CN217925816U - Clamping type downhole choke - Google Patents

Abstract

The utility model discloses a card fixed underground throttle ware, belong to oil development equipment technical field, the tip coaxial coupling of jack catch cover has the adapter sleeve, the inside deblocking axle sleeve that is provided with of adapter sleeve, the outside coaxial pressure cap that is provided with of deblocking axle sleeve, coaxial coupling has the deblocking floral tube on the pressure cap, the deblocking axle sleeve passes through deblocking pin joint with the deblocking floral tube, the tip of deblocking floral tube is provided with the fender ring, keep off the inside piston sleeve that is provided with of ring, the tip slidable mounting of piston sleeve is in the inside of cylinder, the inside of piston sleeve is provided with well core rod, well core rod slidable mounting is in the inside of piston sleeve, well core rod's tip fixed mounting is on the cylinder body bottom surface, the outside cover of piston sleeve is equipped with sealed section of thick bamboo, the inside deblocking claw that is provided with of deblocking floral tube, the inside of deblocking claw is provided with unidirectional mechanism, unidirectional mechanism is used for realizing controlling the unidirectional sliding of piston sleeve, and then guarantee good sealed effect.

Description

Clamping type downhole choke

Technical Field

The utility model relates to an oil development equipment technical field, in particular to stuck type is choke holder in pit.

Background

In order to adapt to the development of each large oil field, the underground throttling technology is researched and developed as a key technology according to the well conditions of different geographical environments of different blocks of each oil field, and the underground throttling device has various types and can be mainly divided into two types: movable type and stationary type. The movable underground throttler can be lowered into any well section position as required, the setting position is adjustable, the throwing and fishing operation is convenient and reliable, and the movable underground throttler is particularly suitable for old wells needing throttling. The down-entering position of the fixed underground throttler is determined by the position of the underground working barrel, the pressure difference is high, the sealing effect is good, the throwing and fishing operation is simple and reliable, and the fixed underground throttler is suitable for being used in a new production well.

The fixed type underground throttler is basically sealed by utilizing underground high pressure, and in the operation process, the sealing state can also change along with the change of underground pressure, so that the sealing function of the throttler is influenced. The gas well flow can be adjusted corresponding to different apertures through the rotating matching of the first valve core and the second valve core in the rotating process of the switch valve rod, and when the throttler needs to be closed, only the plugging part of the first valve core needs to be rotated to the through hole of the second valve core. The technical problem that this prior art solved is that the case switches over, can not solve the above-mentioned sealed stable and fixed not good problem of effect that exists.

SUMMERY OF THE UTILITY MODEL

To the above technical problem, the utility model discloses a technical scheme does: the utility model provides a card fixed downhole choke ware, includes the jack catch cover, the tip coaxial coupling of jack catch cover have the adapter sleeve, the inside deblocking axle sleeve that is provided with of adapter sleeve, the outside coaxial pressure cap that is provided with of deblocking axle sleeve, the pressure cap on coaxial coupling have the deblocking floral tube, the deblocking axle sleeve passes through deblocking pin joint with the deblocking floral tube, the tip of deblocking floral tube be provided with the fender ring, the inside piston sleeve that is provided with of fender ring, the tip slidable mounting of piston sleeve in the inside of cylinder, the inside of piston sleeve be provided with well core rod, well core rod slidable mounting is in the inside of piston sleeve, well core rod's tip fixed mounting is on the cylinder body bottom surface, the outside cover of piston sleeve be equipped with a sealed section of thick bamboo, the inside of deblocking floral tube be provided with the deblocking claw, the inside of deblocking claw be provided with unidirectional mechanism, unidirectional mechanism be used for realizing controlling the unidirectional sliding of piston sleeve.

