Downhole adjustable bent housing for directional drilling
First Claim
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1. A directable apparatus for downhole directional drilling comprising:
- a mandrel housing having a mandrel disposed within the mandrel housing, a biasing member for retracting the mandrel, and a collar coupling the mandrel with the mandrel housing to control pressure actuated extension of the mandrel between a first extended position and a second extended position; and
a directable housing pivotally coupled to the mandrel housing, the directable housing having an articulating member pivotally secured therein, wherein the articulating member has a passage therethrough with a first portion for receiving the mandrel in the first extended position to lock the directable housing at a first angle relative to the mandrel housing and a second portion for receiving the mandrel in the second extended position to lock the directable housing at a second angle relative to the mandrel housing.
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Abstract
The present invention provides a hydraulically actuated downhole adjustable bent housing for use in directional drilling of bore holes and wells that allows adjustment of the housing from aligned to a bent configuration without raising or lowering the drillstring. The present invention also provides a method of directionally drilling a bore hole or a well using an downhole adjustable bent housing that can be operated without raising or lowering the drillstring.
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Citations
17 Claims
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1. A directable apparatus for downhole directional drilling comprising:
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a mandrel housing having a mandrel disposed within the mandrel housing, a biasing member for retracting the mandrel, and a collar coupling the mandrel with the mandrel housing to control pressure actuated extension of the mandrel between a first extended position and a second extended position; and
a directable housing pivotally coupled to the mandrel housing, the directable housing having an articulating member pivotally secured therein, wherein the articulating member has a passage therethrough with a first portion for receiving the mandrel in the first extended position to lock the directable housing at a first angle relative to the mandrel housing and a second portion for receiving the mandrel in the second extended position to lock the directable housing at a second angle relative to the mandrel housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for use in directional drilling of wells comprising:
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an elongate housing having a proximal section, a distal section, and a pivot joint connecting the proximal and distal sections;
an actuation shaft extending between the proximal section and the distal section through the pivot joint, the actuation shaft being selectively extendable between a first position and a second position;
an articulating member pivotally secured inside the distal section to define a pivot axis, the articulating member comprising an intersecting bore having an axial centerline that is perpendicular to and offset from the pivot axis, and a landing port adapted for receiving the distal end of the actuation shaft;
wherein extending the actuation shaft into contact with the landing port secures the distal section in axial alignment with the proximal section; and
wherein extending the actuation shaft into axial alignment with the intersecting bore secures the distal section to the proximal section at an angle apart from axial alignment. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A downhole adjustable bent housing for use in drilling operations, comprising:
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a first housing section;
a second housing section;
a connector connecting said first housing section to said second housing section and permitting said second housing section to pivot relative to said first housing section;
a mandrel extending between said first housing section and said second housing section through said connector and moveable between a retracted position and an extended position;
an articulating member pivotally secured within said second housing section, said articulating member having a deviated passage therethrough for receiving said mandrel and being pivotal between a first, inactive position when the mandrel is in its retracted position and a second, deployed position when the mandrel is in its extended position, the deployed mandrel position inducing said second housing to pivot relative to said first housing.
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Specification