...


4
Wetzel Rodney J, Pai Sudhir, Smith David R, Howard Peter V, Johnson Craig D, Langlais Michael, Danos Jake A, Bixenman Patrick W: A method for monitoring an operation in a well. Schlumberger Holdings, September 24, 2003: GB2386625-A (27 worldwide citation)

A method for monitoring an operation in a well 10 which comprises injecting material into the well, monitoring a characteristic of the well and determining the placement position of the material in the well from the monitored characteristic. The material may be a gravel slurry, a proppant, a fractur ...


5
Schetky L Mcd, Johnson Craig D, Hackworth Matthew R, Bixenman Patrick W: Expandable bistable tubing. Schlumberger Holdings, April 24, 2002: GB2368082-A (20 worldwide citation)

An expandable tube (24) for use in a wellbore is stable in collapsed (fig 4B) and expanded (fig 4A) form. The tube (24) is formed from a number of bistable cells (23), the design being such that when being expanded by use of an expansion mandrel and such like, less force is required when compared to ...


6
Johnson Craig D, Oddie Gary Martin: Flow control apparatus and method for a deviated wellbore. Schlumberger Holdings, December 18, 2002: GB2376488-A (17 worldwide citation)

An apparatus 10 and method for controlling fluid production in a deviated wellbore 18 which comprises a flow pipe 12 disposed in a horizontal portion of the wellbore and a plurality of flow control valves 24 disposed along the length of the flow pipe, each valve providing hydraulic communication bet ...


7
Price Smith Colin, Johnson Craig D, Bixenman Patrick W, Hackworth Matthew R, Sinclair Garry J: An expandable well completion. Schlumberger Holdings, May 14, 2003: GB2381811-A (15 worldwide citation)

A well completion 10 for zonal isolation of rock formations comprises expandable tubing sections 12 and unexpanded tubing sections 14, where each unexpanded tubing section 14 is placed between two expandable tubing sections 12. The expandable sections 12 are aligned with separate perforated zones 26 ...


8
Johnson Craig D, Hackworth Matthew R, Wang David Wei: Control of flow into completion base pipe. Schlumberger Holdings, July 24, 2002: GB2371319-A (15 worldwide citation)

In lateral wellbores, the flow rate from the formation into the completion base pipe 28 is not always equal along the length of the completion. There tend to be higher flow rates at the 'heel' of the lateral wellbore, than at the 'toe'. By varying the effective area of fluid communication between th ...


9
Wetzel Rodney J, Pai Sudhir, Smith David R, Howard Peter V, Johnson Craig D, Langlais Michael, Danos Jake A, Bixenman Patrick W: A method for monitoring a well operation. Schlumberger Holdings, June 1, 2005: GB2408531-A (9 worldwide citation)

A method for monitoring a well operation comprises running a service tool 164 into the well, delivering a material through the service tool, and monitoring a characteristic of the material with the service tool.


10
Schetky L Mcd, Johnson Craig D, Hackworth Matthew R, Bixenman Patrick W: Maintaining axial length during tubular expansion. Schlumberger Holdings, February 9, 2005: GB2404683-A (9 worldwide citation)

A method of expanding a tubular (24) which can include a sandscreen (74) in a wellbore allows for expansion whilst maintaining a constant axial length of the tubular (24). This is achieved by the tubular (24) being constructed from expandable cells (23) formed with a number of longitudinal bars (21, ...