CN205135577U - Coiled tubing is gas injection instrument for gas lift - Google Patents

Coiled tubing is gas injection instrument for gas lift Download PDF

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Publication number
CN205135577U
CN205135577U CN201520994729.5U CN201520994729U CN205135577U CN 205135577 U CN205135577 U CN 205135577U CN 201520994729 U CN201520994729 U CN 201520994729U CN 205135577 U CN205135577 U CN 205135577U
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CN
China
Prior art keywords
valve seat
coiled tubing
gas
threaded
central tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201520994729.5U
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Chinese (zh)
Inventor
刘少胡
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Yangtze University
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Yangtze University
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Publication date
Application filed by Yangtze University filed Critical Yangtze University
Priority to CN201520994729.5U priority Critical patent/CN205135577U/en
Application granted granted Critical
Publication of CN205135577U publication Critical patent/CN205135577U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a coiled tubing is gas injection instrument for gas lift belongs to oil gas exploitation downhole tool technical field. This injection instrument includes top connection, lower clutch, center tube, disk seat, seal cover and positioning core axle, being provided with the disk seat in the center tube, being equipped with the bolt -lock through the seal cover in the disk seat and buckleing, the bolt -lock is buckled the threaded one end and is installed locator sub, is equipped with the positioning core axle through the position sleeve on the disk seat of locator sub one side, this injection instrument is not being mentioned under the condition of producing oil pipe, just can carry out again atmospheric pressure to old well and lift the operation, improves the oil production to can be according to on -the -spot oil well needs, nimble change with extracting tool in the gas lift valve, reduction disposition of equipment cycle and cost, this instrument possesses auto -lock protect function, can prevent to inject into gaseous back pressure phenomenon, instrument and terrestrial system under the protective well. The utility model discloses simple structure, convenient operation, work safe and reliable can effectively accomplish atmospheric pressure and lift the operation, and the specially adapted is new, the atmospheric pressure of old oil well lifts the operation and uses.

