Anchor packer

FIELD: underground well repair, particularly equipment for sealing or packing boreholes or wells, namely devices for annulus separation during bottomhole zone waterproofing, hydraulic reservoir fracturing and other operations to be executed in well.

SUBSTANCE: device comprises body, anchoring unit including cone and slips, sealing member, upper and lower movable and lower fixed stops and drive. Anchoring unit is arranged on the body under sealing member. Drive is made as piston installed inside the body and provided with levers and pressing members made as racks. The racks may move in axial and radial directions. Toothed rings mating the racks are formed on outer surface of the body. Inner body surface is provided with extension to limit piston stroke. Upper body part has shear bush for drop ball receiving. Anchoring unit is located over fixed support. Slides have inclined teeth. Upper parts of the teeth are directed opposite to lower parts thereof.

EFFECT: increased efficiency.

2 dwg

 

The invention relates to techniques for underground repair of wells, namely, devices for disconnection annular annular space when the water shut-off bottom zone, hydraulic fracturing and other works in the gas, oil and water wells.

Known packer anchor type PSH, which consists of a stem on which there is mounted a cone, dural ring and rubber seal. On the upper end screwed the head on the bottom - short shank, which strengthened the lamp with die springs and castle. The lamp is fixed on the shaft lock when the pin (Vfvumnek and other Diagnosis and repair of casing in oil and gas wells. M.: Nedra, 1997, s.43-44).

The disadvantage of the element is low reliability.

So, pokerwise element (cuff) provides sealing of the annular space (separation) and anchoring due to the load created by the weight of the pipe string, the value of which may not always be sufficient to compress sleeves and anchor dice in shallow wells, or when the packer is set at a shallow depth. In such cases, the packer does not work and uncoupling the annular space is not obespechivaetsya.

In addition, the spring lantern does not guarantee retention tool (tubing) from its own weight at the moment of anchoring Plas is to the production string, because their function is to provide concentrations of the packer to save from damage cuff during the descent of the tool, but for the temporary retention of the tool anchoring.

The closest in technical essence and the achieved result of the claimed packer-anchor is a packer-anchor containing sub, upper stem with upper and lower radial protrusions, the lower stem with a groove, rigidly interconnected, the upper body with spring-loaded dice, split cone with internal radial sampling, the sealing element is placed above the sealing element, the focus and the casing positioned below the sealing element of the cone, the lower housing with spring-loaded dice and straps, retainer, differential shaft, rigidly connected with the upper and lower rods, differential bushing rigidly connected to the casing and focus the sealing element, when this differential bushing set free on the differential piston rod can be locked down-gearing it with a differential piston rod and cone split spring-loaded relative to the differential bushings (RF Patent No. 2179228, EV 33/12, publ. 2002).

The disadvantages of the known packer-anchor are the design complexity and low reliability.

Thus, anchoring and Petrovka provided created by the load of the tool (the colon is Oh tubes). This solution does not always reach a positive result, especially in shallow wells.

In addition, there is no assurance of translation release from transport position to working condition by rotation of the weight of the tool even in the presence of spring strips, especially at shallow depths is not possible to unload the tool and make Petrovka (dividing the annular space). There is a possibility not to zapchelovtsa or zapchelovtsa not in the given interval, i.e. there is no confidence in the reliability of operation of the packer-anchor.

The present invention is to simplify the design and increase reliability.

The essence of the present invention is that known packer-anchor, comprising a housing, an anchor node, consisting of a cone and plates, sealing element, the upper movable and lower fixed stops and the drive, and the anchor node is placed on the chassis under the sealing element according to the invention, the actuator is made in the form of a piston installed inside the enclosure with the levers and pressure elements made in the form of gear racks mounted for movement in axial and radial directions, on the outer surface of the case is made reciprocal toothed ring under the rack, and on the inner surface of the housing is performed ledge to limit the stroke of the piston, the upper part of the housing is fitted with a shear sleeve discharged under the ball, with the anchor node is located above the fixed stop, the teeth of the dies is made inclined, and the upper half of the teeth are directed at an angle towards the angle of the lower half of the teeth of the dies.

Sign - teeth of the dies is made inclined, and the upper half of the teeth are directed at an angle towards the angle of the lower half of the teeth of the dies allows you to increase the strength of the resistance (friction) of the packer-anchor offset the production string from the hydraulic pressure and the weight of the tool (NCT), respectively, both from below and from above and, as a consequence, to improve the reliability of operation of the packer-anchor.

