CN203891852U - Sand blocking prevention downhole restriction choke easy to unlock - Google Patents
Sand blocking prevention downhole restriction choke easy to unlock Download PDFInfo
- Publication number
- CN203891852U CN203891852U CN201420299114.6U CN201420299114U CN203891852U CN 203891852 U CN203891852 U CN 203891852U CN 201420299114 U CN201420299114 U CN 201420299114U CN 203891852 U CN203891852 U CN 203891852U
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- China
- Prior art keywords
- core pipe
- cover
- pin
- cone
- sand
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- 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
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Abstract
The utility model discloses a sand blocking prevention downhole restriction choke easy to unlock. The sand blocking prevention downhole restriction choke easy to unlock comprises a throwing head, a first pin, a salvage head, a locking ring, a second pin, a shear ring, a slip recess, a suspension sleeve, a slip, a cone, a rubber sleeve, a pressure-bearing sleeve, a third pin, a core tube, a throttle nozzle and a sand filter cover. According to the sand blocking prevention downhole restriction choke easy to unlock, anchoring and setting are reliable, anchoring of the slip is relieved by the adoption of the mode that the cone is retreated during salvage, setting release and anchoring release are reliable, and salvage is smooth; the technical problems that jam release of the slip is difficult, salvage is hard, and sand blocking easily occurs are effectively solved; liquid carrying capacity of gas wells is improved, and the sand blocking phenomenon happening to the throttle nozzle is avoided.
Description
Technical field
The utility model belongs to the drainage gas recovery field of natural gas extraction, relates to a kind of easily release sand-blockage underground throttle device.
Background technology
Low-voltage and low-yield gas well enters the exploitation later stage, and due to the reduction of aerogenesis flow velocity and the decay of stratum energy, the ability that air-flow carries liquid declines, and causes the even water logging of pit shaft hydrops; In addition, traditional well head flow-control is generally, at surface line, flow nipple is installed, and because the step-down of flow nipple produces effects of reduced temperature, causes choke flow line to freeze, and easily causes flow nipple ice stifled, and for this reason, downhole choke technology is widely used.Underground throttle device is the throttling instrument that is contained in down-hole, utilizes the huge thermal field compensation on stratum because the temperature that flow nipple step-down causes declines, and has avoided flow nipple ice to block up problem.Meanwhile, the hypotensive effect of flow nipple makes the pressure decreased of flow nipple top pit shaft, thereby gas discharge and flow velocity increase, and have increased the fluid-carrying capability of air-flow, has improved the discharge opeing effect of gas well exploitation.
Existing underground throttle device ubiquity is salvaged difficulty, the problems such as the easy sand plug of flow nipple.Retrieve prior art document, also do not seen good solution.Patent documentation CN2732993Y(application number: 200420074767.0) disclose a kind of novel gas well underground throttle device, described restriction choke is to utilize cam engaging to be fixed in the groove of oil pipe joint hoop.This type of fixed form is because oil pipe joint hoop groove is narrow and small, and groove chamfering is larger, and when engaging, operation easier is larger.This restriction choke instrument is that the top slips that draws carries out unfreezing while salvaging, and because cone is not removed the radial effect power of slips, it is irrational directly going up La Kawa unfreezing, and therefore fishing success ratio is lower.Patent documentation CN202381055U discloses a kind of anti-fall valve slip-type underground throttle of destroying, and patent documentation CN103541697A(application number: 201210241337.2) disclose a kind of anti-fall single packing element downhole choke device, to utilize spring-loaded pawl engaging instrument of being shifted elsewhere for garrison duty in the groove of oil pipe joint hoop to glide, when same engaging, operation easier is larger, reliability is poor, when salvaging, be also that the top slips that draws carries out stiff unfreezing, salvage difficulty.Patent documentation CN202832433U(application number: 201220366184.X) a kind of easy fishing slip formula underground throttle device disclosed, its main improvement is that body and cone adopt gingival cyst of mucous gland in the newborn to tip row locking in, ensure the reliability of packing element sealing, but the defect of this patent is not lock slips, the relative body of slips is freely, and upper La Kawa salvages and is difficult to unfreezing.Other Patents is also directly to go up La Kawa unfreezing fishing mostly, therefore salvages difficulty large, and reliability is poor, and in addition, some underground throttle devices do not have sand control structure, and flow nipple is easily by sand plug, or sand control unreasonable structure.
