Packer technology

 

The invention relates to the oil and gas industry, namely patrolsim devices, and can be used in the repair of wells. The technical result is increased reliability of operation of the packer. Packer technology contains a barrel with a Central channel, cone, cuff, clip with dice, fixed shear element of the lower piston, podpornega cavity which is connected with the Central bore, the upper and lower couplings, emphasis and shear valve connected with the lower part of the barrel, the locking movement of the dies and the deformation of the cuff, a threaded sleeve mounted on the barrel, Cabinet sleeve mounted coaxially on the screw sleeve and connected with it by the upper spring ring. Threaded sleeve fitted top piston and slots in its upper part, the upper clutch made reciprocal longitudinal grooves under the slots. The cone is set lower snap ring, and in the lower part of the Cabinet sleeves are made response annular groove in the lower snap ring. 1 C.p. f-crystals, 1 Il.

The invention relates to the oil and gas industry, namely patrolsim devices, and can be COI is performance communications elements, thrust ring and cone, provided with a shank and forming with the barrel of the camera associated with the cavity of the barrel, die and rigidly associated with thrust ring holder with Windows to host dies (and.with. SU # 800339, E 21 33/12, op. 1981) (1).

The disadvantage of this packer is the low reliability of the packer, so when pressure inside the packer simultaneously with the movement of the dies are compressed sealing elements, which when moving the tubing with the packer down, damaged about casing. Moreover, in the absence of locking movement of the dies and sealing elements after installation of the packer can move dice and sealing elements, which can lead to depressurization of the packer. In addition, the packer is of limited use due to the overlap of the Central channel sbresny ball, and also in a known packer there is no mechanism in the released compression of the sealing elements and dice.

The closest in technical essence and the achieved result of the claimed packer technology is a packer of the type MO-AGM containing barrel cuff, cones, clip strips, piston, clutch, stop and shear valve. (E. I. She, C. E. She. The equipment and in the spine of the work, because the lack of tabs when creating a working pressure in the well can change the position of the packer relative to the casing and to razgermetiziruetsya cuff. Re-recording of the packer and sealing cuff cannot be created because of the cut of the pins securing the saddle on the body, and loss of seat and ball valve.

In addition, removal of the packer after a long time by a direct pull lifting columns of tubes is problematic and time consuming. In this case, as a rule, goes down cuff.

The present invention is to improve the reliability of operation of the packer.

The essence of the present invention is that known packer technological containing barrel with a Central channel, cone, cuff, clip with dice, fixed shear element of the lower piston, podpornega cavity which is connected with the Central bore, the upper and lower couplings, emphasis and shear valve connected with the lower part of the trunk, according to the invention, further comprises a locking movement of the dies and the deformation of the cuff, a threaded sleeve mounted on the barrel, Cabinet sleeve mounted coaxially on resem and slots in its upper part, in the upper clutch made reciprocal longitudinal grooves under the slots in the cone is set lower snap ring, and in the lower part of the Cabinet sleeves are made response annular groove in the lower snap ring, and a threaded sleeve connected with the barrel by using left-hand threads.

The drawing shows the proposed packer in technological terms. Packer technology includes a barrel 1 with a Central axial channel, the lower piston 2 mounted on the shaft 1 and fixed shear screw 3 relative to the lower cylinder 4, the lower clutch 5, the clip from the dies 6, the cone 7, the cuff 8, the stop 9, the tabs 10 movements of the dies 6 and deformation of the cuff 8, shear screw 11, the shear valve 12 with the saddle under the discharge element connected to the lower part of the packer, the threaded sleeve 13, the upper cylinder with the clamp 14, the upper snap ring 15, the lower snap ring 16, the housing sleeve 17, made with the ledge under the cone 7, the sealing ring 18, the upper clutch 19, and a threaded sleeve 13 mounted on the shaft on the left of the thread 20 in its upper part is equipped with slots 21 within the slots 22 in the top of the clutch 19, under the lower piston 2 is made podpornega chamber 23 connected by a radial channel 24 with a Central Kahn is the top of the upper piston 25, on the inner surface of the cone 7 is made a groove 26 beneath the lower snap ring 16, and the outer surface of the threaded sleeve 17, at the bottom it made a return groove 28. Packer technology works as follows. Packer put the pipe into the borehole to a predetermined depth. To install the liner into the pipe from the wellhead dropping the ball, which falls into the saddle shear valve 12 and blocks its flow cross-section. Inside the tube creates a pressure, which is transmitted through the channel 24 on the piston 2, and when the limit pressure is cutting screw 3, the piston 2 moving up, approaching the clip with 6 dice on a cone 7. In this case, the die 6 receive radial movement prior to their introduction into the production casing. Moving plates 6 fixed lower retainer 10. To achieve the design pressure inside the tubes is cutting pins shear valve 12 and the ball together with the saddle falls on the face. If necessary, below the packer can be set a trap for the ball and seat shear valve 12, which can be retrieved.

