CN107780862A - Underground throttle device fishing device - Google Patents
Underground throttle device fishing device Download PDFInfo
- Publication number
- CN107780862A CN107780862A CN201710867633.6A CN201710867633A CN107780862A CN 107780862 A CN107780862 A CN 107780862A CN 201710867633 A CN201710867633 A CN 201710867633A CN 107780862 A CN107780862 A CN 107780862A
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- Prior art keywords
- push rod
- shoulder
- spring
- limit boss
- claw
- 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.)
- Granted
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- 210000000078 claw Anatomy 0.000 claims description 55
- 238000009434 installation Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 16
- 238000013461 design Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Marine Sciences & Fisheries (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to the technical field of down-hole fishing device, it is a kind of underground throttle device fishing device, it includes top connection, body, jaw components, push rod, piston, the lower end of top connection is fixedly connected with the upper end of body, the lower end of body is fixedly connected with jaw components, piston is arranged in upper shell, and push rod is arranged in body.Reasonable and compact in structure of the present invention, pass through the ingehious design to jaw components internal structure, using hydraulic pressure to piston with applying downward thrust on push rod, it is broken the first shear pin, and then jaw components are made to realize the action for capturing flow controller, flow controller can be firmly captured, improves the success rate of salvaging, has saved salvaging cost；It in the event of jam, then need to only continue above to put forward the present invention, be broken the second shear pin, now jaw components are separated with flow controller, due to can flexibly escape danger when running into jam, therefore improve the practicality and security of the present invention.
Description
Technical field
The present invention relates to the technical field of down-hole fishing device, is a kind of underground throttle device fishing device.
Background technology
At present, downhole choke technology has become one of low pressure, key technology of low yield gas field development, and flow controller is well
The key device that lower throttling technology is achieved, but because reason, the part gas wells such as underground shakes out, fouling, corrosion have steel wire
Salvage that underground throttle device difficulty is big, low success rate of problem, if even if salvaging for underground throttle device can not be realized, may make
It can not implement to steep the measures such as row, speed column, plunger lift into part low pressure water-producing gas well, cause gas well yield low or stop well,
And be finally flow controller to be taken out, it is necessary to kill-job plays the measures such as tubing string or with pressure tubing string, and these measures not only expense
Costliness, bit freezing and higher well control safety risk also be present, there is presently no a kind of no salvaging cost is low, success rate is high beats
Fishing combined tool.
The content of the invention
The invention provides a kind of underground throttle device fishing device, overcomes the deficiency of above-mentioned prior art, it can be effective
Solve the problems, such as that the method success rate for salvaging flow controller at present is low, it is high to salvage cost.
The technical scheme is that realized by following measures：A kind of underground throttle device fishing device includes above connecing
Head, body, jaw components, push rod, piston, top connection and body are all cylindrical, are provided with the upper port inwall of top connection
Thread segment, the lower end of top connection are fixedly connected with the upper end of body, and piston is arranged in top connection, are set on the upper surface of piston
There is the upper limit boss of evagination, be provided with the top connection inwall below upper limit boss corresponding with upper limit boss upper
Shoulder, is provided with the first motion gap between the lower surface of upper limit boss and the upper surface of upper shoulder, push rod is arranged on body
It is interior, the lower limit boss of evagination is provided with the upper surface of push rod, be provided with the inner body wall below lower limit boss with
The corresponding lower shoulder of lower limit boss, is provided with the second sliding between the lower surface of lower limit boss and the upper surface of lower shoulder
Gap, the push rod outside downward along lower limit boss lower surface is provided with the limited impression corresponding with lower shoulder, external along this
The installation annular groove corresponding with lower shoulder position is provided with the horizontal circumferencial direction of side, installation annular groove at least provided with
Two first through hole for running through lower shoulder, installation annular groove inner sleeve are equipped with the extension spring of ring-type, are both provided with first through hole by extension spring
It is limited in first through hole and continues lock pin of the top pressure on push rod lateral surface, also at least provided with two along water on lower shoulder
Second through hole of flat round circumferential direction distribution, it is both provided with fixing the first shear pin of push rod, the lower end of push rod in the second through hole
Extend substantially downward in jaw components, the baffle ring for preventing jaw components from dropping, jaw components are fixedly connected with the lower end outer wall of push rod
It is fixedly connected by the second shear pin being arranged on body with body, is internally provided with the lower end of body and is sleeved on push rod
On the first spring, the first spring is in that one end top pressure of the first spring is on the lower surface of lower shoulder, the first spring by compression shape
Other end top pressure on the upper surface of jaw components, second be sleeved on jaw components is provided with the outside of jaw components
Spring.
