Packer

FIELD: oil and gas industry, particularly packers combined with double-acting anchor.

SUBSTANCE: packer comprises rod with radial extension, sealing member connected to rod, as well as upper cone and upper friction blocks. Arranged under the sealing member are lower cone, lower friction blocks, fixer and spring-loaded slats. Located over sealing member are upper pusher, hydraulic damping system and shear pins. The shear pins are inserted in upper pusher body. Upper cone is fixedly fastened to pipe string and to upper rod end. Lower pusher and controllable compression spring brought into contact with lower pusher, are installed under the sealing member. Fixer is made as retaining ball, which is located simultaneously in horizontal slot and in pusher body depression before packer putting in operation. The horizontal slot is made in connection pipe slidably installed on rod. After pusher bringing in operation the ball is located in vertical slot of connection pipe. All packer components are put in operation under the action of compression spring.

EFFECT: increased efficiency of device operation in wells characterized by different geological-technical conditions due to simplified device structure.

2 cl, 3 dwg

 

The invention relates to the field of oil and gas industry, namely, packer, combined with an anchor double-acting.

Known packers double-acting type PD-YAGAMI and PD-YAGAMI, consisting of upper and lower zakurivaya devices, hydraulic cylinders, seals, retainers, shear elements and other hand (Packers, anchors, disconnectors columns, tools and accessories for them, the catalog. - M.: Containertypes, 1984, p.10). Feature of the packers of this type is the presence of a constant saarialho efforts on die top of the anchor post thanks cavity under the dice with podvecerni area through the holes. The disadvantage of the packers of this type is that die hydraulic anchor is designed to hold the packer from moving up, moving in the housing in the radial direction, open access to the ingestion of each socket abrasive agents. Therefore, the inner part of the nest, having accurately machined surface under hermetic seal wears out quickly, leading to tightness of the sealing and destruction. In the packer to actuate the lower saarialho device applied three shear screws and cylinders with precisely machined surfaces and the sealing ring, which in abrasive media is quickly correlate and fail. Cutting screws when installing the unit creates a great dynamic load on the top plate, which wear out quickly and reduce the reliability of the device as a whole.

Known packer type MO-PITS containing stock, the sub attached to the upper end of the rod mounted on the piston rod sealing element, cone, spring loaded die and shoes (strap), a nut with shaped groove and the finger-latch (Packers, anchors, disconnectors columns, tools and accessories for them, the catalog. M: Containertypes, 1984, p.6).

The disadvantage of this packer is the complexity of its installation. While the relationship through the fixed spring reduces the reliability of the device and limits the scope for different wells. In this device the tightness of the annulus is provided by axial compressive loads from weight lifting columns of tubes. However, when using this device, if excessive pressure under the packer weight pipe is insufficient to hold the packer, the column pipe with a packer will move up to a considerable distance (several meters), which will lead to excessive bending of the pipe string above the packer and wellhead equipment will perceive a greater compressive load directed from the bottom up.

From the local well packer double-acting, containing the stem with a groove, the sub, the sealing element is placed over the sealing element of the cone, the upper body with spring-loaded upper dies, placed under the sealing element cone, clamp, lower body with sprung slats and bottom dies (RF patent N 2120023, 6 E 21 33/12, 1998, BI N 28).

The disadvantage of this packer is the complexity of its design and installation in the borehole. During installation of the device on the weight of the pipes and effort from the spring occurs most dynamic loading on structural elements of the upper saarialho device, which leads to rapid wear, and reduction of operational reliability of the device. Most acutely this deficiency results in small packers.

The invention is directed to the achievement of the technical result consists in simplifying the design of the packer and reducing the load on the top node saarialho device. The technical result is achieved by the fact that in the known device, containing the stem with a radial protrusion mounted on the rod and the sealing element is placed above the sealing element of the upper cone and the upper die positioned below the sealing element of the lower cone, the lower die, the latch and spring-loaded strap, above the sealing element placed the top pusher, hydraulic damping system and shear pins located in the body of the upper plunger, and the upper cone is rigidly attached to the string of pipe and the upper end of the rod, under the sealing element includes: a nozzle mounted on the rod can move, the lower the plunger, the spring with adjustable compression contact with the lower plunger and the retainer is made in the form of a retainer of a ball, is placed before the input of the packer in the work simultaneously in the horizontal groove of the socket and in the sample in the body of the pusher, with all the elements of the device are entered in the operating condition under the influence of spring with adjustable compression. In the upper and lower cones are made in the form of a truncated cone with four flat faces and trapezoidal grooves.

