CN212272106U

CN212272106U - Preset throttling device

Info

Publication number: CN212272106U
Application number: CN201922085369.8U
Authority: CN
Inventors: 王丽珺; 王安平; 李海东; 王劲舟; 杨成
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2021-01-01
Anticipated expiration: 2029-11-28

Abstract

The utility model belongs to the technical field of oil industry downhole tool, specifically provide a preset flow controller, including preset working barrel (1), delivery tool (2), throttle core (3) can link in preset working barrel (1), and delivery tool (2) can be connected to the left end of throttle core (3), have solved the problem that flow controller field seal effect is not good and can't the deblocking salvage among the prior art, the invention provides a reliable downhole tool that field usage effect is fine, and seal structure is more effective and salvage more easily.

Description

Preset throttling device

Technical Field

The utility model belongs to the technical field of oil industry downhole tool, concretely relates to preset flow controller.

Background

In field application, in order to meet production requirements, the yield of a gas well needs to be adjusted or drainage and gas production are carried out in the later production stage of the gas well for fully exerting the productivity of the gas well, a preset type throttle existing in a shaft needs to be fished, and due to the particularity of the sealing structure of the existing throttle, the situation that the field sealing effect is poor or the fishing cannot be unsealed can occur.

SUMMERY OF THE UTILITY MODEL

The utility model provides a preset throttle, which aims to overcome the problem of poor field sealing effect of the throttle in the prior art; the second purpose is to overcome the problem that the throttle can not be unsealed and salvaged in the prior art.

Therefore, the utility model provides a preset flow controller, including presetting the working barrel, delivering the instrument, throttle core, the throttle core can be anchored in presetting the working barrel, and the left end joinable of throttle core delivers the instrument.

The delivery tool comprises an upper joint, a mandrel, a locking ring, a clamping block, a clamping seat and a lower joint, wherein the locking ring and the upper joint are sequentially sleeved outside the left section of the mandrel from inside to outside, the mandrel is positioned on the horizontal shaft of the upper joint, the clamping seat is sleeved outside the middle section of the mandrel, the left end of the clamping seat is connected with the right end of the upper joint, the clamping block is connected to the upper surface of the clamping seat, and the right end of the mandrel can be connected with.

The delivery tool further comprises a connecting piece, the connecting piece comprises a first shear pin and a first screw, the first shear pin is respectively connected with the left section of the mandrel and the upper joint, and the first screw is respectively connected with the upper joint and the outer sleeve clamping seat.

The throttling core comprises a locking block shaft, a locking cap, a locking block body, a locking block, a sealing ring, a sealing body, a gasket, an air nozzle seat, an air nozzle and a sand prevention cylinder assembly, a clamping seat on a delivery tool is connected to the left end of the locking block shaft, the locking cap is sequentially connected from left to right in the upper right section of the locking block shaft, the locking block body and the sealing body are installed on the locking block body, the sealing ring is sleeved on the sealing body, the air nozzle seat is connected to the right end of the locking block shaft inside, the air nozzle is installed on the air nozzle seat, the gasket is connected between the air nozzle seat and the air nozzle, the gasket is located at the left end of the air nozzle, and the sand prevention cylinder assembly is externally connected.

The throttling core further comprises a fastening connecting piece, the fastening connecting piece comprises a second shear pin, a third shear pin, a second screw and a third screw, the second shear pin is respectively connected with the lower joint and the lock block body, the second screw is respectively connected with the lock block body and the sealing body, the third screw is respectively connected with the sealing body and the sand control cylinder assembly, and the third shear pin is respectively connected with the sealing body and the air nozzle seat.

The sand prevention cylinder assembly comprises a cylinder body, a plug and a fourth shear pin, and the right end of the cylinder body is connected with the plug through the fourth shear pin.

The sealing ring is a V-shaped sealing ring.

The V type sealing washer is including fitting with a contraceptive ring, sealing ring and lower ring, and it connects gradually from the left hand right side to fit with a contraceptive ring, sealing ring and lower ring, and the quantity of sealing ring is 4, and 4 sealing rings are connected side by side from the left hand right side.

