Work string tubing connection restoration

A method for repairing a worn work string tubing to minimize or prevent damage to said worn work string tubing;

• said method comprises:
• i. cutting off or otherwise removing a front-end portion of said box and removing a front portion of said threaded region of said threaded pin member;
• ii. I) applying at least one layer of said hardfacing metal to an outer surface of said box, and wherein said hardfacing metal is spaced from said threads in said cavity of said box, and II) applying at least one layer of said hardfacing metal to an outer surface of an upset portion of said threaded pin member;
• iii. further processing said box, and said threaded pin member by grinding, polishing, deburing, and/or heat treating said at least one layer of hardbanding after said step of applying;
• and,
• iv. repairing said threads or rethreading new threads in said cavity of said box and on said threaded region of said threaded pin member after said step of applying.

A method for repairing work string tubing that is used in well operations, and wherein said work string tubing is worn;

• said method comprising the steps of:
• a) providing a worn work string tubing that is worn;
• said worn work string tubing comprising a body, a box located at one end region of said body, and a threaded pin member having a threaded region located at an other end region of said 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;
• at least a portion of said base outer surface has a diameter that is less than an OEM diameter of said box, and at least a portion of an upset portion of said threaded pin member has a diameter that is less than an OEM outer diameter of said upset portion;
• and
• b) repairing said worn work string tubing to form a repaired work string tubing by I) applying at least one layer of hardfacing metal to said base outer surface of said box such that an outer diameter of said box that includes said hardfacing metal is 90-200% said OEM outer diameter of said box, and/or II) applying at least one layer of said hardfacing metal to said upset portion of said threaded pin member such that an outer diameter of said upset portion that includes said hardfacing metal is 90-200% an OEM outer diameter of said upset portion;
• and,
• wherein said step of repairing is selected to minimize or prevent a) softening or disfiguring of said box, b) damage to said threads in said cavity of said box, c) formation of holes in said box, d) formation of holes in said body of said work string tubing, and/or e) damage to said threaded region of said threaded pin member;
• said step of repairing further includes:
• i) cutting off or otherwise removing a front end portion of said box prior to applying at least one layer of said hardfacing metal to said box, and/or removing a front portion of said threaded region of said threaded pin member prior to applying at least one layer of said hardfacing metal to said threaded pin member;
• ii) applying at least one layer of said hardfacing metal to said outer surface of said box in a direction from a front end of said box towards a back end of the said box, and/or applying at least one layer of said hardfacing metal to an 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;
• iii) processing said box and/or said threaded pin member by grinding, polishing, deburring, and/or heat treating after applying said hardfacing metal to said outer surface of said box and/or to said outer surface of said upset portion of said threaded pin member;
• and/or
• iv) repairing said threads or rethreading new threads in said cavity of said box after applying at least one layer of said hardfacing metal to said outer surface of said box, and/or repairing said threaded region of said threaded pin member after applying at least one layer of said hardfacing metal to said outer surface of said upset portion of said threaded pin member.

A restored worn tubing that can be reused in well operations;

• said worn tubing comprising a tube body, a box located at one end region of said tube body and a threaded pin member located at an opposite end region 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 90-200% an OEM outer diameter of said box;
• said base outer surface has a diameter that is less than 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 damaged after application of said hardfacing metal to said base outer surface of said box;
• and 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 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 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.