CN104499997B - A kind of plunger lift down-hole buffering mechanism - Google Patents
A kind of plunger lift down-hole buffering mechanism Download PDFInfo
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- CN104499997B CN104499997B CN201410770149.8A CN201410770149A CN104499997B CN 104499997 B CN104499997 B CN 104499997B CN 201410770149 A CN201410770149 A CN 201410770149A CN 104499997 B CN104499997 B CN 104499997B
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- cylinder
- core cylinder
- valve seat
- buffering mechanism
- adapter sleeve
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
Abstract
The invention provides a kind of plunger lift down-hole buffering mechanism, a kind of plunger lift down-hole buffering mechanism, including fishing head, the first adapter sleeve, upper core cylinder, the second adapter sleeve, body, linkage section, spring, lower core cylinder, valve, valve seat；Fishing head is connected with the first adapter sleeve by buffer shaft, the buffering outer shaft sleeve is provided with buffer spring, the spring that the lower perpendicular end of core cylinder is arranged is inserted in described linkage section together, linkage section is fixed on the lower end of body, valve seat is fixedly connected with the lower end of lower core cylinder, valve is located in valve seat chamber, and valve seat top is arranged with sealing ring, and the sealing ring is located between valve seat and linkage section；Body is provided with the closing piece groove communicated with its inner chamber, and closing piece is provided with the closing piece groove.The inventive structure is simple, and device stability is strong, and the hydrops in the pit shaft of top can be made to keep constant, improves discharge opeing, and gas production efficiency lifts liquid thorough.
Description
Technical field
Invention is related to oil gas field plunger lift water pumping gas production field, more particularly to a kind of plunger lift down-hole buffering mechanism.
Background technology
With continually developing for Soviet Union's Sulige gas field, a large amount of gas wells have been enter into low pressure, low yield stage, and well yield is low, take liquid
Ability, shaft bottom and pit shaft progressively produce hydrops, have a strong impact on gas well yield.Plunger lift is having for current gas field row both at home and abroad
Imitate and economic and practical water pumping gas production method, the down-hole buffering mechanism of certain position in pit shaft is arranged in plunger gas lift equipment system
Restriction plunger position, seal shaft, unidirectional stream, the effect of damping plunger excessively are served in plunger lift water pumping gas production,
So the structure design of down-hole buffering mechanism plays key effect in plunger lift package unit.
The content of the invention
It is an object of the invention to provide a kind of simple structure, device stability is strong, can protect the hydrops in the pit shaft of top
Hold constant, improve discharge opeing, gas production efficiency lifts liquid thoroughly plunger lift down-hole buffering mechanism.
To achieve the above object, the present invention uses following technical scheme, a kind of plunger lift down-hole buffering mechanism, including beats
Drag for head, the first adapter sleeve, upper core cylinder, the second adapter sleeve, body, linkage section, spring, lower core cylinder, valve, valve seat；
Described fishing head is connected with the first adapter sleeve by buffer shaft, and the buffering outer shaft sleeve is provided with buffer spring, described
Upper core cylinder is fixed on the first adapter sleeve lower end, and described the second adapter sleeve, body are sequentially sleeved on core cylinder, described body
It is fixed on the lower end of the second adapter sleeve；
Described lower core cylinder is T-shaped cylinder, and the spring that the described perpendicular end of lower core cylinder is arranged is inserted in described together
Spring in linkage section and described is located between the horizontal segment of the raised and lower core cylinder that linkage section medial surface is provided with；
Described linkage section is fixed on the lower end of body, and described valve seat is fixed with the lower end of described lower core cylinder and connected
Connect, described valve is located in valve seat chamber, the valve seat top is arranged with sealing ring, and the sealing ring be located at valve seat and
Between linkage section；
The step that described upper core cylinder is made up of the top cylinder of concentric different radii, middle part cylinder and bottom cylinder
Shape cylinder, and top cylinder radius of the radius more than middle part cylinder, the radius of middle part cylinder more than bottom cylinder radius, institute
The external diameter of the bottom cylinder stated is identical with the internal diameter size of lower core cylinder, and bottom cylinder outer surface connects with the internal diameter of lower core cylinder
Touch；
Described body is provided with the closing piece groove communicated with its inner chamber, and closing piece is provided with the closing piece groove.