Here is the further optimization and/or improvements to foregoing invention technical scheme：
Above-mentioned jaw components include sleeve, master jaw, mounting cylinder and claw, and the upper end of sleeve is inserted into body and passes through setting
The second shear pin on body is fixedly connected with body, and the lower end of sleeve and the upper end of master jaw are fixed, and are justified along master jaw
Two claw breach are at least evenly equipped with circumferential direction, claw is arranged in claw breach, is integrally fixed on the lower end inner wall of claw
There is a latch, be provided with the sliding block breach of one section of axial direction on each claw breach on the barrel of square socket, mounting cylinder is sleeved on sleeve
Outside, hole clipping corresponding with sliding block breach is circumferentially intervally distributed with mounting cylinder, sliding block is both provided with sliding block breach
Pin, the medial roof of slider pin are pressed on the outer wall of push rod, are plugged on the outside of slider pin in hole clipping, the sleeve below slider pin
Installation gap is provided between inwall and push rod outer wall, is provided with installation gap and is fixedly connected with baffle ring with push rod outer wall, the
The upper end top pressure of one spring is on the lower surface of lower shoulder, and the lower end top pressure of the first spring is on the upper surface of sleeve, the second bullet
Spring is sleeved on the outside of sleeve, and the upper end top pressure of second spring is on the lower surface of body, and the lower end top pressure of second spring is in card
On the upper surface of pawl.
At least provided with first sealing ring, upper shoulder between the outside of above-mentioned upper limit boss and the inwall of top connection
Outside and body inwall between at least provided with second sealing ring, the outside of lower limit boss and the inwall of body it
Between at least provided with the 3rd sealing ring.
Above-mentioned upper limit boss and upper shoulder are all in annular shape, or/and, lower limit boss and lower shoulder are all in annular shape.
Above-mentioned top connection between body with being threadedly coupled.
Reasonable and compact in structure of the present invention, by the ingehious design to jaw components internal structure, using hydraulic pressure to piston
With applying downward thrust on push rod, the first shear pin is broken, and then jaw components is realized the action for capturing flow controller,
Simple in construction, stable performance, flow controller can be firmly captured, and the success rate salvaged is high, due to simplifying salvaging process,
Therefore salvaging cost has been saved；In the event of jam, it is necessary to be separated of the invention with salvaged thing, then need to only continue above to carry this
Invention, it is broken the second shear pin, now jaw components are separated with flow controller, due to can flexibly be taken off when running into jam
Danger, therefore improve the practicality and security of the present invention.
Brief description of the drawings
Accompanying drawing 1 is the main view half section schematic of preferred embodiment.
Coding in accompanying drawing is respectively：1 is top connection, and 2 be body, and 3 be push rod, and 4 be piston, and 5 be upper limit boss, 6
It is the first motion gap for upper shoulder, 7,8 be lower limit boss, and 9 be lower shoulder, and 10 be the second motion gap, and 11 be spacing recessed
Groove, 12 be installation annular groove, and 13 be first through hole, and 14 be extension spring, and 15 be lock pin, and 16 be the second through hole, and 17 be the first shear pin,
18 be the first spring, and 19 be second spring, and 20 be sleeve, and 21 be master jaw, and 22 be the second shear pin, and 23 be claw breach,
24 be claw, and 25 be latch, and 26 be sliding block breach, and 27 be slider pin, and 28 be installation gap, and 29 be baffle ring, and 30 be the first sealing
Circle, 31 be the second sealing ring, and 32 be the 3rd sealing ring.
