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
Drochon Bruno, Kefi Slaheddine: Very low-density cement slurry. Schlumberger Technology, Schlumberger Services Petrol, Schlumberger Holdings, September 4, 2002: EP1236701-A1 (97 worldwide citation)

A cement slurry having a density between 750 kg/m and 1,000 kg/m, comprising a solid fraction comprising: either 75% - 90% (by volume) of lightweight particles having a mean particle size between 10 and 60 mu m; 10% - 25% (by volume) of Portland cement having a mean particle size of between 10 and 5 ...


4
Willberg Dean, Dismuke Keith: Self-destructing filter cake. Schlumberger Canada, Services Petroliers Schlumberger, Schlumberger Holdings, Schlumberger Technology, Sofitech, MENES Catherine, May 6, 2004: WO/2004/037946 (90 worldwide citation)

A composition and method are given for self-destructive fluid loss additives and filter cakes in wellbores and subterranean formations. The fluid loss additives and filter cakes are formed from a mixture of particulate solid acid-precursors, such as a polylactic acid or a polyglycolic acid, and part ...


5
Le, Roy Delage Sylvaine, Guillot Dominique, Dismuke Keith, Nelson Erik: Self adaptive cement systems. Services Petroliers Schlumberger, Schlumberger Technology, Schlumberger Holdings, Schlumberger Canada, Sofitech, Le, Roy Delage Sylvaine, Guillot Dominique, Dismuke Keith, Nelson Erik, MENES Catherine, November 25, 2004: WO/2004/101951 (89 worldwide citation)

A self-adaptive cement system includes cement, water and at least one additive that reacts or and expands in contact with oil and gas. Several chemical products have been identified including rubber alkylstyrene, polynorbornene, resins such precrosslinked substituted vinyl acrylate copolymers and di ...


6
Still John, Dismuke Keith, Frenier Wayne: Generating acid downhole in acid fracturing. Schlumberger Canada, Services Petroliers Schlumberger, Schlumberger Holdings, Schlumberger Technology, Sofitech, MENES Catherine, May 6, 2004: WO/2004/038176 (85 worldwide citation)

An acid fracturing method is provided in which the acid is generated in the fracture by hydrolysis of a solid acid-precursor selected from one or more than one of lactide, glycolide, polylactic acid, polyglycolic acid, a copolymer of polylactic acid and polyglycolic acid, a copolymer of glycolic aci ...


7
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 ...


8
Nichols Edward: A method for telemetering data between wellbores. Schlumberger Holdings, May 21, 2003: GB2382143-A (63 worldwide citation)

A method for telemetering data between wellbores comprises activating a first transmitter to generate a first magnetic field, the first transmitter being disposed on a drilling tool disposed in a first wellbore. A formation magnetic field induced by the first magnetic field is detected with at least ...


9
Babour Kamal, Rossi David, Chouzenoux Christian: Power and signal transmission using insulated conduit for permanent downhole installations. Schlumberger Technology, Schlumberger Services Petrol, Schlumberger Holdings, December 15, 1999: EP0964134-A2 (53 worldwide citation)

An apparatus and method is presented for establishing electrical connection to permanent downhole oilfield installations (26,27,28) using an electrically insulated conducting casing (22). Current is caused to flow in the casing by a source on the surface connected to the casing (22). One or more per ...


10
Kleinberg Robert L, Sezginer Abdurrahman: Pulsed nuclear magnetism tool for formation evaluation while drilling.. Schlumberger, Schlumberger Services Petrol, Schlumberger Technology, Schlumberger Holdings, February 2, 1994: EP0581666-A2 (51 worldwide citation)

The instruments of a pulsed nuclear magnetic resonance (NMR) device are included in a drill collar for evaluating earth formations. The resulting tool makes NMR measurements while the formation is being drilled.