Device for isolating inter-tubular space in the well. RU patent 2247223.
 Packer testing stand / 2247222Stand 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 / 2246604System 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 / 2245986Packer 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. |
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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. |
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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. |
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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. |
 Device for isolating inter-tubular space in the well / 2247223Device 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. |
 Device for isolation operations in wells / 2249094Device 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. |
 Two-packer device / 2249669Device 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. |
 Self-detaching bidirectional action packer with electromechanical drive / 2250351Packer 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 / 2251614Packer 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 / 2254441Device 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 / 2254442Device 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 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
The invention relates to the oil and gas industry, namely, devices for isolating the annulus in wells during hydraulic fracturing, injection of liquid, gas or insulating fluids under pressure to increase oil recovery and repair and insulation works.
A device comprising a hollow body with a radial hole, sleeve, bushing-plunger placed on the body, with the possibility of interaction with the sleeve, a cone mounted on the housing for axial movement, a cylinder connected to the cone, die with plashkoderzhatelya mounted on the housing with the possibility of extension of the dies in a radial direction when interacting with the cone, the ratchet to lock the bushing-follower relative to the cone and dice with plashkoderzhatelya, the thrust sleeve connected to the housing above the cuff, and the saddle with the ball placed in the body [1].
A disadvantage of the known device is complicated to manufacture, high cost, and most importantly not enough high reliability due to frequent failure of the primary node device is a ratchet that do not provide 100% rigid fixation sleeve of the plunger relative to the housing when installing the device in the well. In addition, the device must complete hydraulic anchor the top to prevent moving the device up when pumping liquid, gas or insulating solution under pressure into the well.
Closest to the invention to the technical essence is a device that includes a hollow body with an annular groove and a number of radial holes, the bushing-plunger with radial holes, cuffs, cylinder, circular cone, resistant sleeve with a hole in the wall forming with the casing an annular cavity, a ratchet, snap ring, dice, plashkoderzhatelya, clutch, seat, ball, Cams, shear pins [2].
A disadvantage of the known devices are also relatively low reliability due to frequent failure of the ratchet, not providing 100% rigid fixation sleeve of the plunger relative to the housing when installing the device in the well. In addition, the device is difficult to manufacture, has a high cost and the necessity of picking a hydraulic anchor the top to prevent moving the device up when pumping liquid, gas or insulating solution under pressure into the well.
The technical result of the invention is to improve the reliability and durability of the device, simplifying device structurally and reducing its cost and increasing the productivity of producing wells by eliminating idle injection wells and reduction in material costs due to repeated, multiple installations of new or refurbished devices.
Required technical result is achieved in that the device for isolating the annulus in the borehole includes a hollow body with a number of radial holes, sleeve, bushing-plunger placed on the body, with the possibility of interaction with the sleeve, a cone mounted on the housing, a cylinder connected to the cone, die with plashkoderzhatelya mounted on the housing with the possibility of extension of the dies in a radial direction when interfacing with a taper, saddle and shear the screws according to the invention in plashkoderzhatelya made extra holes in which are mounted slips with the possibility of extension in the radial direction, the inner cavity plashkoderzhatelya communicated with the inner cavity casing near the radial holes in the sleeve-the pusher are made through radial openings in which are installed slips with the possibility of extension in the radial direction, and the bushing-plunger rigidly attached to the housing and its inner cavity is in communication with the annular space under the cuff.
1 shows a General view of the device prior to installation in the borehole; figure 2 - is the same, the installation process well before the cutoff screws holding the saddle; figure 3 - the same, in the working position after installation in the borehole.
The unit consists (1) of the hollow body 1 with a number of radial holes And one or more cuffs 2, bushing-plunger 3 with slipcase 4, cone 5, cylinder 6, the spacer ring 7, plashkoderzhatelya 8 9 dice, slipcase 10 and shear screws 11, the stop-clamp 12 and seat 13 with shear screws 14.
Sealing of the contact surfaces between the parts of the device is ensured by rubber o-rings, shown in figure 1-3.
The device works in the following way (figure 2 and 3). After the descent of the device on the column tubing (tubing) 15 in the casing 16, with the mouth of the well tubing 15 throw the ball 17 on the saddle 13 and create excessive pressure in the internal cavity of the device through a series of radial holes of the housing 1 And is transmitted to slips 10, pushing them all the way into the casing 16. The amount of excess pressure sufficient to zakurivaniya plashkoderzhatelya 8 slipcase 10 in the casing 16 and certainly less than the pressure of the shear screws 14, the retaining seat 13 with a ball 17. Not relieving excess pressure in the tubing 15 unload part of their weight on the plashkoderzhatelya 8, pre-cut screws 11. Cone 5 pushes the die 9 and presses them to the casing 16, which is actually passed all the value of the unloaded part of the weight of the tubing 15. Increase the excess pressure in the tubing to shear the screws 14, and the seat 13 with a ball 17 serves on the borehole bottom.
The device is installed and can be used for its purpose to isolate the annulus between the tubing 15 and the casing 16 when performing various process operations in the well to increase oil recovery.
The use of the present invention will improve the reliability and durability of the device, to simplify the device structurally, reduce costs and, as a consequence, to increase the productivity of the oil by eliminating idle wells and to reduce material costs associated with repairs and idle wells at the industrial implementation of these devices in the oil and gas fields.
Sources of information
1. Catalog of equipment for operation of gas wells. M. Containertypes, 1982, p.24-25.
2. The patent of Russian Federation №2068074, 1994
Device for isolating the annulus in the well, comprising a hollow body with a number of radial holes, sleeve, bushing-plunger placed on the body, with the possibility of interaction with the sleeve, a cone mounted on the housing, a cylinder connected to the cone, die with plashkoderzhatelya mounted on the housing with the possibility of extension of the dies in a radial direction when interfacing with a taper, saddle and shear screws, characterized in that the plashkoderzhatelya performed additional through radial openings in which are installed slips with the possibility of extension in the radial direction, the inner cavity plashkoderzhatelya communicated with the inner cavity of the housing adjacent radial holes in the bushing-follower performed through the radial holes, in which are installed slips with the possibility of extension in the radial direction, and the bushing-plunger rigidly attached to the housing and its inner cavity is in communication with the annular space under the cuff.