The inner edge of face and the second adapter sleeve outside baffle ring, and the baffle ring is additionally provided between described body and the second adapter sleeve
Face is contacted, and described body is fixed in the second adapter sleeve by screw thread.
Being shaped as described valve seat is up-small and down-big step-like, and the upper end of described valve seat is inserted into the connection
In section, described sealing ring is located between linkage section and the step of valve seat.
The bottom cylinder of described upper core cylinder is provided with telescopic claw, and described lower core cylinder medial surface is provided with telescopic chute, described
Telescopic claw passed in and out in telescopic chute.
The upper end of described upper core cylinder is extend into the second adapter sleeve, and is fixedly connected with the second adapter sleeve by screw thread.
The lower end of described lower core cylinder is deep into valve seat, and is fixedly connected with valve seat by screw thread.
The present invention uses above-mentioned technical proposal, with advantages below：1st, closing piece is set in advance in pit shaft in can be snapped in well
In draw-in groove in, device stability is strong；
2nd, external diameter and device body external diameter are small during sealing ring is gone into the well, and after working as the device setting success of positioning, sealing ring
Compressed expansion and pit shaft sealing, achievable device process resistance of going into the well are small；
3rd, there is valve to the unidirectional valve action of gas-liquid flow in well in device, so can completely by device during plunger lift act liquid
Above liquid is enumerated, and lifts liquid thorough.
Brief description of the drawings
Fig. 1 is a kind of structural representation of plunger lift down-hole buffering mechanism.
In figure：1st, fishing head；2nd, buffer spring；3rd, buffer shaft；4th, the first adapter sleeve；5th, upper core cylinder；6th, the second adapter sleeve；7、
Baffle ring；8th, closing piece；9th, body；10th, linkage section；11st, spring；12nd, lower core cylinder；13rd, sealing ring；14th, valve；15th, valve seat.
Specific embodiment
Further a kind of plunger lift down-hole buffering mechanism is described in detail below according to embodiment.
Embodiment 1
A kind of plunger lift down-hole buffering mechanism as shown in Figure 1, including fishing head 1, the first adapter sleeve 4, upper core cylinder 5, the
Two adapter sleeves 6, body 9, linkage section 10, spring 11, lower core cylinder 12, valve 14, valve seat 15；
Described fishing head 1 is connected with the first adapter sleeve 4 by buffer shaft 3, and buffer spring 2 is arranged with outside the buffer shaft 3,
In work, when plunger lift down-hole buffering mechanism is thrown to specified location, because body 9 cannot be descending, it is necessary to the device
Jarring is carried out, during downward jarring, buffer spring 2 primarily serves the effect of buffering, prevented during jarring to dress
Put and cause to damage；Described upper core cylinder 5 is fixed on the lower end of the first adapter sleeve 4, and described the second adapter sleeve 6, body 9 are arranged successively
On upper core cylinder 5, described body 9 is fixed on the lower end of the second adapter sleeve 6；
Described lower core cylinder 12 is T-shaped cylinder, and the spring 11 that described 12 perpendicular ends of lower core cylinder are arranged is inserted in together
Spring 11 in described linkage section 10 and described is located at the horizontal segment of the raised and lower core cylinder 12 that the medial surface of linkage section 10 is provided with
Between；I.e. spring 11 is set in the lower end of 12 steps of lower core cylinder, and the projection being provided with positioned at step and the medial surface of linkage section 10
Between, prevent spring 11 from sliding, the projection that lower core 12 steps of cylinder and the medial surface of linkage section 10 are provided with is main to play spacing work to spring
With；
Described linkage section 10 is fixed on the lower end of body 9, the lower end of described valve seat 15 and described lower core cylinder 12
It is fixedly connected, described valve 14 is located in the chamber of valve seat 15, and the top of the valve seat 15 is arranged with sealing ring 13, and the sealing
Circle 13 is located between valve seat 15 and linkage section 10；The valve 14 that the valve seat 15 and the inner chamber of valve seat 15 being provided with are provided with mainly rises
To the effect of check valve, when valve 14 departs from valve seat 15, passage is opened, and fluid can enter into device by valve seat 15
In core pipe in, in valve 14 falls back to valve seat 15, the closed check valve of formation, fluid can not enter core pipe in, sealing
Under the extruding of linkage section 10 and valve seat 15 ,=sealing ring 13 realizes expansion to circle 13, is realized with pit shaft setting.
