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：CA2844909C

公开(公告)日：2016-07-12

申请号：CA2844909

申请日：2009-11-10

Applicant: WEATHERFORD/LAMB INC

Inventor： XU WEI JAKE ,  ODELL ALBERT C II ,  HARRALL SIMON J ,  REDLINGER THOMAS M ,  VREELAND CHRISTOPHER M ,  ANTOINE ANDREW ,  BRUNNERT DAVID J ,  LAIRD TOMMY ,  MOODY MICHAEL ,  TILTON FREDERICK T

IPC: E21B10/32

Abstract: Embodiments of the present invention generally relate to extendable cutting tools for use in a well bore. In one embodiment, a tool for use in a wellbore includes a tubular body having a bore therethrough, an opening through a wall thereof, and a connector at each longitudinal end thereof; and an arm. The arm is pivotally connected to a first piston and rotationally coupled to the body, is disposed in the opening in a retracted position, and is movable to an extended position where an outer surface of the arm extends outward past an outer surface of the body. The tool further includes the first piston. The first piston is disposed in the body bore, has a bore therethrough, and is operable to move the arm from the retracted position to the extended position in response to fluid pressure in the piston bore exceeding fluid pressure in the opening. The tool further includes a lock operable to retain the first piston in the retracted position; and a second piston operably coupled to the lock.

公开(公告)号：CA2871928C

公开(公告)日：2016-09-13

申请号：CA2871928

申请日：2009-05-05

Applicant: WEATHERFORD/LAMB INC

Inventor： REDLINGER THOMAS M ,  KOITHAN THOMAS ,  VREELAND CHRISTOPHER M ,  HEISKELL WES ,  ANTOINE ANDREW ,  MCINTIRE SCOTT

IPC: E21B7/06 ,  E21B21/10 ,  E21B23/02 ,  E21B29/06 ,  E21B31/107 ,  E21B31/113

Abstract: Embodiments of the present invention generally relate to signal operated tools for milling, drilling, and/or fishing operations. In one embodiment, a mud motor for use in a wellbore includes: a stator; a rotor, the stator and rotor operable to rotate the rotor in response to fluid pumped between the rotor and the stator; and a lock. The lock is operable to: rotationally couple the rotor to the stator in a locked position, receive an instruction signal from the surface, release the rotor in an unlocked position, and actuate from the locked position to the unlocked position in response to receiving the instruction signal.