The material that upper ring and lower ring adopted is 30Cr13, and the material that the sealing ring adopted is polytetrafluoroethylene.

The V-shaped sealing ring is in interference fit with the preset working barrel.

The utility model has the advantages that: the utility model provides a preset type throttler, including presetting the working barrel, delivering the instrument, throttle core can connect in presetting the working barrel, throttle core's left end can connect the delivering instrument, delivering instrument right-hand member lower clutch and throttle core in lock block body inside be connected through the second shear pin, delivering instrument area throttle core when delivering in presetting the working barrel, after the power of delivering downwards sheared first shear pin, delivering instrument except dabber, lower clutch, all other parts promote lock block axial downward movement, make lock block slide to lock block body outside and preset working barrel anchoring, throttle core sealing washer reachs the design position this moment, throttle core anchoring and sealed work are all accomplished at this moment, lift up delivering instrument again and cut off lower clutch and lock block body connected second shear pin, delivering instrument will break away from throttle core, propose the pit shaft and accomplish the mission, at the moment, the aperture of an internal air tap of the throttling core can be adjusted to adjust the yield of the gas well; the preset working barrel is firstly put to a specified position of a well bottom, the delivery tool is mainly used when the throttle is delivered in the well, the effect of the delivery tool is that a throttle core is delivered into the preset working barrel, a locking block in the throttle core is opened to be anchored and sealed with the preset working barrel, after the throttle core is anchored and sealed, the yield of the gas well is regulated through the aperture of an air nozzle in the throttle core, the yield and the pressure gradually decrease along with the continuous production of gas, the throttle finishes the mission after the gas decreases to a certain degree, the tool can be salvaged out, if the tool can not be salvaged, parts such as the air nozzle, a sand control barrel assembly and the like can be cut off from the throttle core by using the operation of a steel wire rope, the central hole passage of the throttle core is communicated to form an air flow passage, the later-stage production of the gas well is not influenced, the cost generated when the tool can not be salvaged is, the economic benefit is improved; the utility model changes the sealing mode and structure on the basis of the original preset restrictor, the V-shaped sealing ring is contacted, anchored and sealed with the preset working barrel through the locking block and the V-shaped sealing ring, the V-shaped sealing ring comprises an upper ring, a sealing ring and a lower ring, the upper ring, the sealing ring and the lower ring are connected in sequence from left to right, the number of the sealing rings is 4, the 4 sealing rings are connected side by side from left to right, the material adopted by the upper ring and the lower ring is 30Cr13, the material adopted by the sealing ring is polytetrafluoroethylene, and the V-shaped sealing ring is in interference fit with the preset working barrel; the sealing effect is good, and compared with preset throttlers with other structures, the tool has the following advantages: the seat sealing success rate is high, the fishing is easy, the whole structure is simple, the sealing effect is good, the central pore passage can be dredged, and the like.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a preset choke configuration;

FIG. 2 is a schematic view of a delivery tool configuration;

FIG. 3 is a schematic view of a throttle core configuration;

FIG. 4 is a schematic diagram of a sand control cartridge assembly construction.

Description of reference numerals: 1. presetting a working barrel; 2. a delivery tool; 3. a throttling core; 4. an upper joint; 5. a mandrel; 6. a first shear pin; 7. a locking ring; 8. a first screw; 9. a clamping block; 10. a card holder; 11. a lock block shaft; 12. a lock cap; 13. a lock block body; 14. a locking block; 15. a seal ring; 16. a seal body; 17. a gasket; 18. an air nozzle seat; 19. an air tap; 20. a sand control cartridge assembly; 21. a second shear pin; 22. a third shear pin; 23. a second screw; 24. a third screw; 25. a lower joint; 26. a barrel; 27. a plug; 28. and a fourth shear pin.

Detailed Description

Example 1:

a preset throttle comprises a preset working barrel 1, a delivery tool 2 and a throttle core 3, wherein the throttle core 3 can be anchored in the preset working barrel 1, and the left end of the throttle core 3 can be connected with the delivery tool 2.

