Tubing conveyed perforating gun electrical detonator
AssigneeHalliburton Company
InventorsLarry L. Grigar, Carl B. Miller
Life of this patent
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Abstract
For use with a tubing conveyed perforating gun assembly, a wireline manipulated electrically actuated detonator assembly traversing the interior of the tubing is described. In the preferred and illustrated embodiment, a wireline connected with a sinker bar supports the detonator assembly having a sinker bar sub terminating in a taper adjacent to a set of deflectable collet fingers comprising a latch assembly. The collet fingers are deflected outwardly by the tapered surface and are forced into an undercut located above a booster and detonating cord affixed to the tubing conveyed perforating gun assembly for firing the perforating guns.
Claims13
For use with a tubing conveyed perforating gun assembly which is positioned in a well at a specified depth and which includes shaped charges to be detonated, a detonator assembly run on a wireline in the tubing which comprises:
- (a) an elongated body adapted to be passed into the tubing string supporting the tubing conveyed perforating gun assembly;
- (b) positive lock means on said elongated body, said lock means being;
- (1) inoperative during lowering in the tubing string;
- (2) operative to a latching position relative to the tubing string on landing at a requisite depth in the tubing string;
- (3) said positive lock means being operated by relative weight exceeding a specified level acting thereon;
- (4) wherein said lock means holds said elongated body at a specified elevation indefinitely until released;
- (c) a detonator carried on said body for selective detonation to provide an operative detonation delivered to the perforated gun assembly on the tubing string;
- and
- (d) detonation signal transfer means for delivery of a detonation signal under control of the operator at the surface of the well.
A method of detonating shaped charges in a well comprising the steps of:
- (a) suspending a tubing conveyed perforating gun assembly in a well at a depth for perforation;
- (b) lowering a wireline into the tubing to position a detonator in a wireline supported detonator assembly;
- (c) landing the detonator on a registration surface in the tubing;
- (d) pulling up on the wireline to temporarily lock said detonator above the registration surface and below tubing supported cooperative shoulder means wherein said detonator holds against the upward pull to assure proper positioning relative to said registration surface;
- (e) transmitting a firing signal along the wireline to said detonator to initiate detonation at a location assured by registration on said registration surface;
- and
- (f) firing the shaped charges by detonation of said detonator.
Dependencies are inferred from the claim text.