CN211314178U

CN211314178U - Constant flow water distributor for water injection well

Info

Publication number: CN211314178U
Application number: CN201922299874.2U
Authority: CN
Inventors: 李桂婷; 张永祥; 郭文峰
Original assignee: Shandong Bonuoli Petroleum Equipment Co ltd
Current assignee: Shandong Bonuoli Petroleum Equipment Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-08-21
Anticipated expiration: 2029-12-19

Abstract

A constant flow water distributor for water injection well is composed of locating tube, upper joint, water outlet tube, internal and external sealing rings, flow regulating piston, spring, internal and external tubes, limiting pin, switch tube, lower joint, and underground measuring and regulating unit with fixed jaws in the locating tube and movable jaws in the switch tube, water outlet tube communicated with water outlet hole, water injection pressure on flow regulating piston for making flow regulating piston to compress spring, diameter expanding segment under flow regulating piston, water injection channel communicated with water injection channel, and water injection quantity regulating segment under water injection hole, the water injection quantity is basically kept unchanged, and the constant flow injection allocation of the stratum is realized.

Description

Constant flow water distributor for water injection well

Technical Field

The utility model relates to an underground separate layer water injection tool for oil field water injection, in particular to a constant flow water distributor for a water injection well.

Background

The water injection well is injected with water during the water injection development of the oil field, the water injection well is generally provided with a plurality of water injection layers, the water injection amount of each water injection layer is different, each water injection layer is separated by a packer, a water injection distributor is used for distributing water for each layer according to the water injection amount, and the water injection distributor is required during water distribution, namely, each water injection layer is provided with one water injection distributor. The existing water injection distributor is a hollow water distributor, after the injection amount of the existing hollow water injection distributor is adjusted, the water injection amount cannot be kept unchanged and still fluctuates along with the change of the water injection pressure of the ground and the water absorption capacity of the stratum, the actual injection amount still has a larger difference with the designed injection amount, the stratum water injection amount is inaccurate, the injection allocation requirement cannot be met, the oil field cannot achieve the ideal water injection effect, and the development and production of the oil field are influenced.

Disclosure of Invention

The utility model aims at providing a water injection well constant flow water injection mandrel overcomes the problem that current measure and regulate integration water injection distributor exists, makes the water injection volume on water injection layer stable after the measure and regulate.

The purpose of the utility model is realized like this: comprises a positioning pipe, an upper joint, a water outlet barrel, an inner sealing ring, an outer sealing ring, a flow regulating piston, a spring, an inner barrel, a limiting pin, a switch pipe and a lower joint, wherein the positioning pipe is arranged on the upper thread of the inner barrel, a claw fixing groove is arranged on the upper part of the positioning pipe, a pressure transmitting hole is arranged below the upper thread of the inner barrel, a water outlet hole is arranged on the lower part of the inner barrel, the flow regulating piston and the spring are sleeved on the inner barrel, the flow regulating piston is arranged above the spring, the lower end surface of the spring is seated on a shoulder of the inner barrel, the inner sealing ring is arranged between the flow regulating piston and the inner barrel and is arranged below the pressure transmitting hole, the upper thread of the inner barrel is connected with the lower inner thread of the upper joint, the upper part of the water outlet barrel is connected with the lower part of the upper joint through external thread, an annular cavity between the inner wall below the upper thread of the water outlet, the middle part of the water outlet barrel is provided with a water injection hole which is positioned below the outer sealing ring, the lower boss of the flow adjusting piston is matched with the inner boss below the water injection hole of the water outlet barrel, the lower boss of the flow adjusting piston is provided with a throttling and reducing section, the inner boss below the water injection hole of the water outlet barrel is provided with an expanding section, the upper part of the switch tube is provided with a water outlet groove, the lower part of the switch tube is provided with a movable claw groove, the switch tube is inserted into the lower part of the inner tube, the inner tube is provided with a limit pin which is inserted into the water outlet groove, when the switch tube rotates to the state that the water outlet groove is communicated with the water outlet hole, the limit pin can limit the rotation of the switch tube, when the switch tube rotates to the state that the rotation is limited by the limit pin, the water outlet groove is not communicated with the water outlet hole, the upper part of the lower joint is connected with the lower part of, the lower part of the inner cylinder is inserted into the upper part of the lower joint, and the insertion section of the lower part of the inner cylinder, which is inserted into the upper part of the lower joint, is provided with a sealing ring to seal the gap of the insertion section.