Example 2:

as shown in fig. 1-4, the preset throttle comprises a preset working barrel 1, a delivery tool 2 and a throttle core 3, wherein the throttle core 3 can be anchored in the preset working barrel 1, and the left end of the throttle core 3 can be connected with the delivery tool 2. The preset working barrel 1 is firstly put to a prescribed position at the bottom of a well, the delivery tool 2 is mainly used when the choke is put into the well for delivery, the effect of the tool is that the throttling core 3 is delivered into the preset working barrel, so that the throttling core 3 is anchored and sealed with the preset working barrel 1, after the throttling core 3 is anchored and sealed, the gas well yield is regulated through the throttling core 3, and the tool has the advantages that compared with preset chokes with other structures: high success rate of seat sealing, good sealing performance, easy salvage, simple integral structure, and the central pore passage can be dredged.

The delivery tool 2 comprises an upper joint 4, a mandrel 5, a locking ring 7, a clamping block 9, a clamping seat 10 and a lower joint 25, the locking ring 7 and the upper joint 4 are sequentially sleeved outside the left section of the mandrel 5 from inside to outside, the mandrel 5 is positioned on a horizontal shaft of the upper joint 4, the clamping seat 10 is sleeved outside the middle section of the mandrel 5, the left end of the clamping seat 10 is connected with the right end of the upper joint 4, the clamping block 9 is connected to the upper surface of the clamping seat 10, and the right end of the mandrel 5 can be connected with the lower joint. The assembly sequence of each part of the delivery tool 2 is as follows: firstly, sequentially installing a lock ring 7 and a mandrel 5 in an upper joint 4, then placing a clamping block 9 in a clamping seat 10, enabling the clamping seat 10 to penetrate through the mandrel 5 to be in threaded connection with the upper joint 4, and finally connecting a joint 11 with the mandrel 5;

the delivery tool 2 further comprises a connecting piece, the connecting piece comprises a first shear pin 6 and a first screw 8, the first shear pin 6 is respectively connected with the left section of the mandrel 5 and the upper joint 4, and the first screw 8 is respectively connected with the upper joint 4 and the outer sleeve clamping seat 10.

The throttling core 3 comprises a locking block shaft 11, a locking cap 12, a locking block body 13, a locking block 14, a sealing ring 15, a sealing body 16, a gasket 17, an air nozzle seat 18, an air nozzle 19 and a sand prevention cylinder assembly 20, a clamping seat 10 on the delivery tool 2 is connected to the left end of the locking block shaft 11, the locking cap 12, the locking block body 13 and the sealing body 16 are sequentially connected to the right section of the upper portion of the locking block shaft 11 from left to right, the locking block 14 is installed on the locking block body 13, the sealing ring 15 is sleeved on the sealing body 16, the air nozzle seat 18 is connected to the inside of the right end of the locking block shaft 11, the air nozzle 19 is installed on the air nozzle seat 18, the gasket 17 is connected between the air nozzle seat 18 and the air nozzle 19, the gasket 17 is located at the left end of the air nozzle 19, and the sand. The installation sequence of each part of the throttling core 3 is as follows: firstly, a locking block 14 is arranged in a locking block body 13, then the locking block body 13 is arranged in a locking block shaft 11, a locking cap 12 is arranged at the left end of the locking block body 13 and used for fixing the locking block shaft 11 without falling off the locking block body 13, then a sealing ring 15 is arranged on a sealing body 16, the sealing body 16 is connected with the locking block body 13, then an air nozzle seat 18 and an air nozzle 19 are arranged, and finally a sand control cylinder assembly 20 is arranged on the sealing body 16. The sealing ring 15 is used for sealing the throttling core 3 and the preset working barrel 1, along with continuous output of gas, the yield and the pressure gradually decrease, the preset throttling core finishes the mission after the decline reaches a certain degree, the preset throttling core can be salvaged out, if the condition that the preset throttling core cannot be salvaged occurs, parts such as the air nozzle seat 18 and the plug 28 can be sheared and separated from the throttling core by using a steel wire rope, the central hole passage of the throttling core is communicated at the moment to form an air flow channel, the later-stage production of a gas well is not influenced, the cost generated when the tool cannot be salvaged is greatly saved through the operation, the cost is saved, and the economic benefit is improved.