The platform that described upper core cylinder 5 is made up of the top cylinder of concentric different radii, middle part cylinder and bottom cylinder
Scalariform cylinder, and top cylinder radius of the radius more than middle part cylinder, the radius of middle part cylinder more than bottom cylinder radius,
The internal diameter size of the external diameter of described bottom cylinder and lower core cylinder 12 is identical, and bottom cylinder outer surface and lower core cylinder 12 internal diameter
It is in contact；During jarring, upper core pipe 5 is moved downward, because of bottom outside diameter of cylinder and the lower core pipe 12 of the bottom of upper core pipe 5
Internal diameter is identical, and in jarring, bottom cylinder is entered into lower core pipe 12, and core pipe 5 is turned on lower core pipe 12 in realization；
Described body 9 is provided with the closing piece groove 16 communicated with its inner chamber, closing piece 8 is provided with the closing piece groove 16, in jarring
During, upper core pipe 5 is moved down, and closing piece 8 is moved relative in upper core pipe 5, when closing piece 8 reaches the middle and upper part cylinder of upper core pipe 5 with
The step that portion's cylinder is formed is to be blocked by the step, and upper core pipe 5 will stop moving down, and prevent core pipe 5 from moving down always.
The present embodiment is carried out according to the following course of work：
（1）Deliver down-hole buffering mechanism：
The present invention completes launch process by steel wire operation.It is connected with fishing head 1 with pulling and running tool before delivering.Used during dispensing
Steel wire tool string connects pulling and running tool and the seating nipple delivered to specified location, due to the presence of the limited step of body 9, causes
Instrument cannot be descending, downward jarring tool string.Upper core cylinder 5 is moved down relative to body 9, due on upper core cylinder 5 top cylinder with
The effect of the step that portion's cylinder is formed, closing piece 8 is blocked in the lower section of the step, and upper core cylinder 5 will not continue to move down；It is same with this
When, because the bottom cylinder of upper core cylinder 5 is stretched into lower core cylinder 12 in footpath in the presence of axial force；Due to the release of spring 11, cause
Make lower core cylinder 12 close with seating nipple sealing surface relative to simultaneously compresses seal 13 is moved on linkage section 10 with sealing ring 13, valve seat 15
Envelope.When upper core cylinder 5 is adequately inserted body 9, pulling and running tool pin is cut and is disengaged with fishing head 1, completes to deliver.Due to upper core cylinder
5 stretch into lower core cylinder 12, are turned on lower core cylinder 12, and institute above core cylinder 5 will not the upper shifting with air-flow in opening well and making production.
（2）Down-hole buffering mechanism works
When device upstream and downstream has pressure difference, valve 14 departs from valve seat 15, and downhole fluid is by valve seat 15, lower core cylinder
12 center cavities and the upper core cylinder 5, runner of body 9 move to down-hole buffering mechanism top.Due to sealing ring 13 and shaft in wall
Seal and fluid is not moved downward by pit shaft.When above not existing pressure difference under down-hole buffering mechanism, valve 14 drops back into all
Fluid is set not moved downward through the center cavity of valve seat 15 on your seat 15.When plunger is fallen on down-hole buffering mechanism, fishing head 1
And buffer shaft 3 is moved down relative to upper core cylinder 5, and jarring of the plunger to down-hole buffering mechanism is reduced due to the presence of buffer spring 2
Effect.Before plunger is up, down-hole buffering mechanism has supporting role always to plunger.
