The invention relates to the mining industry and is designed to overlap the axial channel of the casing bore below the perforated interval to water shut-off plantar fluid. The technical result that can be obtained with the implementation of the device, the possibility of overlapping wellbore sealant, resistant to formation conditions for a long time, with a possibility of an insulating composition in podarennuyu zone, overlapping hydrodynamic connection with podvecerni area after pressure relief. The device consists of a shaft that is connected through the adapter with the column pipe. On the outer side on the adapter is the case of the cylinder with the formation of an annular chamber in which is situated a piston from the expansion cone. The body of the hydraulic cylinder is equipped with a metallic sealing sheath. The packer is equipped with a split collet, the heads of which are inside the metal sealing shell and cover Rethimno cone. On the outer side of the split collet, below the location of the metal sealing shell, set the teeth of the armature. In the axial bore installed spring-loaded stepped bushing seat and ball valve. the provisions of the saddle is made of radial holes. Step spring-loaded sleeve is connected with the barrel calibrated shear element. Planting packer is by installing a ball valve on the saddle and feed excess pressure on the piston with the input camshaft cone inside the heads, split collets, radial deformation, together with metal sealing membrane to contact with the casing wall. Simultaneously, the teeth of the anchor embedded in the body of the pipe, thus registration of the packer. 3 Il.
The invention relates to the mining industry and is designed to overlap the annulus of oil and gas wells at water shut-off bottom water.
Known pokerwise device (see and.with. No. 1118760, M CL E 21 In 33/12. publ. 15.10.84. Bull. No. 38), consisting of a barrel that has a cylinder with a sealing element supported on the support sleeve, the retainer and the stopper retainer, special threaded coupling of the casing, and a retainer made in the form of a spring relative to the pivot bushing threaded nut associated with the barrel splined connection and having on the outer surface threaded for engagement with threaded couplings.
For overlapping annular pros sits on the ledge of the support sleeve. Right-hand rotation of the pipe string, enter a threaded nut in engagement with the mating threads of the coupling. When the design axial force, reported the sealing element, the latter loses its stability in the internal groove and deformed in the radial direction with the formation of tight contact with the inner surface of the coupling.
The disadvantages. The device may only be applied in the new wells, the casing, in which is introduced a special threaded coupling.
The seal is made of ductile metal capable of plastic deformation under the application of axial load.
In the old wells, the device is not applicable, since there is no way to equip casing special threaded coupling.
The device is intended for use primarily in PA-reinatalling wells, i.e. in conditions of cyclic effects of temperature and pressure. When the flow of fluid in the well will occur unevenly over time the heat sealer and special threaded coupling, which can lead to an increase in the tightness of the connection at the initial moment and to loss of tightness after warming up special threaded mu is their particles landing on the surface of the special threaded couplings can be problems, associated with loss of integrity of the packer.
Known heat-resistant packer (see and.with. No. 1548405, M CL 5 E 21 33/12, publ. 07.03.90. Bull. No. 9), containing a hollow shaft, the fixing unit of packer saddle in the axial bore with ball case with a fixed sealing element, Rethimno cone and spacer retainer elements slips on the perimeter. The sealing element is designed as a cylindrical metal shell extensions node in the form of balls, which interacts with the inner surface of the sealing element and the surface of the camshaft cone.
Planting packer is done by creating excess pressure below the expansion cone clipshow and transmission of pressure on the cone of node expansion with simultaneous rotation of the casing pipe of the packer and the rolling balls cylindrical metal shell to contact with the inner surface of the casing. Slips Acaryadeva site also nominated in the radial direction prior to the implementation of the teeth in the casing wall and fixing the packer.
Free axial bore of the packer from the seat with the ball by the pressure of the working fluid in comparison with the pressure of landing and reset the seat with the ball on the face. Packer is prepared nny in the landing place of the packer;
- the need to transmit torque to the packer during landing - deformation of the seal;
- the presence of a small spot of contact with the casing string height with sufficient rigidity of the seal and the existence of various defects on the pipe wall of the casing does not allow to reliably isolate podarennuyu area from nadakarni;
- if necessary, drilling, packer arises the need to exclude the rotation of its shaft, which is not provided by design and can significantly increase the time of drilling.
The presence clipshow with teeth indentations in the casing wall, located on the perimeter, helps to hold the packer in place when the perception of axial loads. However, removal of the packer from the place of installation is also difficult due to the lack of return mechanism is expanding cones of the seal and the armature to its original position.
Known heat-resistant packer (see and.with. No. 1361303, M CL 4 E 21 33/12, publ. 23.12.87. Bull. No. 47), consisting of a hollow body, which is fixed to the lower end of the sealing element is a thin-walled cylindrical shell forming an annular cavity filled with filler - rubber. The body is equipped with the pressure element in the form of an annular piston. The mustache is RUB on the clutch element, creating compressive stresses in the rubber, which is being thin-walled metal shell with the provision of its plastic deformation in the radial direction before the formation of tight contact with the casing wall. Lock the packer in position at the expense of output clipshow armature in the radial direction of the expansion cone to contact with the casing wall.