Summary of the invention
Be difficult to resolve card for solving above-mentioned slips, salvage the technical problem such as difficulty, easy sand plug, the utility model provides a kind of easy release sand-blockage underground throttle device, for improving the fluid-carrying capability of gas well, avoids the stifled phenomenon of ice of flow nipple sand plug and ground throttling.
The technical scheme that the utility model is taked is:
A kind of easily release sand-blockage underground throttle device, comprises and throws in head, the first pin, fishing head, lock ring, the second pin, shearing ring, slip spider, suspension cover, slips, cone, packing element, pressure-bearing cover, the 3rd pin, core pipe, flow nipple, filter sand cover.
Described input head is fixedly connected with the upper end of core pipe by the first pin.
Described fishing head, lock ring, shearing ring are sleeved on core pipe.Fishing head is arranged on the below of throwing in head.Lock ring and shearing ring are placed in the space between core pipe and fishing head.Lock ring is arranged on the top of shearing ring.Fishing head and shearing ring are fixedly linked by the second pin.
Described slip spider is connected with the lower thread of fishing head, and is connected with the top that hangs cover.
Described suspension cover is sleeved on core pipe.Hang cover and be arranged on the below of shearing ring, and and shearing ring between there is gap.
Described cone is placed in the below that hangs cover, and is sleeved on core pipe.Cone is connected with suspension external threading, and the conical surface and the slips of cone are connected.
The upper end of described slips is connected with the bottom of slip spider.
Described packing element, pressure-bearing cover are sleeved on core pipe.Packing element is arranged between cone and pressure-bearing cover.Pressure-bearing cover is fixedly linked by the 3rd pin and core pipe.
Described filter sand cover is arranged on the lower end of core pipe, and is connected with core gas thread.
Described flow nipple is arranged on the inside, lower end of core pipe, and top in filter sand cover.
The vertical axis of the vertical axis of described flow nipple, filter sand cover and core pipe coincides.
As preferably, described lock ring (4) is provided with Inner gingival cyst of mucous gland in the newborn with the contact surface Inner of core pipe (14) and buckles, and arranges and Inner gingival cyst of mucous gland in the newborn is buckled the outer gingival cyst of mucous gland in the newborn matching and buckled on the outer tube wall of core pipe (14).
As preferably, described filter sand cover is cone barrel, and the body wall of filter sand cover arranges slot.
The utility model has the advantages that:
1, the outer gingival cyst of mucous gland in the newborn of core pipe of the present invention is buckled and the Inner gingival cyst of mucous gland in the newborn padlock of lock ring is fixed matches with the second pin release, has both ensured positiver sealing and the grappling of slips and packing element, ensures again the smooth deblocking of slips and packing element.
2, the present invention adopts the mode that exits cone to remove the grappling of slips, disanchors reliable, salvages smoothly.
3, filter sand cover of the present invention is cone barrel filter sand structure, is conducive to the axial flow of fluid, and sand is difficult for piling up, the risk of having subdued sand plug.
Below with reference to drawings and Examples, the utility model is described in further details.
Brief description of the drawings
Fig. 1 is the structural representation of easy release sand-blockage underground throttle device.
Fig. 2 is the partial enlarged drawing at I place in Fig. 1.
Description of reference numerals: 1, throw in head; 2, the first pin; 3, fishing head; 4, lock ring; 5, the second pin; 6, shearing ring; 7, slip spider; 8, hang cover; 9, slips; 10, cone; 11, packing element; 12, pressure-bearing cover; 13, the 3rd pin; 14, core pipe; 15, flow nipple; 16, filter sand cover.
Detailed description of the invention
Embodiment 1
This enforcement provides a kind of easy release sand-blockage underground throttle device, as depicted in figs. 1 and 2, by throwing in 1, the first pin 2, fishing head 3, lock ring 4, the second pin 5, shearing ring 6, slip spider 7, hang cover 8, slips 9, cone 10, packing element 11, pressure-bearing cover 12, the 3rd pin 13, core pipe 14, flow nipple 15, filter sand cover 16 and form.
