A slip-type downhole choke that is easy to salvage

A slip-type well and restrictor technology, which is applied in the direction of mining fluid, wellbore/well components, wellbore/well valve devices, etc., can solve the problem of large lifting friction resistance, low fishing success rate, sealing rubber tube Unable to retract and other problems, to achieve the effect of easy unlocking and improving the success rate of salvage

Active Publication Date: 2021-04-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The first purpose of the slip-type downhole choke that is easy to salvage provided by the present invention is to overcome the problem that the slips in the downhole choke in the prior art have stuck when the oil pipe is bitten to death during fishing; the second is to overcome the problem of the prior art When the middle slip type downhole choke is salvaged, there is a problem that the sealing rubber cylinder cannot be retracted, resulting in a large lifting frictional resistance; the third purpose is to overcome the problem of low overall fishing success rate of the slip type downhole choke in the prior art

Method used

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  • A slip-type downhole choke that is easy to salvage
  • A slip-type downhole choke that is easy to salvage
  • A slip-type downhole choke that is easy to salvage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]One easy-saving kadwa-type downhillizer, including launching tools and throttle, lifting the throttle under the putter, the launching tool includes at least the castle 1, the first shear nut 2, the lock cap 3, the shrink claw 4 and The first core rod 5, the inside of the contraction claw 4 is sequentially connected to the cast head 1 and the first core rod 5, and the lock cap 3 is connected to the outer end of the shrink claw 4, and the sprout 1 is connected by the first shear 2. Locking cap 3; the throttle includes at least the salvagep 6, the mandrel 7, the mounar pendulum 8, the first block 9, the positioning ring 10, the ferrule 11, the ferric 13, the second shear nail 14, cone 15 , The second ring 16, the connection section 17, the universal claw 18, the support body 19, the rubber 20, the core 21, the second slew rod 22, the cylinder segment 23, the nozzle 24, the mouth of the mouth 25, the clip 26 And the sand cover 27, the core shaft 7 is connected in the sidewelle 6, ...

Embodiment 2

[0027]Such asFigure 1-4As shown, a kind of easy-saving kadwa-type downhillizer, including launching tools and throttles, connecting the throttle under the putter, the launching tool includes at least the castle 1, the first shear 2, the lock cap 3, shrink The claws 4 and the first core rod 5, the inside of the shrinking claw 4 is sequentially connected to the cast head 1 and the first core rod 5, and the lock cap 3 is connected to the upper end of the shrink claw 4, and the cast head 1 is passed through the first shear. Nail 2 connection lock cap 3; the throttle includes at least the salvage 6, the mandrel 7, the mounted pendulum 8, the first block 9, the positioning ring 10, the ferrule 11, the ferric 13, the second shear nail 14, The cone 15, the second ring 16, the connection section 17, the universal claw 18, the support body 19, the rubber 20, the core 21, the second core rod 22, the cylinder segment 23, the nozzle 24, the nozzle seat 25, Effect 26 and the sand cover 27, the co...

Embodiment 3

[0030]Such asfigure 1 As shown, on the basis of Example 2, the throttle further includes a positioning sleeve 12, and the positioning sleeve 12 is attached to the mandrel 7 and the positioning sleeve 12 is located between the positioning ring 10 and the cone 15. The positioning sleeve 12 does not move the positioning ring 10 to avoid the Kava 13 can't be opened.

[0031]The sauce 13 is 3 sheets, and 3 flavors 13 weeks are distributed. Make sure that the TA 13 is fully anchored and fully locked, and the structure is simple.

[0032]The outer side of the mandrel 7 is a step. The steps of the step shaft 7 have the step of steps, so that when the paws of the cone 15 lose the support, the contraction is realized, and the result of shrinkage causes the ferroviation 13, and the support is reached, and the ferrous 13 and the inner wall of the ferric 13 and the tube column are released. Contact and is easy to unlock.

[0033]Such asFigure 5 As shown, the structure of the first stop ring 9 and the sec...

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PUM

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Abstract

The invention belongs to the technical field of downhole tools for throttling and reducing pressure of high-pressure natural gas in the production of natural gas wells, and in particular relates to an easy-to-salvage slip type downhole choke, including a delivery tool and a choke, and the choke is connected under the delivery tool , the delivery tool at least includes the delivery head, the first shear nail, the lock cap, the retraction claw and the first mandrel, and the restrictor at least includes the salvage neck, the mandrel, the slip hanger, the first retaining ring, the positioning ring, and the slip hoop , slips, second shear nail, cone, second retaining ring, connecting section, unsealing claw, support body, rubber tube, core tube, second core rod, cylinder section, air nozzle, air nozzle seat, pressure cap And the sand-proof cover, which solves the problems of the existing downhole choke, such as slips biting the oil pipe during fishing, which leads to difficult jamming, and the sealing rubber tube cannot be retracted, resulting in high frictional resistance when lifting, and the overall fishing success rate of the final tool is low. When the downhole choke is invented for fishing, the slips are easy to release, the sealing rubber tube is easy to retract, and the overall fishing success rate of the tool is high.

Description

Technical field[0001]The present invention belongs to the well-off tool technology for high-pressure natural gas in natural gas well production, and specific to a fans of the fans of the karvile underground throttle.Background technique[0002]In the natural gas mining, in order to step down, throttling, uniform, often in the air well well in the well well, the downhole throttle is divided into a separately discharged underground throttle and the preset downhole. . Preset Underflower Sitting Anchor is anchored to a preset working tube that is attached to the well with the production tube together with the production tube. Kapa-well underground throttractor sitting is anchored in any position in the production pipe column. Kada-type underground throttle is widely used in the Suli gas field due to its location of the seat. Through large-area promotion applications, there is a karma biting a dead oil pipe in the downhill, and the sealed rubber can not be retracted caused a large-scale im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B34/06E21B43/12E21B31/00
CPCE21B31/005E21B34/06E21B43/12
Inventor 桂捷杨旭东刘双全汪雄雄肖述琴卫亚明陈勇
Owner PETROCHINA CO LTD
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