公开(公告)号：BRPI0921167A2

公开(公告)日：2016-02-23

申请号：BRPI0921167

申请日：2009-11-17

Applicant: WEATHERFORD LAMB

Inventor： ODELL ALBERT C II ,  TWARDOWSKI ERIC M ,  FEASEY GUY F ,  TREVINO JOSE A ,  LE TUONG THANH ,  XU WEI JAKE

IPC: E21B7/20 ,  E21B7/06 ,  E21B17/07

公开(公告)号：AU2013222122A1

公开(公告)日：2014-08-28

申请号：AU2013222122

申请日：2013-02-22

Applicant: WEATHERFORD LAMB

Inventor： TREVINO JOSE A

IPC: E21B7/20 ,  E21B4/00 ,  E21B33/14

Abstract: A releasable latch system used to releasably couple a surface casing to a conductor casing. In one embodiment, a latch assembly for coupling a first tubular to a second tubular includes a mandrel having a plurality of key slots; a housing for receiving the mandrel; a plurality of keys radially movable into engagement or out of engagement with a respective key slot; a collet configured to engage the housing and a respective key; and a retainer ring configured to hold the plurality of keys in engagement with the respective key slot.

公开(公告)号：AU2013222197A1

公开(公告)日：2014-08-28

申请号：AU2013222197

申请日：2013-02-22

Applicant: WEATHERFORD LAMB

Inventor： TWARDOWSKI ERIC M ,  ODELL II ALBERT C ,  TREVINO JOSE A

IPC: E21B7/20 ,  E21B4/00 ,  E21B33/14

Abstract: In one embodiment, a casing bit drive assembly may be used with a casing drilling system. The casing bit drive assembly may include one or more of the following: a retrievable drilling motor; a decoupled casing sub; a releasable coupling between the motor and casing bit; a releasable coupling between the motor and casing; a cement diverter; and a casing bit.

公开(公告)号：CA2873799A1

公开(公告)日：2010-05-20

申请号：CA2873799

申请日：2009-11-17

Applicant: WEATHERFORD LAMB

Inventor： TREVINO JOSE A ,  ODELL ALBERT C II ,  TWARDOWSKI ERIC M ,  LE TUONG THANH ,  XU WEI JAKE ,  FEASEY GUY F

IPC: E21B19/06 ,  E21B7/20 ,  E21B17/07

Abstract: A method of forming a wellbore includes providing a drilling assembly comprising one or more lengths of casing and an axially retracting assembly having a first tubular; a second tubular at least partially disposed in the first tubular and axially fixed thereto; and a support member disposed in the second tubular and movable from a first axial position to a second axial position relative to the second tubular, wherein, in the first axial position, the support member maintains the second tubular axially fixed to the first tubular, and in the second axial position, allows the second tubular to move relative to the first tubular; and an earth removal member disposed below the axially retracting assembly. The method also includes rotating the earth removal member to form the wellbore; moving the support member to the second axial position; and reducing a length of the axially retracting assembly.