Methods of perforating a well using coiled tubing

Details Methods of perforating a well using coiled tubing Methods of perforating a well using coiled tubing

1993-10-08

1995-03-21

Neuder, William P.

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

166385, 166 55, E21B 43116

Patent

active

053987608

ABSTRACT:
Methods of perforating a well using coiled tubing conveyed perforating guns are disclosed. A perforating tool string includes a coiled tubing string, a perforating gun, a releasable gun hanger, and a pressure responsive release connecting the coiled tubing string to the perforating gun. The perforating tool string is lowered into place within the well and then the gun hanger is actuated by reciprocating motion of the coiled tubing string without rotating the coiled tubing string, thereby setting the gun hanger in the casing. Fluid pressure is then increased in the coiled tubing string to actuate the pressure responsive release to release the coiled tubing string from the perforating gun. The coiled tubing string and pressure responsive connector may then be retrieved from the well prior to firing the perforating gun. The perforating gun is subsequently fired by a pressure responsive firing head to perforate the well casing, and the perforating gun then automatically drops to the bottom of the well casing.

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Vann Systems Catalog, pp. 16 and 17, entitled "Pressure Actuated Tubing Release" (not dated but admitted to be prior art).

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