（3）Salvage down-hole buffering mechanism
The present invention completes to salvage by steel wire operation.Piano wire connection pulling and running tool is lowered into down-hole buffering mechanism position
Put, above carried after pulling and running tool is docked with fishing head 1, now go up core cylinder 5 and moved relative on body 9, closing piece 8 returns to core cylinder 5
Bottleneck, external diameter is less than seating nipple internal diameter at closing piece 8, and body 9 is salvaged successfully with being moved on upper core cylinder 5.
Embodiment 2
On the basis of embodiment 1, it is additionally provided with outside baffle ring 7, and the baffle ring 7 between the described adapter sleeve 6 of body 9 and second
Side face is contacted with the inner edge face of the second adapter sleeve 6, and described body 9 is fixed in the second adapter sleeve 6 by screw thread, is salvaging well
During lower buffer unit, piano wire connection pulling and running tool is lowered into down-hole buffering mechanism position, when pulling and running tool and fishing head 1 pair
Above carried after connecing, now go up core cylinder 5 and moved relative on body 9, closing piece 8 returns to core 5 bottlenecks of cylinder, and external diameter is less than work at closing piece 8
Make cylinder internal diameter, body 9 is salvaged successfully with being moved on upper core cylinder 5.Due to the effect of baffle ring 7, body 9 will not be with upper core cylinder 5 when above carrying
Separate.
Embodiment 3
On the basis of embodiment 1, described valve seat 15 is shaped as up-small and down-big step-like, described valve seat
15 upper end is inserted into the linkage section 10, and described sealing ring 13 is located at linkage section 10 and valve seat 15）Between step,
During dispensing down-hole buffering mechanism；It is connected with fishing head 1 with pulling and running tool before delivering.Connected with steel wire tool string during dispensing and thrown
Fishing combined tool and the seating nipple delivered to specified location, due to the presence of the limited step of body 9, cause instrument descending, to
Lower jarring tool string.Upper core cylinder 5 is moved down relative to body 9, due to the step that top cylinder on upper core cylinder 5 is formed with middle part cylinder
Effect, closing piece 8 is blocked in the lower section of the step, and upper core cylinder 5 will not continue to move down；At the same time, due under upper core cylinder 5
Portion's cylinder is stretched into lower core cylinder 12 in footpath in the presence of axial force；Due to the release of spring 11, spring 11 promote lower core pipe 12 to
Upper motion, lower core pipe 12 drives valve seat 15 to move upwards, and the valve seat 15 is formed to sealing ring 13 with linkage section 10 and extruded, pressure
Contracting sealing ring 13, the longitudinal dilatation of sealing ring 13 is sealed with seating nipple sealing surface.When upper core cylinder 5 is adequately inserted body 9, throw
Fishing combined tool pin is cut and is disengaged with fishing head 1, completes to deliver.Because upper core cylinder 5 is stretched into lower core cylinder 12, led with lower core cylinder 12
Logical, institute above core cylinder 5 will not the upper shifting with air-flow in opening well and making production.
Embodiment 4
On the basis of embodiment 3, the bottom cylinder of described upper core cylinder 5 is provided with telescopic claw, in described lower core cylinder 12
Side is provided with telescopic chute, and described telescopic claw is passed in and out in telescopic chute, during down-hole buffering mechanism is delivered；Before dispensing
It is connected with fishing head 1 with pulling and running tool.During dispensing pulling and running tool and the work delivered to specified location are connected with steel wire tool string
Cylinder, due to the presence of the limited step of body 9, causes instrument descending, downward jarring tool string.Upper core cylinder 5 is relative to this
Body 9 is moved down, and due to the effect of the step that top cylinder on upper core cylinder 5 is formed with middle part cylinder, closing piece 8 is blocked under the step
Side, upper core cylinder 5 will not continue to move down；At the same time, because the telescopic claw of upper core 5 bottom cylinders of cylinder is in the presence of axial force
Radial contraction is simultaneously stretched into the telescopic claw groove of 12 ends of lower core cylinder；Due to the release of spring 11, spring 11 promote lower core pipe 12 to
Upper motion, lower core pipe 12 drives valve seat 15 to move upwards, and the valve seat 15 is formed to sealing ring 13 with linkage section 10 and extruded, pressure
Contracting sealing ring 13, the longitudinal dilatation of sealing ring 13 is sealed with seating nipple sealing surface.When upper core cylinder 5 is adequately inserted body 9, throw
Fishing combined tool pin is cut and is disengaged with fishing head 1, completes to deliver.Because the telescopic claw of the bottom cylinder of upper core cylinder 5 stretches into lower core cylinder
In telescopic claw groove in 12, institute above core cylinder 5 will not the upper shifting with air-flow in opening well and making production.
