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US 12,296,412 B2Granted
Work string tubing connection restoration
AssigneePostle Industries, Inc.
InventorsRobert F. Miller, James D. Allen, Steven L. Stefancic
Life of this patent
Estimating the term…
Abstract
A hardfacing metal composition and method of restoring worn work string tubing by application of a hardfacing metal to the worn regions of the work string tubing.
Claims13
A restored worn tubing that can be reused in well operations;
- said worn tubing comprising a tube body, a box located at one end of said tube body and a threaded pin member located at an opposite end of said tube body;
- said box has a base body with a base outer surface;
- said base body has a base body front end, a base body back end, a cavity and threads located in said cavity;
- said base body has a maximum diameter that is greater than a diameter of said tube body that is located adjacent to said base body;
- said threaded pin member includes an upset portion, a rear end of said upset portion that is connected to said tube body, and a threaded region that extends from a front end of said upset portion;
- said upset portion has a maximum diameter that is greater than a diameter of said threaded region of said pin member;
- said maximum diameter of said upset portion is greater than said diameter of said tube body that is located adjacent to said upset portion;
- and
- wherein said tubing includes I) a first layer of a hardfacing metal on said base outer surface of said box such that an outer diameter of said box is about 90-200% an OEM outer diameter of said box;
- said base outer surface has a diameter that is less than 90% of an OEM diameter of said box prior to said first layer of said hardfacing metal being applied to said base outer surface;
- and wherein said box is not disfigured or damaged after application of said hardfacing metal to said base outer surface of said box;
- and/or II) a first layer of a hardfacing metal on an upset outer surface said upset portion of said threaded pin member such that an outer diameter of said upset portion is about 90-200% an OEM outer diameter of said upset portion;
- said upset portion of said threaded pin member is less than 90% of an OEM outer diameter of said upset portion prior to said first layer of said hardfacing metal being applied to said upset portion;
- and wherein said threaded region is not damaged after application of said hardfacing metal to said upset outer surface said upset portion of said threaded pin member;
- and
- wherein said first layer of said hardfacing metal has been applied to said outer surface of said box from a direction from a front end of said box towards a back end of said box, and/or said first layer of said hardfacing metal has been applied to said outer surface of said upset portion of said threaded pin member in a direction from a front end of said upset portion to a back end of said upset portion.
13 more elements
A method for repairing a worn tubing;
- said method comprises the steps of:
- providing said worn tubing;
- said worn tubing comprising a tube body, a box located at one end of said tube body and a threaded pin member located at an opposite end of said tube body;
- said box has a base body with a base outer surface;
- said base body has a base body front end, a base body back end, a cavity and threads located in said cavity;
- said base body has a maximum diameter that is greater than a diameter of said tube body that is located adjacent to said base body;
- said threaded pin member includes an upset portion, a rear end of said upset portion that is connected to said tube body, and a threaded region that extends from a front end of said upset portion;
- said upset portion has a maximum diameter that is greater than a diameter of said threaded region of said pin member;
- said maximum diameter of said upset portion is greater than said diameter of said tube body that is located adjacent to said upset portion;
- and
- applying a hardfacing metal to (i) said base body outer surface in a direction from said base body front end towards said base body back and wherein at least a portion of said hardfacing metal is located above said threads in said cavity of said base body, and/or (ii) said upset outer surface in a direction from a front end of said upset portion to a back end of said upset portion and wherein said hardfacing metal is spaced from said threaded pin member.
8 more elements
Dependencies are inferred from the claim text.