초록 ▼

A through tubing gravel pack assembly which is capable of being run on a coiled tubing string inside existing tubing for repairing a preexisting gravel pack. The through tubing gravel pack system comprises a hydraulically releasable running tool and service assembly, a hydraulically set through tubi

A through tubing gravel pack assembly which is capable of being run on a coiled tubing string inside existing tubing for repairing a preexisting gravel pack. The through tubing gravel pack system comprises a hydraulically releasable running tool and service assembly, a hydraulically set through tubing packer assembly and a crossover sleeve and sliding sleeve valve assembly. The gravel pack assembly is adapted to be shiftable between a circulating mode and a squeeze mode for conducting a circulating gravel pack and/or a squeeze gravel pack without the necessity of having to trip the assembly out of the borehole.

대표청구항 ▼

[ What is claimed is:] [32.] A method of gravel packing a wellbore through a production tubing string comprising the steps of:(a) running a through tubing gravel pack assembly inside said production tubing to a desired depth, said gravel pack assembly comprising a packer, a crossover sleeve and slid

[ What is claimed is:] [32.] A method of gravel packing a wellbore through a production tubing string comprising the steps of:(a) running a through tubing gravel pack assembly inside said production tubing to a desired depth, said gravel pack assembly comprising a packer, a crossover sleeve and sliding sleeve valve assembly extending coaxially beneath said packer, a running tool and service assembly releasably connected to said packer, said running tool and service assembly adapted for reciprocating longitudinal movement within said packer and said crossover sleeve and sliding sleeve valve assembly, and a slotted gravel pack screen;(b) setting said packer;(c) releasing said running tool and service assembly from said packer;(d) reciprocating said running tool and service assembly relative to said packer and said crossover sleeve and sliding sleeve valve assembly in one longitudinal direction to a circulating position;(e) displacing a gravel pack slurry to said gravel pack assembly and through ports in said crossover sleeve and sliding sleeve valve assembly to said slotted screen;(f) circulating the carrier fluid of a portion of said slurry through said slotted screen and up through longitudinally extending passageways in said crossover sleeve;(g) reciprocating said running tool and service assembly relative to said packer and crossover sleeve and sliding sleeve valve assembly in another longitudinal direction to a squeeze position;(h) squeezing the carrier fluid from a subsequent portion of said slurry into a subterranean formation;(i) closing said sliding sleeve valve assembly; and(j) retrieving said running tool and service assembly tool from said gravel pack assembly.