Method and apparatus for coupling wireline tools to coil tubing
First Claim
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1. An apparatus for coupling a tool to a string of coil tubing in a bore hole, comprising:
- a tubular lower housing attached to said tool;
a tubular upper housing, having a first end coaxially received within said lower housing, and having a second end attached to said string of coil tubing; and
means, located within said upper and lower housings, for compressing said first end of said upper housing against said lower housing.
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Abstract
Apparatus for coupling wireline tools to coil tubing wherein a pull-out, disconnect, is provided. The pull-out consists of two tubular members with flared, bell-shaped portions, one such portion being coaxially disposed within the other. A ferrule applies pressure to the interface of the surfaces of said flared portions. Sufficient tension on the coil tubing pulls the flared portion of the interior member through the neck and out of the exterior member. Pilot valves prevent intrusion of bore hole fluid into the coupling device during logging and into the coil tubing if a pull-out has been effected.
38 Citations
16 Claims
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1. An apparatus for coupling a tool to a string of coil tubing in a bore hole, comprising:
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a tubular lower housing attached to said tool; a tubular upper housing, having a first end coaxially received within said lower housing, and having a second end attached to said string of coil tubing; and means, located within said upper and lower housings, for compressing said first end of said upper housing against said lower housing. - View Dependent Claims (2, 3)
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4. An apparatus for decoupling a tool from a string of coil tubing in a bore hole, comprising:
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a tubular lower housing attached to said tool; a tubular upper housing, having a first end received within said lower housing and retained therein by friction, said tubular upper housing also having a second end attached to said string of coil tubing; and means, located within said lower housing, for deforming said first end of said upper housing upon the decoupling of said tool from said string of coil tubing by applying tension to the string of coil tubing. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for coupling a tool to a string of coil tubing disposed within a bore hole, comprising the steps of:
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attaching an end of a lower housing to said tool; attaching an end of an upper housing to said string of coil tubing; and axially receiving an opposite end of said upper housing in an opposite end of said lower housing; and detachably coupling said upper housing within said lower housing by way of an adjustable pressure fitting, compressing the opposite end of said upper housing against the opposite end of said lower housing by a pressure applying means positioned within said lower housing.
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15. A method for decoupling a tool from a string of coil tubing disoposed within a bore hole, comprisinig the steps of:
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attaching a lower housing to said tool; attaching an upper housing to said string of coil tubing; and pressure coupling an end of said upper housing coaxially within said lower housing, decoupling the tool from the coil tubing by applying a tension force to the coil tubing thereby deforming the end of said upper housing and allowing the upper housing to be withdrawn from the lower housing. - View Dependent Claims (16)
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Specification