Embodiment
The present invention is not limited by following embodiments, can technique according to the invention scheme and actual conditions it is specific to determine
Embodiment.
In the present invention, for the ease of description, the description of the relative position relation of each part is according to Figure of description 1
Butut mode be described, such as：The position relationship of upper and lower, left and right etc. is the Butut direction according to Figure of description 1
Come what is determined.
With reference to embodiment and accompanying drawing, the invention will be further described：
As shown in Figure 1, the underground throttle device fishing device includes top connection 1, body 2, jaw components, push rod 3, piston 4, on
Joint 1 and body 2 are all cylindrical, and thread segment, lower end and the body 2 of top connection 1 are provided with the upper port inwall of top connection 1
Upper end be fixedly connected, piston 4 is arranged in top connection 1, and the upper limit boss 5 of evagination is provided with the upper surface of piston 4,
The upper shoulder 6 corresponding with upper limit boss 5, upper limit boss 5 are provided with the inwall of top connection 1 of the lower section of upper limit boss 5
Lower surface and upper shoulder 6 upper surface between be provided with the first motion gap 7, push rod 3 is arranged in body 2, push rod 3 it is upper
The lower limit boss 8 of evagination is provided with end face, is provided with the inwall of body 2 below lower limit boss 8 convex with lower limit
The corresponding lower shoulder 9 of platform 8, the second motion gap is provided between the lower surface of lower limit boss 8 and the upper surface of lower shoulder 9
10, the outside of push rod 3 of the lower end of lower limit boss 8 downwards is provided with the limited impression 11 corresponding with lower shoulder 9, along body
The installation annular groove 12 corresponding with the position of lower shoulder 9 is provided with the horizontal circumferencial direction of 2 lateral surfaces, in installation annular groove 12 extremely
Two first through hole 13 for running through lower shoulder 9 are provided with less, and the extension spring 14 that ring-type is set with annular groove 12, first through hole 13 are installed
Inside it is both provided with being limited in first through hole 13 by extension spring 14 and continues lock pin 15 of the top pressure on the lateral surface of push rod 3, is leaving office
Also it is both provided with fixing in the second through hole 16 at least provided with two the second through holes 16 being distributed along horizontal circumferencial direction on shoulder 9
First shear pin 17 of push rod 3, the lower end of push rod 3 extend substantially downward in jaw components, are fixedly connected on the lower end outer wall of push rod 3
There is the baffle ring 29 for preventing jaw components from dropping, jaw components are consolidated by the second shear pin 22 being arranged on body 2 with body 2
Fixed connection, is internally provided with the first spring 18 being sleeved on push rod 3 in the lower end of body 2, the first spring 18 be in by compression shape,
One end top pressure of first spring 18 is on the lower surface of lower shoulder 9, and the other end top pressure of the first spring 18 is in the upper of jaw components
On end face, the second spring 19 being sleeved on jaw components is provided with the outside of jaw components.
When needing the flow controller in well salvaging well, the tool string for being connected with the present invention need to be only transferred in well, profit
With the gravity of tool string, the jaw components of the present invention are made firmly to catch the fishing neck of flow controller, then by tool string toward originally
Injection liquid in invention, the internal pressure of the present invention is improved, the first shear pin 17 is broken under pressure, and of the invention is interior
Portion's hydraulic action is on piston 4, and moving down for piston 4 will force push rod 3 also together to move down, and the thrust of push rod 3 makes on flow controller
Cone and slip insert produce relative displacement, unlock flow controller, now continue above to put forward tool string can that flow controller is smooth
Well is salvaged on ground, if for some reason, jam occurs after flow controller is caught for the present invention, can not above be carried, it is necessary in time will
The present invention separates from flow controller, now only need it is appropriate continue above to put forward the present invention, cut the second shear pin 22, claw group
Part will no longer capture flow controller, continue above to put forward can of the present invention successfully by the present invention successfully recovery taking-up.Present invention knot
Structure is simple, stable performance, can firmly capture flow controller, and the success rate salvaged is high, whole crawl or release flow controller
Process, all it is to be completed by its internal mechanism of itself, simplifies salvaging process, saved salvaging cost, it is time saving and energy saving, ensure
Normal construction speed, suitable large-scale promotion.