Further, the circumference of jack catch cover on be provided with a plurality of location jack catches, the location jack catch be used for with the throttle card between two adjacent oil pipes, two adjacent oil pipes pass through the oil pipe coupling and realize connecting, the tip of jack catch cover be provided with spacing jump ring, inside the being provided with of jack catch cover card fixed pole, go up and be provided with spacing draw-in groove on the card fixed pole, spacing jump ring realize the location to last card fixed pole through spacing draw-in groove, the tip of going up card fixed pole be provided with salvage the head, the inboard of going up card fixed pole tip install through the input pin and deliver the head, the tip of location jack catch is provided with the jack catch cover, the jack catch cover is used for keeping the location jack catch in the state of packing up.

Furthermore, the connecting sleeve on be connected with card ball cover through the seat pin, well core rod on be provided with card steel column groove, the deblocking axle sleeve on be provided with card steel column groove complex through-hole, card steel column groove and deblocking axle sleeve on the through-hole intercommunication, be provided with the location steel ball in the space of formation.

Furthermore, the one-way mechanism comprises a one-way thorn ring and a centering sleeve, the one-way thorn ring is coaxially arranged on the outer side of the central rod, an axial opening is formed in the one-way thorn ring, ratchets are arranged on the inner ring of the one-way thorn ring, the direction of the ratchets inside the one-way thorn ring is close to the ground, a tooth-shaped structure matched with the central rod is arranged on a shaft section matched with the central rod and the one-way thorn ring, the centering sleeve is arranged on the outer side of the one-way thorn ring, and the centering sleeve is used for centering the one-way thorn ring.

Furthermore, the one-way mechanism include cutting ferrule and right the cover, right the cover setting in the outside of cutting ferrule, the inside circumference of cutting ferrule on be provided with a plurality of mounting holes, the inside location ball that is provided with of mounting hole, location ball and mounting hole bottom between be provided with the spring, well core rod and cutting ferrule complex shaft section on be provided with a plurality of draw-in grooves, the both sides of draw-in groove set up to inclined plane and straight face respectively, the inclined plane setting on the draw-in groove is at the relative cutting ferrule sliding direction's of well core rod rear.

Further, cylinder and cylinder body underrun pin joint, the cylinder body bottom surface on be provided with the sand control cover, the sand control cover on install the pillar, pillar inside filter screen and the inner frame of having set gradually, the tip of pillar, filter screen and inner frame be provided with down the end cap.

Furthermore, sealing rings are arranged between the central rod and the bottom surface of the cylinder body, between the bottom surface of the cylinder body and the cylinder barrel, between the cylinder barrel and the piston sleeve, and between the central rod and the piston sleeve.

Furthermore, the sealing cylinder is made of rubber.

Compared with the prior art, the utility model beneficial effect be: the utility model realizes the control of the unidirectional movement of the central rod by arranging the unidirectional mechanism on the central rod, fixes the central rod at the position with the maximum displacement relative to the unidirectional mechanism, ensures that the sealing cylinder is always subjected to the same axial pressing force, and ensures the sealing quality; simultaneously the utility model discloses a fixed mode of toothless jack catch, the tubing coupling clearance location between the make full use of oil pipe sets up the unfreezing mode to hitting on, and the instrument drops the shaft bottom when avoiding operating, reduces the unfreezing degree of difficulty.

Drawings

Fig. 1 is a schematic structural diagram of a first portion of a stuck downhole choke of the present invention.

Fig. 2 is a schematic structural diagram of a second portion of the stuck downhole choke connected to the first portion of the present invention.

Fig. 3 is a schematic structural diagram of a third portion of the stuck downhole choke of the present invention connected to the second portion.

Fig. 4 is an enlarged view of a part of a structure a in fig. 3 according to the present invention.

Fig. 5 is a schematic structural diagram of a fourth part of the stuck downhole choke of the present invention connected to the third part.

Fig. 6 is a schematic structural view of the present invention including another one-way mechanism.

Fig. 7 is an enlarged schematic view of a portion of the structure at B in fig. 6 according to the present invention.

Fig. 8 is an enlarged view of a portion of the structure at C in fig. 7 according to the present invention.