The throttling core 3 further comprises a fastening connecting piece, the fastening connecting piece comprises a second shear pin 21, a third shear pin 22, a second screw 23 and a third screw 24, the second shear pin 21 is respectively connected with a lower joint 25 and a locking block body 13, the second screw 23 is respectively connected with the locking block body 13 and a sealing body 16, the third screw 24 is respectively connected with the sealing body 16 and a sand control cylinder assembly 20, and the third shear pin 22 is respectively connected with the sealing body 16 and an air nozzle seat 18. When the preset type throttle can not be salvaged, the second shear pin 21, the third shear pin 22, the second screw 23 and the third screw 24 can shear parts such as the air nozzle seat 18 and the sand prevention cylinder assembly 20 away from the throttle core by utilizing the operation of the steel wire rope, and at the moment, the central hole passage of the throttle core is communicated to form an air flow channel, so that the later production of a gas well is not influenced, the cost generated when the tool can not be salvaged is greatly saved, the cost is saved, and the economic benefit is improved.

The sand control cylinder assembly 20 comprises a cylinder body 26, a plug 27 and a fourth shear pin 28, wherein the right end of the cylinder body 26 is connected with the plug 27 through the fourth shear pin 28. If the tool cannot be salvaged, the third shear pin 22 and the fourth shear pin 28 can be cut off by using the steel wire rope, so that parts such as the air nozzle seat 18, the cylinder 26 and the plug 27 can be cut off from the throttling core 3, the central hole of the throttling core 3 is communicated at the moment to form an air flow channel, the later-stage production of the gas well is not influenced, the cost generated when the tool cannot be salvaged is greatly saved by the operation, the cost is saved, and the economic benefit is improved.

The sealing ring 15 is a V-shaped sealing ring. The V-shaped sealing ring is selected, so that the sealing ring can be stably placed, the structural stability is improved, the sealing contact area can be increased, and the contact stress is improved.

The V type sealing washer is including fitting with a contraceptive ring, sealing ring and lower ring, and it connects gradually from the left hand right side to fit with a contraceptive ring, sealing ring and lower ring, and the quantity of sealing ring is 4, and 4 sealing rings are connected side by side from the left hand right side. The sealing structure has the advantages that the sealing contact area can be increased, the contact stress is improved, the number of the sealing rings can be increased or reduced according to actual conditions, the structure is simple, and the application range is wide.

The material that upper ring and lower ring adopted is 30Cr13, and the material that the sealing ring adopted is polytetrafluoroethylene. 30Cr13 has excellent corrosion resistance and wear resistance, can bear the pressure of high load, polytetrafluoroethylene is the macromolecular compound that is polymerized by tetrafluoroethylene, has excellent chemical stability, corrosion resistance (is one of the best materials of corrosion resistance in the world today, except molten metal sodium and liquid fluorine, can resist all other chemicals, also does not change when boiling in aqua regia, has electrical insulation and good ageing resistance, and temperature resistant span is big (can work for a long time at the temperature of +250 ℃ to-180 ℃), in conclusion, adopting the above materials can all strengthen the leakproofness of throttle core and prefabricated working barrel, prolong the life, extensively adapt to various environments in the pit, the suitability is strong.

The V-shaped sealing ring is in interference fit with the preset working barrel 1. The sealing strength is improved.

The utility model discloses a theory of operation does:

when the delivery tool 2 delivers the throttling core 3 into the preset working barrel 1, a lower joint 25 at the right end is connected with the inside of a locking block body 13 in the throttling core 3 through a second shear pin 23, after a first shear pin 6 is sheared by downward delivery force, the delivery tool 2 pushes a locking block shaft 11 to move downwards except for a core shaft 5 and the lower joint 25, so that a locking block 14 slides to the outside of the locking block body 13 to be anchored with the preset working barrel 1, a sealing ring 15 of the throttling core 3 reaches a designed position at the moment, the anchoring and sealing work of the throttling core 3 is completely finished, the delivery tool 2 is lifted up to cut off the second shear pin 21 connected with the lower joint 25 and the locking block body 13, the delivery tool is separated from the throttling core 3 to finish a shaft mission, and the aperture of an air nozzle 19 in the throttling core 3 can be adjusted to adjust the yield of a gas well.