Throwing in 1 is fixedly connected with the upper end of core pipe 14 by the first pin 2.Fishing head 1, lock ring 4, shearing ring 6 are sleeved on core pipe 14.Fishing head 3 is arranged on a below of throwing in 1.Lock ring 4 and shearing ring 6 are placed in the space between core pipe 14 and fishing head 3.Lock ring 4 is arranged on the top of shearing ring 6, and especially, lock ring 4 is provided with Inner gingival cyst of mucous gland in the newborn with the contact surface Inner of core pipe 14 and buckles 17.Fishing head 3 and shearing ring 6 are fixedly linked by the second pin 5.
Slip spider 7 is connected with the lower thread of fishing head 3, and is connected with the top that hangs cover 8.Hanging cover 8 is sleeved on core pipe 14.Hang the below that cover 8 is arranged on shearing ring 6, and and shearing ring 6 between there is gap.
Cone 10 is placed in the below that hangs cover 8, and is sleeved on core pipe 14.It should be noted that, cone 10 is threaded with hanging cover 8, and the conical surface of cone 10 and slips 9 are connected.
The upper end of slips 9 is connected with the bottom of slip spider 7.
Packing element 11, pressure-bearing cover 12 are sleeved on core pipe 14.Packing element 11 is arranged between cone 10 and pressure-bearing cover 12.Pressure-bearing cover 12 is fixedly linked with core pipe 14 by the 3rd pin 13.
Filter sand cover 16 is arranged on the lower end of core pipe 14, and is threaded with core pipe 14.Flow nipple 15 is arranged on the inside, lower end of core pipe 14, and top in filter sand cover 16.
The vertical axis of described flow nipple 15, filter sand cover 16 and the vertical axis of core pipe 14 coincide.
Described core pipe 14 is hollow tubular structure, and core pipe 14 is buckled with setting on suspension cover 8 outer tube walls that contact and Inner gingival cyst of mucous gland in the newborn the outer gingival cyst of mucous gland in the newborn matching and buckled.
As preferably, described filter sand cover 16 is cone barrel, and the body wall of filter sand cover 16 arranges slot.
It should be noted that, the filter sand cover 16 described in the present embodiment is to realize sand control object main member, and the design feature of filter sand cover 16 is to utilize a cone cylinder slot to carry out sand control.It is advantageous that: the one, slot is larger than the area of passage of punching, is easy to fluid and flows, and reduces energy loss; The 2nd, traditional sand control member is straight-cylindrical sand filtering barrel, and because the annular clearance of sand filtering barrel and oil pipe is narrow and small, sand is easily piled up in the annular space of sand filtering barrel and oil pipe, stops up fluid and flows.Filter sand cover 16 sands of cone barrel easily fall, and have subdued the risk that sand is piled up, and cone barrel is conducive to the axial flow of fluid than straight tube shape.The gas-liquid flow in shaft bottom is through filter sand cover 16, filter the larger solid phase particles such as sand, enter flow nipple 15, after reducing pressure by regulating flow, gas phase part increases because pressure reduces volume, although throttling has effects of reduced temperature, but the temperature place huge by stratum compensates, gas expansion is flow and flow velocity increase, thereby carries the ability enhancing of liquid, has reached the object of water pumping gas production.
Embodiment 2
The input of the present embodiment commute release sand-blockage underground throttle device and salvaging work progress describe.Sand control throttling work progress to this restriction choke is illustrated in embodiment 1, and the present embodiment repeats no more.
The easily input of release sand-blockage underground throttle device construction:
With steel wire, this restriction choke is transferred in oil pipe from well, fishing head 3, lock ring 4, the second pin 5, shearing ring 6, slip spider 7, slips 9 are because Action of Gravity Field falls naturally, and slips 9 is flared to tube inner wall and contacts along cone 10.Under on after design attitude, carry steel wire, slips 9 is anchored on tube inner wall.In continuation, carry steel wire, cut off the 3rd pin 13, core pipe 14 drive flow nipple 15 and filter sand cover 16 up, the Inner gingival cyst of mucous gland in the newborn button of lock ring 4 and the outer gingival cyst of mucous gland in the newborn of core pipe 14 are buckled and are started interlock, make core pipe 14 can only be up can not be descending.In continuation, carry steel wire, when packing element 11 reach design cut off when sealability the first pin 2(upwards jarring cut off pin), trip out and throw in 1, complete to throw in setting.The locking that the Inner gingival cyst of mucous gland in the newborn button of lock ring 4 and the outer gingival cyst of mucous gland in the newborn of core pipe 14 are buckled has ensured that the grappling of slips 9 and packing element 11 sets.
