CN209654011U - Small casing pipe well sand control bottom sand washing service aid - Google Patents
Small casing pipe well sand control bottom sand washing service aid Download PDFInfo
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- CN209654011U CN209654011U CN201920339478.5U CN201920339478U CN209654011U CN 209654011 U CN209654011 U CN 209654011U CN 201920339478 U CN201920339478 U CN 201920339478U CN 209654011 U CN209654011 U CN 209654011U
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- ball seat
- guide sleeve
- flow guide
- baffle
- box cupling
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Abstract
The utility model relates to a kind of small casing pipe well sand control bottom sand washing service aids, the upper port of tubing string guide shoe is screwed with ball seat, ball seat upper port is equipped with ball seat box thread, the lower end of ball seat is equipped with male thread, ball seat centre bore upper end is equipped with ball seat aditus laryngis, it is equipped with up-small and down-big horn mouth below ball seat aditus laryngis and has set steel ball, the lower edge of steel ball is resisted against the center of baffle, multiple baffle permeable holes are evenly distributed on the center of baffle and circumference, the lower end of baffle is supported by spring, spring pocket is on righting flow guide sleeve, the upper port of righting flow guide sleeve and bottom interval a distance of baffle, the lower end of righting flow guide sleeve is supported on the interior step of tubing string guide shoe, the centre bore of righting flow guide sleeve connects with tubing string guide shoe centre bore.It is screwed with double male joint above ball seat, box cupling is screwed with above double male joint, box cupling central upper portion is equipped with bell and spigot, and periphery is equipped with box thread.The tool not only can satisfy the sand washing requirement of high pressure water flow, but also can enter screen casing inner cavity to avoid gravel.
Description
Technical field
The utility model relates to a kind of sand control back-up sand system more particularly to a kind of bottom sand washing services of small casing pipe well sand control
Tool belongs to production facilities technical field.
Background technique
Influenced by composite factors such as reservoir characteristics, production, operations, some oil wells there are problems that it is different degrees of shake out, it is main
It is distributed in typical loose sand oil accumulation, compared with other blocks, the period of shaking out is shorter, shakes out more serious, difficulty of governance is bigger.
Serious oil well shake out based on mechanical composite sand prevention, for the sand control of common large cased well, is set in oil pipe lower part
Sand control filament-coiling screen pipe, screen casing top are connected with packing tool by safety joint, and gravel is downward from oil pipe with water flow, through over packing
The first passage of tool enters the annular space below packing tool, makes the annular space between screen casing and casing full of gravel, it is established that people
The work sand block borehole wall prevents oil reservoir fine sand from flowing out；Water flow enters screen casing, enters on packing tool by the second channel of packing tool
The annular space of side, backflows outward from sleeve gate.
For the small casing pipe well after damaged repair, since the outer diameter of general packing tool is too big, especially packing tool periphery
Inverted Sand-proof leather cup envelope is difficult to enter small casing, therefore cannot use filling tubing string identical with big casing, can not carry out
Direct circulation filling process.Ground must be filled out, wellbore fillup, set and implement step by step, it is therefore desirable to it is dedicated anti-to design small casing pipe well
The periphery of sandfilling releasing tool, sand control pack releasing tool is connected with the upper end of sand control screen, sand control pack releasing tool
Washing pipe lower end has to pass through screen casing and the grafting of bottom irrigation service aid, and high pressure water flow is gone out from the lower port of washing pipe makes sand outstanding
It is floating, tubing string is washed down, tubing string decentralization stops sand washing behind predetermined position, the periphery of sand control screen is fallen under sand nature, thus
Set up the sand block borehole wall.Once but washing pipe stop sand washing, gravel will from enter screen casing lower port, cause construction fail,
Therefore bottom irrigation service aid must be installed in screen casing bottom, can have not only guaranteed the normal sand washing of washing pipe, but also sand can be prevented
Grain enters screen casing inner cavity.
Utility model content
The purpose of this utility model is that overcoming problems of the prior art, a kind of small casing pipe well sand control use is provided
Bottom sand washing service aid, is mounted on screen casing lower end, not only can satisfy the sand washing requirement of high pressure water flow, but can to avoid gravel into
Enter screen casing inner cavity.
