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Self-detaching bidirectional action packer with electromechanical drive

IPC classes for russian patent Self-detaching bidirectional action packer with electromechanical drive (RU 2250351):

E21B33/12 - Packers; Plugs (used for cementing E21B0033134000, E21B0033160000)

Another patents in same IPC classes:

Two-packer device / 2249669
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.

Device for isolation operations in wells / 2249094
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.

Device for isolating inter-tubular space in the well / 2247223
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.

Packer testing stand / 2247222
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.

Mechanical packer system / 2246604
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.

Packer / 2245986
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.

Self-detaching bidirectional action packer with electromechanical drive / 2250351
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.

Packer / 2251614
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.

Packing device of additional casing column / 2254441
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.

Packing device of additional casing column / 2254442
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.

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

The invention relates to the oil and gas industry and is used to isolate zones casing with maintenance, insulation and research.

Known packer, consisting of a body with an axial channel of the sealing element with top and bottom stops, tapered sleeves with slipcase and spring hollow Radome, which houses the cylinder to atmospheric pressure, the elastic element separated by a partition with a valve in the form of a diaphragm (A.S. USSR №1112114, E 21 33/12, “Packer”). When using this packer is difficult to guess the interval of his landing as he descends into the well under its own weight in free-fall.

Known packer Electromechanical cable-rope, consisting of a hollow casing with radial channels installed on the body of the sealing element with upper and lower flanges and the follower cone to host slipcase installed in the body cavity of the trunk, forming with the body of the circulation channel, reporting through the radial channels of the housing space behind, above and below the sealing element and is installed with the possibility of overlap of the circulation channel after sealing of the well and the drive is installed above the sealing element and connected to the housing and the barrel (U.S. Patent No. 354212, E 21 In 43/00, 1970, “Packer”). This is not the packer ensures reliability for multiple landing and breaking, as well as the integrity of the wellbore.

The purpose of the invention is to reduce material costs and timing of technological operations:

- the moulding of the columns and the elimination of violations by setting tableusers packer instead of traditional cement bridges;

- determine the response characteristics of the upper layer and violations in the convoy;

- cut off the bottom of the reservoir as when conducting short-term technological operations and ongoing basis irrespective of the magnitude of pressure in the reservoir.

Packer double-acting with ottseplyayuschimsya Electromechanical actuator, characterized in that it includes a housing that houses the motor, gearbox with an output shaft connected to a screw pair, which is connected with a thrust, with the lower part of the gripping pins with spring for transmitting axial forces on the Central rod, with the upper part of the ledge, groove and notches, and in the lower part of the sealing ring, thrust nut, the packer includes a sleeve having on the inner part of the conical surface of the boss with the tabs located in the slots of the lugs and the gripping segments of the shear ring, United still with the boss, a fixed sleeve, a packer rubber, behold the lo, rigidly United with the boss, the movable flange and two cone oppositely located to each other, a die movably mounted on a cone, rod, pivotally connected to the dies, pipe, still planted on the cone, the sliding sleeve, balls, preloaded by a spring and a screw for connecting the boss to the sleeve, cable rope, which is the load-bearing rope and feeding through a vein of a current motor, shear washer, Podiatry nut, and used when retrieving the packer site engagement, which includes pusher, svorachivayushiysya on the lower part of the screw pair, split collet and the housing, and the boss and the movable flange is made through holes for messages over and podvecerni cavities well.

The device consists of (smpeg) of the hollow body 1 in which is located the electric motor 2, a gear 3 with the output shaft 4 connected to the nut 5, forming a screw pair with the screw 6, the limit switches 7 and 8, the circuit associated with the motor 2, the contactor 9, located on the screw 6, the sleeve 10, having on the inner part of the conical surface 11, rod 12, which is connected with the screw 6 and having on the lower part of the gripping pins 13 with the spring 14, the Central rod 15, in the upper part of the ledge 16, turning 17, notches 18, and the lower part of the sealing ring 19, the thrust nut 2, the boss 21 of the shear ring 22 located in the grooves of the boss 21 and the gripping segments 23, the stationary sleeve 24, which is connected still with the boss 21, packer rubber 25, the seat 26, the rolling of the flange 27, the two cones 28 and 29, oppositely located to each other, the dies 30 and 31, movably placed on the cones 28 and 29, rods 32, pivotally connected with the dies 30 and 31, the pipe 33, still planted on the cone 28, the movable sleeve 34, the balls 35 which are pressed to contact spring 36 and screws 37 and the retaining lug 21 connected to the sleeve 10, the cable rope 38, which carries the cable and supply electric current to the motor 2 through the conductor 39, shear washer 40, bogatoi nut 41 node mesh, which includes: a plunger 42, svorachivayushiysya on the lower part of the screw 6, the split collet 43, the casing 44 having in the inner part of the cone 45. The boss 21 is made the tabs 46 and the through hole 47, the movable flange 27 also has a through hole 48, which is used for messages over and podvecerni cavities well. Shear washer 40 is involved in the planting of the packer through the transfer of axial force from the main shaft 15 and the nuts 41 on the cone 29, also in emergency cases using a standard trublood is capture the boss and extends upward shear washer 41 is destroyed, the cone 29 slides down and there is a release of the packer from the column and remove it./p>

The device operates as follows.