The easily salvaging of release sand-blockage underground throttle device construction:
Transfer fishing tool with steel wire and catch fishing head 3, jarring core pipe 14, cuts off the second pin 5 downwards, and the outer gingival cyst of mucous gland in the newborn of core pipe 14 is buckled and lost locking ability, and core pipe 14 and flow nipple 15 and filter sand cover 16 are descending, and packing element 11 loses axial compression and shrinks.Under continuation, hit core pipe 14, drive lock ring 4 and shearing ring 6, make cone 10 throw off slips 9, do not have the radial effect slips 9 of cone 10 to lose the ability of grappling oil pipe.On carry steel wire, fishing head 3 and slip spider 7 drive slips 9, slip spider 7 drive hang cover 8 and cone 10 up successively, avoided the unexpected accident of sitting card and packing element 11 of slips 9 to set, and then tripped out pit shaft.
As can be seen from the above, the Inner gingival cyst of mucous gland in the newborn button of lock ring 4 matches with the second pin 5 releases with the outer gingival cyst of mucous gland in the newborn padlock of core pipe 14 is fixed, the Inner gingival cyst of mucous gland in the newborn button of lock ring 4 and the outer gingival cyst of mucous gland in the newborn of core pipe 14 are buckled the grappling of being responsible for slips 9 and packing element 11 and are set, and the deblocking that the second pin 5 is responsible for slips 9 and packing element 11 is disanchored.So both ensure positiver sealing and the grappling of slips 9 and packing element 11, ensured again the smooth deblocking of slips 9 and packing element 11.In addition, adopt the mode that exits cone 10 to remove the grappling of slips 9, so not only ensured to disanchor reliably but also made and salvaged smoothly.
By reference to the accompanying drawings embodiments of the present invention are described above, but the utility model is not limited to above-mentioned embodiment, in the ken that one skilled in the relevant art possesses, can also under the prerequisite that does not depart from the utility model aim, make a variety of changes.
Claims (3)
1. an easy release sand-blockage underground throttle device, it is characterized in that, comprise and throw in head (1), the first pin (2), fishing head (3), lock ring (4), the second pin (5), shearing ring (6), slip spider (7), suspension cover (8), slips (9), cone (10), packing element (11), pressure-bearing cover (12), the 3rd pin (13), core pipe (14), flow nipple (15), filter sand cover (16);
Described input head (1) is fixedly connected with the upper end of core pipe (14) by the first pin (2);
Described fishing head (3), lock ring (4), shearing ring (6) are sleeved on core pipe (14); Fishing head (3) is arranged on the below of throwing in head (1); Lock ring (4) and shearing ring (6) are placed in the space between core pipe (14) and fishing head (3); Lock ring (4) is arranged on the top of shearing ring (6); Fishing head (3) and shearing ring (6) are fixedly linked by the second pin (5);
Described slip spider (7) is connected with the lower thread of fishing head (3), and is connected with the top that hangs cover (8);
Described suspension cover (8) is sleeved on core pipe (14); Hang cover (8) and be arranged on the below of shearing ring (6), and and shearing ring (6) between there is gap;
Described cone (10) is placed in the below that hangs cover (8), and is sleeved on core pipe (14); Cone (10) is threaded with hanging cover (8), and the conical surface of cone (10) and slips (9) are connected;
The upper end of described slips (9) is connected with the bottom of slip spider (7);
Described packing element (11), pressure-bearing cover (12) are sleeved on core pipe (14); Packing element (11) is arranged between cone (10) and pressure-bearing cover (12); Pressure-bearing cover (12) is fixedly linked by the 3rd pin (13) and core pipe (14);
Described filter sand cover (16) is arranged on the lower end of core pipe (14), and is threaded with core pipe (14);
Described flow nipple (15) is arranged on the inside, lower end of core pipe (14), and top in filter sand cover (16);
The vertical axis of the vertical axis of described flow nipple (15), filter sand cover (16) and core pipe (14) coincides.