Features that distinguish the proposed packer from the closest known by the patent RF N 2120023 (prototype), are the following:

above the sealing element is placed: top plunger, rests with its upper end in the upper die and the lower - sealing element, hydraulic damping system and shear pins located in the body of the upper pusher;

the upper cone is rigidly attached to the string of pipe and the upper end of the rod being simultaneously connecting element;

under uplotnitel the m element is placed: the lower the plunger, spring with adjustable compression contact with the lower plunger and the retainer is made in the form of a retainer of a ball, is placed before the input of the packer in the work simultaneously in the horizontal groove is installed on the rod for movement of the nozzle and the sample in the body of the pusher, and after entering the packer in the work - in the vertical groove of the socket. In this case, all the elements of the device are entered in the operating condition under the influence of spring with adjustable compression;

- upper and lower cones are made in the form of a truncated cone with four flat faces and trapezoidal grooves.

Thus, the proposed device meets the criterion of "novelty."

As in the prior art is not known solutions, has presented a set of essential features that should be considered as an invention meets the criterion of "inventive step"

Figure 1 presents a General view of the packer in the initial position in cross-section on a vertical plane; figure 2 is a horizontal section along the plane A-A; figure 3 is a horizontal section along the plane B-B.

The packer includes a shaft 1 mounted on the rod sealing element 2. Above the sealing element is placed the upper cone 3 and the upper die 4. Under sealing element placed lower cone 5, the lower die 6, the latch 7, made in the form of a ball and holding ivaldi spring 17 in the initial compressed state, the strap 8, spring-loaded by a spring 9. Placed over the sealing element 2, the upper cone 3 is rigidly attached to the string of pipe 10 and to the upper end of the rod 1, the upper die 4 are located in the grooves of the cone 3, its lower part. Above the sealing element 2 is placed the upper plunger 11, the body of which is formed a hydraulic damping system consisting of a cavity 12 filled with damping fluid and having a discharge hole 13 and work holes 14 for displacement of the damping fluid in the cavity behind the stem. In the middle part of the upper plunger 11 are shear pins 15.

Under the sealing element 2 is placed lower plunger 16, the spring 17 with adjusting nut 18. The latch 7 is designed as a locking ball and in the original position are placed simultaneously in the horizontal groove 19 of the socket 20 and the sample in the body of the pusher 16. When the nozzle 20 is placed on the rod 1 can move. The horizontal groove 19 is connected also with a vertical groove 21 in the body of the socket 20. The rod 1 is made with a radial protrusion 22 that communicates with the pins 15. The upper cone 3 and the lower cone 5 made in the form of truncated cones with four flat faces 23 and trapezoidal grooves 24, with the upper cone 3 further functions as a coupling element for anchoring rod 1 to the column TRUB without changing the diameter of the orifice.

To set the packer in the well locking plate 8 presses manually (due to the low stiffness of the spring 9) and lower packer in the casing pipe at a depth of 50-100 meters. Then the column operating pipe with a packer rotate around its axis by 360°. But at the same time the plunger 16, the fixed slats 8, spring-loaded by springs 9, remains stationary. This ensures that the transition of the latch 7 from the horizontal groove 19 in the vertical groove 21 of the socket 20. When this compressed by the nut 18 of the spring 17 through the lower plunger 16 moves the lower toothed plates 6 through the slots of the lower cone 5 up into position until it stops on the inner wall of the casing. Further lowering of the operating pipe 10 by a small amount results in compression of the sealing element 2 and sealing the annulus of the well, and then to the cutting pins 15 radial protrusion 22 of the rod 1. The cutting of the pins 15 is due to the weight of the pipes, as the pins are in the body of the upper plunger 11, and abuts the radial protrusion 22 of the rod 1. The upper plunger 11 moves and moves up the grooves of the upper cone 3 top gear die 4 in the working position to another on the inner wall of the casing. The movement of the plunger occurs smoothly and unstressed due to the gradual displacement of the damping fluid from the floor of the STI 12 through the openings 14 into the cavity behind the rod 1.

Thus, the device is securely closes the annular space in the string of pipe and keeps them from longitudinal movement, preventing their breakage or release.