In order to solve the above technical problems, a kind of small casing pipe well sand control bottom sand washing service aid of the utility model, packet
Tubing string guide shoe is included, the upper port of the tubing string guide shoe is screwed with ball seat, and the upper port of the ball seat is equipped with ball seat box thread, described
The lower end of ball seat is equipped with ball seat male thread, and the centre bore upper end of the ball seat is equipped with ball seat aditus laryngis, sets below the ball seat aditus laryngis
There is up-small and down-big horn mouth and set steel ball, the lower edge of the steel ball is resisted against the center of baffle, the center of the baffle
And multiple baffle permeable holes are evenly distributed on circumference, the lower end of the baffle is supported by spring, and the spring pocket is mounted in righting
On flow guide sleeve, the upper port of the righting flow guide sleeve and bottom interval a distance of the baffle, the righting flow guide sleeve
Lower end is supported on the interior step of the tubing string guide shoe, and centre bore and the tubing string guide shoe centre bore of the righting flow guide sleeve mutually pass through
It is logical.
Compared with the existing technology, the utility model achieves following the utility model has the advantages that the high pressure water flow come from above pushes steel
Ball and baffle overcome tension force of spring downlink, and water flows through ball seat aditus laryngis, baffle permeable hole enters the centre bore of righting flow guide sleeve, then
It is flowed out through tubing string guide shoe centre bore and carries out sand washing, sand is allowed to suspend, wash down tubing string, tubing string stops punching after transferring predetermined position
Sand, spring push baffle uplink at once, and steel ball is set on ball seat aditus laryngis, cut off water stream channel, gravel is avoided to enter in screen casing
Chamber；The periphery of sand control screen is fallen under sand nature, to set up the sand block borehole wall, then sand control pack releasing tool is given up,
Bottom irrigation service aid and sand control screen stay well jointly.
As the improvement of the utility model, the ball seat series connection is screwed with two-stage, the lower end branch of upper level righting flow guide sleeve
Support is on the interior step of next stage ball seat.Using two-stage ball seat, the reliability of sealing can be improved, it is ensured that sand control construction is disposable
Success.
It is screwed with double male joint in the ball seat box thread at top as a further improvement of the utility model, it is described
The upper end of double male joint is screwed in the lower end box thread of box cupling, and the upper end of the box cupling is equipped on the box cupling that can be screwed on screen casing
Hold box thread, the middle section inner cavity of the box cupling is equipped with box cupling undergauge section, and the upper end of the box cupling undergauge section, which is equipped with, to be upwardly extended
The root of box cupling center bell and spigot, box cupling center bell and spigot is equipped with box cupling socket joint mouth sealing ring.Sand control pack releasing tool
Lower end periphery with sand control screen upper end be connected, lower end and the box cupling upper end box thread of sand control screen are mutually screwed on, sand control pack
The washing pipe lower end spreading of releasing tool is simultaneously equipped with washing pipe guide shoe, and washing pipe guide shoe passes through the box cupling of screen casing insertion box cupling center bell and spigot
In socket joint mouth sealing ring, such high pressure water flow can be injected into the lower section of screen casing from washing pipe, under bottom irrigation service aid
End outflow carries out sand washing, and after the sand block borehole wall of sand control screen periphery is built up, sand control pack releasing tool is given up, washing pipe guide shoe
And washing pipe rises with the tubing string of top, bottom irrigation service aid and sand control screen stay well.
It is symmetrically arranged with multiple row deflector hole on the circumference of the righting flow guide sleeve as a further improvement of the utility model,
The lower part of the righting flow guide sleeve is respectively equipped with the outer flange collar of flow guide sleeve, and the bottom of the spring is respectively supported at outside the flow guide sleeve
In flange collar.Water flow can enter righting flow guide sleeve centre bore from the upper port of righting flow guide sleeve and each deflector hole, can reduce water
Crushing loses, and improves sand washing effect.
The lower end periphery of the ball seat male thread is embedded with ball seat sealing ring as a further improvement of the utility model,
The periphery of the double male joint upper and lower ends male thread is embedded with pipe nipple sealing ring respectively.Ball seat sealing ring realizes ball seat and ball seat
Between or the sealing between ball seat and tubing string guide shoe；Pipe nipple sealing ring is realized between box cupling and double male joint and double public affairs are short
Sealing between section and ball seat.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments, and attached drawing only provides ginseng
It examines and illustrates to use, it is non-to limit the utility model.
Fig. 1 is the structural schematic diagram of the utility model small casing pipe well sand control bottom sand washing service aid.
Fig. 2 is ball seat in Fig. 1 with the enlarged drawing of lower portion.
