CN213331026U

CN213331026U - Ball throwing and collecting tool matched with general water injection well pipe column

Info

Publication number: CN213331026U
Application number: CN202120556662.2U
Authority: CN
Inventors: 张翠波
Original assignee: Liaoning Liaohe Haotian Petroleum Machinery Rubber Chemical Co ltd
Current assignee: Liaoning Liaohe Haotian Petroleum Machinery Rubber Chemical Co ltd
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-06-01
Anticipated expiration: 2031-03-18

Abstract

The utility model belongs to the technical field of the oil field water injection development is supporting. The ball throwing and collecting tool structurally comprises a ball throwing device and a ball collecting device, wherein the ball throwing device contains a blocking selecting ball through an annular cavity between a central sieve tube and an outer sleeve, a release piston with a release pin is in sealed insertion connection with the lower end of the outer sleeve, and after the water pressure is increased, the release pin is out of work, the release piston moves downwards to release the blocking selecting ball, so that the purpose of throwing the blocking selecting ball is realized; the lower end of the ball throwing device is connected with a ball collecting device, and the ball collecting work is completed through a ball collecting basket arranged on the ball collecting device. The ball throwing and collecting tool can set the shearing force of the release pins and the quantity of the selective plugging balls in advance, the selective plugging balls after being released automatically select the well wall perforation blastholes with high water absorption capacity to be plugged, and the water injection pressure is improved, so that the longitudinal water absorption profile of the water injection well is adjusted, the contradiction between water injection layers is relieved, and the water injection effect is improved.

Description

Ball throwing and collecting tool matched with general water injection well pipe column

Technical Field

The utility model relates to a supporting ball instrument of receiving of throwing of general water injection well tubular column belongs to the supporting technical field of oil field water injection development.

Background

Water injection development is a necessary means for realizing the yield increase and the stable yield of the oil field. Due to the fact that the oil layer is heterogeneous, the physical properties and water absorption capacity of the oil layer and the oil layer are different from one another and the same oil layer is different from one another, water absorption of different water injection layers of the same water injection well is uneven, injected water at the same water injection layer penetrates along a high-permeability zone, and the water injection effect is seriously affected. At present, according to different water injection well conditions, measures such as separate-zone water injection or chemical profile control are generally adopted to improve the water injection effect. However, many well water injection well sections are large, the layers are multiple, some interlayers are thin, and the separate-layer water injection pipe column can only realize sectional water injection; high chemical profile control cost and shorter effective period after multiple rounds of profile control.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a supporting ball instrument of receiving of throwing of general water injection well tubular column, should throw and receive the ball instrument and go down to the design well section, the rethread water injection is suppressed and is cut off the release pin of ball injector wherein, selects stifled ball to be released, and the wall of a well perforation porthole of the high water absorption ability of automatic selection carries out the shutoff, improves water injection pressure to reach the vertical section of absorbing water of adjustment water injection well, alleviate contradiction between the water injection layer, improve the purpose of water injection effect. When the well is repaired next time, the pipe is lifted, the ball collector arranged at the bottom of the pipe column can recover the selected plugging ball in the shaft and reuse the selected plugging ball.

For solving the above problems, the specific technical scheme of the utility model is as follows: a ball throwing and collecting tool matched with a general water injection well pipe column comprises a ball throwing device and a ball collecting device, wherein the ball throwing device structurally comprises a central hole of an upper joint, a central screen pipe and a ball collecting device, wherein an internal thread is arranged in the central hole of the upper joint and is connected with one end of the central screen pipe, and a plurality of strip through holes are uniformly distributed in the central screen pipe along the pipe wall; the other end of the central sieve tube is in threaded connection with a lower joint; the outer circumference of the upper joint is provided with external threads, the external threads are connected with one end of an outer sleeve, a plurality of plugging selecting balls are arranged in an annular cavity formed between the outer sleeve and a central sieve tube, and the width of a long through hole of the central sieve tube is smaller than the diameter of each plugging selecting ball; the outer circumference of the lower joint is coaxially matched with a release piston, release pins are uniformly distributed on the circumference of the lower end of the release piston, the release pins are inserted into the lower joint along the radial direction, and the upper end of the release piston is in sealed insertion connection with the lower end of the outer sleeve through an O-shaped sealing ring arranged on the outer circumference; the lower end of the lower joint is in threaded connection with a ball seat coupling, a steel ball is seated in an inner hole of the ball seat coupling, and the lower end of the ball seat coupling is connected with a ball collector.