1. Packer, containing the stem with a radial protrusion mounted on the rod and the sealing element is placed above the sealing element of the upper cone and the upper die positioned below the sealing element of the lower cone, the lower die, the latch and the spring strips, characterized in that above the sealing element is placed the upper plunger, a hydraulic damping system and shear pins located in the body of the upper plunger, and the upper cone is rigidly attached to the string of pipe and the upper end of the rod, with a sealing element placed lower plunger, a spring with adjustable compression contact with the lower plunger and the retainer is made in the form of the stopper ball is placed before the input of the packer in the work simultaneously in the horizontal groove is installed on the rod for movement of the nozzle and the sample in the body of the pusher, and after entering the packer in the work - in the vertical groove of the socket, all the elements of the device are entered in the operating condition under the influence of spring with adjustable compression.

2. Packer according to claim 1, characterized in that the upper and lower cones are made in the ideal of a truncated cone with four flat faces and trapezoidal grooves.



 

Same patents:

FIELD: oil and gas industry, particularly well cementing means, for instance secondary well cementing under pressure for well repair, for separation bridge installation in well in predetermined intervals and for other well isolation works performing.

SUBSTANCE: device comprises hollow shaft with hydraulic cylinder fastened in upper device part, radial orifices in lower part thereof and shoe located under the orifices. Sealing unit with support members and cones located on outer shaft surface is also provided. Device comprises lower jaw for device fastening on well wall, hydraulic drive to bring lower jaw in working position, which is combined with isolation solution supply unit adapted to inject isolation solution in well. The unit is made as lower and upper seats arranged inside shoe or shaft below radial orifices. The seat is adapted for free fall elastic member receiving and is located in annular gap between the shoe and outer surface of annular piston shaft. Working space of the piston is connected to shaft interior through radial orifices. Sealing unit deformation assembly is connected with mechanical drive, which brings upper jaw in working position to provide additional device fastening to well wall. The mechanical drive is made as installation unit having clutch in upper unit part. One clutch end is adapted to be connected to pipes for device lowering in well. Another clutch end is fixedly fastened to connection pipe and to nipple made as hollow piston. The nipple and hollow piston define annular gap for hydraulic cylinder installation. Connection pipe is installed outside of hydraulic cylinder and is connected with it by shear members to provide deformation force transmission from pipes to sealing unit for device lowering in well in working device position. Nipple-piston is located in hydraulic cylinder and has length, which differs from connection pipe length for not more than 20%.

EFFECT: increased operational reliability and simplified device structure.

6 cl, 1 dwg

FIELD: oil production, particularly sealing or packing boreholes or wells.

SUBSTANCE: device comprises two packers having the same structure and pressure relief valve installed in-between. The relief valve is adapted for excessive pressure discharge into annuity between the device and casing pipe. Spring-loaded disc valve is installed over upper packer. The disc valve is used for flow string pressure-testing. Overflow valve for liquid drainage from tubing string is installed over the disc valve. The overflow valve is provided with shutoff member, which may be dropped inside the device before device lifting from well. Check valve is arranged in lower part of the device.

EFFECT: possibility of rising pipe pressure-testing and increased packer and separate packer components air-tightness.

2 cl, 2 dwg

Packer // 2283420

FIELD: oil production industry, particularly for temporary productive reservoir isolation during well repair and to isolate lower reservoirs when passing from lower reservoirs to upper ones.

SUBSTANCE: packer comprises hollow bore with plug and rest, as well as fixer made as shear member. The plug is installed in hollow bore top. The rest may slide upwards relatively hollow bore and is provided with cone and stem located at rest bottom. Sealing member is arranged over the rest. Expanding cone fixedly connected with lower end of hollow bore is installed over the rest. Anchoring unit is located over the expanding cone. The anchoring unit is made as hollow insert with dies spring-loaded inwards. The dies are made as pistons installed in anchoring unit so that the dies may slide outwards. Hollow bore interior communicates with ambient space below sealing member through the stem. Outer stem surface is provided with groove and removable case with position regulator made as finger, which cooperates with above groove. The groove includes short and long sections connected with each other so that when stem performed axial displacement relatively removable case finger alternately passes into short and long groove sections. In transport position the finger is located in short groove section, in working position the finger passes in long groove section. The removable case is provided with spring centrators and spring plates connected to slips, which may cooperate with cone in working positions. In transport position the rest is fixed relatively hollow bore with shear screw. The locating fixer connects driving body made as connection pipe, with upper part of hollow bore.

EFFECT: elimination of work repetition and premature works for packer unsealing and decreased additional costs.