2. easy release sand-blockage underground throttle device according to claim 1, is characterized in that: in the contact surface of described lock ring (4) and core pipe (14), be provided with interior gingival cyst of mucous gland in the newborn and buckle, arrange and interior gingival cyst of mucous gland in the newborn is buckled the outer gingival cyst of mucous gland in the newborn matching and buckled on the outer tube wall of core pipe (14).
3. easy release sand-blockage underground throttle device according to claim 1, is characterized in that: described filter sand cover (16) is cone barrel, and the body wall of filter sand cover (16) arranges slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420299114.6U CN203891852U (en) | 2014-06-06 | 2014-06-06 | Sand blocking prevention downhole restriction choke easy to unlock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420299114.6U CN203891852U (en) | 2014-06-06 | 2014-06-06 | Sand blocking prevention downhole restriction choke easy to unlock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203891852U true CN203891852U (en) | 2014-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420299114.6U Expired - Fee Related CN203891852U (en) | 2014-06-06 | 2014-06-06 | Sand blocking prevention downhole restriction choke easy to unlock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203891852U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568405A (en) * | 2014-12-25 | 2015-04-29 | 中国石油天然气集团公司 | Slips strength test device and system |
| CN106837267A (en) * | 2017-01-17 | 2017-06-13 | 咸阳荣达石油技术服务有限公司 | A kind of underground throttle device |
| CN108343404A (en) * | 2018-02-08 | 2018-07-31 | 中国石油天然气股份有限公司 | A kind of natural gas well intelligence flow controller |
| CN109057749A (en) * | 2018-07-30 | 2018-12-21 | 中国石油天然气股份有限公司 | A kind of easy fishing slip formula underground throttle device |
| CN109057761A (en) * | 2018-08-14 | 2018-12-21 | 哈尔滨艾拓普科技有限公司 | A kind of natural gas well underground throttle device of automatically controlled dispensing and salvaging |
| CN109594956A (en) * | 2018-11-29 | 2019-04-09 | 四川圣诺油气工程技术服务有限公司 | A kind of dissolvable formula underground throttle device |
| CN112302585A (en) * | 2019-07-29 | 2021-02-02 | 中国石油化工股份有限公司 | Choke and tubular column |
| CN114517653A (en) * | 2020-11-20 | 2022-05-20 | 中国石油化工股份有限公司 | Slotted pipe suspension device and composite leakage blocking method |
-
2014
- 2014-06-06 CN CN201420299114.6U patent/CN203891852U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568405A (en) * | 2014-12-25 | 2015-04-29 | 中国石油天然气集团公司 | Slips strength test device and system |
| CN104568405B (en) * | 2014-12-25 | 2017-09-01 | 中国石油天然气集团公司 | Slips strength test device and its system |
| CN106837267A (en) * | 2017-01-17 | 2017-06-13 | 咸阳荣达石油技术服务有限公司 | A kind of underground throttle device |
| CN108343404A (en) * | 2018-02-08 | 2018-07-31 | 中国石油天然气股份有限公司 | A kind of natural gas well intelligence flow controller |
| CN109057749A (en) * | 2018-07-30 | 2018-12-21 | 中国石油天然气股份有限公司 | A kind of easy fishing slip formula underground throttle device |
| CN109057761A (en) * | 2018-08-14 | 2018-12-21 | 哈尔滨艾拓普科技有限公司 | A kind of natural gas well underground throttle device of automatically controlled dispensing and salvaging |
| CN109057761B (en) * | 2018-08-14 | 2020-09-29 | 哈尔滨艾拓普科技有限公司 | Natural gas well underground throttle for electric control throwing and fishing |
| CN109594956A (en) * | 2018-11-29 | 2019-04-09 | 四川圣诺油气工程技术服务有限公司 | A kind of dissolvable formula underground throttle device |
| CN112302585A (en) * | 2019-07-29 | 2021-02-02 | 中国石油化工股份有限公司 | Choke and tubular column |
| CN114517653A (en) * | 2020-11-20 | 2022-05-20 | 中国石油化工股份有限公司 | Slotted pipe suspension device and composite leakage blocking method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20180606 |
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| CF01 | Termination of patent right due to non-payment of annual fee |