Feature - location of the anchor node over a fixed focus - allows you to provide anchoring and unloading of the tool followed by Petrovci sealing element to divide the annular space in the well.

Sign - run drive in the form of a piston with levers and gear racks - allows to simplify the design of the packer and to ensure reliable operation.

Figure 1 presents a General view of the proposed packer-anchor in longitudinal section.

Figure 2 presents die in the section.

Packer-anchor includes a housing 1, a drive consisting of a piston 2 mounted inside the housing 1 with the levers 4 and y is mnimi elements, made in the form of toothed rails 5 mounted for movement in axial and radial directions of incoming and engages with the response, the toothed rings 6, performed on the outer surface of the housing 1, the shear sleeve 3 that is installed in the upper part of the piston 2, the upper movable stop 7, a spring 8 for podpruzhineny rails 5, the sealing element 9, the anchor node, consisting of the cone 10 and the gear dies 11, mounted for movement along the slots of the cone 10, made in the form of the "swallow's tail", the lower fixed stop 12, fixed on the housing 1 shear pins 13 (or left-handed) and waste bowl 14. In the middle part of the housing 1 on the inside surface of the protrusion 15 to limit the stroke of the piston. When the anchor Assembly is mounted under the sealing element 9 and above the fixed stop 12.

The teeth of the dies 11 is made inclined, and the upper half of the teeth are directed at an angle towards the angle of the lower half of the teeth of the dies.

Packer-anchor works as follows.

After you release the packer-anchor on tubing or other pipe in the well to the place of its installation in the production string 16 are dropping the ball 14, which sits in the sleeve 3. Then create pressure in the tubing by pumping. When the piston 2 AC is reportedly down in the housing 1, until they rest on the ledge 15, and by means of levers 4 transmits the force to the rack 5, which move down the response of the toothed rings 6, and transmit the force to the movable stop 7 and further through the sealing element 9 to cone 10, which moves down and moves the die 11 in the radial direction to mate (zakurivaniya) with the production column 16. After anchoring happen the final compression of the sealing element 9 and the sealing of the annular space.

A pair of packer-anchor with the wall of the production string 16 is fixed clearly in Gibeah change weight downward. You can download a tool (tubing) on the packer-anchor to zero.

To open the lock channel in the manifold to create the calculated hydraulic pressure to shear the sleeve 3. The pins 13 are cut and sleeve 3 with ball 14 fall to the bottom.

By the end of the process when repairs or other work in the borehole release of the packer-anchor from the column 16 may be implemented:

- when fixing the lower fixed stop 12 shear pins 13 axial load up on the tubing;

- when fixing the lower fixed stop 12 left-hand thread on the body 1 by rotating the tubing to the right.

If, for technological or other reasons you want to raise the tubing and leave the packer-anchor in wells is in working condition, the fixation of the lower fixed stop 12 provide shear pins 13 and above the packer-anchor provide the sub with the left turn.

The use of the proposed packer-anchor allows to increase the reliability of its operation in different geological conditions, various kinds of purposes and processes of repair and maintenance of wells.

The economic effect from the use of this technical solution in deep and thermal wells will be approximately 30-40% in a single operation in comparison with existing devices.

Packer-anchor, comprising a housing, an anchor node, consisting of a cone and plates, sealing element, the upper movable and lower fixed stops and the drive, and the anchor node is placed on the chassis under the sealing element, wherein the actuator is made in the form of a piston installed inside the enclosure, with levers and pressure elements made in the form of gear racks mounted for movement in axial and radial directions, on the outer surface of the case is made reciprocal toothed ring under the rack, and on the inner surface of the body has a protrusion for limiting the stroke of the piston, the upper part the housing is fitted with a shear sleeve discharged under the ball, with the anchor node is located directly over vienam emphasis, the teeth of the dies is made inclined, and the upper half of the teeth are directed at an angle towards the angle of the lower half of the teeth of the dies.



 

Same patents:

The invention relates to the field of well operation and can be used to provide pumping of fluid pumped by submersible pump in the well casing string

The invention relates to the oil and gas industry, namely to the packers for a step of cementing the casing, in particular technical columns, the overlapping zone of absorption of cement slurry

Anchor packer // 2301321

FIELD: underground well repair, particularly equipment for sealing or packing boreholes or wells, namely devices for annulus separation during bottomhole zone waterproofing, hydraulic reservoir fracturing and other operations to be executed in well.