Reference numbers: 1-an oil pipe; 2-a delivery head; 3-fishing the head; 4, putting pins; 5-fixing the upper clamping rod; 6-limiting clamping groove; 7-limiting clamp spring; 8, positioning a clamping jaw; 9-tubing coupling; 10-locking a spring shaft; 11-a jaw sleeve; 12-a ball clamping sleeve; 13-connecting sleeves; 14-pressing the cap; 15-unsealing the shaft sleeve; 16-unsealing the perforated pipe; 17-deblocking jaws; 18-a piston sleeve; 19-a baffle ring; 20-sealing the cylinder; 21-a central rod; 22-a cylinder barrel; 23-unsealing the pin; 24-clamping a steel column groove; 25-seating a pin; 26-a one-way ratchet ring; 27-a righting sleeve; 28-cylinder bottom; 29-a sand control cover; 30-protecting the pipe; 31-a filter screen; 32-an endoskeleton; 33-lower plug; 34-a card slot; 35-cutting ferrule; 36-mounting holes; 37-a positioning ball; 38-spring.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Wherein the showings are for the purpose of illustration only and not for the purpose of limiting the same, the same is shown by way of illustration only and not in the form of limitation; for a better explanation of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example (b): as shown in fig. 1-8, a clamping type downhole choke holder comprises a delivery head 2, a fishing head 3, a delivery pin 4, an upper clamping rod 5, a limiting clamping groove 6, a limiting clamp spring 7, a positioning clamp 8, a clamping spring shaft 10, a clamp sleeve 11, a clamp ball sleeve 12, a connecting sleeve 13, a pressing cap 14, a deblocking sleeve 15, a deblocking perforated pipe 16, a deblocking claw 17, a piston sleeve 18, a baffle ring 19, a sealing cylinder 20, a central rod 21, a cylinder barrel 22, a fishing head 3, a deblocking pin 23, a clamping steel column groove 24, a seating pin 25, a cylinder body bottom surface 28, a sand prevention cover 29, a protection pipe 30, a filter screen 31, an inner framework 32, a lower plug 33 and a one-way mechanism; this card formula is placed at oil pipe inside use in the pit, be provided with a plurality of location jack catchs 8 on the circumference of jack catch cover 11, location jack catch 8 is used for fixing the throttle between two adjacent oil pipe 1, two adjacent oil pipe 1 realize connecting through tubing coupling 9, the tip of jack catch cover 11 is provided with spacing jump ring 7, jack catch cover 11 is inside to be provided with clamping rod 5, be provided with spacing draw-in groove 6 on going up clamping rod 5, spacing jump ring 7 realizes the location to last clamping rod 5 through spacing draw-in groove 6, the tip of going up clamping rod 5 is provided with salvages head 3, the inboard of going up clamping rod 5 tip is installed through throwing in pin 4 and is delivered head 2, the tip of location jack catch 8 is provided with jack catch cover 11, jack catch cover 11 is used for keeping location jack catch 8 in packing up the state.

As shown in fig. 3, a connecting sleeve 13 is coaxially connected to an end of the jaw sleeve 11, an unsealing sleeve 15 is arranged inside the connecting sleeve 13, a pressing cap 14 is coaxially arranged outside the unsealing sleeve 15, an unsealing sleeve 16 is coaxially connected to the pressing cap 14, the pressing cap 14 is fixedly connected to the unsealing sleeve 16, the unsealing sleeve 15 is connected to the unsealing sleeve 16 through an unsealing pin 23, a stopper ring 19 is arranged at an end of the unsealing sleeve 16, a piston sleeve 18 is arranged inside the stopper ring 19, an end of the piston sleeve 18 is slidably mounted inside a cylinder 22, a central rod 21 is arranged inside the piston sleeve 18, the central rod 21 is slidably mounted inside the piston sleeve 18, an end of the central rod 21 is fixedly mounted on a bottom surface 28 of the cylinder, a sealing sleeve 20 is sleeved outside the piston sleeve 18, the sealing sleeve 20 is made of rubber, the sealing sleeve 20 is used for sealing the oil pipe 1, an unsealing claw 17 is arranged inside the unsealing sleeve 16, a one-way mechanism is arranged inside the unsealing claw 17, the one-way mechanism is used for controlling one-way sliding of the piston sleeve 18, and the purpose of the one-way mechanism is to ensure that a sealing state of the sealing sleeve 20 is not changed.

