Schlumberger Technology Corporation

Michael Shepherd

Olivier Sindt

Lawrence Lee

Joachim Sihler

Lawrence C Lee

Hossein Akbari

Robert Ian Robson

Norman Ward

The present invention relates to a resilient material lined stator and method of forming. A method of forming a resilient material lined stator can include disposing a resilient material tubewith a profiled helical inner surfaceinto the bore of a body. A cast materialcan be disposed therebetween. The cast materialcan bond to the bodyto form a resilient material lined stator or the bodycan be removed. The cast materialcan include a conduitor conductorextending therethrough. The cast materialcan include a pathwayformed therethrough. The resilient material can be an elastomer.

Controlled thickness resilient material lined stator and method of forming

A steerable system comprises a first rotatable housing and a second rotatable housing connected to the first rotatable housing by an adjustable joint. A cam member is held against rotation while in use. Cam follower means are cooperable with the cam member and moveable to drive the second rotatable housing for movement relative to the first rotatable housing about the adjustable joint.

Steerable system

A skinned rotoror skinned statorof a progressive cavity apparatus is described. A rotorcan be skinned by threading a sleevewith a profiled helical outerand profiled helical innersurface onto a corewith a profiled helical outer surface. A rotor () can also be skinned by inserting a non-helical core () into a non-helical longitudinal bore () of a sleeve () with a profiled helical outer surface (). A statorcan be skinned by threading a tubular linerwith profiled helical innerand profiled helical outersurfaces into a profiled helical boreof a tube. A stator () can also be skinned by inserting a tubular liner () with a non-helical outer surface () into a non-helical bore () of a tube ().

Skinning of progressive cavity apparatus

Cast material rotor () with profiled helical outer surface (). Cast material layer () can be disposed between core () and tube (). Profiled helical outer surface () can be in tubeor cast material layer, respectively. Method of forming rotorcan include filling void between outer surfaceof coreand longitudinal boreof tubehaving profiled helical outer surfacewith cast materialin fluid state, and solidifying cast material. Tubecan be disposed within profiled helical boreof mold, e.g., before solidifying cast material. Method of forming rotorcan include filling void between outer surfaceof coreand profiled helical borein moldwith cast materialin fluid state, solidifying cast materialto impart profiled helical outer surfacethereto, and removing moldfrom cast material

Rotor of progressive cavity apparatus and method of forming

Method of forming controlled thickness resilient material lined stator

A drilling apparatus controls or eliminates reaction torque from drill bits thereby preventing loss of penetration due to undesired rotation of the drilling apparatus or controls drilling direction by intentionally manipulating reaction torque thereby inducing desired drill bit walk. The drilling apparatus has a concentrically divided drill bit in which an inner drill bit rotates simultaneously in the opposite direction from an outer drill bit. The inner drill bit can be moved axially forward from or back toward the outer drill bit. Forces produced by the inner and outer drill bits are controlled to eliminate or adjust reaction torque.

Growing community of inventors

Stroud, United Kingdom

Michael Shepherd