The ball collector structure comprises an internal thread arranged at the lower end of a ball seat coupling, an extension screen pipe in threaded connection with the internal thread, a ball scraper connected with the bottom of the extension screen pipe, a connecting rod arranged at the central axis of the lower end of the ball scraper, a ball collecting basket with an upward opening arranged on the periphery of the connecting rod, a nut fixedly connected with the lower end of the ball collecting basket, and a threaded connection between the nut and the connecting rod; an annular opening is formed between the upper end edge of the ball collecting basket and the outer circumference of the ball scraping device, and the selected blocking ball enters the ball collecting basket through the annular opening.

The annular cavity between the outer sleeve and the central sieve tube can contain 100-600 selected plugging balls with different specifications.

Receive the circumference of ball basket on evenly distributed a plurality of sand leakage holes, the length that leaks sand hole is 30 ~ 60mm, the hole width is 4 ~ 8mm, and receive the ball basket and accomodate less than 600 selection stifled balls.

The selective plugging ball is of a solid spherical structure made of modified engineering plastics, the diameter is phi 16-22 mm, the density is 0.8-0.95 g/cm for carrying out heavy planting, and the compressive strength is larger than or equal to 20 Mpa.

After a ball throwing and collecting tool matched with a pipe column of the general water injection well injects water and pressurizes, the release piston is subjected to water injection pressure due to the setting of the steel ball, so that the release pin is sheared, the release piston moves towards the lower joint, and the selective plugging ball outlet of the outer sleeve is exposed to release the selective plugging ball. Under the push of injected water, the blocking selecting ball automatically selects the well wall perforation blasthole with high water absorption capacity for blocking, and improves the water injection pressure, thereby achieving the purposes of adjusting the longitudinal water absorption profile of the water injection well, relieving contradictions between water injection layers and improving the water injection effect.

Connect in ball seat coupling bottom and receive the ball structure, guarantee that shutoff work finishes the back, when the lifting means goes out of the well, collect whole shutoff ball in receiving the ball basket, improve collection efficiency.

The selective plugging ball matched with the water injection well pipe column of the cage system is made of modified engineering plastics, so that the product cost is reduced, and the product performance is improved.

Drawings

Fig. 1 is a schematic structural diagram of a ball injector in a ball throwing and collecting tool matched with a general water injection well pipe column.

FIG. 2 is a schematic view of the opening of a ball injector in a ball throwing and collecting tool matched with a conventional water injection well pipe column.

Fig. 3 is a schematic structural diagram of a ball collector in a ball throwing and collecting tool matched with a main water injection well pipe column.

Detailed Description

As shown in fig. 1 to 3, a ball throwing and collecting tool matched with a conventional water injection well pipe column is provided with an internal thread in a central hole of an upper joint 1 and is connected with one end of a central sieve pipe 3, and a plurality of strip through holes are uniformly distributed on the central sieve pipe 3 along the pipe wall; the other end of the central sieve tube 3 is connected with a lower joint 7 through an external thread; an external thread is arranged on the outer circumference of the upper joint 1 and is connected with one end of an outer sleeve 4, a plurality of plugging selecting balls 2 are arranged in an annular cavity formed between the outer sleeve 4 and a center screen pipe 3, and the width of a long through hole of the center screen pipe 3 is smaller than the diameter of the plugging selecting balls 2; the outer circumference of the lower joint 7 is coaxially matched with a release piston 5, release pins 6 are uniformly distributed on the circumference of the lower end of the release piston 5, the release pins 6 are inserted into the lower joint 7 along the radial direction, and the upper end of the release piston 5 is in sealed insertion connection with the lower end of the outer sleeve 4 through an O-shaped sealing ring 14 arranged on the outer circumference; the ball seat coupling 8 is in threaded connection with the lower end of the lower joint 7, the steel ball 15 is seated in the inner hole of the ball seat coupling 8, and the steel ball 15 plays a sealing role in the water injection process, so that the water pressure in the central sieve tube 3 is increased, and the release piston 5 is pushed to shear the release pin.

The ball collector structure comprises an internal thread arranged at the lower end of a ball seat coupling 8, an extension screen pipe 9 is in threaded connection with the internal thread, the bottom of the extension screen pipe 9 is connected with a ball scraper 10, a connecting rod 12 is arranged at the central axis of the lower end of the ball scraper 10, a ball collecting basket 11 with an upward opening is arranged on the periphery of the connecting rod 12, a screw cap 13 fixedly connected with the lower end of the ball collecting basket 11 is fixedly connected with the lower end of the ball collecting basket 11, and the screw cap 13 is in threaded; an annular opening is formed between the upper end edge of the ball collecting basket 11 and the outer circumference of the ball scraping device 10, and the selective plugging ball 2 enters the ball collecting basket 11 through the annular opening.

