Perforation method and apparatus
OwnerC. Pinto, Stephen Thompson +1inventors
InventorsC. Pinto, Stephen Thompson, David Johnson
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Abstract
A signature element is attached to a downhole cable or other protected equipment and the signal from a signature position detector is used, at least in part, to control the orientation of a directed perforating device or other directional device. Signal emitting sources can include a radioactive material added to an encapsulating composition of a downhole cable.
Claims36
1-19. (canceled)
An apparatus for orienting a perforating device away from a cable in a well, the apparatus comprising:
- (a) a radioactive signature element located at a known position relative to the cable;
- (b) a radiation detector for detecting the orientation of the signature element with respect to the perforating device;
- and
- (c) means for reorienting the perforating device away from the cable.
An apparatus for orienting a perforating device away from a cable in a well, the apparatus comprising:
- (a) an irradiated wire producing gamma rays, the wire being located at a known position relative to the cable;
- (b) a gamma ray detector for detecting the orientation of the irradiated wire with respect to the perforating device;
- and
- (c) means for reorienting the perforating device away from the cable.
A method of orienting a perforating device away from a cable in a well, the method comprising the steps of:
- positioning a radioactive signature element in a known position relative to the cable;
- detecting the signature element with a radiation detector;
- and
- orienting the perforating device away from the cable in response to the detecting step.
Dependencies are inferred from the claim text.