Schlumberger Technology Corporation

Dowell, a Division of Schlumberger Technology Corporation

Claude J Vercaemer

Jean-Louis Pessin

Erik Rhein-Knudsen

Laurent P Prouvost

Arthur W Milne

Hubertus V Thomeer

Robert M Sorem

Demosthenis Georgeou Pafitis

Jean Pierre Poyet

Geoffrey C Maitland

Stephen Nigel Davies

Brian W Darling

An expandable tubing ( ) for a well bore hole ( ) in which selected length portions ( ) are weakened by a slot configuration (FIGS. ) to obtain predetermined expansion characteristics. The slot configurations are tailored or selected for a predetermined bore hole length and may be expanded to different radial diameters to conform generally to the peripheral contour of the bore hole. Tubing portions ( ) between the slotted length potions ( ) are unweakened.

Expandable tubing for a well bore hole and method of expanding

In one embodiment, the invention relates to a method or process, useful in cementing a well, especially a hydrocarbon well, which is characterized by the use of increased external and internal diameter liners, the method being characterized by provision and use of a novel liner and liner-tool assembly. Novel liner apparatus, a liner-tool assembly, and a fluid circulating tool are also disclosed.

Method and apparatus for cementing a well

A method of cementing a well permitting a reduction in the degree of diameter reduction of casing or liners required, and not requiring excessively large initial conductor casing, is described. The method is characterized by provision of an enlarged wellbore and a novel liner structure which is adapted for expansion of a reduced diameter section thereof downhole, providing, before expansion of the section, unimpeded flow of fluid from the enlarged wellbore during cementing and close fit of the expanded section with the casing or preceding liner, after cementing is completed and expansion of the section. A novel well liner structure and novel well liner expansion means are disclosed.

Selective zonal isolation of oil wells

Growing community of inventors

Houston, TX, United States of America

Claude J Vercaemer