CN201100108Y

CN201100108Y - Gas dynamics repair and congestion device for oil gas well bushing

Info

Publication number: CN201100108Y
Application number: CNU200720126332XU
Authority: CN
Inventors: 郑油路; 魏嵬; 高彦增
Original assignee: XI'AN JIYI PETROLEUM TECHNOLOGY Co Ltd
Current assignee: XI'AN JIYI PETROLEUM TECHNOLOGY Co Ltd
Priority date: 2007-11-09
Filing date: 2007-11-09
Publication date: 2008-08-13
Anticipated expiration: 2017-11-09

Abstract

The utility model relates to an oil and gas well casing pipe gas power repairing and blocking device, a corrected depth short section is arranged on the lower end of a lowest segment oil conduit, a connecting pipe is arranged on the lower end of a sieve tube, a blaster is arranged on the lower end of the sieve tube in the connecting pipe, a solid propellant column is arranged on the lower end of the blaster, a piston cylinder which is radially manufactured with a piston cylinder depressurization hole a is arranged on the lower end of the connecting pipe, a piston rod which is provided with a guide piston is arranged in the piston cylinder, and an anchoring mechanism is arranged on the lower end of the piston cylinder, a repairing tube is arranged on the lower end of the anchoring mechanism, and a relieving gear is arranged on the lower end of the repairing tube. The high-energy high-pressure gas which is released through burning solid propellant materials is adopted as driving force to push the piston rod to move comparatively in the piston cylinder, the high-energy high-pressure gas enables the repairing tube to expand and cling on a damaging position of a casing pipe, the repairing tube and the casing pipe are closely combined, and two ends of the casing pipe is fixedly anchored. The oil and gas well casing pipe gas power repairing and blocking device has the advantages of simple technique, high success rate, low constructing cost and the like and can be used in oil and gas wells for repairing water well casing pipes.

Description

Oil gas casing gas power is repaiied block apparatus

Technical field

The utility model belongs to method or the equipment technical field that producing oil, gas, water, solubilized maybe can be dissolved material from deep-well, is specifically related to the prosthetic device of oil gas casing.

Background technology

Latter period of oilfield development because geologic(al) factor, corrosion factor and engineering construction factor, cause big gauging, gas, well casing deformation, frustrate disconnected, undergauge, have influence on the normal construction production in oil field, reduce oil, gas output, shorten the application life of producing well.

Present domestic oil field casing spoilage reaches more than 30%, and the old filed sleeve pipe damages year by year, and climbing is about 10%, the well workover quality has determined the final production capacity of oil gas well, and what domestic down-hole well workover technology commonly used used is that the N80 bushing pipe is managed as subsidy, can not expand, combine not tight between subsidy pipe and the sleeve pipe, leave the slit, after the repairing, damage once more easily, success rate is low, can not solve sleeve pipe rationally and effectively and damage problem.

The subsidy method of oil gas casing has three kinds, a kind of method is to adopt the explosive welding (EW) connection, explosive is contained in subsidy to be placed on heat and the gases at high pressure that the subsidy section ignition charge of down-hole casing produced in the pipe and will to subsidize the inwall that pipe is bonded in the casing patching section, adopt this method subsidy sleeve pipe poor effect, because detonation velocity is very fast, water between subsidy pipe and the sleeve pipe has little time to get rid of, explosive reaction finishes, because water cannot compress, cause between subsidy pipe and the sleeve pipe still to have the gap after blast finishes, the subsidy pipe is not gone up with sleeve pipe is bonding.Secondly because the damaged condition of down-hole casing is different, the bad grasp of the explosive payload of explosive.

The another kind of method of oil gas casing subsidy is a bellows hole enlargement allowance law, used equipment is hydraulic cylinder, the piston rod of hydraulic cylinder with put into the cone that the bellows inner conical surface makes progress and link, this device is lowered into subsidy section in the sleeve pipe, the operator operates hydraulic selector, the piston rod of hydraulic cylinder is moved up, and cone makes the bellows hole enlargement, bellows is subsidized the subsidy section of sleeve pipe.In a single day round situation appears in the horizontal section of casing patching section inwall, and after the subsidy, bellows outer wall and internal surface of sleeve pipe can not fit tightly, and the gap still occurs.

The patent No. is 97242004.5, denomination of invention is the Chinese utility model patent of " oil gas casing hydraulic expanding-forming subsidy device ", adopt the hydraulic pressure subsidy main body that links with the ground hydraulic pump, under the effect of highly pressurised liquid, hydraulic pressure subsidy main body radially bulging is subsidized on the sleeve pipe of oil well.This casing patching device, because conduit under fluid pressure is long, pressure reduces gradually, and hydraulic pressure subsidy agent structure complexity, very difficult realization hydraulic pressure subsidy main body radially outward bulging will be subsidized the internal surface of sleeve pipe of pipe subsidy at oil well.

Summary of the invention

Technical problem to be solved in the utility model is to overcome the shortcoming of above-mentioned casing patching device, provides a kind of oil gas casing gas power reasonable in design, simple in structure, that subsidy effect is good to repair block apparatus.