In figure: 1. tubing string guide shoes；2. ball seat；2a. steel ball；2b. baffle；2b1. baffle permeable hole；2c. spring；2d. righting
Flow guide sleeve；2d1. deflector hole；The outer flange collar of 2d2. flow guide sleeve；2e. ball seat sealing ring；3. double male joint；3a. pipe nipple sealing ring；4.
Box cupling；4a. box cupling upper end box thread；4b. box cupling center bell and spigot；4c. box cupling socket joint mouth sealing ring.
Specific embodiment
As shown in Figures 1 and 2, the small casing pipe well sand control of the utility model is drawn with bottom sand washing service aid, including tubing string
Shoes 1, the upper port of tubing string guide shoe 1 are screwed with ball seat 2, and the upper port of ball seat 2 is equipped with ball seat box thread, and the lower end of ball seat 2 is equipped with
Ball seat male thread, the centre bore upper end of ball seat 2 are equipped with ball seat aditus laryngis, are equipped with up-small and down-big horn mouth and seat below ball seat aditus laryngis
Envelope has steel ball 2a, and the lower edge of steel ball 2a is resisted against the center of baffle 2b, is evenly distributed on the center of baffle 2b and circumference multiple
Baffle permeable hole 2b1, the lower end of baffle 2b are supported by spring 2c, and spring 2c is sleeved on righting flow guide sleeve 2d, righting flow guide sleeve
The upper port of 2d and bottom interval a distance of baffle 2b, the lower end of righting flow guide sleeve 2d is supported on the interior platform of tubing string guide shoe 1
On rank, centre bore and the tubing string guide shoe centre bore of righting flow guide sleeve 2d connects.
The lower end of upper level righting flow guide sleeve 2d is supported on the interior step of next stage ball seat, can be with using two-stage ball seat
Improve the reliability of sealing, it is ensured that the disposable success of sand control construction.
Double male joint 3 is screwed in the ball seat box thread at top, the upper end of double male joint 3 is screwed under box cupling 4
It holds in box thread, the upper end of box cupling 4 is equipped with the box cupling upper end box thread 4a that can be screwed on screen casing, and the middle section inner cavity of box cupling 4 is equipped with
Box cupling undergauge section, the upper end of box cupling undergauge section are equipped with the box cupling center bell and spigot 4b upwardly extended, box cupling center bell and spigot 4b's
Root is equipped with box cupling socket joint mouth sealing ring 4c.
The lower end periphery of sand control pack releasing tool is connected with the upper end of sand control screen, on the lower end and box cupling of sand control screen
End box thread 4a phase is screwed on, and the washing pipe lower end spreading of sand control pack releasing tool is simultaneously equipped with washing pipe guide shoe, and washing pipe guide shoe passes through sieve
Pipe is inserted into the box cupling socket joint mouth sealing ring 4c of box cupling center bell and spigot 4b.
The tension downlink that the high pressure water flow of washing pipe pushes steel ball 2a and baffle 2b to overcome spring 2c is come from above, water flows through ball
Seat aditus laryngis, baffle permeable hole 2b1 enter the centre bore of righting flow guide sleeve 2d, then flow out through tubing string guide shoe centre bore and carry out sand washing,
It allows sand to suspend, washes down tubing string, tubing string decentralization stops sand washing behind predetermined position；Spring 2c pushes baffle 2b uplink, steel at once
Ball 2a is set on ball seat aditus laryngis, cuts off water stream channel, gravel is avoided to enter screen casing inner cavity；Sand control screen is fallen under sand nature
Periphery, to set up the sand block borehole wall.Then sand control pack releasing tool is given up, and washing pipe guide shoe and washing pipe are with top
Tubing string rises, and bottom irrigation service aid and sand control screen stay well.Then sand control pack releasing tool is given up, bottom irrigation service
Tool and sand control screen stay well jointly.Washing pipe guide shoe is extracted from the bell and spigot 4b of box cupling center, rises with top tubing string.
Multiple row deflector hole 2d1 is symmetrically arranged on the circumference of righting flow guide sleeve 2d, the lower part of righting flow guide sleeve 2d is respectively equipped with
The outer flange collar 2d2 of flow guide sleeve, the bottom of spring 2c are respectively supported on the outer flange collar 2d2 of flow guide sleeve.Water flow can be from righting flow guide sleeve
The upper port of 2d and each deflector hole 2d1 enter righting flow guide sleeve centre bore, can reduce hydraulic losses, improve sand washing effect.