The assembled packer (1) down into the well to the desired interval, give current to the electric motor 2, the torque through the reduction gear 3, the shaft 4 is transmitted to the nut 5 screw and the screw 6 is moved upward, creating an axial force directed upwards. This force through the rod 12 and the gripping pins 13 is transmitted to the Central rod 15 which by means of shear washer 40 and nut 41 moves the cone 29 upward, while the dies 30 and 31 are nominated in the radial direction and fixed to the walls of the column. Then under the action of axial forces act on the Central rod 15, building 1, the boss 21 and the stationary sleeve 24 is moved down, packer rubber 25 under the force of compression rolling of the flange 27 is deformed in the transverse direction and overlaps the annular space between the casing and the packer. This saddle 26, rigidly United with the boss 21 and the stationary sleeve 24 is moved downward, the sealing ring 19 come into the saddle 26, densely forming the valve, eliminating the flow of fluid through it (smfg). The compression packer rubber is controlled at the mouth of the ammeter shows the current consumption of the motor 2, that is, the process of planting packer is controlled from above by the operator. Very top position of the rod 15 is fixed by a limit switch 7 off the em motor 2 when the touch of the contactor 9, located on the screw 6. When the movement of the Central rod 15 up gripping segments 23 are moved down the notches 18. At the same time, the balls 35 under the action of the spring 36 fall into the annular space formed by the groove 17 on the Central rod 15, thereby boss 21 down from the sleeve 10. If the layer or breach below the packer has a higher pressure than the static pressure in the well, a cone 29 with the dies 31, that is, the force upward through the reservoir pressure from below, is perceived packer rubber 25, the cone 29 is moved upwards, sticking die 31 to the wall of the column, which provides a more reliable setting of the packer, than in the prototype. After setting the packer create a working pressure in the borehole with the mouth, while running the cone 28 and the plate 30, i.e. the effort from the top down, is perceived packer rubber 25, then the cone 28 is moved down, getting jammed die 30, which prevents movement of the packer down.

Uncoupling of the Electromechanical drive from packer is as follows: feed current of reverse polarity to the motor 2, the torque through the reduction gear 3, the shaft 4 is transmitted to the nut 5 screw 6 and the rod 12 is moved down, gripping the pins 13 slide on the inner cylindrical surface of the sleeve 10 and down, in the bottom position moving on onicescu surface 11, free the projection 16 of the Central rod 15 (Fig 3). The contactor 9 and the bottom limit switch 8 (Fig 1), the motor 2 is switched off. The drive down from the packer and removed the top, the packer remains in a well planted (smfh), since the gripping segments 23 hold the Central rod 15 in its upper position due to the shear ring 22, sandwiched between the boss 21 of the gripping segments 23. The potential energy of the deformed rubber packer 25 holds the shear ring 22 of shear and is designed to rupture at a force greater than the force of the elastic deformation of the sealing rubber 1 ton.

Removing the packer: after executing a certain process operations in nadakarni space (cavity) well you need to extract it. This turns the sleeve 10 and the rod 12, but instead is set accordingly, the casing 44 is a split collet 43 (see figure 5) and plunger 42, the screw 6 is in the upper position, i.e. the contactor 9 concerns the upper limit switch 7, the drive down into the well, while achieving the casing 44, the boss 21, the collet 43 catches for the tabs 46. Give a current of reverse polarity to the motor 2, the plunger 42 is moved down (6), rests on the ledge 16 of the Central rod 15, it in turn moves down together with capture segme the Tami 23, shear ring 22 is destroyed, the sealing ring 19 out of the seat 26, the pressure in nadakarni and padmakara space are aligned through holes 47 and 48, packer rubber 25 razgovoritsa, the source of the nut 20 rests on the bottom of the cone 29, while the upper cone 28... moves up, the dies 30 and 31 associated thrust 32, out of the stuck state and the packer is released. The time of the destruction of the middle ring 22 is controlled with the mouth with the help of the device (ammeter). Once triggered, the lower end 8 and the electric motor 2 is stopped, the packer together with the actuator by a cable-rope 38 is removed on the surface.

Techological advantages of this packer: removing drive on the surface after setting the packer, carrying out technological operations in nadakarni space by the injection of reagents into the reservoir, the violation or conduct backfill operations requiring extended periods of time, while the lower reservoir with high pressure temporarily disable the ability to cover the lower layer when working with the upper layer regardless of the pressures in the reservoirs.

Packer double-acting with ottseplyayuschimsya Electromechanical actuator, characterized in that it includes a housing that houses the motor, gearbox with an output of the scarlet connected with a screw pair, which is connected with a thrust, with the lower part of the gripping pins with spring for transmitting axial forces on the Central rod, with the upper part of the ledge, groove and notches, and in the lower part of the sealing ring, thrust nut, the packer includes a sleeve having on the inner part of the conical surface of the boss with the tabs located in the slots of the lugs and the gripping segments of the shear ring, United still with the boss, a fixed sleeve, a packer rubber, saddle rigidly United with the boss, the movable flange and two cone oppositely located to each other, a die movably mounted on a cone, rod, pivotally connected to the dies, pipe, still planted on the cone, the sliding sleeve, balls, preloaded by a spring and a screw for connecting the boss to the sleeve, cable rope, which is the load-bearing rope and feeding through a vein of a current motor, shear washer, Podiatry nut, and used when retrieving the packer site engagement, which includes pusher, svorachivayushiysya on the lower part of the screw pair, split collet and the casing, and on the boss and the movable flange is made through holes for messages over and podvecerni cavities well.