CN205778584U

CN205778584U - A kind of NEW TYPE OF COMPOSITE Breakdown acidizing pipe nipple

Info

Publication number: CN205778584U
Application number: CN201620496945.1U
Authority: CN
Inventors: 贾红战; 曹骕骕; 张耕培; 邱晓宁; 张苏; 周俊然
Original assignee: CNPC Bohai Drilling Engineering Co Ltd
Current assignee: CNPC Bohai Drilling Engineering Co Ltd
Priority date: 2016-05-26
Filing date: 2016-05-26
Publication date: 2016-12-07
Anticipated expiration: 2026-05-26

Abstract

This utility model provides a kind of NEW TYPE OF COMPOSITE Breakdown acidizing pipe nipple, including pipe nipple main body, overhead gage and lower baffle plate, pipe nipple main body is hollow cylinder, overhead gage is arranged on the top of pipe nipple body interior space, lower baffle plate is arranged on the bottom of pipe nipple body interior space, closed chamber is formed between overhead gage and lower baffle plate, pipe nipple main body wall offers water conservancy diversion through hole, water conservancy diversion through hole is arranged on the top of overhead gage place horizontal plane, pipe nipple main body wall is additionally provided with the first valve, and overhead gage offers some second valves.Acid solution isolation is left in closed chamber by composite blockage relieving described in the utility model acidifying pipe nipple, uses and has stratum specific aim；It can be avoided that being excessively used of acid solution, reduce cost；Can effective use acid solution, be prevented effectively from environmental pollution；Acid solution in annular seal space and other liquid isolation in well, it is to avoid lowering of concentration affects acidizing effect.

Description

A kind of NEW TYPE OF COMPOSITE Breakdown acidizing pipe nipple

Technical field

This utility model belongs to field of oil drilling, especially relates to a kind of NEW TYPE OF COMPOSITE Breakdown acidizing pipe nipple.

Background technology

During natural petroleum gas field, in order to obtain more oil and gas production, it will usually employing perforation, The PROCESS FOR TREATMENT bottom such as pressure break, acidifying, opens expansion payzone gap.Along with the development of payzone recovery percent, Payzone gap often blocks reduction oil and gas production, it is therefore desirable to carry out de-plugging operation.General de-plugging is made Industry is divided into two classes, physics de-plugging and chemical plugging removal, is used alone the plugging removal effect that one is difficult to reach satisfied, Occur that physical-chemical composite deblocking process first carries out hydraulic blow process at present, made oil reservoir nearly well ground Band simultaneously forms many radial microscopic checks, clamp-ons oil reservoir followed by by de-plugging agents such as acid solutions, thus Reach can thoroughly release oil layer blocking, the percolation ability of oil reservoir near wellbore zone can be increased substantially again, from And obtain significant increasing yield and injection effect.Acidification technique therein does not carries out isolation processing, acid solution to acid solution Often there is lowering of concentration, infection tubing string, lack the specific aim that stratum uses, and cause acid solution Excess causes residual, well-flushing to return row's after stain environment for reaction completely.

Summary of the invention

In view of this, this utility model is directed to a kind of NEW TYPE OF COMPOSITE Breakdown acidizing pipe nipple, solves at present The acid solution safety in utilization feature of environmental protection occurred in Oil/gas Well composite blockage relieving is poor, consumption big, lowering of concentration impact The problems such as acidizing effect, it is achieved reduce operational risk and cost, reach to improve the purpose of plugging removal effect.

For reaching above-mentioned purpose, the technical solution of the utility model is achieved in that

A kind of NEW TYPE OF COMPOSITE Breakdown acidizing pipe nipple, including pipe nipple main body, overhead gage and lower baffle plate, described short Joint main body is hollow cylinder, and described overhead gage is arranged on the top of pipe nipple body interior space, described lower block Plate is arranged on the bottom of pipe nipple body interior space, forms closed chamber between described overhead gage and lower baffle plate, Described pipe nipple main body wall offers water conservancy diversion through hole, and described water conservancy diversion through hole is arranged on overhead gage place horizontal plane Top, described pipe nipple main body wall is additionally provided with for the first valve of airtight cavity liquid injecting, described Overhead gage offers the liquid above some control overhead gages and flows to the second valve of closed chamber.

Further, described first valve and the second valve are check valve.

Further, between described overhead gage and pipe nipple main body, be provided with sealing ring, described lower baffle plate with It is provided with lower seal between pipe nipple main body.

Further, described second valve number is six, and six valves are that herringbone is distributed in overhead gage Surface.

Between overhead gage and lower baffle plate, form closed chamber, the first valve inject acid solution to closed chamber.When beating Being depressed into lower baffle plate to rupture, overhead gage upper liquid flows into bottom through the second valve, and promotes acid solution by pipe nipple Lower body part flow out, and flow into blocking payzone be acidified.

Relative to prior art, NEW TYPE OF COMPOSITE Breakdown acidizing pipe nipple described in the utility model has following excellent Gesture:

(1) acid solution isolation is left in closed chamber by this composite blockage relieving acidifying pipe nipple, uses and has stratum Specific aim；

(2) this composite blockage relieving acidifying pipe nipple is it can be avoided that being excessively used of acid solution, reduces cost；

(3) this composite blockage relieving acidifying pipe nipple can effective use acid solution, be prevented effectively from environmental pollution；

(4) acid solution in the annular seal space of this composite blockage relieving acidifying pipe nipple and other liquid isolation in well, keep away Exempt from lowering of concentration and affect acidizing effect.

