CN201588611U

CN201588611U - Ball-injection compression initiation device for patch hole of gas well

Info

Publication number: CN201588611U
Application number: CN2009203124212U
Authority: CN
Inventors: 赵开良; 肖勇; 吕世杰; 张俊杰; 孙兴宇
Original assignee: China Petrochemical Corp; Geophysical Well Logging Co of Sinopec Zhongyuan Petroleum Exploration Bureau
Current assignee: China Petrochemical Corp; Geophysical Well Logging Co of Sinopec Zhongyuan Petroleum Exploration Bureau
Priority date: 2009-10-14
Filing date: 2009-10-14
Publication date: 2010-09-22
Anticipated expiration: 2019-10-14

Abstract

The utility model relates to a ball-injection compression initiation device for a patch hole of a gas well, which belongs to the technical field of oil-gas well perforation. The ball-injection compression initiation device consists of an upper body, a lower body, a slide sleeve, a firing pin assembly and a hot work assembly, wherein the upper body is in threaded connection with the lower body; the firing pin assembly is connected with the hot work assembly through an excitation sleeve, and is mounted in a center hole at the lower part of the lower body through threads; an upper circulating hole is formed on the outer pipe wall of the upper body; a lower circulating hole is formed on the outer pipe wall of the lower body; and the slide sleeve is fixed on the inner wall at the joint of the upper body and the lower body through a shear pin of the slide sleeve, so that the upper circulating hole on the upper body is in the close state. The device can initiate explosion in the bar throwing impact manner or the ball-injection compression manner and the oil pipe is communicated with an annular space in the positive direction and the negative direction before and after the initiation of a perforator so as to conduct normal circulation well in emergency. After perforation, the production can be achieved directly through the oil pipe. The ball-injection compression initiation device suits tubing conveyed perforation for wells with leaked sleeve, and particularly suits the patch hole of highly deviated gas wells.

Description

A kind of pitching pressurization priming device that is used for natural gas well perforations adding

Technical field

The utility model relates to a kind of pitching pressurization priming device that is used for natural gas well perforations adding, belongs to the perforating oil gas well technical field.

Background technology

For the natural gas well, generally take tubing conveyed perforation (tcp) technology to carry out perforation, if perforator is all emissions not, return combination producing perhaps, all need to carry out perforations adding, only dead chick hole technology also is tubing conveyed perforation (tcp), particularly high angle hole or horizontal well, must use tubing conveyed perforation (tcp) technology, detonation mode has only the well head pressurization to detonate.The condition that must possess the direct circulation kill-job in the work progress of natural gas well dead chick hole at any time is with the risk of defence blowout.Because the stratum penetrates out, be difficult to set up needed Initiation Pressure in the sleeve pipe, so all adopt the pressure drilling priming device at present, oil pipe and annular space are obstructed before detonating, after perforator put in place, from the oil pipe pressurization perforator that detonates, oil pipe and annular space were communicated with simultaneously.This priming device can satisfy the requirement of reliable initiation preferably, but well head pressure is unusual in the following perforation tubing string process of contingency, and kill-job can not circulate.If one cover reverse circulation valve is installed, can guarantee that liquid enters oil pipe automatically in the sleeve pipe, and oil pipe and annular space forward are obstructed, but the natural gas well does not allow the recycled back kill-job on initiator top.So just required a kind of initiator, can satisfy the requirement of direct circulation kill-job at any time in perforator is gone into the well process, can satisfy again and can set up high pressure at well head, make the safe and reliable requirement of detonating of initiator.

Summary of the invention

The purpose of this utility model utilizes tubing conveyed perforation (tcp) technology that the natural gas well is carried out the problem that perforations adding when construction perforator can not the direct circulation kill-job before detonating in order to solve, and design a kind of pitching that is used for natural gas well perforations adding in perforation work progress priming device that pressurizes that is.

The utility model is made up of upper body, following body, sliding sleeve, firing pin assembly, fire-working component, upper body is threaded with following body, the firing pin assembly is connected by exciting cover with fire-working component, and be installed in down by screw thread in the centre bore of body bottom, have the cocycle hole on the upper body outer tube wall, have down circulation port on the following body outer tube wall; Sliding sleeve is fixed on the inwall of upper body, following body joint portion by the sliding sleeve shear pin, makes the cocycle hole on the upper body be in closed state.