Above-mentioned underground throttle device fishing device can be made further optimization and/or improvements according to being actually needed：
As shown in Figure 1, jaw components include sleeve 20, master jaw 21, mounting cylinder and claw 24, and the upper end of sleeve 20 is inserted into
In body 2 and the second shear pin 22 by being arranged on body 2 is fixedly connected with body 2, the lower end of sleeve 20 and claw
The upper end of seat 21 is fixed, and two claw breach 23 is at least evenly equipped with along the circumferencial direction of master jaw 21, claw 24 is arranged on claw
In breach 23, latch 25 is integrally fixed with the lower end inner wall of claw 24, on each claw breach 23 on the barrel of square socket 20
The sliding block breach 26 of one section of axial direction is provided with, mounting cylinder is sleeved on the outside of sleeve 20, is circumferentially spaced apart on mounting cylinder
Have with 26 corresponding hole clipping of sliding block breach, be both provided with slider pin 27 in sliding block breach 26, the medial roof of slider pin 27, which is pressed in, to be pushed away
On the outer wall of bar 3, the outside of slider pin 27 is plugged in hole clipping, the inwall of sleeve 20 below slider pin 27 and the outer wall of push rod 3
Between be provided with installation gap 28, be provided with baffle ring 29, the first spring 18 be fixedly connected with the outer wall of push rod 3 in installation gap 28
Upper end top pressure on the lower surface of lower shoulder 9, the lower end top pressure of the first spring 18 is on the upper surface of sleeve 20, second spring
19 are sleeved on the outside of sleeve 20, and the upper end top pressure of second spring 19 is on the lower surface of body 2, the lower end top of second spring 19
It is pressed on the upper surface of claw 24.
The jaw components of the present invention have two effects, and one is crawl flow controller, and another departs from flow controller.Jaw components
Capture the specific work process of flow controller：During the present invention is transferred, the upper surface of flow controller can progress into claw
In the bottom of seat 21, the inner side of jaw components upper clipping claw breach 23 connects with the inside of master jaw 21, installed in claw breach 23
By the top pressure of flow controller, claw 24 can be moved up by slider pin 27 along sliding block breach 26 for interior its underpart of claw 24,
And then second spring 19 is compressed, due to moving up and crimp of the flow controller to claw 24 for claw 24 so that be arranged on claw
The latch 25 of 24 lower end insides can depart from out of claw breach 23, at the same time, be available for latch 25 to hook on flow controller fishing neck
Outer completely into in master jaw 21, as second spring 19 gradually recovers deformation, claw 24 can be pressed down against, force card
Pawl 24 is reset in claw breach 23 with latch 25, and now latch 25 has just firmly been hooked on fishing neck.
Jaw components depart from the specific work process of flow controller：If flow controller is caused to be stuck in well for some reason
And can not above carry, it is necessary to cancel salvaging plan, then need to separate the present invention from flow controller, now only need appropriate continuation
The present invention is above put forward, when the pulling force above carried reaches the design load of the second shear pin 22, the second shear pin 22 is broken, at script
In the first spring 18 meeting abrupt release elastic force of compressive state, the pressure of the first spring 18 can force sliding sleeve to move down, now latch
25 just have one section of axially opposing gap between claw breach 23, and now latch 25 just can not be limited to claw by master jaw 21 again
In breach 23, claw 24 can not keep tightening up, holding the state of flow controller, slightly lift, and claw 24 will be from card with latch 25
Depart from pawl breach 23, no longer capture flow controller, persistently lift tool string can and the present invention is successfully reclaimed at well head, then
By thinking that other methods pull the flow controller being trapped in well out.