Accompanying drawing explanation

The accompanying drawing constituting a part of the present utility model is further appreciated by of the present utility model for providing, Schematic description and description of the present utility model is used for explaining this utility model, is not intended that this reality With novel improper restriction.In the accompanying drawings:

Fig. 1 is the NEW TYPE OF COMPOSITE Breakdown acidizing pipe nipple structural representation described in this utility model embodiment；

Fig. 2 is overhead gage the second valve distribution schematic diagram described in this utility model embodiment.

Description of reference numerals:

1-pipe nipple main body；2-water conservancy diversion through hole；3-overhead gage；The upper sealing ring of 4-；5-the second valve；6- One valve；7-lower baffle plate；8-lower seal.

Detailed description of the invention

It should be noted that in the case of not conflicting, in embodiment in this utility model and embodiment Feature can be mutually combined.

In description of the present utility model, it is to be understood that term " " center ", " longitudinally ", " horizontal stroke To ", " on ", D score, "front", "rear", "left", "right", " vertically ", " water Flat ", the orientation that indicates of " top ", " end ", " interior ", " outward " etc. or position relationship be based on attached Orientation shown in figure or position relationship, be for only for ease of description this utility model and simplify description, and not Be instruction or the hint device of indication or element must have specific orientation, with specific azimuth configuration and Operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " first ", " second " Etc. being only used for describing purpose, and it is not intended that instruction or hint relative importance or implicit indicate indication The quantity of the technical characteristic shown.Thus, the feature defining " first ", " second " etc. can be expressed Or implicitly include one or more this feature.In description of the present utility model, unless otherwise Illustrating, " multiple " are meant that two or more.

In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, Term " is installed ", " being connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing, Can also be to removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection； Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be the company of two element internals Logical.For the ordinary skill in the art, can understand that above-mentioned term is at this by concrete condition Concrete meaning in utility model.

Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.

This composite blockage relieving acidifying pipe nipple specifically includes that pipe nipple main body 1, water conservancy diversion through hole 2, overhead gage 3, on Sealing ring 4, the second valve 5, the first valve 6, lower baffle plate 7, lower seal 8.

Seeing Fig. 1, four water conservancy diversion through hole 2 uniform ring, around being distributed in the upper portion side wall of pipe nipple main body 1, are led Opening 2 connects pipe nipple main body 1 interior or exterior space, for pipe nipple main body 1 internal injection liquid.Upper gear Plate 3 is positioned at the top of pipe nipple main body 1 inner space, and below water conservancy diversion through hole 2；Overhead gage 3 is with short It is provided with sealing ring 4 between joint main body 1；Overhead gage 3 surface configuration has six the second valves 5, six Valve is that herringbone is evenly distributed on overhead gage 3, and concrete distribution sees Fig. 2.In pipe nipple main body 1 Middle part sidewall is additionally provided with the first valve 6.Lower baffle plate 7 is positioned at pipe nipple main body 1 lower inside, lower baffle plate 7 And press from both sides lower seal 8 between pipe nipple main body 1.Closed chamber is defined between overhead gage 3 and lower baffle plate 7, the One valve 6 and the second valve 5 are check valve.First valve 6 is used for injecting acid solution in closed chamber, Second valve 5 is for being injected into the liquid above overhead gage 3 in closed chamber.

This pipe nipple bottom connects hydraulic blow pipe nipple, and this pipe nipple top connects tubing string to ground.This practicality is new Type, before lower going-into-well cylinder, is noted in the closed chamber formed between overhead gage 3 and lower baffle plate 7 by the first valve 6 Enter acid solution, discharge the gas in closed chamber simultaneously.After completing acid solution injection, by hydraulic blow pipe nipple and basis Pipe nipple enters down to blocking payzone, before starting hydraulic blow pipe nipple, suppresses and pressure break lower baffle plate 7. After geostatic pressure display lower baffle plate 7 ruptures, continue to suppress to starting hydraulic blow pipe nipple.Now, waterpower Above impact pipe nipple, (i.e. below lower baffle plate 7) occurs that pressure reduces district, causes the space under overhead gage 3 Pressure reduces, and the liquid on overhead gage 3 is flowed into below overhead gage 3 by the second valve 5, and forces acid Liquid stream enters hydraulic blow pipe nipple, enters back into blocking payzone and completes acidizing treatment.

The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, All within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, Within should be included in protection domain of the present utility model.

Claims

1. a NEW TYPE OF COMPOSITE Breakdown acidizing pipe nipple, it is characterised in that: this pipe nipple include pipe nipple main body, Overhead gage and lower baffle plate, described pipe nipple main body is hollow cylinder, and described overhead gage is arranged in pipe nipple main body The top in space, portion, described lower baffle plate is arranged on the bottom of pipe nipple body interior space, described overhead gage with Forming closed chamber between lower baffle plate, described pipe nipple main body wall offers water conservancy diversion through hole, described water conservancy diversion through hole Being arranged on the top of overhead gage place horizontal plane, described pipe nipple main body wall is additionally provided with for closed chamber First valve of interior fluid injection, the liquid that described overhead gage offers above some control overhead gages flows to airtight Second valve in chamber.

NEW TYPE OF COMPOSITE Breakdown acidizing pipe nipple the most according to claim 1, it is characterised in that: described First valve and the second valve are check valve.

NEW TYPE OF COMPOSITE Breakdown acidizing pipe nipple the most according to claim 1 and 2, it is characterised in that: It is provided with sealing ring between described overhead gage and pipe nipple main body, sets between described lower baffle plate and pipe nipple main body It is equipped with lower seal.

NEW TYPE OF COMPOSITE Breakdown acidizing pipe nipple the most according to claim 3, it is characterised in that: described Second valve number is six, and six valves are that herringbone is distributed in overhead gage surface.