The disadvantages. Because the deformation of thin-walled metal shell occurs due to a pressure in the closed volume and the transfer of radial pressure on the shell with a gap between the shell and the annular piston, with the passage of time after the loss of the rubber elastic properties of a gap, through which there is a message podvecerni cavity with nadakarni, which is undesirable.
It is unclear how it is possible to carry out a radial movement clipshow anchors for fixing of the packer within the casing, since there is no mechanism to transfer the load on slips anchor.
Known heat-resistant packer (see and.with. No. 1731937, M CL 5 E 21 33/12, publ. 07.05.92. Bull. No. 17), taken by the authors as a prototype.
The packer includes a hollow shaft that has a cylinder with a thin-walled metal obolos the om posted by split collet in the form of wedge-shaped Cams with shaped annular groove, which has shaped ring extending beyond the metal shell. In the axial bore mounted the saddle under the ball valve, and at its lower end a lug for engagement with the cone.
On the column tubing packer is lowered into the borehole to a predetermined depth, overlapping the axial bore of the ball and raise the pressure of the working fluid, which is reported resinosa the cone. The latter is moved in the axial direction of the down conversion in the radial movement of the wedge-shaped Cams split collet, which is transmitted to the metal shell with wavy curved ring. The outer diameter of the metal shell increases exceeding the yield strength of the material of the shell. Wavy curved ring also increases its diametrical size and is brought to contact with the wall of the casing with the introduction of the surface layer. Raise the pressure in the tubing from the face to ensure further implementation in the casing sharp outer edges wavy ring, which acts as an anchor. At the same time the saddle with the ball removed from the axial bore and is discharged at the bottom.
Soi cone, that provides continuous compression of the metal shell and undulating ring to the casing wall.
The design flaws. When the transmission of radial deformation of the seal, the last changes (increases) its diameter to the diameter of the casing to receive between them the contact stresses, sufficient, in the opinion of the authors, for sealing overlap podvecerni cavity from nadakarni. However, it is known that the casing has an ellipsoid shape of the axial channel, which implies that the perimeter of the interaction of the metal shell with the inner surface of the casing of the contact stress on the minor axis of the ellipse will be acceptable for the further operation of the packer, and the major axis of the ellipse there is a probability that the gap that makes it difficult to achieve sealing podvecerni zone from nadakarni. Installation on the outer side of the seal anchor, made in the form of wavy curved rings, also contributes to the uncertainty in the definition and creation of the necessary effort landing, moreover, the presence of undulating rings on the outer side of the seal negatively affect its sealing ability, that is, to the sealer to bring forth the need to develop a sufficiently high force, and if you change the diameter of the seal is a change of pitch bends wavy ring and, respectively, the wave height that is almost impossible to perform with the contact ring with the casing wall.
In addition, depending on the wall thickness of the casing to adjust the outer diameter of the seal and undulating rings that require to have reliable information on the casing each well.
The technical result that can be obtained by carrying out the present invention, is as follows:
- possibility hydraulic landing packer with a reliable overlapping annulus combined seal with simultaneous fixation of the packer in the casing;
- the combination Acaryadeva site with collet for simultaneous landing-lock packer and deformation of the seal in the radial direction simplifies the design;
- the possibility of formation of hydraulic connection of the axial bore of the packer with podvecerni area, for example, in the case of applying an insulating composition in podarennuyu region and termination this regard, after dumping the pressure in the axial channel of the tubing string of pipe.
Analysis izobretatelsky. 30.04.85. Bull. No. 16), where the sealing element is made integral with the cylinder and is a thin-walled metal shell provided with a cylindrical band, playing the role of the locking element when planting packer in a special boarding the clutch.
Known heat-resistant packer (see and.with. No. 1252477, M CL E 21 33/12, publ. 23.08.86. Bull. No. 31), where the sealing element is made combined with a steel shell having annular projections, on which the shell of the fusible metal, which when planting packer melts due to the temperature obtained by burning thermite charge.
When conducting patent research on the scientific and technical literature we have not found description mechanical packers, which are aligned in a single node, the drive is aimed at warp-fit seal and subsequent fixation of the anchoring of the packer within the casing, creating a leak-tight contact with the casing through the transfer of tensile stress from thin-walled metal shell on elastic seal during its radial movement to the casing wall.
Not found the execution of the sealing element in the form of concistently element.
Also not found the combination of the elements of the anchor with a split collet member in simultaneous engagement with the expansion cone and a thin-walled metal shell sealer.
Thus, the technical result achieved due to the unknown properties of the parts of the device and connections between them.
The invention is not obvious from the prior art, that is, meets the criterion of inventive step.