The annular cavity between the outer sleeve 4 and the central sieve tube 3 can contain 100-600 selective plugging balls 2 with different specifications.

Receive the circumference of ball basket 11 on evenly distributed a plurality of sand leakage holes, the length that leaks sand leakage hole is 30 ~ 60mm, the hole width is 4 ~ 8mm, and receive ball basket 11 and accomodate less than 600 selection stifled balls 2.

The working process of the ball throwing and collecting tool used in matching with the selected blocking ball is as follows: the water pipe connected with the upper joint 1 injects high-pressure water into the center screen pipe, the high-pressure water enters the cavity of the outer sleeve 4 through the long through hole of the center screen pipe 3, when the water reaches a certain pressure, the release pin 6 on the release piston 5 is damaged by shearing force, the release piston moves downwards to expose the lower outlet of the outer sleeve 4, the blocking selecting ball 2 moves out of the bin under the push of the water, the dropping of the blocking selecting ball is realized, after the blocking task is completed, the pressure of the well pipe is reduced, in the process of lifting the tool, the blocking device completely falls back into the ball collecting basket 11 of the ball collecting device, the recovery of the blocking selecting ball is realized, and the blocking device can be applied again.

Compared with the prior chemical profile control technology, the beneficial effects of the utility model are that: low cost, quick effect and long validity period; the quantity of the selected plugging balls is controllable, and the method has the advantages of safety, environmental protection, no pollution to stratum and the like.

Claims

1. The utility model provides a supporting ball instrument of receiving of throwing of general water injection well tubular column which characterized in that: the ball injector is composed of a ball injector and a ball collector, the ball injector structurally comprises a central hole of an upper joint (1) which is provided with internal threads and is connected with one end of a central sieve tube (3), and the central sieve tube (3) is uniformly provided with a plurality of strip through holes along the tube wall; the other end of the central sieve tube (3) is in threaded connection with a lower joint (7); an external thread is arranged on the outer circumference of the upper joint (1), the external thread is connected with one end of an outer sleeve (4), a plurality of plugging selecting balls (2) are arranged in an annular cavity formed between the outer sleeve (4) and a center sieve tube (3), and the width of a long through hole of the center sieve tube (3) is smaller than the diameter of the plugging selecting balls (2); the outer circumference of the lower joint (7) is coaxially matched with a release piston (5), release pins (6) are uniformly distributed on the circumference of the lower end of the release piston (5), the release pins (6) are inserted into the lower joint (7) along the radial direction, and the upper end of the release piston (5) is in sealed insertion connection with the lower end of the outer sleeve (4) through an O-shaped sealing ring (14) arranged on the outer circumference; the lower end of the lower joint (7) is in threaded connection with a ball seat coupling (8), a steel ball (15) is seated in an inner hole of the ball seat coupling (8), and the lower end of the ball seat coupling (8) is connected with a ball collector.

2. The ball delivery and collection tool of claim 1, wherein: the ball collector structure comprises an internal thread arranged at the lower end of a ball seat coupling (8), an extension sieve tube (9) is in threaded connection with the internal thread, the bottom of the extension sieve tube (9) is connected with a ball scraper (10), a connecting rod (12) is arranged at the central axis of the lower end of the ball scraper (10), a ball collecting basket (11) with an upward opening is arranged on the periphery of the connecting rod (12), a screw cap (13) fixedly connected with the lower end of the ball collecting basket (11) is fixedly connected with the lower end of the ball collecting basket, and the screw cap (13) is in threaded connection with the connecting; an annular opening is formed between the upper end edge of the ball collecting basket (11) and the outer circumference of the ball scraping device (10), and the ball selecting and blocking device (2) enters the ball collecting basket (11) through the annular opening.

3. The ball delivery and collection tool of claim 1, wherein: and 100-600 selective plugging balls (2) with different specifications are accommodated in an annular cavity between the outer sleeve (4) and the central sieve tube (3).

4. The ball delivery and collection tool of claim 2, wherein: receive a plurality of sand leakage holes of evenly distributed on the circumference of ball basket (11), the length that leaks sand leakage hole is 30 ~ 60mm, the hole width is 4 ~ 8mm, and receive ball basket (11) and can accomodate selection stifled ball (2) below 600.

5. The ball delivery and collection tool of claim 1, wherein: the selective plugging ball is of a solid spherical structure made of modified engineering plastics, the diameter is phi 16-22 mm, the density is 0.8-0.95 g/cm for carrying out heavy planting, and the compressive strength is larger than or equal to 20 Mpa.