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US 6,619,400 B2Granted
Apparatus and method to complete a multilateral junction
AssigneeWeatherford/Lamb, Inc.
InventorCharles G. Brunet
Life of this patent
Estimating the term…
Abstract
An apparatus for locating a first tubular with respect to a window in a second tubular including at least one member extending from an outer surface of a liner for aligning the liner with respect to a window in a casing of a primary wellbore. In one aspect, the invention includes a key and a no-go obstruction to rotationally and axially align the apparatus with the window.
Claims56
An apparatus for locating a first tubular with respect to a window in a second tubular, comprising:
- at least one member extending in a direction away from an outer wall of the first tubular for aligning the first tubular with respect to the window of the second tubular, and at least one additional member extending in a direction away from a second outer wall of the first tubular, the second outer wall being substantially, circumferentially opposite the first outer wall.
A method of releasing a tie back assembly with a removable inner tube and key, comprising:
- applying a first downward force to a central mandrel to break a first shearable connection between the mandrel and a sleeve therearound;
- moving the mandrel downwards to cause a spring biased key to retract;
- rotating the mandrel a least 15 degrees whereby the key no longer intersects a window in a tubular therearound;
- applying an upwards force on the mandrel to break a second shearable connection between the sleeve and an inner tube therearound;
- and
- removing the mandrel, inner tube and sleeve from the wellbore.
3 more elements
A tie back assembly comprising:
- a hanger for hanging the assembly in a central wellbore;
- a packer for sealing an annular between the assembly and the central wellbore;
- a tubular housing disposed between the hanger and an upper end of a liner string, the tubular housing having an access window formed therein to provide access between an upper an lower portions of the primary wellbore;
- a key located on an outer wall of the tubular housing for aligning the assembly with respect to a casing window from which the lateral wellbore extends;
- and
- an inner tube dispose coaxially within the housing, the inner tube removable therefrom with a run-in string and having a no-go obstruction formed on an outer wall thereof, the obstruction extending through the access window of the liner.
3 more elements
A method of using a tie back assembly, comprising:
- running a liner with the assembly disposed thereupon into a central wellbore;
- causing the liner to extend through a window formed in casing and into a lateral wellbore extending therefrom;
- locating a member formed on the liner in a mating formation formed on the window in order to orient the liner in respect to the window;
- and
- fixing the liner in the lateral wellbore.
2 more elements
A method of using a tie back assembly, comprising:
- running a liner with the assembly disposed thereupon into a central wellbore;
- causing the liner to extend through a window formed in casing and into a lateral wellbore extending therefrom;
- locating a member formed on the liner in a mating formation formed on the window in order to orient the liner in respect to the window;
- and
- fixing the liner in the lateral wellbore such that the upper end of the liner does not extend into the central wellbore.
2 more elements
A method of using a tie back assembly, comprising:
- running a liner with the assembly disposed thereupon into a central wellbore;
- causing the liner to extend through a window formed in casing and into a lateral wellbore extending therefrom;
- locating a member formed on the liner in a mating formation formed on the window in order to orient the liner in respect to the window;
- fixing the liner in the lateral wellbore such that the upper end of the liner extends into the central wellbore;
- and
- expanding the portion of the liner which extends into the central wellbore such that the outer surface of the liner contacts the inner surface of the central wellbore with sufficient force to prevent movement or rotation of the portion of the liner within the central wellbore.
3 more elements
A method of using a tie back assembly, comprising:
- running a lateral liner with the assembly disposed thereupon into a central wellbore;
- causing the lateral liner to extend through a window formed in casing and into a lateral wellbore extending therefrom;
- locating a member formed on the lateral liner in a mating formation formed on the window in order to orient the lateral liner in respect to the window;
- and
- fixing the liner in the lateral wellbore.
2 more elements
Dependencies are inferred from the claim text.