Automatic drop-off device for perforating guns
This patent describes a perforating gun assembly adapted to be run into a tightly dimensioned well borehole for perforating into producing formations at a specified depth, the perforating gun assembly comprising: (a) an elongated body adapted to be lowered into a tightly dimensioned passageway along a well; (b) a carrier for supporting one or more shaped charges thereon, the carrier being supported below the elongate body; (c) connective means joining the body and carrier coaxially together for running into a well borehole for subsequent separation wherein the connective means connects to the body and carrier and includes: (1) a circular set of extending collet fingers having engaging surfaces thereon and adapted to flex, the fingers flexing radially inwardly and outwardly; (2) a surrounding sleeve about the collet fingers having a collet finger engaging surface cooperative with the finger engaging surfaces; (3) piston means abutting the collet fingers to lock the collet fingers against flexing wherein the collet fingers are prevented from flexing radially; (4) the connective means further including a closed chamber for applying fluid pressure against the piston means; (5) the collet fingers and the sleeve serially joining together the body and the carrier for supporting the carrier below the body to form the perforating gun assembly.
- Assignee:
- Halliburton Co., Duncan, OK
- Patent Number(s):
- US 4771827
- OSTI ID:
- 6804578
- Resource Relation:
- Patent File Date: Filed date 23 Apr 1987
- Country of Publication:
- United States
- Language:
- English
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