SUBSTANCE: device comprises body, anchoring unit including cone and slips, sealing member, upper and lower movable and lower fixed stops and drive. Anchoring unit is arranged on the body under sealing member. Drive is made as piston installed inside the body and provided with levers and pressing members made as racks. The racks may move in axial and radial directions. Toothed rings mating the racks are formed on outer surface of the body. Inner body surface is provided with extension to limit piston stroke. Upper body part has shear bush for drop ball receiving. Anchoring unit is located over fixed support. Slides have inclined teeth. Upper parts of the teeth are directed opposite to lower parts thereof.

EFFECT: increased efficiency.

2 dwg

Drillable packer // 2344270

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil and gas production industry and is intended for overlapping of intertubular space and performance of isolating works in case of wells overhaul. Drillable packer contains shaft with notches on external surface, the following components installed on shaft - combined sealing element, extrusion washers, upper and lower rupture screw-thread dies, movable upper and fixed lower supports, fixator in the form of split spring rings in annular bore of movable support. Packer shaft is equipped by left sub with calibrated annular bore and nipple in axial channel, which is rigidly connected to left sub and equipped with fitting valve in axial channel in the form of sleeve with dead bottom and radial holes covered with bushing equipped with throttle. Bushing is connected to sleeve by calibrated shear element. Bottom support is equipped with spring-loaded check valve in the form of body with plug in middle part and radial holes, elastic sealing collar at the lower end, installed with the possibility of interaction with seat in axial channel of lower support.

EFFECT: increase of intertubular space sealing reliability, and also increase of fitting tool functional resources by its multiple usage.

3 cl, 4 dwg

Parker // 2379470

FIELD: oil-and-gas industry.

SUBSTANCE: parker contains a channel with sealing element, executed as a set of sleeves, and a hydraulic anchor, including a ram holder, rams and a cone, and an electrical cable, at that the hydraulic anchor has a case-piston, connected to the channel and creating a piston void together with creping its over the ram holder, connected through the channel wall hole with the channel external void, hydraulic anchor case-piston and the parker case connected with nipples over the sealing elements, inside the case-piston channel located a sickle shaped tube adjusting to its external surface, connected to the nipples inclined holes, the electrical cable goes throughout the sickle shaped tube, which cores enters the nipples inclined holes and connected to located on the nipples inclined holes ends cable connectors, with its help cable cores going through the sickle shaped tube connected to extension cables, at that the nipple connected to the channel, connected with tubing string, with the aid of which the parker installed inside the borehole with ability to of tubing string supply through nipples, the parkers channel and the hydraulic anchor case-piston medium produced form the well, at that nipples ends inclined holes and the sickle shaped tube ends mutual dislocation in one plane created because of the nipple position fixing relatively to the parkers channel and the hydraulic anchor case-piston, correspondingly with a help of a retainer nut, screwed on the parkers channel, which rotation relatively to the parkers channel limited with a stop screw, and nipples connected to the channel with captive nuts, screwed on the nipple screw till it external end meets retainer nuts.

EFFECT: parker operation reliability increase.

4 cl, 1 dwg

Parker-anchor // 2379471

FIELD: oil-and-gas industry.

SUBSTANCE: well parker-anchor, containing a case, an anchor unit, consisting of a void cone and a ram, installed under a sealing element, located between a top fixed stop block and a bottom stop block, and a drive, made as a piston with pass through channel, equipped with pass though narrowing on the bottom, and from the top - with a void bar, which stiffly and axially connected with the cone from the top, stiffly fixed with the case. The piston installed inside of the movable cylinder, and the inside void between the cylinder and the piston connected with the bar void over the pistons pass through channel narrowing, at that the top stop block executed spring loader from the top and with ability of limited upwards movements, and the bottom stop block equipped with radial windows and is movable, has upwards movement ability, interaction with the cylinder at the bottom. Rams made roller shaped with longitude holes, installed in the bottom stop block windows on axis, which fixed perpendicularly to the case axis, at that the rollers longitude hole diametre is bigger then axis external diametre, and the rollers external surface serially interacts with the void bar external surfaces, the cone, the case and the wells wall during the bottom stop block movement relatively to the case. In the offered parker-roller design, which roles between the well wall and the case, achieves a reliable borehole separation in result to the tubing string weight, because of that parkering and unparkering executed with tubing string movement, which location controlled on the borehole head.