3 dwg

Packer // 2283419

FIELD: oil production industry, particularly for temporary productive reservoir isolation during well repair and to isolate lower reservoirs when passing from lower reservoirs to upper ones.

SUBSTANCE: packer comprises hollow bore with plug and rest, as well as fixer made as shear member. Locating fixer connects driving body made as connection pipe, with upper part of hollow bore. The plug is installed in hollow bore top. The rest may slide upwards relatively hollow bore and is provided with stem, which may cooperate with well bottom. In transport position the rest is fixed relatively hollow bore with shear screw. Sealing member and cone fixedly connected with lower end of hollow bore are arranged over the rest. In working position the cone cooperates with the rest. Sealing member position regulator is arranged in the hollow bore. The position regulator is made as hollow insert installed in hollow bore and arranged over the cone. The position regulator has slips spring-loaded inwards. The slips are made as pistons, which may perform radial movement outwards under the action of excessive internal pressure in the bore interior, which communicates with ambient space below sealing member through the stem.

EFFECT: elimination of work repetition and premature works for packer unsealing and decreased additional costs.

2 dwg

Casing packer // 2282711

FIELD: mining, particularly casing pipe cementing inside well bore.

SUBSTANCE: packer comprises cylindrical body with central axial and inlet channels. Figured bush is fixedly fastened to one end of the body. The bush is provided with inner annular turning. Inlet channel from inner cylindrical body side is closed with shear plug installed in the channel and with check valve. Longitudinally corrugated shell composed of separate end and central sections is installed outside the body. The sections are connected with each other by means of reducing bushes. One end section of the shell is fixedly fastened to outer body surface. Reducing bushes are concentrically arranged along body length from outer body side and may perform axial movement relatively the body. Inner surface of reducing bush sections of the shell and outer body surface create hydraulic chamber communicated with central axial channel of the body through inlet valve. Sealing member with sealed inner cavity is arranged outside central shell section. The inner cavity is filled with plastic substance, for instance with raw rubber, sealant or mixture including hardening tar with liquid hardening agent contained in breakable capsules.

EFFECT: increased reliability of casing annulus packing due to elimination of cross-feed during cementing operation.

3 cl, 3 dwg

FIELD: oil production industry, particularly bore isolation means.

SUBSTANCE: device comprises packer having through body and elastic collar, as well as isolation means having bore with radial channels and inner cylindrical recess, slide installed in bore and provided with two rows of radial channels separated one from another with transversal solid partition. The device also comprises bush installed inside the slide and having ball seat. The ball is dropped inside the device before the second formation treatment. Upper row of radial channels of the slide is in front of radial channels of the bore. Bore, slide and bush are connected with each other by differential shear members. Before the second formation treatment upper and lower rows of radial slide channels are communicated with each other by means of inner cylindrical recess formed in the bore to provide hydraulic communication between tubing string interior and packer interior. Device also has additional packer located over isolation means and spaced a distance exceeding upper formation thickness from the packer. Additional packer comprises upper rest with cylindrical narrowed part, lower rest and additional elastic collar arranged on the narrowed part. Upper rest is movably installed so that the upper rest may slide into lower rest in axial direction. The upper rest is fixed into lower rest by means of shear member. Lower rest may cooperate with additional elastic collar. Upper rest is provided with hydraulic anchors compressed inwards and cooperating with casing pipe having increased pressure created in tubing string interior.

EFFECT: elimination of additional operation for casing pipe shutoff over upper formation.

3 dwg

FIELD: oil and gas production industry, particularly devices to isolate reservoirs in well during segregated injection of different reagents in reservoirs.

SUBSTANCE: device comprises packer including through body and elastic collar, isolation means including shaft with radial channels and inner cylindrical groove, slide with radial channels grouped in two rows and divided with transversal solid partition. The slide is installed in shaft and adapted to receive bush with ball seat to support ball to be dropped into the device before second reservoir treatment. Upper row of radial channels is in front of radial channels of the shaft. The shaft, the slide and the bush are connected with each other by differential shear members. Before the second reservoir treatment upper and lower rows of radial slide channels are communicated with each other by the inner cylindrical groove to establish hydraulic communication between flow string interior and packer body interior. The device is also provided with additional packer spaced a distance exceeding upper reservoir thickness from main packer. Additional packer comprises cylinder located from additional packer top and additional elastic collar installed on hollow base connected to isolation means by clutch and cylinder fixed to flow string. Piston is fixedly secured to hollow base top. Piston is slidably installed in the cylinder so that the piston may be axially displaced in upward direction to define cavity along with the cylinder. The cavity is communicated with flow string interior. The cylinder may cooperate with additional elastic collar.