Embodiment 5
In any embodiment in above-described embodiment 1-4, in order that each part connection is more shown in firm, and easily tear open
Unload, the upper end of described upper core cylinder 5 is extend into the second adapter sleeve 4, and is fixedly connected with the second adapter sleeve 4 by screw thread；Institute
The lower end of the lower core cylinder 12 stated is deep into valve seat 15, and is fixedly connected with valve seat 15 by screw thread.
It is exemplified as above be only to of the invention for example, do not constitute the limitation to protection scope of the present invention, it is all
It is that design same or analogous with the present invention is belonged within protection scope of the present invention.
Claims (6)
1. a kind of plunger lift down-hole buffering mechanism, it is characterised in that including fishing head（1）, the first adapter sleeve（4）, upper core cylinder
（5）, the second adapter sleeve（6）, body（9）, linkage section（10）, spring（11）, lower core cylinder（12）, valve（14）, valve seat（15）；
Described fishing head（1）With the first adapter sleeve（4）By buffer shaft（3）Connection, the buffer shaft（3）It is arranged with buffer spring outward
（2）, described upper core cylinder（5）It is fixed on the first adapter sleeve（4）Lower end, the second described adapter sleeve（6）, body（9）Cover successively
It is located at core cylinder（5）On, described body（9）It is fixed on the second adapter sleeve（6）Lower end；
Described lower core cylinder（12）It is T-shaped cylinder, described lower core cylinder（12）The spring that perpendicular end is arranged（11）Insert together
In described linkage section（10）In, and described spring（11）Positioned at linkage section（10）The raised and lower core cylinder that medial surface is provided with
（12）Horizontal segment between；
Described linkage section（10）It is fixed on body（9）Lower end, described valve seat（15）With described lower core cylinder（12）'s
Lower end is fixedly connected, described valve（14）Positioned at valve seat（15）In chamber, the valve seat（15）Top is arranged with sealing ring
（13）, and the sealing ring（13）Positioned at valve seat（15）And linkage section（10）Between；
Described upper core cylinder（5）The step being made up of the top cylinder of concentric different radii, middle part cylinder and bottom cylinder
Shape cylinder, and top cylinder radius of the radius more than middle part cylinder, the radius of middle part cylinder more than bottom cylinder radius, institute
The external diameter of the bottom cylinder stated and lower core cylinder（12）Internal diameter size it is identical, and bottom cylinder outer surface and lower core cylinder（12）It is interior
Footpath is in contact；
Described body（9）It is provided with the closing piece groove communicated with its inner chamber（16）, the closing piece groove（16）Inside it is provided with closing piece（8）；
The course of work of the plunger lift down-hole buffering mechanism：
（1）With steel wire tool string pulling and running tool is connected during dispensing and deliver the seating nipple for arriving specified location, it is spacing due to body
The presence of step, causes instrument descending, downward jarring tool string；Upper core cylinder is moved down relative to body, due on upper core cylinder
The effect of the step that top cylinder is formed with middle part cylinder, closing piece is blocked in the lower section of the step, under upper core cylinder will not continue
Move；At the same time, because the bottom cylinder of upper core cylinder is stretched into lower core cylinder in footpath in the presence of axial force；Due to releasing for spring
Put, cause lower core cylinder with sealing ring, valve seat relative to shifting on linkage section and compresses seal and the sealing of seating nipple sealing surface；When
When upper core cylinder is adequately inserted body, pulling and running tool pin is cut and is disengaged with fishing head, completes to deliver；Because upper core cylinder stretches into lower core
In cylinder, turned on lower core cylinder, institute's above core cylinder will not the upper shifting with air-flow in opening well and making production；