Description

A kind of coiled tubing gaslift gas inject instrument
Technical field
The utility model relates to a kind of coiled tubing gaslift gas inject instrument, belongs to oil-gas mining downhole tool technical field.
Background technology
In oil-gas mining process, usually adopt the method for air pressure lifting to carry out oil producing operation to oil well, this is one of oil production method that in oil recovery process, economic benefit is best.Gaslift process is by the restriction of well depth, and injecting gas is deep in liquid by gas lift valve, liquid weight above bottom production tube is lightened, and reduces the back pressure to oil reservoir, thus ensures that oil well can continuous seepage smoothly.At present, in the well workover process of OW, usually needing production tube to be lifted to completely ground could install gas lift system smoothly, to carry out air pressure lifting oil producing operation, this process is time-consuming, effort, considerably increases labour intensity and cost, affects the production cycle.
In order to obtain best oil recovery benefit, for different OWs, need in current gas lift system to be equipped with different gas lift valves, but this gas lift valve does not possess self-lock protection function, can not well prevent gas back pressure phenomenon.For this reason, at present in the urgent need to development and application a kind of based on coiled tubing, can dismantle flexibly and change, there is feedback auto-lock function, and institute take up space little, simple to operate, be convenient to mobile and transport, just can complete the gas inject instrument to down-hole liquid air pressure lifting operation in horizontal well, extended reach well and straight well smoothly when not mentioning production tube.
Summary of the invention
The purpose of this utility model is: provide a kind of and effectively can solve existing gas lift valve and can not dismantle flexibly, change and the difficult problem that in the underground work caused, gaslift work can not be carried out smoothly, for expanding the use of coiled tubing gas lift system in oil wells in field, accelerate rate of oil production, strengthen oil well output capacity, prevent the coiled tubing gaslift gas inject instrument of the accident such as gas and liquid backflow.
The technical solution of the utility model is:
A kind of coiled tubing gaslift gas inject instrument, comprises top connection, lower contact, central tube, valve seat, sealing shroud and positioning core axle; It is characterized in that: the threaded one end of central tube is provided with top connection, the other end screw thread of central tube is provided with lower contact, is provided with valve seat in central tube, and one end of valve seat is threaded with lower contact; By sealing shroud, bolt-lock is housed in valve seat to buckle, bolt-lock is buckled threaded one end and is provided with landing nipple, and the valve seat of landing nipple side is equipped with positioning core axle by positioning sleeve; Bolt-lock is buckled other end screw thread and is provided with upper shell, and upper shell is built with gas lift valve; By sealing shroud, middle casing is housed in the valve seat of upper shell side, middle casing is built with center, and center contacts with gas lift valve and connects; The valve seat of middle casing side is built with lower house, and lower house is threaded with middle casing; Lower house internal thread is provided with conical head, pressure port is provided with in conical head, core is had to block head by spring fitting in pressure port, described core obstruction head is provided with pressure regulating cavity, the core obstruction head of pressure regulating cavity side is provided with pressure and regulates runner, pressure regulates runner to be communicated with the pressure port of conical head by pressure regulating cavity.
Centre bore one end inwall of described central tube arranges inner convex platform.
Described valve seat is tube, valve seat one end be circumferentially provided with outer lug boss; Annular space chamber is provided with between central tube and valve seat.
Be provided with pin between described positioning sleeve and positioning core axle, one end of positioning core axle is threaded with landing nipple.
Sealing ring is provided with between described landing nipple and valve seat.
Described middle casing is threaded with upper shell.
Described valve seat, upper shell and gas lift valve are provided with key shape hole in corresponding shape.
The beneficial effects of the utility model are:
Coiled tubing gaslift gas inject tool construction is simple, long service life, security performance are high, and volume is little, is convenient to mobile and transport, can completes underground work with greater efficiency; Be connected with coiled tubing and use, can be widely used in the oil gas lifting of horizontal well, extended reach well and straight well, have good economic benefit, possess good self-lock protection performance, operating efficiency is high.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the A place structure for amplifying schematic diagram of Fig. 1;
Fig. 3 is the B place structure for amplifying schematic diagram of Fig. 1.
In figure: 1, top connection, 2, lower contact, 3, central tube, 4, valve seat, 5, sealing shroud, 6, positioning core axle, 7, annular space chamber, 8, bolt-lock buckles, 9, landing nipple, 10, positioning sleeve, 11, pin, 12, upper shell, 13, gas lift valve, 14, key shape hole, 15, middle casing, 16, center, 17, lower house, 18, conical head, 19, pressure port, 20, spring, 21, core blocks head, and 22, pressure regulating cavity, 23, pressure regulates runner.