As shown in fig. 3 and 5, the connecting sleeve 13 is connected with a ball clamping sleeve 12 through a seat pin 25, a central rod 21 is provided with a clamping steel column groove 24, a deblocking sleeve 15 is provided with a through hole matched with the clamping steel column groove 24, the clamping steel column groove 24 is communicated with the through hole on the deblocking sleeve 15, a positioning steel ball is arranged in a formed space, the positioning steel ball clamps the deblocking sleeve 15 and the central rod 21 under the action of the ball clamping sleeve 12, the cylinder 22 is connected with the cylinder bottom 28 through a pin, the cylinder bottom 28 is provided with a sand prevention cover 29, the sand prevention cover 29 is provided with a protection pipe 30, the protection pipe 30 is internally provided with a filter screen 31 and an inner framework 32 in sequence, the ends of the protection pipe 30, the filter screen 31 and the inner framework 32 are provided with lower plugs 33, and sealing rings are arranged between the central rod 21 and the cylinder bottom 28, between the cylinder bottom 28 and the cylinder 22, between the cylinder 22 and the piston sleeve 18, and between the central rod 21 and the piston sleeve 18.

The utility model discloses a stuck type downhole choke's theory of operation does: during the use, transfer the choke holder to suitable position in the pit through this instrument cluster, then hit and deliver head 2, go up clamping rod 5 and cut off this moment, go up clamping rod 5 and move down in the inside of jack catch cover 11, prop open a plurality of location jack catches 8 that set up on the jack catch cover 11 circumference in the in-process that moves down, location jack catch 8 blocks under the effect of last clamping rod 5 between two oil pipe 1, accomplishes the card of choke holder this moment.

The delivery head 2 is continuously hit downwards, the ball clamping sleeve 12 is driven to slide between the connecting sleeve 13 and the deblocking sleeve 15 under the action of the upper blocking rod 5, the limit of a steel column in the blocking steel column groove 24 is relieved in the sliding process of the ball clamping sleeve 12, at the moment, the limit between the central rod 21 and the deblocking sleeve 15 disappears, the bottom surface 28 of the cylinder body is pushed to move upwards under the high-pressure action of underground oil gas, the bottom surface 28 of the cylinder body drives the cylinder barrel 22 to move upwards, the cylinder barrel 22 applies axial extrusion force to the sealing barrel 20, and the oil pipe 1 is sealed.

The cavity formed by the cylinder 22, the central rod 21 and the piston sleeve 18 is in a low-pressure state relative to the external environment, therefore, in the process that the cylinder 22 presses the sealing cylinder 20, the internal space formed by the cylinder 22, the central rod 21 and the piston sleeve 18 is pressed, at the moment, the piston sleeve 18 moves towards the direction close to the bottom surface 28 of the cylinder body, the central rod 21 moves upwards along with the cylinder 22, and the one-way mechanism locks the central rod 21 at the position with the maximum displacement, so that the sealing of the sealing cylinder 20 on the oil pipe 1 is prevented from being influenced by the change of the underground air pressure.