（2）When plunger lift down-hole buffering mechanism upstream and downstream has pressure difference, valve departs from valve seat, and downhole fluid passes through valve
Seat, lower core cylinder center cavity and upper core cylinder, the runner of body move to down-hole buffering mechanism top；Due to sealing ring and shaft in wall
Sealing and fluid is not moved downward by pit shaft；When above not existing pressure difference under down-hole buffering mechanism, valve drops back into all
Fluid is set not moved downward through valve seat center cavity on your seat；
When plunger is fallen on the plunger lift down-hole buffering mechanism of underground, fishing head and buffer shaft are moved down relative to upper core cylinder, by
Jarring action of the plunger to plunger lift down-hole buffering mechanism is reduced in the presence of buffer spring；Before plunger is up, underground
Buffer unit has supporting role always to plunger；
（3）Underground plunger lift down-hole buffering mechanism is salvaged, connecting pulling and running tool with well steel wire is lowered into underground plunger lift well
Lower buffer unit position, is above carried after pulling and running tool is docked with fishing head, now goes up core cylinder and is moved relative on body, and closing piece is returned to
Upper core cylinder bottleneck, external diameter is less than seating nipple internal diameter at closing piece, and body is salvaged successfully with being moved on upper core cylinder.
2. a kind of plunger lift down-hole buffering mechanism according to claim 1, it is characterised in that described body（9）With
Second adapter sleeve（6）Between be additionally provided with baffle ring（7）, and the baffle ring（7）Outside face and the second adapter sleeve（6）Inner edge face contact,
Described body（9）Second adapter sleeve is fixed on by screw thread（6）It is interior.
3. a kind of plunger lift down-hole buffering mechanism according to claim 1, it is characterised in that described valve seat（15）
Be shaped as up-small and down-big step-like, described valve seat（15）Upper end be inserted into the linkage section（10）It is interior, it is described
Sealing ring（13）Positioned at linkage section（10）With valve seat（15）Step between.
4. a kind of plunger lift down-hole buffering mechanism according to claim 1, it is characterised in that described upper core cylinder（5）
Bottom cylinder be provided with telescopic claw, described lower core cylinder（12）Medial surface is provided with telescopic chute, and described telescopic claw is in telescopic chute
Interior turnover.
5. a kind of plunger lift down-hole buffering mechanism according to claim 1, it is characterised in that described upper core cylinder（5）
Upper end extend into the second adapter sleeve（4）It is interior, and by screw thread and the second adapter sleeve（4）It is fixedly connected.
6. a kind of plunger lift down-hole buffering mechanism according to claim 1, it is characterised in that described lower core cylinder（12）
Lower end be deep into valve seat（15）It is interior, and by screw thread and valve seat（15）It is fixedly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410770149.8A CN104499997B (en) | 2014-12-15 | 2014-12-15 | A kind of plunger lift down-hole buffering mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410770149.8A CN104499997B (en) | 2014-12-15 | 2014-12-15 | A kind of plunger lift down-hole buffering mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN104499997A CN104499997A (en) | 2015-04-08 |
| CN104499997B true CN104499997B (en) | 2017-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410770149.8A Active CN104499997B (en) | 2014-12-15 | 2014-12-15 | A kind of plunger lift down-hole buffering mechanism |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101883A (en) * | 2019-12-16 | 2020-05-05 | 中国石油天然气股份有限公司 | Underground buffering seating device suitable for horizontal well plunger gas lift and working method thereof |
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|---|---|
| CN104499997A (en) | 2015-04-08 |
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