To divide the space above and below the packer produce unloading the tubing at the packer. In this case, the packer is based on the production casing is the first packer and the column. When this occurs, the recording of the compressed cuff 8 upper retainer movements 10.

After setting the packer can be carried out engineering works (pumping, washing, fracturing etc.)

Removing the packer produce rotation to the right clockwise the tubing at the wellhead. Thus there is a cutting of the screw 11, the rotation of the upper clutch 19 together through a splined connection (slots 20 in response grooves 21 with the threaded sleeve 13. In the threaded sleeve 13 rotates on the left thread 20 of the barrel 1 moves up. At the same time also moves up corpus sleeve 17 carried by a threaded sleeve 13 through a spring ring 15, and the piston 25, located on the threaded sleeve 13 moves in a cylinder 14 that seals the internal cavity of the packer relative to the external pressure drops.

After displacements Cabinet bushing with collar 17 on 20-30 mm clamp moves the top 10 and the stop 9 is released the cuff 8 from the compression status for the specified amount of movement.

Subsequent rotation to the right moves the threaded sleeve 13 with the carcass sleeve 17 upward, the annular groove 27 of the sleeve 17 is combined with the annular groove 26 of the cone 7. Snap ring bottom 16 f is Subsequent rasagiline columns together with the retainer in the direction of up-down easily for a short time provides the return of the dies 6 and sleeve 8 in its original position and secure removal and retrieval of the packer.

Declare packer technology allows for reliable installation, trouble-free removal, and removing it from the well for a short time.

Claims

1. Packer technological containing barrel with a Central channel, cone, cuff, clip with dice, fixed shear element of the lower piston, podpornega cavity which is connected with the Central bore, the upper and lower couplings, emphasis and shear valve connected with the lower part of the barrel, characterized in that it further comprises a locking movement of the dies and the deformation of the cuff, a threaded sleeve mounted on the barrel, Cabinet sleeve mounted coaxially on the screw sleeve and connected with it by the upper spring ring, with threaded sleeve fitted top piston and slots in its upper part, in the upper clutch made reciprocal longitudinal grooves under the slots in the cone is set lower snap ring, and in the lower part of the Cabinet sleeves are made response annular groove in the lower snap ring.

2. Packer under item 1, characterized in that the threaded sleeve is connected with the barrel by using left-hand threads.



 

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Packer // 2236555
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Packer unsupported // 2236553
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Packer // 2245986

FIELD: oil and gas extractive industry.

SUBSTANCE: packer has body in form of pipe, whereon collar compactors are placed with limiting washers, saddles for locking tool dropped from surface, cover, upper and lower fixing elements, made in form of anchoring assemblies, upper conical bushing, rigidly connected to pressing bushing and movably to the body, lower conic bushing, made rigidly together with body, guide of this conic bushing made in form of plate spring, placed by one end moveably in guiding groove in lower portion of lower die with teeth, and by other end fixed rigidly on greater diameter of this conic bushing, auxiliary pipe, placed inside the body. Packer in lower portion is provided with check valve, placed inside recess of body, concurrently being also the body of valve. Oppositely to valve saddle on same axis stepped locking bushing is placed with possible sliding inside body recess with limited drive and possible overlapping of radial grooves made in body, which, in its turn, is rigidly connected to auxiliary pipe via shear pin. Between stepped locking bushing and saddle compression spring is placed. Fixing elements of collar compactors are made in form of comb with inner teeth and outer conic generators in nose portion. On the side of collar compactors these are enveloped by inner conic portion of compression bushing, in its turn rigidly connected to upper conic bushing, and on the other side combs with inner teeth are placed sliding-moveably in radial grooves of guiding bushing placed between ends of upper conic bushing and inner conic portion of compression bushing with possible engagement by inner teeth of comb to slanting walls of body groove and interaction to all elements of this assembly.