The technical scheme that solves the problems of the technologies described above employing is: be provided with the dark pipe nipple in school in the lower end of next Oil-saving pipe, the lower end of the dark pipe nipple in school is provided with screen casing, the lower end of screen casing is provided with connecting tube, the screen casing lower end is provided with initiator in the connecting tube, the lower end of initiator is provided with the solid propellant post, the lower end of connecting tube is provided with the piston rod that radially is processed with piston rod pressure relief vent a, the piston rod that guide piston is installed is set in piston rod, the lower end of piston rod is provided with anchor mechanism, the lower end of anchor mechanism is provided with the subsidy pipe, and the lower end of subsidy pipe is provided with arming mechanism.

Anchor mechanism of the present utility model is: the lower end of going up anchor block envelope tube is provided with down anchor block envelope tube.

Release mechanism of the present utility model is: in shear sleeve is axial shear pin is set, is outside equipped with and shears pipe, the lower end of shear pin and shear sleeve is provided with frees seat of honour envelope tube, the lower end of freeing seat of honour envelope tube is provided with and discharges cover, and the release cover is arranged with to separate takes off seat envelope tube.

The center of piston rod of the present utility model is processed with centre bore c, is processed with the side down hole b that the centre bore c with piston rod links under the guide piston of piston rod.

The high energy gases at high pressure that the utility model adopts the solid propellant fuel combustion to discharge are motive force, promoting piston rod does relative motion at piston rod, the high energy gases at high pressure expand the subsidy pipe rapidly, subsidy is at the sleeve pipe damaged location, the subsidy pipe is tight with thimble joint, and the bushing pipe two ends are by firmly grappling.The utility model is compared with explosive welding, bellows subsidy, hydraulic pressure subsidy, do not need ground high pressure water conservancy equipment, operating tool string be need not sealing, with metal anchors and metallic packing ring grappling, it is big to subsidize firm intensity, and after the construction, the down-hole does not have junk, pollution-free, success rate reaches more than 90%, can accurately, rapidly, inerrably will subsidize pipe and stick on the position that sleeve pipe need be subsidized.The utlity model has advantages such as technology is simple, success rate is high, operating expenses is low, can be used for oil, gas well, the subsidy of well sleeve pipe.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the utility model.

Fig. 2 is the structural representation of anchor mechanism 9 among Fig. 1.

Fig. 3 is the structural representation of release mechanism 11 among Fig. 1

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiment.

Embodiment 1

In Fig. 1, the oil gas casing gas power of present embodiment is repaiied block apparatus and is made of oil pipe 1, the dark pipe nipple 2 in school, screen casing 3, initiator 4, solid propellant post 5, connecting tube 6, piston rod 7, the sieve cylinder 8 of living, anchor mechanism 9, subsidy pipe 10, release mechanism 11, guide piston 12 connections.

In the sleeve pipe 13 of oil well, the lower end of a bottom Oil-saving pipe 1 connects by the upper end of the dark pipe nipple 2 in screw thread and school, the lower end of the dark pipe nipple 2 in school connects by the upper end of screw thread with screen casing 3, be processed with pressure relief vent on the screen casing 3, the pressure relief vent of differing heights and an adjacent row's pressure relief vent is staggered on the screen casing 3, and there is connecting tube 6 lower end of screen casing 3 by thread connection.Screen casing 3 lower ends are equipped with initiator 4 by thread connection in the connecting tube 6, and the lower end of initiator 4 is equipped with solid propellant post 5, and solid propellant post 5 is a propellant of high energy.The lower end of connecting tube 6 is equipped with piston rod 8 by thread connection, is processed with piston rod pressure relief vent a on the upper end sidewall of piston rod 8, and the solid propellant post is equipped with piston rod 75 times in the piston rod 8.The piston rod 7 of present embodiment is the hollow piston bar, the center of piston rod 7 is processed with centre bore c, constitute by thread connection with coupling sleeve by more piece piston stalk, on the piston rod 7 with piston rod 7 guide piston 12 that has been connected as a single entity, be processed with side down hole b on guide piston 12 lower piston rods 7, the high energy gases at high pressure enter, affact on the guide piston 12 through the side down hole b of piston rod 7 from the centre bore c of piston rod 7, promote guide piston 12 and piston rod 7 and move in piston rod 8.The lower end of piston rod 8 is equipped with anchor mechanism 9, and the lower end of anchor mechanism 9 is equipped with subsidy pipe 10, and subsidy pipe 10 is used to subsidize the position of damaging at sleeve pipe 13.The lower end of subsidy pipe 10 is equipped with release mechanism 11, and before the subsidy, release mechanism 11 is thrown off.