After being all broken due to the first shear pin 17 and the second shear pin 22, whole jaw components will be with push rod 3, sheet
Body 2 is completely disengaged, if be not any limitation as, whole jaw components will be together trapped in well with flow controller, baffle ring 29
The generation for being just that of avoiding this situation is set, and after the fracture of the second shear pin 22, the position of baffle ring 29 is exactly the descending of sliding block
The limit, the baffle ring 29 being fixed on push rod 3 is by limiting slider pin 27, it is possible to avoids jaw components together stagnant with flow controller
Stay in well.The ingehious design of jaw components internal structure, both ensure that the success rate of jaw components crawl flow controller, and and can exists
Flexibly escape danger when running into jam, improve the practicality and security of the present invention.
As shown in Figure 1, it is first close at least provided with one between the inwall of the outside of upper limit boss 5 and top connection 1
Seal 30, at least provided with second sealing ring 31 between the outside of upper shoulder 6 and the inwall of body 2, lower limit boss 8
At least provided with the 3rd sealing ring 32 between the inwall of outside and body 2.First sealing ring 30, the second sealing ring 31,
The setting of three sealing rings 32, the sealing intensity of the present invention can be increased, ensure the seal when present invention builds the pressure, enable the invention to
It is enough successfully to cut the first shear pin 17.
As shown in Figure 1, upper limit boss 5 and upper shoulder 6 are all in annular shape, or/and, lower limit boss 8 and lower shoulder 9
All in annular shape.It can so make the stress of upper limit boss 5 and upper shoulder 6, lower limit boss 8 and the contact site of lower shoulder 9 equal
It is even, the service life of itself is extended, the circular sealing being also beneficial between end face, has ensured the suitable of the process of building the pressure indirectly in addition
Profit is realized.
As shown in Figure 1, it is to be threadedly coupled between top connection 1 and body 2.So it is easy to dismantle, facilitates later period maintenance
Process.
Above technical characteristic constitutes highly preferred embodiment of the present invention, and there is stronger adaptability and optimal implementation to imitate for it
Fruit, can be according to the non-essential technical characteristic of increase and decrease be actually needed, to meet the needs of different situations.
The use process of preferred embodiment：
Preparation before step 1) salvaging：
At the scene construct before, size of the invention should select it is consistent with the gas well restriction size being salvaged, generally and its
The tool string of its instrument composition enters in well together, due to needing to reach certain pump pressure during operation, therefore need to be in tripping in tool string
When, pouring valve fluid injection into coiled tubing on well is first opened, when there is liquid to be flowed out from pouring valve liquid injection hole, represents continuous
Liquid is filled with oil pipe, now closes pouring valve.
Step 2) puts into fishing tool and captures flow controller：
The tool string for being connected with the present invention is transferred in well, after this utility model reaches the top of flow controller, quickly transfers work
Tool string, then slowly above carries tool string, if upper lifting force now is more than the suspending weight of tool string itself, has illustrated the present invention
The fishing neck of flow controller is caught.
The specific work process of the present invention in the process：During the present invention is transferred, the upper surface meeting of flow controller
Progress into the bottom of master jaw 21, the inner side of jaw components upper clipping claw breach 23 connects with the inside of master jaw 21, peace
By the top pressure of flow controller, claw 24 can be by slider pin 27 along sliding block breach for claw its underpart in claw breach 23
26 move up, and then compress second spring 19, due to moving up and crimp of the flow controller to claw 24 for claw 24 so that
Being arranged on the latch 25 of the lower end inside of claw 24 can depart from out of claw breach 23, at the same time, be available on flow controller fishing neck
The outer that latch 25 hooks, as second spring 19 gradually recovers deformation, can be pressed down against card completely into in master jaw 21
Pawl 24, claw 24 is forced to be reset to latch 25 in claw breach 23, now latch 25 has just firmly been hooked on fishing neck.
