Expandable apparatus for drift and reaming borehole
First Claim
Patent Images
1. An expandable reamer shoe for mounting on a casing string, comprising:
- a body upon which are arranged a plurality of reaming members, wherein;
said reamer shoe is substantially constructed from a relatively soft drillable material,the plurality of reaming members are moveable between a first and second position,the reaming members are closed in a first position and expanded in a second position,the reaming members are operable in the second position to remove a portion of a wellbore, wherein the reaming members move from the first position to the second position by virtue of an activating piston, andeach of the reaming members has a hardened material applied to an outer surface.
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Accused Products
Abstract
An expandable reamer shoe is provided for use with expandable casing in a borehole. The reamer shoe has a number of reaming members in the form of blades which remain closed against the body of the shoe when inserted through casing, and can then be expanded to underream below the casing. Additionally, the expandable reamer shoe is made substantially of a drillable material so that the borehole can be extended beyond the point reached by the expandable reamer shoe.
605 Citations
67 Claims
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1. An expandable reamer shoe for mounting on a casing string, comprising:
a body upon which are arranged a plurality of reaming members, wherein; said reamer shoe is substantially constructed from a relatively soft drillable material, the plurality of reaming members are moveable between a first and second position, the reaming members are closed in a first position and expanded in a second position, the reaming members are operable in the second position to remove a portion of a wellbore, wherein the reaming members move from the first position to the second position by virtue of an activating piston, and each of the reaming members has a hardened material applied to an outer surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 27)
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23. A method of inserting expandable casing into a borehole, comprising the steps of:
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(a) running a first section of expandable casing into a pre-drilled borehole; (b) expanding the first section of expandable casing in place; (c) underreaming under the in-place first section of expanded casing using a standard underreamer and bit; (d) running a second section of expandable casing through the first section of expandable casing with an expandable reamer shoe; (e) reaming down the borehole by rotation and/or reciprocation of the expandable reamer shoe to an expected size; and (f) drilling through the expandable reamer shoe prior to running a subsequent section of expandable casing through an in-place section of expandable casing. - View Dependent Claims (24, 25, 26, 28)
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29. A reamer shoe for mounting on a casing string, comprising:
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one or more reaming members; disposed on the body, radially movable from a retracted position to an extended position, and actuatable to remove a portion of the wellbore; and a locking member made from a drillable material and which locks the one or more reaming members in the extended position. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 51)
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47. A method of inserting casing into a borehole, comprising:
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running a first casing into the borehole; running a second casing having an expandable reamer made from a drillable material into the borehole; expanding the expandable reamer; underreaming an uncased portion of the borehole using the expandable reamer; and coupling the second casing to the first casing. - View Dependent Claims (48, 49, 50, 52)
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53. An expandable reamer shoe for mounting on a casing string, comprising:
a body upon which are arranged a plurality of reaming members, wherein; said reamer shoe is substantially constructed from a relatively soft drillable material, the plurality of reaming members are moveable between a first position and a second position, the reaming members are closed in the first position and expanded in the second position, and in the second expanded position, the reaming members are locked in position by a first and a second retaining block at each respective end of each one of the reaming members.
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54. An expandable reamer shoe for mounting on a casing string, comprising:
a body upon which are arranged a plurality of reaming members, wherein; said reamer shoe is substantially constructed from a relatively soft drillable material, the plurality of reaming members are moveable between a first position and a second position, the reaming members are closed in the first position and expanded in the second position, the reaming members are operable in the second position to remove a portion of a wellbore, the reaming members move from the first closed position to the second expanded position by virtue of movement of an activating piston, and the activating piston has an external split ring mounted around an outside diameter. - View Dependent Claims (55)
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56. An expandable reamer shoe for mounting on a casing string, comprising:
a body upon which are arranged a plurality of reaming members, wherein; said reamer shoe is substantially constructed from a relatively soft drillable material, the plurality of reaming members are moveable between a first position and a second position, the reaming members are closed in the first position and expanded in the second position, the reaming members are operable in the second position to remove a portion of a wellbore, the reaming members move from the first closed position to the second expanded position by virtue of movement of an activating piston, the reaming members move from the first closed position to the second expanded position by virtue of a hydrodynamic pressure drop between an interior and exterior of the reamer shoe, and said hydrodynamic pressure drop is created by one or more nozzles attached to a lowermost end of the reamer shoe.
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57. An expandable reamer shoe for mounting on a casing string, comprising:
a body upon which are arranged a plurality of reaming members, wherein; said reamer shoe is substantially constructed from a relatively soft drillable material, the plurality of reaming members are moveable between a first and second position, the reaming members are closed in a first position and expanded in a second position, the reaming members are operable in the second position to remove a portion of a wellbore, the reaming members are biased towards the first position. - View Dependent Claims (58, 59, 60)
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61. A reamer shoe for mounting on a casing string, comprising:
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a body; one or more reaming members; disposed on the body, radially movable from a retracted position to an extended position, wherein the one or more reaming members are biased towards the retracted position, and actuatable to remove a portion of the wellbore; and an actuator; for moving the one or more reaming members between the retracted position and the extended position, and made from a drillable material. - View Dependent Claims (62)
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63. An expandable reamer shoe for mounting on a casing string, comprising:
a body upon which are arranged a plurality of reaming members, wherein; said reamer shoe is substantially constructed from a relatively soft drillable material, wherein the reamer shoe includes a rupture member which permits increased fluid flow from an interior of the reamer shoe to the exterior of the reamer shoe, the plurality of reaming members are moveable between a first and second position, the reaming members are closed in a first position and expanded in a second position, the reaming members are operable in the second position to remove a portion of a wellbore, and each of the reaming members has a hardened material applied to an outer surface. wherein the reamer shoe includes a rupture member which permits increased fluid flow from an interior of the reamer shoe to the exterior of the reamer shoe.
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64. A method of inserting a tubular into a wellbore, comprising the steps of:
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running a section of expandable tubular into the wellbore with an expandable reamer shoe; reaming down the borehole by rotation and/or reciprocation of the expanded expandable reamer shoe; and drilling through the expandable reamer shoe. - View Dependent Claims (65, 66, 67)
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Specification