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Wellbore casing and method of forming same

a casing and wellbore technology, applied in the direction of borehole/well accessories, insulation, mechanical equipment, etc., can solve the problems of undesirable leakage between the inside of the casing and the exterior of the casing, insufficient coupling between the threaded connections, and easy damage to the threaded connections

Inactive Publication Date: 2007-07-26
ENVENTURE GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent application is a continuation-in-part of several provisional patent applications filed between July 1999 and July 2003. These applications claim priority from provisional patent applications filed in July 2003. The technical effects of the patent text include the incorporation of the disclosure of several related patent applications, which are related to the present patent application. The patent text also describes the filing of several provisional patent applications, which are related to the present patent application. The provisional patent applications are incorporated by reference in their entirety.

Problems solved by technology

However, the coupling between the threaded connections is often insufficient to permit the transmission of energy through the casing sections from the surface to the downhole location.
Also, the threads of the threaded connections are easily damaged and, as such, may permit undesirable leakage between the inside of the casing and the exterior of the casing.
Further, if the connected casing sections are radially expanded and plastically deformed, the threaded connections can be compromised during the expansion process.

Method used

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  • Wellbore casing and method of forming same
  • Wellbore casing and method of forming same
  • Wellbore casing and method of forming same

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Embodiment Construction

[0016] Referring to FIG. 1, the reference numeral 10 refers to a well bore 10 that traverses a subterranean formation 12. A tubular casing section 14 is positioned within the well bore 10 and is shown partially for the convenience of presentation. As shown in FIG. 2, a tubular casing section 16 is also positioned in the bore and is adapted to be coupled to the casing section 14. To this end, the inner wall of an end portion of the casing section 14 is provided with threads 22, and the outer surface of the corresponding end portion of the casing section 16 is provided with complementary threads 24. Thus, the sections 14 and 16 can be threadedly engaged by applying torque to one member and rotating it in the proper direction relative to the other member. A small groove 16a is formed in the outer surface of the casing section 16 between the uppermost thread 24 and the non-threaded portion of the member, for reasons to be described. The outer diameter of the casing section 14 is the sam...

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Abstract

A method of forming a well bore casing for insertion in a well bore, according to which a first casing section is coupled to a second casing section and a seal is provided between the coupled portions of the sections.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] The present application is a continuation-in-part of U.S. application Ser. No. 10 / 525,402, attorney docket no. 25791.120.05, filed on Feb. 23, 2005, which is the National Stage patent application for PCT patent application serial number PCT / US2003 / 025676, attorney docket number 25791.120.02, filed on Aug. 18, 2003, which claimed the benefit of the filing dates of(1) U.S. provisional patent application Ser. No. 60 / 405,394, attorney docket no 25791.120, filed on Aug. 23, 2002, and co-pending U.S. provisional patent application No. 60 / 405,610, attorney docket 29751.119, filed on Aug. 23, 2002, the disclosure of which are incorporated herein by reference. [0002] This application is related to the following co-pending applications: (1) U.S. Pat. No. 6,497,289, which was filed as U.S. patent application Ser. No. 09 / 454,139, attorney docket no. 25791.03.02, filed on Dec. 3, 1999, which claims priority from provisional application 60 / 111,293, f...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B17/00E21B36/00
CPCE21B17/042E21B43/103F16L13/0236F16L13/0209E21B43/106
Inventor COSTA, SCOTTKENDZIORA, LARRY
Owner ENVENTURE GLOBAL TECH LLC