Detailed description of the invention
This coiled tubing gaslift gas inject instrument comprises top connection 1, lower contact 2, central tube 3, valve seat 4, sealing shroud 5 and positioning core axle 6.The threaded one end of central tube 3 is provided with top connection 1, and the other end screw thread of central tube 3 is provided with lower contact 2, and centre bore one end inwall of central tube 3 arranges inner convex platform.Valve seat 4 is provided with in the centre bore of central tube 3.Valve seat 4 is tube, valve seat 4 one end be circumferentially provided with outer lug boss; Be provided with annular space chamber 7 between the inner convex platform of central tube 3 and the outer lug boss of valve seat 4, one end of valve seat 4 is threaded with lower contact 2.
By sealing shroud 5, bolt-lock is housed in valve seat 4 and buckles 8, bolt-lock is buckled 8 threaded one ends and is provided with landing nipple 9, and the valve seat 4 of landing nipple 9 side is equipped with positioning core axle 6 by positioning sleeve 10.Be provided with pin 11 between positioning sleeve 10 and positioning core axle 6, one end of positioning core axle 6 is threaded with landing nipple 9; Sealing ring is provided with between landing nipple 9 and valve seat 4.
Bolt-lock is buckled 8 other end screw threads and is provided with upper shell 12, and upper shell 12 is built with gas lift valve 13; Valve seat 4, upper shell 12 and gas lift valve 13 are provided with key shape hole 14, for the flowing of injecting gas in corresponding shape.
By sealing shroud 5, middle casing 15 is housed in the valve seat 4 of upper shell 12 side, middle casing 15 is threaded with upper shell 12.Middle casing 15 is built with center 16, and center 16 contacts with gas lift valve 13 and connects; The valve seat 4 of middle casing 15 side is built with lower house 17, and lower house 17 is threaded with middle casing 15.
Lower house 17 internal thread is provided with conical head 18, is provided with pressure port 19 in conical head 18, is provided with core blocks 21 in pressure port 19 by spring 20.Core blocks on 21 and is provided with pressure regulating cavity 22, and the core of pressure regulating cavity 22 side blocks and is provided with pressure on 21 and regulates runner 23, and pressure regulates runner 23 to be communicated with the pressure port 19 of conical head 18 by pressure regulating cavity 22.Lower house 17 is hollow sections that internal diameter has type conical bench hole, and it is that sphere can fit tightly with the cone step hole of lower house 17 that core blocks 21 left end, thus prevents gas or liquid backflow, and pressure regulates in runner 23 and is provided with one way valve.
Gas lift valve 13, but can according to on-the-spot actual needs by be axially arranged in valve seat 4 and can not circumferentially to rotate between the two, dismounting and change gas lift valve 13,
When this coiled tubing gaslift is with gas inject tool work, be connected with ground control system by coiled tubing, the two ends of this implantation tool are all connected with coiled tubing, ground control system by coiled tubing by gas inject down-hole, the gas injected flow into central tube 3 via the top connection 1 be connected with coiled tubing, combine via central tube 3 and valve seat 4 again and the gas flow that formed flow into annular space chamber 7, gas lift valve 13 is entered afterwards through key shape hole 14, when in gas lift valve 13, the pressure of gas is greater than the pressure in production tube, core blocks 21 Compress Spring 20 and moves to conical head 18 direction, gas enters in the cavity of lower contact 2, and then regulate the one way valve in runner 23 to flow in conical head 18 by pressure, gas is injected into shaft bottom from pressure port 19 afterwards, when the gas concentration injected and density are greater than the fluid pressure in shaft bottom, and gas flow abundant time, fluid weight in production tube lightens, under the influence of air pressure, downhole fluid rises to ground from the annular space of coiled tubing and production tube, thus complete oil producing operation.Otherwise; when downhole fluid pressure is excessive; under the effect of pressure and spring 20 restoring force; core blocks 21 and moves to the rightabout of conical head 18; the sphere that core blocks 21 is close to the cone step hole in lower house 17; thus prevent the fluid backflow of gas and the production tube injected, ensure that gaslift operation is stable smoothly and carry out, and play the effect of available protecting downhole tool and ground control system.This coiled tubing gaslift gas inject instrument also can with the reverse gas lift system of coiled tubing with the use of, operating principle is consistent with foregoing.
This implantation tool is not when mentioning production tube; just can carry out air pressure lifting operation again to old well; improve oil production; and can according to on-the-spot oil well needs; gas lift valve 13 in flexible replacing and demounting tool, reduce life of equipment and cost, this instrument possesses self-lock protection function; injecting gas back pressure phenomenon can be prevented, protection downhole tool and ground system.The utility model structure is simple, easy to operate, safe and reliable, effectively can complete air pressure lifting operation, is specially adapted to air pressure lifting operation that is new, OW and uses.

