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    Tubing expander and method of expanding, sealing and separating tubulars in a wellbore
    43.
    发明专利
    Tubing expander and method of expanding, sealing and separating tubulars in a wellbore 未知

    公开(公告)号：GB2415001A

    公开(公告)日：2005-12-14

    申请号：GB0511598

    申请日：2005-06-07

    Applicant: WEATHERFORD LAMB

    Inventor： HARRALL SIMON JOHN ,  MAGUIRE PATRICK G ,  COON ROBERT J ,  SIMPSON NEIL ANDREW ABERCROMBI

    IPC: E21B20060101 ,  E21B17/00 ,  E21B17/08 ,  E21B29/00 ,  E21B29/08 ,  E21B33/12 ,  E21B33/14 ,  E21B43/08 ,  E21B43/10 ,  E21B43/12

    Abstract: A tubing expander has radially extendable expansion members that are axially (longitudinally) spaced around its body in rows. The rows' expansion members can be deployed at different times. The tubing to be expanded has a weakened section or scribe which will break, snap or separate on expansion. Slips and sealing members between the expandable tubular and a wellbore casing allow the apparatus to act as a casing hanger and the casing above the weakened point can be removed; for example it can be lifted from the well using the tubing expander (figure 13D). The expandable tubular (315) can have a closed end (315B) such that it acts as a plug and allows two parts (305, 310) of a wellbore to be separated. The plug is removed by expanding the tubular at the weak point such that it breaks. Alternatively the weak points or scribes can be within the closed end of the plug so that it opens on expansion (figures 15A-I). Another embodiment includes temporarily covering or straddling a section of wellbore (figure 13).

    Expandable liner hanger with bypass
    47.
    发明专利
    Expandable liner hanger with bypass 未知

    公开(公告)号：GB2392189B

    公开(公告)日：2005-03-02

    申请号：GB0324564

    申请日：2002-07-15

    Applicant: WEATHERFORD LAMB

    Inventor： COON ROBERT J ,  SMITH RODDIE R ,  MAGUIRE PATRICK G

    IPC: E21B23/00 ,  E21B23/04 ,  E21B33/04 ,  E21B33/14 ,  E21B43/10

    Abstract: The present invention provides a liner hanger and a method of hanging a liner in a wellbore. In one aspect, a process for setting a liner in a wellbore is provided in which a tubular having a slip formed on an outer diameter of the tubular at a first location and a preformed bypass for circulating a fluid disposed at a second location is set and expanded into substantial contact with an inner diameter of the wellbore, a casing, or another liner. In another aspect, a process for setting a liner in a wellbore is provided in which a tubular having a slip formed on an outer diameter of the tubular at a first location is placed in the wellbore, a bypass for circulating a fluid is formed downhole, the liner is set and expanded into substantial contact with an inner diameter of the wellbore, a casing, or another liner. In yet another aspect, a process for creating a liner top seal is provided in which the liner is set by expanding a protrusion in an upper end of a tubular into substantial contact with an inner diameter of the wellbore, and the upper end of the tubular is then reformed and expanded into substantial contact with the inner diameter of the wellbore.

    Tube expander tool with radially extendable reinforced pads
    50.
    发明专利
    Tube expander tool with radially extendable reinforced pads 未知

    公开(公告)号：GB2396371A

    公开(公告)日：2004-06-23

    申请号：GB0328868

    申请日：2003-12-12

    Applicant: WEATHERFORD LAMB

    Inventor： TRAN KHAI ,  MAGUIRE PATRICK G ,  LAURITZEN J ERIC ,  PLUCHECK CLAYTON ,  VICKERS III CASWELL D

    IPC: E21B43/10 ,  E21B29/00

    Abstract: A tool for expanding tubing has reinforced pads 216 mounted on the outer surface of radially extendable pistons 220. The pads do not rotate and may be secured by locating members 232 inserted through brackets 230 into recesses 213 in the pad. The pads may be tapered and they incorporate reinforcing members such as discs 214 or strips (figure 7) of tungsten carbide or ceramic or are coated in a hard facing. The profile of the pad and piston combination is minimised in order to maximise the diameter of the internal bore (215, figure 10) of the tool and the pistons are disposed in recesses in the tool in communication with the main bore (figure 10). Fluid pressure in the bore is increased in order to extend the pistons and so expand surrounding tubing (figure 13).

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