EFFECT: design simplification, operational reliability increase, manufacturing and maintenance works cast cutting due to simple and processible spare part use, their quantity decrease.

7 dwg

FIELD: oil and gas production.

SUBSTANCE: packer-anchor consists of housing, anchor unit made of cone and slips in a form of rollers, sealing element between the upper and lower movable supports, drive. The upper support is spring-loaded downwards by coil spring that leans on the lower bushing of protective means against foreign substances that includes upper and lower movable bushings loaded by the said spring and collar fixed between these bushings capable of radial extension. The effort necessary for maximum radial extension of the collar is less than the effort necessary for rollers movement on the cone. The possibility of upper support axial movement is limited by end surface of housing step. Method of well annular space separation consists in descending of described packer-anchor into the well, preparation of packer-anchor to installation by pressure of pumped fluid, setting of rollers into working position, preparation of sealing element for separation of well space, separation of well space with the possibility of further de-packering-de-anchoring, removing from well or movement to well other zone.

EFFECT: increase of device and method of space separation reliability, facilitation of operational service.

2 cl, 7 dwg

Packer // 2459928

FIELD: oil and gas production.

SUBSTANCE: packer includes hollow shaft, sealing elements with stops mounted on the shaft, anchor unit that consists of casing with cone with slots and plates installed in them, connected to hydraulic cylinder piston via rods, the cavity of the cylinder is connected to the cavity of the shaft through radial channel and extension-type connection pipe mounted at the lower end of hollow plunger. Note that the piston is spring-loaded downwards in relation to the cylinder - to transport position and the rods are assembled consisting of upper, pin-connected to the plates, and lower, spherically-connected to the piston, parts that are interconnected via threaded connection adjusting the rod length. Sealing elements on outer surface contacting the stops can be equipped with facets, the quantity of sealing elements can exceed two and additional intermediate stops can be arranged between them, under the sealing elements there can be installed a driving washer rigidly connected to the corresponding intermediate support.

EFFECT: extension of packer functional capabilities for operation in slope-directed and horizontal areas of the wells, increase of packer reliability, simplification of packer assembly.

5 cl, 2 dwg

Drillable packer // 2483192

FIELD: oil and gas industry.

SUBSTANCE: drillable packer includes a shaft with a notch on outside surface, a sealing element, upper and lower disruptive rams, with upper and lower cones, a movable upper support and a fixed lower support, a fastener in the form of split spring rings in an annular bore of the movable support, a nipple in an axial channel of the shaft, which is connected through the left adapter to a hollow plunger of a hydraulic setting device, a fixed support with a spring-loaded shoe valve in the form of a housing with radial holes and a sealing cup installed on the seat. The nipple is equipped with a pusher, with an annular bore at a connection point, in the axial channel of which there installed is a piston with a bar and a sleeve, which is equipped with radial holes and rigidly attached to the pusher. The shoe valve is equipped with a seat, at the connection point of the housing of the shoe valve with the nut equipped with a shell resting on the spring, in the axial channel of which there is a seat on the internal annular projection and a spring-loaded ball valve is installed. A sleeve is equipped with longitudinal slots on the end and passed through the axial channel of the seata to the axial channel of the shoe valve with possibility of the end interaction with the spring-loaded ball valve. The bar is passed through an axial channel of the sleeve so that it goes beyond its end and forms together with it an annular gap hydraulically attaching the cavity of the packer to the axial channel of the pusher.

EFFECT: avoiding conditions of occurrence of a hydraulic impact.

4 dwg

Anchor for tubing // 2634316

FIELD: construction.

SUBSTANCE: invention relates to devices for fixing a tubing string in a casing string and eliminating the undulatory bending of the tubing string during the production of a reservoir fluid by downhole rod pumping units. The anchor consists of a housing, a cone, dies mounted on the cone by means of a dovetail, a casing, shear pins. On the cone along the dovetail, grooves are made, in which rollers installed in a cage are movable arranged, the dies resting on the rollers with their base. The cone is fixed against movement relative to the housing by means of a collet or a spring split ring. The collet or the spring split ring with its lower end rests against a ring mounted on the shoulder of the lower housing, and with its conical projection - into the stop ring mounted on the inner shoulder of the cone.

EFFECT: simplified design and increased operation reliability.

3 cl, 1 dwg

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