The utility model discloses a two kinds of one-way mechanisms:

the first structure is as follows: as shown in fig. 4, the unidirectional mechanism includes a unidirectional ratchet ring 26 and a centering sleeve 27, the unidirectional ratchet ring 26 is coaxially disposed outside the central rod 21, an axial opening is disposed on the unidirectional ratchet ring 26, ratchets are disposed on an inner ring of the central rod 21, the direction of the ratchets inside the central rod 21 is a direction close to the ground, a tooth-shaped structure matched with the central rod 21 is disposed on a shaft section of the central rod 21 matched with the unidirectional ratchet ring 26, the centering sleeve 27 is disposed outside the unidirectional ratchet ring 26, the centering sleeve 27 is used for centering the unidirectional ratchet ring 26, the unidirectional ratchet ring 26 is limited under the action of the release pawl 17, the central rod 21 can only move upward relative to the unidirectional ratchet ring 26 under the action of the ratchets, and therefore it is ensured that the sealing barrel 20 always bears the maximum extrusion force, and the sealing effect is ensured.

The second structure is as follows: as shown in fig. 6, 7, and 8, the one-way mechanism includes a ferrule 35 and a centering sleeve 27, the centering sleeve 27 is disposed at an outer side of the ferrule 35, a plurality of mounting holes 36 are disposed on a circumference inside the ferrule 35, a positioning ball 37 is disposed inside the mounting hole 36, a spring 38 is disposed between the positioning ball 37 and a bottom of the mounting hole 36, a plurality of slots 34 are disposed on a shaft section where the central rod 21 is engaged with the ferrule 35, two sides of the slots 34 are respectively disposed as an inclined surface and a straight surface, the inclined surface on the slots 34 is disposed behind the sliding direction of the central rod 21 relative to the ferrule 35, the central rod 21 slides upward relative to the ferrule 35, when the slots 34 are aligned with the mounting holes 36, the positioning ball 37 pops out from the one-way ratchet ring 26 under the action of the spring 38 and enters the slots 34, the ferrule having the inclined surface and the straight surface on the slots 34 is used to ensure that the central rod 21 can only move upward relative to the ferrule 35, and can be locked when moving in a reverse direction, thereby achieving an effect of ensuring sealing performance.

When the throttler needs to be taken out, the clamping rod 5 is lifted, the positioning clamping jaws 8 on the clamping jaw sleeves 11 lose support and rebound from a gap between two adjacent oil pipes 1, at the moment, releasing is achieved, the clamping rod 5 is continuously lifted, the upper clamping rod 5 drives the clamping jaw sleeves 11 to ascend, the connecting sleeves 13 and the deblocking sleeve 15 are fixedly connected, the clamping jaw sleeves 11 together with the connecting sleeves 13 and the deblocking sleeve 15 are lifted, at the moment, the deblocking pin 23 used for connecting the deblocking sleeve 15 and the deblocking pipe 16 is cut off, the deblocking sleeve 15 slides upwards in the deblocking pipe 16 to be attached to the pressing cap 14, the releasing jaws 17 are unlocked, at the same time, the retaining ring 19 is driven to move upwards, at the moment, the upper end of the sealing barrel 20 is not stressed to recover elastic deformation, sealing is failed, steel wires are lifted, and fishing of the throttler is achieved.

The present invention is not limited to the above embodiments, and the skilled in the art can make various changes without creative labor, and all the changes fall within the protection scope of the present invention.

Claims (8)

1. A stuck-type downhole choke, characterized in that: including jack catch sleeve (11), the tip coaxial coupling of jack catch sleeve (11) have adapter sleeve (13), adapter sleeve (13) inside be provided with deblocking axle sleeve (15), deblocking axle sleeve (15) outside coaxial being provided with press cap (14), press cap (14) on coaxial coupling have deblocking floral tube (16), deblocking axle sleeve (15) are connected through deblocking pin (23) with deblocking floral tube (16), the tip of deblocking floral tube (16) be provided with fender ring (19), fender ring (19) inside be provided with piston sleeve (18), the tip slidable mounting of piston sleeve (18) in the inside of cylinder barrel (22), the inside of piston sleeve (18) be provided with well core rod (21), well core rod (21) slidable mounting is in the inside of piston sleeve (18), the tip fixed mounting of well core rod (21) is on cylinder body bottom surface (28), the outside cover of piston sleeve (18) be equipped with sealed barrel (20), inside be provided with well deblocking floral tube (16) one-way pawl (17), the inside be provided with piston pawl (17) the slip control mechanism of deblocking pawl (17) be used for the one-way slip control mechanism of piston sleeve (18).