Claims (7)

1. a coiled tubing gaslift gas inject instrument, comprises top connection (1), lower contact (2), central tube (3), valve seat (4), sealing shroud (5) and positioning core axle (6); It is characterized in that: the threaded one end of central tube (3) is provided with top connection (1), the other end screw thread of central tube (3) is provided with lower contact (2), be provided with valve seat (4) in central tube (3), one end of valve seat (4) is threaded with lower contact (2); By sealing shroud (5), bolt-lock is housed in valve seat (4) to buckle (8), bolt-lock is buckled (8), and threaded one end is provided with landing nipple (9), and the valve seat (4) of landing nipple (9) side is equipped with positioning core axle (6) by positioning sleeve (10); Bolt-lock is buckled (8), and other end screw thread is provided with upper shell (12), and upper shell (12) is built with gas lift valve (13); By sealing shroud (5), middle casing (15) is housed in the valve seat (4) of upper shell (12) side, middle casing (15) is built with center (16), and center (16) contacts with gas lift valve (13) and connects; The valve seat (4) of middle casing (15) side is built with lower house (17), and lower house (17) is threaded with middle casing (15); Lower house (17) internal thread is provided with conical head (18), pressure port (19) is provided with in conical head (18), by spring (20), core is installed in pressure port (19) and blocks head (21), described core obstruction head (21) is provided with pressure regulating cavity (22), core obstruction head (21) of pressure regulating cavity (22) side is provided with pressure and regulates runner (23), pressure regulates runner (23) to be communicated with the pressure port (19) of conical head (18) by pressure regulating cavity (22).
2. a kind of coiled tubing gaslift gas inject instrument according to claim 1, is characterized in that: centre bore one end inwall of described central tube (3) arranges inner convex platform.
3. a kind of coiled tubing gaslift gas inject instrument according to claim 1, is characterized in that: described valve seat (4) is tube, valve seat one end be circumferentially provided with outer lug boss; Annular space chamber (7) is provided with between central tube (3) and valve seat (4).
4. a kind of coiled tubing gaslift gas inject instrument according to claim 1, it is characterized in that: be provided with pin (11) between described positioning sleeve (10) and positioning core axle (6), one end of positioning core axle (6) is threaded with landing nipple (9).
5. a kind of coiled tubing gaslift gas inject instrument according to claim 1, is characterized in that: be provided with sealing ring between described landing nipple (9) and valve seat (4).
6. a kind of coiled tubing gaslift gas inject instrument according to claim 1, is characterized in that: described middle casing (15) is threaded with upper shell (12).
7. a kind of coiled tubing gaslift gas inject instrument according to claim 1, is characterized in that: described valve seat (4), upper shell (12) and gas lift valve (13) are upper is provided with key shape hole (14) in corresponding shape.
CN201520994729.5U 2015-12-06 2015-12-06 Coiled tubing is gas injection instrument for gas lift Expired - Fee Related CN205135577U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520994729.5U CN205135577U (en) 2015-12-06 2015-12-06 Coiled tubing is gas injection instrument for gas lift

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520994729.5U CN205135577U (en) 2015-12-06 2015-12-06 Coiled tubing is gas injection instrument for gas lift

Publications (1)

Publication Number Publication Date
CN205135577U true CN205135577U (en) 2016-04-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520994729.5U Expired - Fee Related CN205135577U (en) 2015-12-06 2015-12-06 Coiled tubing is gas injection instrument for gas lift

Country Status (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105350944A (en) * 2015-12-06 2016-02-24 长江大学 Gas injection tool for continuous oil tube gas jack
CN107630684A (en) * 2017-08-30 2018-01-26 中国石油大学(北京) Coiled tubing gaslift water pumping gas production dynamic process analogy method and device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105350944A (en) * 2015-12-06 2016-02-24 长江大学 Gas injection tool for continuous oil tube gas jack
CN107630684A (en) * 2017-08-30 2018-01-26 中国石油大学(北京) Coiled tubing gaslift water pumping gas production dynamic process analogy method and device
CN107630684B (en) * 2017-08-30 2019-07-12 中国石油大学(北京) Coiled tubing gaslift water pumping gas production dynamic process analogy method and device

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160406

Termination date: 20171206