The utility model has the advantages that: and (2) putting the underground measuring and adjusting instrument into the fixed claw groove on the positioning pipe, putting the movable claw of the underground measuring and adjusting instrument into the movable claw groove on the switch pipe, driving the switch pipe to rotate by the underground measuring and adjusting instrument, communicating the water outlet groove with the water outlet hole, enabling the water injection pressure to act on the flow adjusting piston to enable the flow adjusting piston to compress the spring to move downwards, enabling the boss at the lower part of the flow adjusting piston to enter the diameter expanding section, communicating the water injection channel, and adjusting the communication area of the water outlet groove and the water outlet hole to adjust the water injection amount. When the surface water injection pressure and the stratum water absorption capacity fluctuate, the position of the flow regulating piston in the axial direction changes, and the positions of the inner bosses below the water injection holes on the water outlet barrel entering the throttling and reducing section are different, so that the water injection amount is basically kept unchanged, and the stratum constant flow injection allocation is realized. Therefore, the utility model overcomes the problem that current measure and regulate integration water injection distributor exists can automatic compensation, makes the water injection volume of measure and regulate back water injection mandrel stable, and the stratum injection allocation is accurate, can reach the injection allocation requirement, makes the oil field can reach the water injection effect of ideal, has apparent economic benefits.

Drawings

Figure 1 is a structural assembly semi-sectional view of the present invention.

Figure 2 is a cross-sectional view of the member of figure 1 taken along line a-a.

Fig. 3 is an assembled view of the parts 1, 8 of fig. 1, designed as an assembly.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As can be seen from the figure, the embodiment of the utility model comprises a positioning pipe 1, an upper joint 2, a water outlet barrel 3, an inner sealing ring 4, an outer sealing ring 5, a flow adjusting piston 6, a spring 7, an inner barrel 8, a limit pin 9, a sealing ring 10, a switch tube 11 and a lower joint 12, wherein the positioning pipe 1 is arranged on the upper thread of the inner barrel 8, the upper part of the positioning pipe 1 is provided with a fixed claw groove 1-1, a pressure transmitting hole 8-1 is arranged below the upper thread of the inner barrel 8, the lower part of the inner barrel 8 is provided with a water outlet hole 8-2, the flow adjusting piston 6 and the spring 7 are sleeved on the inner barrel 8, the flow adjusting piston 6 is arranged above the spring 7, the lower end surface of the spring 7 is seated on the shoulder of the inner barrel 8, the inner sealing ring 4 is arranged between the flow adjusting piston 6 and the inner barrel 8, the inner sealing ring 4 is arranged below the pressure transmitting hole 8-1, the upper part of the water outlet barrel 3 is connected with the lower part external thread of the upper joint 2, the annular cavity between the inner wall below the upper part thread of the water outlet barrel 3 and the inner cylinder 8 is a flow adjusting piston 6, an outer sealing ring 5 is arranged between the flow adjusting piston 6 and the inner wall below the upper part thread of the water outlet barrel 3, the middle part of the water outlet barrel 3 is provided with a water injection hole 3-1, the water injection hole 3-1 is positioned below the outer sealing ring 5, the lower boss of the flow adjusting piston 6 is matched with the inner boss below the water injection hole 3-1 of the water outlet barrel 3, the lower boss of the flow adjusting piston 6 is provided with a throttling and reducing section 6-1, the inner boss below the water injection hole 3-1 of the water outlet barrel 3 is provided with an expanding section 3-2, the upper part of the switch tube 11 is provided with a water outlet groove 11-1, the lower part of the switch tube 11, in the lower part that switch tube 11 inserted inner tube 8, installation spacer pin 9 on the inner tube 8, spacer pin 9 inserted go out basin 11-1 in, switch tube 11 rotated go out basin 11-1 with apopore 8-2 communicate with each other, spacer pin 9 can restrict switch tube 11 rotatory, switch tube 11 rotated to when being restricted by spacer pin 9 and rotate, go out basin 11-1 with apopore 8-2 not communicate with each other, the upper portion of lower clutch 12 is connected with the inferior part of play urceolus 3, makes switch tube 11 insert in the lower part of lower clutch 12, in the upper portion of lower clutch 12 was inserted to the lower part of inner tube 8, the lower part of inner tube 8 was inserted in the upper portion of lower clutch 12, the section of inserting in the upper portion of lower clutch 12 was inserted to the lower part of inner tube 8 had sealing washer 10, registration arm 1 is on inner tube 8. The positioning tube 1 and the inner cylinder 8 can be of an integral structure or can be an assembly, and the assembly is designed to be suitable from the viewpoint of saving material cost and processing cost. If the combination is designed, the inner cylinder 8 is internally threaded from the upper thread, and the positioning pipe 1 is externally threaded from the lower part to be integrally connected, as shown in fig. 3.

The upper part of the upper joint 1 is provided with an oil pipe internal thread, the lower part of the lower joint 12 is provided with an oil pipe external thread, and the oil pipe internal thread on the upper part of the upper joint 1 is matched with the oil pipe external thread on the lower part of the lower joint 12. The outer diameter of the positioning pipe 1 is smaller than the inner diameter of an oil pipe which is in threaded connection with the upper oil pipe of the upper joint 1.