2. The stuck downhole choke of claim 1, wherein: the circumference of jack catch cover (11) on be provided with a plurality of location jack catch (8), location jack catch (8) be used for fixing the throttle between two adjacent oil pipe (1), two adjacent oil pipe (1) realize connecting through oil pipe coupling (9), the tip of jack catch cover (11) be provided with spacing jump ring (7), jack catch cover (11) inside be provided with card fixed pole (5), go up and be provided with spacing draw-in groove (6) on card fixed pole (5), spacing jump ring (7) realize the location to last card fixed pole (5) through spacing draw-in groove (6), the tip of last card fixed pole (5) be provided with salvage head (3), the inboard of going up card fixed pole (5) tip install delivery head (2) through throwing in pin (4), the tip of location jack catch (8) is provided with jack catch cover (11), jack catch cover (11) are used for keeping location jack catch (8) in the card locking state.

3. The stuck downhole choke of claim 1, wherein: adapter sleeve (13) on be connected with card ball cover (12) through seat seal pin (25), well core rod (21) on be provided with card circular steel post groove (24), deblocking axle sleeve (15) on be provided with card circular steel post groove (24) complex through-hole, card circular steel post groove (24) and deblocking axle sleeve (15) on the through-hole intercommunication, be provided with the location steel ball in the space of formation.

4. The stuck downhole choke of claim 1, wherein: the unidirectional mechanism comprises a unidirectional spine ring (26) and a centering sleeve (27), the unidirectional spine ring (26) is coaxially arranged on the outer side of the central rod (21), an axial opening is formed in the unidirectional spine ring (26), ratchets are arranged on the inner ring of the unidirectional spine ring (26), the direction of the ratchets in the unidirectional spine ring (26) is close to the ground, a tooth-shaped structure matched with the central rod (21) is arranged on a shaft section of the central rod (21) matched with the unidirectional spine ring (26), the centering sleeve (27) is arranged on the outer side of the unidirectional spine ring (26), and the centering sleeve (27) is used for centering the unidirectional spine ring (26).

5. The stuck downhole choke of claim 1, wherein: the one-way mechanism comprises a clamping sleeve (35) and a centering sleeve (27), the centering sleeve (27) is arranged on the outer side of the clamping sleeve (35), a plurality of mounting holes (36) are formed in the circumference of the inner portion of the clamping sleeve (35), positioning balls (37) are arranged in the mounting holes (36), springs (38) are arranged between the positioning balls (37) and the bottoms of the mounting holes (36), a plurality of clamping grooves (34) are formed in the shaft section, matched with the clamping sleeve (35), of the central rod (21), two sides of each clamping groove (34) are respectively provided with an inclined surface and a straight surface, and the inclined surfaces on the clamping grooves (34) are arranged behind the sliding direction, relative to the clamping sleeve (35), of the central rod (21).

6. The stuck downhole choke of claim 1, wherein: cylinder (22) and cylinder body bottom surface (28) pass through pin joint, cylinder body bottom surface (28) on be provided with sand control cover (29), sand control cover (29) on install pillar (30), pillar (30) inside filter screen (31) and inner frame (32) of having set gradually, the tip of pillar (30), filter screen (31) and inner frame (32) be provided with down end cap (33).

7. The stuck downhole choke of claim 1, wherein: and sealing rings are arranged between the central rod (21) and the bottom surface (28) of the cylinder body, between the bottom surface (28) of the cylinder body and the cylinder barrel (22), between the cylinder barrel (22) and the piston sleeve (18) and between the central rod (21) and the piston sleeve (18).

8. The stuck downhole choke of claim 1, wherein: the sealing cylinder (20) is made of rubber.

Images