EFFECT: higher reliability.

5 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: system has upper and lower packers, each of which has body, shaft, anchor, compactors, and pipes, placed between packers. In shaft of upper packer a copier is made with fixing device of transporting and working position of anchor and a sub. The latter is mounted with possible axial displacement and rotation around the copier. Sub is placed on pipes between packers, mated to lower packer and has no capability for axial rotation and displacement relatively to their axis in operating position of lower packer. On lower packer shaft a copier is made with possible axial displacement with it for interaction with anchor and its displacement from transporting position to operation position.

EFFECT: simplified construction, broader functional capabilities.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: stand has imitators of casing and lifting columns with packer between them, means for heating casing column imitator, main hydraulic cylinder for axial loading and unloading of packer, pumps to create pressure. Stand is provided with additional hydraulic cylinder with hollow rod and cylinder, connected to rod of min hydraulic cylinder. Additional hydraulic cylinder is encased in the body, rigidly connected to main hydraulic cylinder and imitator of casing column. In additional hydraulic cylinder a ring-shaped piston is placed with conical skirt, interacting with keys with possible periodical supporting against the body through windows in said cylinder and below keys spring-loaded ring-shaped pusher is moveably mounted. In hollow of imitator of lifting column a floating piston is positioned, this hollow and hollow of the hollow rod are interconnected and also connected to hollow above ring-shaped piston.

EFFECT: broader functional capabilities, higher efficiency.

7 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device includes hollow body with a row of vertical apertures, a collar, pusher bushing, placed on body with possible interaction with collar, cone, mounted on the body, cylinder, connected to cone, screw-thread dies with die holder, mounted on the body with possible extension of dies in radial direction during interaction with cone, saddle and shear screws. According to invention in die holder additional through radial apertures are made, wherein sockets are mounted with possible extension in radial direction. Inner hollow of die holder is connected to inner hollow of body by a row of radial apertures. In pusher bushing through radial apertures are made, wherein sockets are mounted with possible extension in radial direction. Pusher bushing is rigidly fixed to the body, and its inner hollow is connected to inter-tubular space below the collar.

EFFECT: higher reliability, durability and lower cost.

3 dwg

FIELD: oil industry.

SUBSTANCE: device has body with radial apertures, two compacting assemblies thereon and valve assembly between them. Each compacting assembly comprises a collar, stopping branch pipe, cylinder, forming a ring-shaped hollow with the body, wherein a bushing is placed. In upper compacting assembly ring-shaped hollow is covered by plug from lower side, which is fixed in cylinder and interacts with collar, cylinder is connected to body by cams, placed in radial apertures of plug and in ring groove of body, bushing is made stepped, long step of which interacts with cams and is fixed by shear screws from displacement in ring plane, which is connected to well. In lower compacting assembly bushing is provided with holder, on the body a cone is mounted, interacting with sockets, placed in grooves of stopping branch pipe, which is fixed on the body by shear screws.

EFFECT: higher reliability.

2 cl, 4 dwg

Two-packer device // 2249669

FIELD: oil and gas industry.

SUBSTANCE: device has shaft with radial channels and return valve, upper and lower compacting elements. Inside the shaft a hollow spring-loaded moving rod is placed. It has radial apertures and recesses. Between apertures a throttle is rigidly placed. On upper portion of rod a piston is placed. Working hollow, formed between rod with piston and barrel, fixed on inner portion of shaft, is connected to above-packer space of well by radial aperture, made in barrel wall. Working hollows of upper and lower compacting elements are connected by axial channel, made in shaft and ring channel, formed between inner and outer pipes, connecting lower compacting element to the shaft. On upper portion of pipe through radial apertures are made and cylindrical recess, matching rod diameter, in which rod a plug is place. Outer diameter of upper end portion of rod equals outer diameter of lower rod portion.

