中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

143 records (took 0.024 seconds)

    FULL BORE LINED WELLBORES
    12.
    发明专利
    FULL BORE LINED WELLBORES 未知

    公开(公告)号：CA2517883C

    公开(公告)日：2010-01-12

    申请号：CA2517883

    申请日：2004-03-05

    Applicant: WEATHERFORD LAMB

    Inventor： CARTER THURMAN B ,  BRUNNERT DAVID J ,  HAUGEN DAVID M

    IPC: E21B7/20 ,  E21B10/32 ,  E21B41/00 ,  E21B43/10

    Abstract: Embodiments of the present invention generally provide methods and apparatus for forming a tubular-lined wellbore which does not decrease in diameter wit h increasing depth or length. In one aspect, a portion of a second casing (220 ) is expanded into a portion of a first casing (204) having a larger inner diameter than the remaining portion of the first casing string. In another aspect, the portion of the second casing is expanded into a portion of the first casing having a compressible member (505) therearound. In another aspect, a lined lateral wellbore may be constructed by forming a lateral wellbore extending from a main wellbore lined with casing. A diameter of at least a portion of the lateral wellbore may be expanded. An expandable tubul ar element may be run into lateral wellbore and expanded to have an inner diameter equal to or larger than an inner diameter of the main wellbore casing. Embodiments provide a fluid path around casing before sealing the casing within a wellbore or within a well casing, even after the casing has been hung within the wellbore or from the well casing.

    SINGLE-DIRECTION CEMENTING PLUG
    13.
    发明专利
    SINGLE-DIRECTION CEMENTING PLUG 未知

    公开(公告)号：CA2456505C

    公开(公告)日：2008-07-15

    申请号：CA2456505

    申请日：2004-01-30

    Applicant: WEATHERFORD LAMB

    Inventor： GIROUX RICHARD L ,  GALLOWAY GREGORY GUY ,  BRUNNERT DAVID J ,  JORDAN CHRIS

    IPC: E21B33/16 ,  E21B33/134

    Abstract: The present invention generally relates to apparatus and methods for completing a well. Particularly, the present invention relates to a single- direction plug for use with cementing applications and with drilling with casing applications. One embodiment comprises a cement plug for installation in a wellbore casing. The plug includes a body and gripping members for preventing movement of the body in a first axial direction relative to the casing. The plug further comprises a sealing member for sealing a fluid path between the body and the casing. The plug is movable in a second axial direction with fluid pressure but is not movable in the first direction due to fluid pressure.

    Full bore lined wellbores
    15.
    发明专利
    Full bore lined wellbores 未知

    公开(公告)号：GB2433276B

    公开(公告)日：2007-10-17

    申请号：GB0624782

    申请日：2004-03-05

    Applicant: WEATHERFORD LAMB

    Inventor： CARTER THURMAN B ,  BRUNNERT DAVID J ,  HAUGEN DAVID M

    IPC: E21B43/10 ,  E21B7/20 ,  E21B10/32 ,  E21B41/00

    Abstract: Embodiments of the invention relate to an assembly for forming a cased well. The assembly may include an undercut drillable cementing shoe with a casing string connection at a first end. The shoe includes external tubing that forms a second end of the shoe and has a first section defining an enlarged inner diameter relative to a second section of the external tubing. The assembly may also include an earth removal member coupled to the second end of the shoe. The first section of the shoe is disposed between the earth removal member and the second section of the shoe. In another embodiment, the assembly may include a casing string having a first portion with a larger inner diameter than a second portion. The assembly may also include an earth removal member coupled to an end of the casing string. The first portion of the casing string is disposed between the earth removal member and the second portion of the casing string.

    APPARATUS AND METHODS FOR UTILIZING A DOWNHOLE DEPLOYMENT VALVE
    18.
    发明专利
    APPARATUS AND METHODS FOR UTILIZING A DOWNHOLE DEPLOYMENT VALVE 未知

    公开(公告)号：CA2674434A1

    公开(公告)日：2006-12-21

    申请号：CA2674434

    申请日：2006-06-13

    Applicant: WEATHERFORD LAMB

    Inventor： LUKE MIKE A ,  HAUGEN DAVID ,  BANSAL R K ,  BRUNNERT DAVID J ,  PAVEL DAVID ,  NOSKE JOE

    IPC: E21B21/08 ,  E21B21/10 ,  E21B34/06 ,  E21B34/14 ,  E21B41/00

    Abstract: Methods and apparatus for utilizing a downhole deployment valve (DDV) to isolate a pressure in a portion of a bore are disclosed. The DDV system can include fail safe features such as selectively extendable attenuation members for decreasing a falling object's impact, a normally open back-up valve member for actuation upon failure of a primary valve member, or a locking member to lock a valve member closed and enable disposal of a shock attenuating material on the valve member. Actuation of the DDV system can be electrically operated and can be self contained to operate automatically downhole without requiring control lines to the surface. Additionally, the actuation of the DDV can be based on a pressure supplied to an annulus.

Patent Agency Ranking