Hydro-mechanic packer

FIELD: oil and gas production.

SUBSTANCE: invention can be implemented for pull-out of holes, for example for hydraulic break of beds (HBB) operated with one well. The hydro-mechanic packer lowered into a well on a flow string consists of a mandrel made in form of two pipes, of sealing elements with a hold-down device, of an upper anchor with a hydraulic drive, and of a lower anchor with a mechanic drive connected to each other with a bayonet joint. The bayonet joint consists of a bushing with slots located in the upper part of the packer; pins arranged on a bushing in the lower part of the packer come into the slots and interact with surfaces of the slots. Two shaped grooves set off at 180° relative to each other are made on side surface of the upper bushing; the upper part of grooves is conjugated with a cut. Unfolded pattern of each of grooves corresponds to working surface for directing the pin into the above said cut; working surface is situated at acute angle to plane of cross section conjugated with lengthwise cut. Its lower working surface is made at angle to plane of cross section of the packer equal to angle of friction of pair of metals interacting details are made out of; also the said angle is directed counter clockwise, if details of the packer are left sided.

EFFECT: improved operation characteristics.

1 cl, 4 dwg

 

The invention relates to borehole development and operation of multilayer deposits of hydrocarbons, in particular to the technology and technique of dual use several operating objects in the same well, and can be used to perform capital repair of wells, for example, to conduct hydraulic fracturing (fracking), operated in the same well.

Known packer hydromechanical (hereinafter packer) service "PS" series [1], consisting of a barrel, made in the form of two pipes connected to each other via a bayonet connection, sealing elements, two anchoring mechanisms and the adjusting device, resulting in the action of the sealing elements.

The drawback of this setting is to limit the field of application, because the design of the bayonet connection is not possible after the first failure of the packer to re-install it into the transport position to perform the re-planting of the next processing interval of the well. To reinstall it must be retrieved to the surface for installation of the adjusting device to its original position.

The aim of the invention is to provide a packer which, for example, as a component of the downhole downhole projectile would provide an opportunity interval is the processing of the reservoir without removing it to the surface, and thus would have a high reliability by eliminating inadvertent shutdown of sealing elements. All of these objectives involve providing multiple translations of the packer from the transport position into the working position and Vice versa.

The technical result to be obtained by the use of the invention is to expand the field of application in multilayer wells by providing the possibility of performing several operations in the well without lifting it to the surface. It also improves the reliability of the installation of the packer due to the exclusion of spontaneous shutdown of sealing elements. In addition to this reduced the complexity of the works and reduces the execution time of operations underground repair of wells.

This object is achieved due to the fact that the packer includes a barrel, sealing elements with pressure device, the upper anchor with a hydraulic drive, the lower the anchor with a mechanical drive connected to each other via a bayonet connection, consisting of located in the upper part of the packer sleeve with slits made with the possibility of placement and interaction with their surfaces toes, on the plug located at the bottom of the packer. On the side surface of the upper sleeve made two curly shifted about the relative each other by 180°, groove, the upper part of which involves neckline, scan each of the slots on the plane represents the surface for the direction of the finger in the notch located at an acute angle to the plane of the cross section mating with the longitudinal cut. The lower working surface of the longitudinal cut is made at an angle to the plane of the cross-section of the packer equal to the angle of friction pairs of metals, of which is made of interacting parts, and the said angle is oriented counterclockwise in the case of left-sided complete details of the packer.

The construction of the packer shown in figures 1, 2, 3 and 4. Figure 1 shows the top part of the design of the packer, figure 2 - middle part in figure 3 - bottom part. Figure 4 - scan bayonet connection of the packer.

The packer consists of a stem, to which the screw coupling, intended for connection with the column tubing on which it descends into the well.

In the upper part of the shaft 1 below the coupling 2 has a bypass 3. In the case of the bypass installed rubber ring 4.

Below is the valve body 5 in which is inserted the sleeve 6, the role of the balancing valve. The bottom of the valve body 5 is connected with a hydraulic anchor, consisting of a housing 7, which established eight plates 8 which are pressed to contact straps 9.

Lower the hydraulic anchor is sealing unit (2), which includes a housing 10, which is connected by threaded in its upper part, with hydraulic anchor. In the case of hydraulic anchor 7 has a calibration nut 11 and the lower housing 10 includes a calibration nut 12, between which are two rigid cuff 13, and between them is located a soft cuff 14, bounded on two sides of the spacer rings 15.

In the lower part of the packer (figure 3) is located landing site. It includes the case of the mechanical armature 16, which is installed spring-loaded friction of the strap 17, the fixed ring 18, which is tightened by threading the mount 19.

In the lower part of the mount 19 is made of the J-shaped grooves 20 (figure 4), are displaced relative to each other at 180°C, in which are located the tabs 21 located on the shank 22 and enables the installation of the packer in the working and transport position. The shank through the thread connected with the barrel 2 and is fixed from turning brakes.

The landing site is associated with the sealing site through a system of rods, made in the form of a housing 23, which is screwed into the top of the calibration nut 12, and the bottom is limited boarding cone 24 and holds the projecting collar of the pipe 25. At the bottom of the pipe 25 is screwed a nut 26 that limits the movement of the landing site.