The lower end periphery of ball seat male thread is embedded with ball seat sealing ring 2e, the periphery of 3 upper and lower ends male thread of double male joint
It is embedded with pipe nipple sealing ring 3a respectively.Ball seat sealing ring 2e realize between ball seat and ball seat or ball seat 2 and tubing string guide shoe 1 it
Between sealing；Pipe nipple sealing ring 3a is realized between box cupling 4 and double male joint 3 and the sealing between double male joint 3 and ball seat 2.
The foregoing is merely the preferable possible embodiments of the utility model, patent that is non-therefore limiting to the utility model
Protection scope.In addition to the implementation, the utility model can also have other embodiments.It is all to use equivalent replacement or equivalent change
The technical solution to be formed is changed, is all fallen in the protection scope of the requires of the utility model.Technology of the utility model without description is special
Sign can realize that details are not described herein by or using the prior art.
Claims (5)
1. a kind of small casing pipe well sand control bottom sand washing service aid, including tubing string guide shoe, it is characterised in that: the tubing string guide shoe
Upper port be screwed with ball seat, the upper port of the ball seat is equipped with ball seat box thread, and the lower end of the ball seat is equipped with ball seat public affairs spiral shell
Line, the centre bore upper end of the ball seat are equipped with ball seat aditus laryngis, are equipped with up-small and down-big horn mouth and seat below the ball seat aditus laryngis
Envelope has steel ball, and the lower edge of the steel ball is resisted against the center of baffle, is evenly distributed on the center of the baffle and circumference multiple
Baffle permeable hole, the lower end of the baffle are supported by spring, and the spring pocket is on righting flow guide sleeve, the righting flow guide sleeve
Upper port and the baffle bottom interval a distance, the lower end of the righting flow guide sleeve is supported on the tubing string guide shoe
On interior step, centre bore and the tubing string guide shoe centre bore of the righting flow guide sleeve connect.
2. small casing pipe well sand control according to claim 1 bottom sand washing service aid, it is characterised in that: the ball seat string
Connection is screwed with two-stage, and the lower end of upper level righting flow guide sleeve is supported on the interior step of next stage ball seat.
3. small casing pipe well sand control according to claim 1 or 2 bottom sand washing service aid, it is characterised in that: be located at top
Double male joint is screwed in the ball seat box thread in portion, the upper end of the double male joint is screwed in the lower end box thread of box cupling, institute
The upper end for stating box cupling is equipped with the box cupling upper end box thread that can be screwed on screen casing, and the middle section inner cavity of the box cupling is equipped with box cupling undergauge
Section, the upper end of the box cupling undergauge section are equipped with the box cupling center bell and spigot upwardly extended, the root of box cupling center bell and spigot
Equipped with box cupling socket joint mouth sealing ring.
4. small casing pipe well sand control according to claim 2 bottom sand washing service aid, it is characterised in that: the righting is led
It flows and is symmetrically arranged with multiple row deflector hole on the circumference of set, the lower part of the righting flow guide sleeve is respectively equipped with the outer flange collar of flow guide sleeve, described
The bottom of spring is respectively supported in the outer flange collar of the flow guide sleeve.
5. small casing pipe well sand control according to claim 3 bottom sand washing service aid, it is characterised in that: the ball seat is public
The lower end periphery of screw thread is embedded with ball seat sealing ring, and the periphery of the double male joint upper and lower ends male thread is embedded with pipe nipple respectively
Sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920339478.5U CN209654011U (en) | 2019-03-18 | 2019-03-18 | Small casing pipe well sand control bottom sand washing service aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920339478.5U CN209654011U (en) | 2019-03-18 | 2019-03-18 | Small casing pipe well sand control bottom sand washing service aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209654011U true CN209654011U (en) | 2019-11-19 |
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ID=68527304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920339478.5U Active CN209654011U (en) | 2019-03-18 | 2019-03-18 | Small casing pipe well sand control bottom sand washing service aid |
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| CN (1) | CN209654011U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901125A (en) * | 2019-12-03 | 2021-06-04 | 中国石油天然气股份有限公司 | Secondary sand control tubular column of casing damage detritus well |
-
2019
- 2019-03-18 CN CN201920339478.5U patent/CN209654011U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901125A (en) * | 2019-12-03 | 2021-06-04 | 中国石油天然气股份有限公司 | Secondary sand control tubular column of casing damage detritus well |
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