RU1768748C - Explosion packer - Google Patents

Abstract

The invention relates to the exploration field and can be used to isolate a wellbore in an exploratory well. The purpose of the invention is to simplify the design of an explosive packer using a high explosive explosive and increase the reliability of operation in a deep well. For this, the packer has a cable cutter. The latter is installed in a hollow plugged in the lower part of the housing 1 between its head 2 and the cable mount. The latter consists of a conical holder 11 and a liner 12c with an outer conical surface beneath the surface of the holder connected by a union nut 13. The body cavity is connected by a channel 3 to the space of the well. The cable cutter is made in the form of a fixed support 7 and a cylindrical sleeve 8 and a piston 9 with a shank sequentially installed under it. The housing, cutter and cable holder have a conduit for passing the cable. In the explosion of a high explosive charge 10 located under the piston, the shock wave acts on the housing, inflating it, and on the piston. The piston pushes up mounted on it a cylindrical truncated at an angle of 45 °; sleeve. Last cuts the cable 4. 1 ill. cl

Description

where n is the number of threads of the detonating cord DSHV;

dTp — outer diameter of the packer body, mm;

hp-packer body wall thickness, mm;

Edop - allowable relative deformation of steel;

TO

dS

diT

(6)

where d3 is the diameter of the torpedo charge in the open barrel, mm;

d3K is the diameter of the torpedo charge in the fixed interval, mm;

drpsH - inner diameter of the pipe, mm; dip is the outer diameter of the pipe, mm; dc - well diameter, mm. Dividing (5) by (4), we obtain

dc

(7)

0.23 +0.4

dc

where dip is the outer diameter of the packer;

dc is the inner diameter of the casing.

The introduction of an unpressurized high-explosive explosive packer with a cable cutter showed simplicity in the technology of manufacturing and using packers, their reliability and the ability to accurately select the depth when installing uncoupling bridges in wells, and also their cheapness compared to existing sealed explosive packers.

Claims (1)

The claims Explosive packer, including a hollow housing plugged at the bottom, a head with a socket connected to the housing, having a channel for cable passage, assembly cable fasteners in a housing consisting of a conical holder and a liner with an outer conical surface above the surface of the holder connected an overhead nut, and an explosive located in the housing, characterized in that, in order to simplify the design when using a high explosive explosive and increase the reliability of operation in a deep well, the packer is equipped with a cable cutter, which is installed in the housing between its head and the cable mount, and is made in the form of a fixed support located in the saddle of the head and installed in series under the fixed support of a cylindrical sleeve, truncated on both sides at an angle of 45 °, and the piston with the shank, the fixed support, the sleeve and the shank with the piston have a channel for cable passage, and the ends of the fixed support and the shank of the piston mating with the sleeve have conical cuts for the cuts of the sleeve, while the head Acker in place of the cable passage has a passage communicating the body cavity with the space behind it, and the explosive is placed under the piston.