公开(公告)号：CA2881130C

公开(公告)日：2016-08-30

申请号：CA2881130

申请日：2006-08-09

Applicant: WEATHERFORD/LAMB INC

Inventor： HASHEM GHAZI J ,  HARRALL SIMON J ,  RING LEV M ,  EVANS MERLE E

IPC: E21B17/042 ,  E21B17/08

Abstract: An expandable threaded connection between segments of expandable tubulars that provides a high bearing pressure seal at a specific area along the pin and box members is disclosed. The invention utilizes first and second "grooves" in a surface of the box member and corresponding first and second "ribs" on the pin nose. The radial expansion of the tubulars causes the pin to become shorter in length, thereby causing the pin nose to retract from the back of the box member. As the pin nose retracts, a high bearing pressure, metal-to-metal seal, is formed between elements of the mating tubulars.

公开(公告)号：CA2791599C

公开(公告)日：2017-09-19

申请号：CA2791599

申请日：2012-10-03

Applicant: WEATHERFORD/LAMB INC

Inventor： HASHEM GHAZI J ,  BRUNNERT DAVID ,  KOCHERA JOHN W ,  MITCHELL MARK ,  FRILOT MELISSA A ,  REDLINGER THOMAS M

IPC: E21B17/00 ,  E21B17/06

Abstract: The present invention describes a drill pipe in which various sections of the pipe are strengthened, or their shape is altered, in order to improve the wear and buckle resistance of the drill pipe. The sections are strengthened using various hardening methods such as heat treatment processes and/or expansion techniques. A sleeve can also be applied to the strengthened portions. Surface enhancers, such as hardbanding, can be applied to the strengthened portions or the sleeve in order to provide abrasion resistance or to reduce friction.

公开(公告)号：CA2881342C

公开(公告)日：2016-08-02

申请号：CA2881342

申请日：2006-08-09

Applicant: WEATHERFORD/LAMB INC

Inventor： HASHEM GHAZI J ,  HARRALL SIMON J ,  RING LEV M ,  EVANS MERLE E

IPC: E21B17/042 ,  E21B17/08

Abstract: An expandable threaded connection between segments of expandable tubulars that provides a high bearing pressure seal at a specific area along the pin and box members is disclosed. A first tubular segment has a pin member and a second tubular segment has a box member. The pin member includes threads, a pin nose and a groove formed in the pin nose. The box member includes a rib and threads that engage with the pin member. The rib can rest within, and contact, a portion of the groove when the threaded connection is made up prior to expansion. The groove is sized to allow the rib to move within the groove, from a contact point at a first end of the groove to a second contact point at a second end of the groove, resulting from axial movement of the pin nose during radial expansion of the connection.