The utility model can adopt caber bump or pitching pressurization dual mode to detonate, oil pipe and positive and negative two directions of annular space all were communicated with before and after perforator detonated, can in case of emergency implement the direct circulation kill-job, can be behind the perforation directly by oil pipe production, be applicable to that the well that sleeve pipe is leaked carries out tubing conveyed perforation (tcp), the perforations adding of the especially big gradient natural gas well.

Description of drawings

Fig. 1 is the utility model structural representation.

Among the figure: 1 for upper body, 2 for the cocycle hole, 3 for the sliding sleeve shear pin, 4 for following body, 5 for circulation port down, 6 for steel ball, 7 for sealing ring, 8 for sliding sleeve, 9 for the firing pin assembly, 10 for the firing pin shear pin, 11 for fire-working component, 12 for exciting cover.

The specific embodiment

As shown in Figure 1, the utility model is made up of upper body 1, following body 4, sliding sleeve 8, firing pin assembly 9, fire-working component 11, upper body 1 is threaded with following body 4, firing pin assembly 9 is connected by exciting cover 12 with fire-working component 11, and be installed in down by screw thread in the centre bore of body 4 bottoms, firing pin shear pin 10 is arranged in the firing pin assembly 9, have cocycle hole 2 on upper body 1 outer tube wall, have down circulation port 5 on following body 4 outer tube walls; The interior centre bore of sliding sleeve 8 is the back taper body, and sliding sleeve 8 is fixed on the inwall of upper body 1, following body 4 joint portions by sliding sleeve shear pin 3, and sealing ring 7 is installed in the top, makes the cocycle hole 2 on the upper body 1 be in closed state.

Upper body 1 of the present utility model is connected with running string, and following body 4 is connected with perforator, carries with oil pipe and goes into the well.In the process of going into the well, if well head overflow or blowout take place suddenly, can set well head at once, by oil pipe direct circulation kill-job, liquid flows to the oil jacket annular space by the following circulation port 5 of body 4 under the oil pipe centre bore warp, if special circumstances, the following circulation port 5 under also can reaching by the oil jacket annular space on the body 4 is implemented anti-circulation kill-job.After perforator arrives the precalculated position, if straight well or little gradient well, directly caber bump firing pin assembly 9 detonates, if the hole deviation degree is big or horizontal well, can drop into steel ball 6 from well head, promote steel ball 6 with the liquid circulation and come downwards to sliding sleeve 8, sliding sleeve shear pin 3 is cut off in the well head pressurization, sliding sleeve 8 descending bump firing pin assemblies 9, and firing pin shear pin 10 is cut off, thereby excite fire-working component 11, finish the action of detonating.After sliding sleeve 8 was descending, cocycle hole 2 was opened, if direct circulation kill-job at this moment, liquid can flow to the oil jacket annular space from cocycle hole 2, satisfies kill-job or discharge opeing construction requirement.

Claims

1. pitching pressurization priming device that is used for natural gas well perforations adding, form by upper body (1), following body (4), sliding sleeve (8), firing pin assembly (9), fire-working component (11), upper body (1) is threaded with following body (4), firing pin assembly (9) is connected by exciting cover (12) with fire-working component (11), and be installed in down by screw thread in the centre bore of body (4) bottom, it is characterized in that: have cocycle hole (2) on upper body (1) outer tube wall, have down circulation port (5) on following body (4) outer tube wall; Sliding sleeve (8) is fixed on the inwall of upper body (1) and following body (4) joint portion by sliding sleeve shear pin (3), makes the cocycle hole (2) on the upper body (1) be in closed state.

2. a kind of pitching pressurization priming device that is used for natural gas well perforations adding according to claim 1, it is characterized in that: the interior centre bore of sliding sleeve (8) is the back taper body.

3. a kind of pitching pressurization priming device that is used for natural gas well perforations adding according to claim 1 and 2 is characterized in that: in sliding sleeve (8) upper end sealing ring (7) is installed.