In the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "left", "inner", "right", etc., it is based on the orientation or positional relationship shown in the drawings, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

The above examples are merely illustrative of the present invention and do not limit the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention.

Claims

1. A preset throttle is characterized in that: the device comprises a preset working barrel (1), a delivery tool (2) and a throttling core (3), wherein the throttling core (3) can be anchored in the preset working barrel (1), and the left end of the throttling core (3) can be connected with the delivery tool (2); delivery instrument (2) are including top connection (4), dabber (5), catch (7), fixture block (9), cassette (10), lower clutch (25), outside from inside to outside cup joints catch (7) and top connection (4) in proper order in dabber (5) left side section, dabber (5) are located the horizontal axis of top connection (4), the right-hand member of top connection (4) is connected to the left end of dabber (5) middle section overcoat cassette (10) and cassette (10), fixture block (9) are connected to the higher authority of cassette (10), lower clutch (25) can be connected to dabber (5) right-hand member.

2. The preset choke of claim 1, wherein: the delivery tool (2) further comprises a connecting piece, the connecting piece comprises a first shear pin (6) and a first screw (8), the first shear pin (6) is respectively connected with the left section of the mandrel (5) and the upper joint (4), and the first screw (8) is respectively connected with the upper joint (4) and the outer sleeve clamping seat (10).

3. The preset choke of claim 2, wherein: the throttling core (3) comprises a locking block shaft (11), a locking cap (12), a locking block body (13), a locking block (14), a sealing ring (15), a sealing body (16), a gasket (17), an air nozzle seat (18), an air nozzle (19) and a sand control cylinder assembly (20), the left end of locking piece axle (11) is connected cassette (10) on delivering instrument (2), the upper portion right side section of locking piece axle (11) connects gradually locking cap (12) from left hand right side, locking piece body (13) and seal (16), locking piece (14) are installed to the higher authority of locking piece body (13), sealing washer (15) are cup jointed to the higher authority of seal (16), right-hand member internal connection air nozzle seat (18) of locking piece axle (11), install air cock (19) on air nozzle seat (18), connecting washer (17) and packing washer (17) are located air nozzle (19) left end between air nozzle seat (18) and air cock (19), the right-hand member external connection sand control section of thick bamboo assembly (20) of locking piece axle (11).

4. The preset choke of claim 3, wherein: the throttling core (3) further comprises a fastening connecting piece, the fastening connecting piece comprises a second shear pin (21), a third shear pin (22), a second screw (23) and a third screw (24), the second shear pin (21) is respectively connected with a lower connector (25) and a locking block body (13), the second screw (23) is respectively connected with the locking block body (13) and a sealing body (16), the third screw (24) is respectively connected with the sealing body (16) and a sand control cylinder assembly (20), and the third shear pin (22) is respectively connected with the sealing body (16) and a gas nozzle seat (18).

5. The preset choke of claim 4, wherein: the sand control cylinder assembly (20) comprises a cylinder body (26), a plug (27) and a fourth shear pin (28), wherein the right end of the cylinder body (26) is connected with the plug (27) through the fourth shear pin (28).

6. The preset choke of claim 5, wherein: the sealing ring (15) is a V-shaped sealing ring.

7. The preset choke of claim 6, wherein: the V type sealing washer is including fitting with a contraceptive ring, sealing ring and lower ring, and it connects gradually from the left hand right side to fit with a contraceptive ring, sealing ring and lower ring, and the quantity of sealing ring is 4, and 4 sealing rings are connected side by side from the left hand right side.

8. The preset choke of claim 7, wherein: the material that upper ring and lower ring adopted is 30Cr13, and the material that the sealing ring adopted is polytetrafluoroethylene.

9. The preset choke of claim 8, wherein: the V-shaped sealing ring is in interference fit with the preset working barrel (1).