In Fig. 2, the anchor mechanism 9 of present embodiment is made of last anchor block envelope tube 9-1, a following anchor block envelope tube 9-9.Dock with the upper end of following anchor block envelope tube 9-2 the lower end of last anchor block envelope tube 9-1.Piston rod 7 passes from the centre bore of anchor block envelope tube 9-1 and following anchor block envelope tube 9-2.When last anchor block envelope tube 9-1 and following anchor block envelope tube 9-2 arrive the anchor station, the high energy gas that is produced after solid propellant post 5 is ignited moves upward the piston rod 7 in the anchor mechanism 9, when piston rod 7 moves upward to the anchor station, combustion gas is flowed out from piston rod pressure relief vent a and is discharged release, last anchor block envelope tube 9-1 and following anchor block seal tube 9-2 butt joint, are anchored on the upper end of sleeve pipe 13 inwalls subsidy pipe 10 then.

In Fig. 3, the release mechanism 11 of present embodiment is by shearing pipe 11-1, shear pin 11-2, shear sleeve 11-3, free a seat of honour envelope tube 11-4, discharge cover 11-5, separating and take off a seat envelope tube 11-6 and connect and constitute.Shear pin 11-2 is sleeved on the outside of piston rod 7, the outer cover of shear pin 11-2 is equipped with shear sleeve 11-3, the outer cover of shear sleeve 11-3 is equipped with shears pipe 11-1, the lower end piston rod 7 outer suits of shear pin 11-2 and shear sleeve 11-3 are freed seat of honour envelope tube 11-4, lower end piston rod 7 outer being set with of freeing seat of honour envelope tube 11-4 discharge cover 11-5, discharge cover 11-5 lower end piston rod 7 outer being set with and free following envelope tube 11-6.When solid propellant post 5 was not ignited, shear pin 11-2 was fixed on piston rod 7 in the shear sleeve 11-3, and piston rod 7 can not move up and down.After solid propellant post 5 is ignited, the high energy gas that is produced cuts off shear pin 11-2, take off the release cover 11-5 release that seat envelope tube 11-6 connects with separating, under the high energy gas promotion, piston rod 7 moves upward in release mechanism 11, when piston rod 7 moves upward to the length of subsidy pipe 10, subsidy pipe 10 expands, and is close to sleeve pipe 13 inwalls, and gaseous-pressure is released, free seat of honour envelope tube 11-4 and take off seat envelope tube 11-6 seat envelope and dock with separating, be anchored on sleeve pipe 13 inwalls then and subsidize and manage 10 lower end.

Operating principle of the present utility model is as follows:

The operator is installed in the damaged location that the lower end of next Oil-saving pipe 1 is lowered to oil well casing 13 with the utility model, connect the power supply of initiator 4, initiator 4 is lighted solid propellant post 5 and is detonated, the high energy gas that is produced after 5 detonations of solid propellant post promotes piston rod 7 and does relative motion with piston rod 8, release mechanism 11 is thrown off, subsidy pipe 10 is expanded rapidly, subsidy is at the damaged location of sleeve pipe 13 inwalls, the upper end that anchor mechanism 9 will be subsidized pipe 10 is anchored on sleeve pipe 13 inwalls, the lower end that disengagement release mechanism 11 will be subsidized pipe 10 is anchored on sleeve pipe 13 inwalls, after finishing sleeve pipe 10 subsidies, in oil well, take out other parts.

Claims

1, a kind of oil gas casing gas power is repaiied block apparatus, it is characterized in that: be provided with the dark pipe nipple in school (2) in the lower end of next Oil-saving pipe (1), the lower end of the dark pipe nipple in school (2) is provided with screen casing (3), the lower end of screen casing (3) is provided with connecting tube (6), the interior screen casing of connecting tube (6) (3) lower end is provided with initiator (4), the lower end of initiator (4) is provided with solid propellant post (5), the lower end of connecting tube (6) is provided with the piston rod (8) that radially is processed with piston rod pressure relief vent (a), the piston rod (7) that guide piston (12) are installed is set in piston rod (8), the lower end of piston rod (8) is provided with anchor mechanism (9), the lower end of anchor mechanism (9) is provided with subsidy pipe (10), and the lower end of subsidy pipe (10) is provided with arming mechanism (11).

2, repair block apparatus according to the described oil gas casing of claim 1 gas power, it is characterized in that said anchor mechanism (9) is: the lower end of going up anchor block envelope tube (9-1) is provided with down anchor block envelope tube (9-2).

3, repair block apparatus according to the described oil gas casing of claim 1 gas power, it is characterized in that said release mechanism (11) is: in shear sleeve (11-3) is axial shear pin (11-2) is set, is outside equipped with and shears pipe (11-1), the lower end of shear pin (11-2) and shear sleeve (11-3) is provided with frees seat of honour envelope tube (11-4), the lower end of freeing seat of honour envelope tube (11-4) is provided with and discharges cover (11-5), and release cover (11-5) is arranged with to separate takes off seat envelope tube (11-6).

4, repair block apparatus according to the described oil gas casing of claim 1 gas power, the center that it is characterized in that said piston rod (7) is processed with centre bore (c), is processed with the side down hole (b) that the centre bore (c) with piston rod (7) links under the guide piston of piston rod (7).