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Protective Sleeve For Expandable Tubulars

a protective sleeve and expandable tubular technology, applied in the field of oil and gas exploration, can solve the problems of increased drilling rig time, increased cost of large borehole, and required equipment changes,

Inactive Publication Date: 2008-03-20
COSTA SCOTT +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides an assembly and method for forming a wellbore casing that includes a first tubular member, a second tubular member, and an external sleeve. The assembly is positioned within a borehole that traverses a subterranean formation and is then radially expanded and plastically deformed to form a fluid tight seal between the first and second tubular members. The technical effects include improved wellbore stability, reduced fluid leakage, and improved wellbore casing performance."

Problems solved by technology

Such a large borehole diameter involves increased costs due to heavy casing handling equipment, large drill bits and increased volumes of drilling fluid and drill cuttings.
Moreover, increased drilling rig time is involved due to required cement pumping, cement hardening, required equipment changes due to large variations in hole diameters drilled in the course of the well, and the large volume of cuttings drilled and removed.
Wellbore casings are then formed in the wellbore by radially expanding and plastically deforming tubular members that are coupled to one another by threaded connections existing methods for radially expanding and plastically deforming tubular members coupled to one another by threaded connections are not always reliable and do not always produce satisfactory results.
In particular, the threaded connections can be damaged during the radial expansion process.
Furthermore, the threaded connections between adjacent tubular members, whether radially expanded or not, are typically not sufficiently coupled to permit the transmission of energy through the tubular members from the surface to the downhole location.
Further, the damaged threads may permit undesirable leakage between the inside of the casing and the exterior of the casing.

Method used

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  • Protective Sleeve For Expandable Tubulars
  • Protective Sleeve For Expandable Tubulars
  • Protective Sleeve For Expandable Tubulars

Examples

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Embodiment Construction

[0018] Referring to FIG. 1, a first tubular member 10 that defines a passage 10a includes a pin member 12 that includes external threads 14 that engage internal threads 16 of a first box member 18 of an external sleeve 20. Internal threads 22 of a second box member 24 of the external sleeve 20 engage external threads 26 of a pin member 28 of a second tubular member 30 that defines a passage 30a. An internal sleeve 32 having an external flange 34 including upper and lower torque shoulders, 36 and 38, is coupled to the ends of the pin members, 12 and 28, of the first and second tubular members, 10 and 30, respectively. In an exemplary embodiment, the torque shoulders, 36 and 38, of the external flange 34 of the internal sleeve 32 engage and mate with corresponding torque shoulders, 40 and 42, provided on the ends of the pin members, 12 and 28, respectively, and the external surface of the external flange engages the internal surface of the external sleeve 20. The first tubular member ...

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Abstract

A protective sleeve for expandable tubulars.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] The present application is the National Stage patent application for PCT patent application serial number PCT / US2003 / 025707, attorney docket No. 25791.127.02, filed on Aug. 18, 2003, which claimed the benefit of the filing dates of (1) U.S. provisional patent application Ser. No. 60 / 412,196, attorney docket no 25791.127, filed on Sep. 20, 2002, the disclosures of which are incorporated herein by reference. [0002] The present application is a continuation-in-part of U.S. utility patent application Ser. No. ______, attorney docket No. 25791.120.______, filed on ______, which is a National Stage patent application of PCT patent application serial number PCT / US2003 / 025676, attorney docket No. 25791.120.02, filed on Aug. 18, 2003, which claimed the benefit of the filing dates of U.S. provisional patent application Ser. No. 60 / 405,394, attorney docket no 25791.120, filed on Aug. 23, 2002, which was a continuation-in-part of U.S. utility paten...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B43/10E21B19/16E21B23/02E21B17/042E21B17/08
CPCE21B17/042E21B17/08E21B43/106E21B43/105E21B43/103
Inventor COSTA, SCOTTRING, LEVMENCHACA, JOSE
Owner COSTA SCOTT