Shell Oil Comapny

Otis Engineering Corporation

Shell Offshore Inc.

James L Peterson

Romulo Gonzalez

George M Raulins

George G Grimmer

David T Waldo

William D Grimes

A method and apparatus for preventing casing damage due to high axial loading in a well as a result of compaction of the surrounding earth formations. The method consists of providing specially sized and located grooves on both the inside and outside diameters of a section of well casing. The grooves are designed and spacers may be used in some grooves to ensure symmetrical deformation of the casing when subjected to a compressive loading.

Method and apparatus for preventing casing damage due to formation

Apparatus for preventing casing damage due to formation compaction

A pipe joint in which a metal-to-metal seal is provided on the exterior of the pipe, a torque shoulder provides a further metal-to-metal seal and a still further seal is provided by a resilient ring. The box is protected against ballooning which might result in jump out of the threads by proportioning the thickness of the box at the point of seal at the maximum diameter of seal to the outer diameter of the box as compared to the full wall thickness of the pipe related to the outer diameter of the pipe.

Pipe joint

A self-draining composite plastic and steel thread protector for both the pin and box ends of oil field tubulars. The protector completely seals and prevents pressure differentials across the threads as well as provides openings for draining any moisture that may enter the tubular.

Weather-resistant and self-draining thread protector

Growing community of inventors

Gretna, LA, United States of America

James L Peterson