Scan-side p is surface mount (figure 4) for packer left-hand execution is a deepening of a triangular shape, in the upper part of which has an aperture. This scan is also the form on the outer side surface of the mount 19, i.e. a view from the side of the outer normals.

When installing the packer finger latch 21 affects the surface 27 mount 19, resulting in the retainer mount is rotated around the axis as long as the finger latch will not get into the groove "28". After removal of the load, the finger remains in the neck and interacts with the surface 29, which is inclined to the plane of the cross-section at an angle equal to the angle of friction pair materials finger and the latch. Typically, these parts are manufactured from quality heat-treated steel, the coefficient of friction between them subject to the availability of lubrication (the process liquid in a water or oil based) is equal to k=0.1 to 0.15. Accordingly, the friction angle α is equal to α=arctan (k) and $ 5.5 to 8.5°. When this push mechanism acts on the sealing elements, converting them into position. When the execution of the packer in the right ispolnenii configuration of the slots has a mirrored version.

Packer works as follows.

Before setting the packer in the range of landing work on the cleaning of the walls of the well casing. The packer is lowered on the tubing pipes connected with what ofteu 2. Before installing the packer its lower part together with the fingers of the latch is in the down position. When this push mechanism sealing elements released, and they are in transport position.

Next include the upper hydraulic anchor by creating in the cavity tubing excess pressure and rotate the tubing string.

When installing the packer finger release affects the surface "27", resulting in the retainer mount is rotated around the axis as long as the finger latch will not get into the groove "28". After removal of the load, the finger remains in the neck and interacts with the surface 29, which is inclined to the plane of the cross-section at an angle equal to the angle of friction pair materials finger and the latch. When this occurs, the moving parts of the adjusting mechanism and the sealing elements move into position.

When disconnecting the packer upper portion is rotated relative to the bottom, finger latch slides on the surface "29" and leaves cut "28", then goes down along with screw-down mechanism, releasing the sealing elements (putting them in transport position).

Thus, the translation of the packer from the working position to transport position is accomplished with minimal force, on the one hand and eliminates omeprozole off the sealing element of the packer with the other hand. This condition is achieved if the angle of inclination of the working surface of the retainer equal to the angle of friction of a finger sliding on it.

The source of information

1. Packer hydromechanical service "PS"series. Technical conditions TU 3665-001-2007.

Packer hydromechanical for lowering into the well on a string of tubing comprising a barrel, made in the form of two pipes, sealing elements with pressure device, the upper anchor with a hydraulic drive, the lower the anchor with a mechanical drive connected to each other via a bayonet connection, consisting of located in the upper part of the packer sleeve with slits made with the possibility of placement and interaction with their fingers, located on the plug located in the lower part of the packer, wherein the side surface of the upper sleeve made two curly shifted relative to each other on 180°, the groove, the upper part of which involves neckline, scan each of the slots on the plane represents the surface for the direction of the finger in the notch located at an acute angle to the plane of the cross section mating with a longitudinal cut, the lower working surface of which is made at an angle to the plane of the cross-section of the packer equal to the angle of friction pairs of metals, from the which is made of interacting parts, moreover, the above-mentioned angle is oriented counterclockwise in the case of left-sided complete details of the packer.



 

Same patents:

FIELD: oil and gas production.

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1 dwg

Hydraulic packer // 2366798

FIELD: oil and gas production.

SUBSTANCE: hydraulic packer consists of a hollow mandrel, whereon there are secured an anchor with bowl slip sockets, spring-loaded in radial direction, and a shell forming circular cavity with external surface of the stem; the packer also consists of a sealing component, of a bushing-pusher with radial slots and a radial opening communicating with circular cavity, of cams installed in radial slots of the bushing-pusher, fixing it on the stem and designed to perform axial displacements, of a piston connected to the bushing-pusher with shear screws. A cone is rigidly connected with the piston, a ram holder with radial slots is secured on the stem with shear screws, screw-thread dies with end collars, arranged in radial slots of the ram holder, are assembled on the stem. There is a cylinder fastened on the bushing-pusher and a ratchet assembled on the cylinder for fixing the cylinder relative to the piston. According to the invention the packer is equipped with upper and lower stay nuts with internal circular lug; the nuts are correspondingly secured on the anchor and on the bushing-pusher, with a stop ring installed on the shell and designed to interact with the circular lug of the lower stay nut; also the shell has an external circular lug installed in the anchor, designed to perform axial displacements and to interact with the circular lug of the upper stay nut; while the sealing component is located on the shell between the upper and lower stay nuts.

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2 cl, 2 dwg

FIELD: oil and gas production.

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2 cl, 3 ex, 9 dwg

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FIELD: oil and gas production.

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2 dwg

FIELD: oil and gas production.

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5 cl, 2 dwg

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20 cl, 6 dwg

FIELD: oils and gas production.

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Test plug // 2361061

FIELD: oil and gas industry.

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20 cl, 3 dwg

FIELD: oil and gas industry.

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3 dwg

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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