An upper bearing is arranged between the upper end of the switch tube 11 and the inner shoulder of the inner cylinder 8, and a lower bearing is arranged between the lower end of the switch tube 11 and the inner shoulder of the lower joint 18, so that friction is reduced, and the switch tube 11 is convenient to rotate.

When in use, the utility model is arranged at the water injection layer part. When the flow needs to be adjusted, the underground measuring and adjusting instrument is put into the underground measuring and adjusting instrument, a fixed claw of the underground measuring and adjusting instrument enters a fixed claw groove 1-1 on the positioning pipe 1, a moving claw of the underground measuring and adjusting instrument enters a moving claw groove 11-2 on the switch pipe 11, the fixed part of the underground measuring and adjusting instrument is supported on the positioning pipe 1 and does not move, the rotating part of the underground measuring and adjusting instrument can drive the switch pipe 11 to rotate, the water outlet groove 11-1 is communicated with the water outlet hole 8-2, the water injection pressure acts on the flow adjusting piston 6, the flow adjusting piston 6 compresses the spring 7 to move downwards, a boss at the lower part of the flow adjusting piston 6 enters the diameter expanding section 3-2, and the water injection channel is communicated with the water injection channel, so that water can be injected. The water injection amount is adjusted by adjusting the communication area of the water outlet groove 11-1 and the water outlet hole 8-2. When the surface water injection pressure and the stratum water absorption capacity fluctuate, the position of the flow regulating piston 6 in the axial direction changes, the positions of the throttling and reducing sections 6-1 entering the inner lug bosses below the water injection holes 3-1 on the water outlet barrel 3 are different, so that the flow areas of water injection channels are different, the water injection amount is basically kept unchanged, and the stratum constant flow injection allocation is realized.

Claims

1. The utility model provides a water injection well constant flow water injection mandrel, includes registration arm (1), top connection (2), play water drum (3), inner seal circle (4), outer sealing washer (5), flow control piston (6), spring (7), inner tube (8), spacer pin (9), switch tube (11), lower clutch (12), characterized by: a positioning pipe (1) is arranged on the upper thread of the inner cylinder (8), a fixed claw groove (1-1) is arranged on the upper part of the positioning pipe (1), a pressure transmission hole (8-1) is arranged below the upper thread of the inner cylinder (8), a water outlet hole (8-2) is arranged on the lower part of the inner cylinder (8), a flow adjusting piston (6) and a spring (7) are sleeved on the inner cylinder (8), the flow adjusting piston (6) is positioned above the spring (7), the lower end surface of the spring (7) is seated on the shoulder of the inner cylinder (8), an inner sealing ring (4) is arranged between the flow adjusting piston (6) and the inner cylinder (8), the inner sealing ring (4) is positioned below the pressure transmission hole (8-1), the upper thread of the inner cylinder (8) is connected with the lower inner thread of the upper joint (2), the upper part of the water outlet cylinder (3) is connected with the lower outer thread of the upper joint (2), and an annular cavity between the inner wall below the upper thread of the water outlet cylinder (3) and the 6) An outer sealing ring (5) is arranged between a flow adjusting piston (6) and the inner wall below the upper thread of a water outlet barrel (3), a water injection hole (3-1) is arranged in the middle of the water outlet barrel (3), the water injection hole (3-1) is arranged below the outer sealing ring (5), a lower boss of the flow adjusting piston (6) is matched with an inner boss below the water injection hole (3-1) of the water outlet barrel (3), a throttling and reducing section (6-1) is arranged above the lower boss of the flow adjusting piston (6), an expanding section (3-2) is arranged below the inner boss below the water injection hole (3-1) of the water outlet barrel (3), a water outlet groove (11-1) is arranged at the upper part of a switch tube (11), a movable claw groove (11-2) is arranged at the lower part of the switch tube (11), and the switch tube (11) is inserted into the lower part of an inner barrel (8), the inner cylinder (8) is provided with a limiting pin (9), the limiting pin (9) is inserted into the water outlet groove (11-1), the switch tube (11) rotates until the water outlet groove (11-1) is communicated with the water outlet hole (8-2), the limiting pin (9) can limit the switch tube (11) to rotate, when the switch tube (11) rotates until the switch tube is limited to rotate by the limiting pin (9), the water outlet groove (11-1) is not communicated with the water outlet hole (8-2), the upper part of the lower joint (12) is connected with the lower part of the water outlet barrel (3), so that the switch tube (11) is inserted into the lower part of the lower joint (12), the lower part of the inner cylinder (8) is inserted into the upper part of the lower joint (12), and the lower part of the inner cylinder (8) is inserted into the insertion section of the upper part of the lower joint (12) and a sealing ring (10) is arranged on the insertion section.