Step 3) unlocks flow controller：
After confirming that the present invention grabs flow controller, hydraulic pressure is continuously applied into tool string, makes the pressure at inner carrier 4 of the present invention
It is stepped up, until the first shear pin 17 is broken, now piston 4 can promote push rod 3 descending together, the descending distance of piston 4
For the length of the first motion gap 7, the Bottom Runby of push rod 3 is the length of the second motion gap 10, is appeared on the stage when piston 4 comes downwards to
When at shoulder 6, the upper limit boss 5 on piston 4 is limited by upper shoulder 6, and the lower limit boss 8 on push rod 3 is limited by lower shoulder 9,
During push rod 3 is descending, the thrust of push rod 3 forces the cone on flow controller to produce relative displacement with slip insert, makes throttling
Device unlocks, and in the process, the top pressure in the presence of extension spring 14 of lock pin 15 in the bottom of limited impression 11 and blocks push rod 3, makes
Push rod 3 is maintained at this position of minimum point, flow controller is always maintained at released state.
Bailing takes flow controller in step 4)：
Can above carries tool string after unblock flow controller, flow controller is salvaged into well, if causing flow controller for some reason
It is stuck in well and can not above carries, it is necessary to cancel salvaging plan, then needs to separate the present invention from flow controller, now only need
It is appropriate to continue above to put forward the present invention, when the pulling force above carried reaches the design load of the second shear pin 22, the second shear pin 22
Fracture, the first spring 18 meeting abrupt release elastic force in compressive state, the pressure of the first spring 18 can be forced under sliding sleeve originally
Move, now latch 25 just has one section of axially opposing gap between claw breach 23, and now master jaw 21 just can not be again by latch
25 are limited in claw breach 23, and claw 24 can not keep tightening up, holding the state of flow controller, slightly lift, claw 24 and card
Tooth 25 will depart from out of claw breach 23, no longer capture flow controller, and it is successful at well head persistently to lift tool string can
The recovery present invention, then by thinking that other methods pull the flow controller being trapped in well out.
Claims (8)
- A kind of 1. underground throttle device fishing device, it is characterised in that including top connection, body, jaw components, push rod, piston, on Joint and body are all cylindrical, are provided with thread segment on the upper port inwall of top connection, the lower end of top connection and body it is upper End is fixedly connected, and piston is arranged in top connection, and the upper limit boss of evagination is provided with the upper surface of piston, convex in upper limit The upper shoulder corresponding with upper limit boss is provided with top connection inwall below platform, the lower surface of upper limit boss is with appearing on the stage The first motion gap is provided between the upper surface of shoulder, push rod is arranged in body, and evagination is provided with the upper surface of push rod Lower limit boss, the lower shoulder corresponding with lower limit boss, lower limit are provided with the inner body wall below lower limit boss The second motion gap is provided between the position lower surface of boss and the upper surface of lower shoulder, downward along lower limit boss lower surface The limited impression corresponding with lower shoulder is provided with the outside of push rod, is provided with along the horizontal circumferencial direction in outer body face with The corresponding installation annular groove in shoulder position, at least provided with two first through hole for running through lower shoulder, installation in installation annular groove The extension spring of ring-type is set with annular groove, is both provided with being limited in first through hole and continued by extension spring top pressure in first through hole pushing away Lock pin on bar lateral surface, on lower shoulder also at least provided with two along horizontal circumferencial direction be distributed the second through holes, second It is both provided with fixing the first shear pin of push rod in through hole, the lower end of push rod is extended substantially downward in jaw components, the lower end of push rod It is fixedly connected with the baffle ring for preventing jaw components from dropping on outer wall, jaw components pass through the second shear pin for being arranged on body It is fixedly connected with body, the first spring being sleeved on push rod is internally provided with the lower end of body, the first spring is in be compressed Shape, one end top pressure of the first spring is on the lower surface of lower shoulder, and the other end top pressure of the first spring is in the upper end of jaw components On face, the second spring being sleeved on jaw components is provided with the outside of jaw components.