EFFECT: higher reliability.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: packer has body, in which electric engine, reducer with output shaft, connected to screw couple, which is connected to traction, having holding rods on lower portion with spring for transfer of axial force to central rod, having a shelf in upper portion as well as recess and cuts, and in inner portion - compacting rings and stopping nut, are positioned. Packer has shell, having conical surface on inner portion, special part with shelves, shear ring placed in grooves of said special part and holding segments, immobile bushing connected fixedly to special part. Packer has packer rubber, saddle, rigidly connected to special part, moveable flange and two cones, placed oppositely to each other, dies, moveably placed on cones, traction, jointly connected to dies, branch pipe, fixedly placed on body, moveable bushing, balls, pressed by spring and screw for connection of special part to shell, cable of rope, being a carrying cable and feeding electric engine via filament, shear washer, pressed by nut. When packer is removed, engaging assembly is utilized, which includes pusher, screwed on lower portion of screw couple screw, cut holder and cover. Through apertures are made on special part and moveable flange for connection of above-packer and below-packer well hollows.

EFFECT: lower costs and simplified maintenance.

6 dwg

Packer // 2251614

FIELD: oil production industry, particularly means for dividing an annular space and a tube space in flowing, gaslift, and beam wells.

SUBSTANCE: packer includes shaft with outer bored surface and bead and sealing members supported by the bead. Packer also has air cylinder forming annular cavity together with packer shaft. Cavity is connected with shaft interior through radial channels. Packer includes anchoring means. Lower anchoring means includes cone with slips and slip holder having bored inner orifice and threaded orifices. Lower anchoring means rests upon the bead and is connected to the shaft by shear screws installed in threaded orifices of slip holder. Shaft defines inner bored diameter and includes sliding bush located inside shaft. Shaft is provided with lower and upper grooves for sealing rings receiving and with outer grooves for cams and additional shear screws installation. Outer grooves are located between lower and upper ones. Slots are formed below bead on outer shaft surface for installing cams with limited radial travel. Threaded orifices are formed on outer shaft surface above inner groove thereof. Arranged into groove are additional shear screws to secure sliding bush in its initial position. The slip holder is freely installed on shaft or is spring-loaded. Support-moving bush is installed in inner bored orifice of slip holder between shear screws and cams. Support-moving bush is provided with facet formed from cam side and contacts with cams along mating facets upon shearing of shear screws. Free travel between cams and end of support-moving bush exceeds shear screw diameters to provide shearing thereof. When sliding bush is installed in fixed position cams extend above an outer shaft surface generator to provide displacement of support-moving bush and cut of shear screws. When sliding bush is located in operating position cams are located below outer shaft surface generator and move in radial direction into outer groove of sliding bush to provide free cam movement under support-moving bush and shear screws.

EFFECT: reduced number of lowering and lifting operations and breakdowns in the case or packer separation or during packer pulling out of well.

18 cl, 7 dwg

FIELD: oil and gas industry.

SUBSTANCE: device has body, made in form of branch pipe with elastic collar mounted on it, expanding assembly with cone, shear element, gear, lowered on pipes column into additional casing column and interacting with expanding assembly from above. Expanding element is positioned in upper portion of branch pipe and locked with its cone directed downwards, gear is made in form of pusher in lower portion and anchor assembly in upper portion. Pusher is made in form of hydraulic cylinder, made with possible pressure from above on expanding assembly and provided with piston and hollow rod, which is connected to piston rigidly, and to pipes column - hermetically with possible upward axial displacement. Anchor assembly is made in form of dies, mounted on hollow rod with possible radial movement outwards during movement of hollow rod upwards relatively to pipes column. Shear element holds hollow rod relatively to pipes column during lowering into well.

EFFECT: simplified construction, lower costs.

1 dwg

FIELD: mining industry.

SUBSTANCE: device has packer, mounting tool and anchor assembly. Packer expander is mounted in upper portion of body, and anchor assembly - above hydraulic chamber of mounting tool. Hydraulic chamber cylinder is mounted with possible displacement relatively to rod and hydraulically connected to inner space of device. Body of anchor assembly is provided with sockets, in which spring-loaded dies are mounted, which are activated by hydraulic effect formed in tubing pipes column, on which device is lowered into well.

EFFECT: simplified construction, higher reliability, higher efficiency.

1 dwg

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