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    REVERSE SLIDING SEAL FOR EXPANDABLE TUBULAR CONNECTIONS
    41.
    发明专利
    REVERSE SLIDING SEAL FOR EXPANDABLE TUBULAR CONNECTIONS 未知

    公开(公告)号：CA2881125A1

    公开(公告)日：2007-02-11

    申请号：CA2881125

    申请日：2006-08-09

    Applicant: WEATHERFORD LAMB

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

    IPC: E21B17/042 ,  E21B17/08 ,  F16L15/08

    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 a "groove" in a surface of the box member and a corresponding "rib" 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, an axial gap is formed between the pin elements of the mating tubulars.

    REVERSE SLIDING SEAL FOR EXPANDABLE TUBULAR CONNECTIONS
    42.
    发明专利
    REVERSE SLIDING SEAL FOR EXPANDABLE TUBULAR CONNECTIONS 未知

    公开(公告)号：CA2555709A1

    公开(公告)日：2007-02-11

    申请号：CA2555709

    申请日：2006-08-09

    Applicant: WEATHERFORD LAMB

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

    IPC: E21B17/08 ,  B21D39/04 ,  F16L13/16 ,  F16L15/04

    Abstract: An expandable threaded connection between segments of expandable tubulars th at provides a high bearing pressure seal at a specific area along the pin and b ox members is disclosed. The invention utilizes a "groove" in a surface of the box memb er and a corresponding "rib" 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 th e back of the box member. As the pin nose retracts, the rib on the pin nose moves backward until a portion of the rib contacts a portion of the groove in the box member. The point of contact between the rib and the groove creates a metal-to-metal seal between the pin and box members. Because the point of contact between the rib and the groove is a relatively small area, the force acting on the point of contact generates a high bearing pressure that is equal to or greater than the internal pressure within the expandable tubulars and, thus, generates a high pressure seal.

    SEAL ASSEMBLIES IN SUBSEA ROTATING CONTROL DEVICES
    46.
    发明专利
    SEAL ASSEMBLIES IN SUBSEA ROTATING CONTROL DEVICES 未知

    公开(公告)号：CA2850500A1

    公开(公告)日：2013-04-11

    申请号：CA2850500

    申请日：2012-10-05

    Applicant: WEATHERFORD LAMB

    Inventor： BAILEY THOMAS F ,  WAGONER DANNY W ,  BARRY ANDREW A W ,  HARRALL SIMON J ,  CHAMBERS JAMES W

    IPC: E21B33/08

    Abstract: Rotating control device related oilfield pressure control is accomplished by upper (26a) and lower (26b) seal members configured to seal around a tubular (40), a chamber (44) defined between the upper and lower seal members; and wherein fluid enters and/or exits the chamber via some device or structure (60, 70). Such a device or structure could be a relief valve (60), a first accumulator (70), a pressure control valve, an orifice, and/or a void space in a seal member in a location which contacts the tubular.

    METHOD AND APPARATUS FOR ISOLATING AND TREATING DISCRETE ZONES WITHIN A WELLBORE
    49.
    发明专利
    METHOD AND APPARATUS FOR ISOLATING AND TREATING DISCRETE ZONES WITHIN A WELLBORE 未知

    公开(公告)号：CA2697394A1

    公开(公告)日：2010-09-25

    申请号：CA2697394

    申请日：2010-03-22

    Applicant: WEATHERFORD LAMB

    Inventor： MURPHY ROBERT ,  INGRAM GARY D ,  HARRALL SIMON J

    IPC: E21B23/06 ,  E21B33/124

    Abstract: A method and apparatus for conducting a fracturing operation using a wellbore fracturing assembly. The assembly may be mechanically set and released from a wellbore using a coiled tubing string to conduct a fracturing operation adjacent an area of interest in a formation. The assembly may include an unloader for equalizing pressure between the assembly and the wellbore, a pair of spaced apart packers for straddling the area of interest, an injection port disposed between the packers for injecting fracturing fluid into the area of interest, and an anchor for securing the assembly in the wellbore. After conducting the fracturing operation, the assembly may be relocated to another area of interest to conduct another fracturing operation.

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