- 2. underground throttle device fishing device according to claim 1, it is characterised in that jaw components include sleeve, claw Seat, mounting cylinder and claw, the upper end of sleeve is inserted into body and the second shear pin and body by being arranged on body It is fixedly connected, the lower end of sleeve and the upper end of master jaw are fixed, and two claws are at least evenly equipped with along master jaw circumferencial direction and are lacked Mouthful, claw is arranged in claw breach, is integrally fixed with latch on the lower end inner wall of claw, square socket on each claw breach The sliding block breach of one section of axial direction is provided with barrel, mounting cylinder is sleeved on the outside of sleeve, and circumferentially interval is divided on mounting cylinder Hole clipping corresponding with sliding block breach is furnished with, slider pin is both provided with sliding block breach, the medial roof of slider pin is pressed in the outer of push rod On wall, it is plugged on the outside of slider pin in hole clipping, installation is provided between the sleeve lining and push rod outer wall below slider pin Gap, it is provided with installation gap and baffle ring is fixedly connected with push rod outer wall, the upper end top pressure of the first spring is under lower shoulder On end face, the lower end top pressure of the first spring is on the upper surface of sleeve, and second spring is sleeved on the outside of sleeve, second spring Upper end top pressure is on the lower surface of body, and the lower end top pressure of second spring is on the upper surface of claw.
- 3. underground throttle device fishing device according to claim 1 or 2, it is characterised in that the outside of upper limit boss with it is upper At least provided with first sealing ring between the inwall of joint, between the outside of upper shoulder and the inwall of body at least provided with One the second sealing ring, at least provided with the 3rd sealing ring between the outside of lower limit boss and the inwall of body.
- 4. underground throttle device fishing device according to claim 1 or 2, it is characterised in that upper limit boss and upper shoulder are all In annular shape, or/and, lower limit boss and lower shoulder are all in annular shape.
- 5. underground throttle device fishing device according to claim 3, it is characterised in that upper limit boss and upper shoulder are all in Annular shape, or/and, lower limit boss and lower shoulder are all in annular shape.
- 6. according to the underground throttle device fishing device described in claim 1 or 2 or 5, it is characterised in that be between top connection and body Threaded connection.
- 7. underground throttle device fishing device according to claim 3, it is characterised in that connect between top connection and body for screw thread Connect.
- 8. underground throttle device fishing device according to claim 4, it is characterised in that connect between top connection and body for screw thread Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710867633.6A CN107780862B (en) | 2017-09-22 | 2017-09-22 | Fishing device for underground throttler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710867633.6A CN107780862B (en) | 2017-09-22 | 2017-09-22 | Fishing device for underground throttler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107780862A true CN107780862A (en) | 2018-03-09 |
| CN107780862B CN107780862B (en) | 2023-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710867633.6A Active CN107780862B (en) | 2017-09-22 | 2017-09-22 | Fishing device for underground throttler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107780862B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590559A (en) * | 2018-07-12 | 2018-09-28 | 长江大学 | A kind of down-hole fishing device |
| CN110439492A (en) * | 2018-05-03 | 2019-11-12 | 中国石油天然气股份有限公司 | Underground throttle device recyclable device and method |
| CN111946306A (en) * | 2020-08-21 | 2020-11-17 | 中国石油天然气股份有限公司 | Process method of hydraulic deblocking restrictor |
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| CN110439492A (en) * | 2018-05-03 | 2019-11-12 | 中国石油天然气股份有限公司 | Underground throttle device recyclable device and method |
| CN110439492B (en) * | 2018-05-03 | 2021-11-02 | 中国石油天然气股份有限公司 | Underground choke recycling device and method |
| CN108590559A (en) * | 2018-07-12 | 2018-09-28 | 长江大学 | A kind of down-hole fishing device |
| CN108590559B (en) * | 2018-07-12 | 2024-03-22 | 长江大学 | Underground fishing device |
| CN111946306A (en) * | 2020-08-21 | 2020-11-17 | 中国石油天然气股份有限公司 | Process method of hydraulic deblocking restrictor |
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