EFFECT: elimination of additional casing pipe cutoff over upper reservoir.

3 dwg

FIELD: well building and operation equipment, particularly to perform cased well testing, for instance during pressurizing thereof.

SUBSTANCE: device comprises body with power shaft adapted to receive fixing rams and rubber sealing member tightened with bearing sleeve having nut, as well as electromechanical drive of power shaft made as electric drive and planetary reduction gear. Device also has power shaft movement detecting sensor and pressure sensors connected with control panel. Planetary reduction gear comprises four stages and is provided with torque-limiting clutch arranged between the second and the third stages. Outer gear wheel of the first, the second and the forth planetary reduction gear stages is fixed in the body. Outer gear wheel of the third stage is loosely installed. Power shaft has guidescrew and nut connected to the forth reduction gear stage. Sliding rams are installed on intermediate support, which is spring-loaded relatively the body and bearing sleeve. Partition is installed in lower body part. Power shaft may be fixed relatively the partition by means of dowel. Shaft movement detecting sensor is arranged in chamber defined by the partition and body walls. The first pressure sensor communicated with over-the-packer area is installed in lower body part. The second pressure sensor communicated with under-the-packer area is arranged in axial channel made in power shaft to communicate thereof with well medium. The body may be filled with oil and provided with hydrostatic pressure compensator. Corresponding extensions may be formed on replaceable ends of outer gear wheels of the third and the forth planetary reduction gear stages. Movement detecting sensor may be connected to power shaft by movable contact means and electrically linked to control panel. Intermediate support may have inclined guiding means to guide sliding rams, which are spaced along a circle so that 120° angles are defined in-between. Upper sliding rams are offset 60° from lower ones along a circle. Outer surfaces of lower body end and bearing sleeve extend at an angle to instrument axis normal. The angle is equal to angle of intermediate support guiding means inclination to instrument axis and is not less than 6°. Space between bearing sleeve and shaft may be sealed with sealing ring. Axial channel in lower part of power shaft may be connected with radial hydraulic channel communicated with over-the-packer area. Method for packer installation involves lowering packer to predetermined interval; pushing out fixing rams and compressing sealing member of the packer with the use of electromechanical drive. Electromechanical drive comprises electric engine and power shaft kinematically connected with rams and sealing member. Packer installation is accompanied by recording of electric engine load current, power shaft movement amplitude and direction, as well as pressure in over-the-packer and under-the-packer areas. Above data are recorded as diagrams. Degree of sealing member compression is determined from electric engine load current change. Packer air-tightness can be inferred by pressure drop value.

EFFECT: increased efficiency of packer installation control, reduced accident risk.

9 cl, 7 dwg

FIELD: hydrogeologic rock survey, particularly to isolate well intervals during test injection performing and underground water pressure measuring.

SUBSTANCE: device comprises latches, body with radial channels, piston arranged inside the body and hollow rod with radial orifice fixedly connected with the piston. Device also has mounting pipe arranged inside the rod, spring-loaded relatively it and connected to rod by spline connection. The mounting pipe has axial channel and radial orifice. Device comprises pusher with thrust pipe, partition located over the piston and perforated pipe arranged between sealing member sections. The hollow rod is provided with bush connected to the rod by spline connection, with rack secured to lower part thereof and rack connected to inner side of device body. Return spring is put on mounting pipe and arranged in space between the piston and partition. Annular groove for pusher installation is formed in lower bush part. Latches cooperating with racks are installed in upper and lower bush parts.

EFFECT: increased operational reliability.

8 dwg

Drillable packer // 2278242

FIELD: oil production industry, particularly means to isolate productive formation in well having low formation pressure.

SUBSTANCE: packer comprises shaft with outer thread, sealing member installed on the shaft, upper and lower cones and grippers cooperating with each other, as well as fixer having inner and outer threads. Inner thread of the fixer is identical with that of shaft. The packer is provided with bush installed in lower shaft part and connected with adapting bush secured to body by insert. The body has thrust bush and seating bush with check valve. The fixer is arranged in upper shaft part.

EFFECT: increased operational reliability, reduced bottomhole formation zone contamination, simplified technological operations, including operation of drillable packer installation in well, increased well bore air-tightness during well repair and possibility to use flexible pipe (coiled tubing) during well repair.

4 cl, 2 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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