The technical result is achieved by the fact that in hydromechanical packer, comprising a shaft, connected through the adapter with the Elevator column, the hydraulic cylinder from the expansion cone and the metal sealing sheath, the anchor, split the collet according to the invention the metal sealing sheath made conical and provided with a sealing ring on the outer side of the barrel is provided with a stepped spring sleeve in the axial channel with the saddle under the ball valve at the top and a check valve that is installed with the possibility of axial movement and the formation of the hydraulic connection of the axial bore with podvecerni cavity in the lowest position and is associated with the trunk calibrated shear element, razrezaem below the location of the metal sealing sheath.
The design of the packer illustrated by the following drawings, where
in Fig.1 shows the design of the packer in the context, in the initial position;
in Fig.2 - mutual position of the parts of the packer in his land;
in Fig.3 - mutual position of the parts of the packer in the feeding position of the insulation material in podarennuyu cavity;
Hydro-mechanical packer consists of a barrel 1, rigidly connected to the top end with the sub 2, on the outer side of which a housing 3 of the cylinder, forming between them an annular chamber 4 in which is placed a piston 5 with the expansion cone 6. Case 3 cylinder is rigidly connected with a metal sealing membrane 7. At the lower end of the barrel 1 is split collet 8, a part of its upper end inside the metal sealing membrane 7 and covering Rethimno cone 6. Split collet 8 below the location of the metal sealing membrane 7 is provided with an annular ledge 9 on the perimeter of the fixed teeth 10 of the armature and rigidly connected with the bottom end with the barrel 1. On the external side of the metal sealing membrane 7 has a sealing ring 11 held by a threaded nut 12.
In the axial channel 13 of the barrel 1 set step 14 check valve 18. In the body of the barrel 1 has radial holes 19 isolated body stepped spring sleeve 14 and the sealing ring 20 from the axial channel 13. Step spring-loaded sleeve 14 is connected with the barrel 1, calibrated shear element 21. Annular chamber 4 above the piston 5 permanently hydraulically connected with the axial channel 13 of the barrel 1 radial channels 22.
The operation of the device.
Device via a bayonet lock is attached to the lower end of the tubing string of tubing and lowered into a borehole to a predetermined depth. The ball valve 16 to the saddle 15 is not set, and the axial channel 13 of the barrel 1 freely communicated with the axial channel 17 is stepped spring sleeve 14.
In this position rinse well bore by feeding the working fluid in lifting the string of pipe. The working fluid is supplied into the axial channel 13 of the barrel 1 of the device, press the check valve 18 and the annular gap between the device and the wall of the casing back to the surface.
In the axial channel of the tubing string of pipe discharge valve ball 16 with landing on his saddle 15 (see Fig.1). Thereby overlapping the hydraulic connection between the cavity of the tubing string of pipe and podvecerni cavity wells. Create ibusa 3 cylinder and acts on the piston 5 from the expansion cone 6. Rethimno cone 6 is moved relative to the shaft 1 and the housing 3 of the cylinder and inserted into a split collet 8, which is moved in a radial direction with providing radial deformation of the metal sealing membrane 7 with the sealing ring 11 to contact with the inner surface of the casing. Upon further movement of the piston 5 downward compression of the sealing ring 11 and the input of teeth 10 of the anchor into engagement with the wall of the casing (see Fig.2). Thus is the overlap of the annular gap between the tubing and casing pipes with the fixation device.
Served in the axial channel of the tubing string of pipe insulating composition and increase the pressure above the pressure of the landing of the packer, which reported on the cross-sectional area of the stepped spring sleeve 14. When the design effort is cut calibrated shear element s moving speed spring sleeve 14 down below radial holes 19 of the barrel 1, which opens a hydraulic connection between the axial channel 13 of the barrel 1 with podvecerni cavity (see Fig.3). The estimated volume of the chemical composition is pressed in podarennuyu area and squeezing the tube is discharged at the top in the Elevator columns of the composition. Squeezing the tube comes to the ring and stop-process stop. Excessive pressure in podvecerni cavity closes the check valve 18, the force of the compressed spring step spring-loaded sleeve 14 is returned to its original position with the cessation of hydraulic connection podvecerni cavity with the cavity of the tubing string of pipe. Disconnect lifting the string of pipe from the manifold and lift it to the surface. The device in this position remains in the well. If necessary, return to the underlying horizon, which was covered by an insulating composition, the device can be drilled, because it is made of legkorazmyvaemykh materials.
Hydro-mechanical packer, comprising a shaft, connected through the adapter with the Elevator column, the hydraulic cylinder from the expansion cone and the metal sealing sheath, the anchor, split the collet, wherein the metal sealing sheath made conical and provided with a sealing ring on the outer side of the barrel is provided with a stepped spring sleeve in the axial channel with the saddle under the ball valve at the top and a check valve that is installed with the possibility of axial p is the position and associated with the trunk calibrated shear element, moreover, the split collet rigidly connected with the barrel, the anchor is made in the form of an annular lip with teeth on the perimeter and is installed below the location of the metal sealing membrane.
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.
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.
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.
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.
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
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.
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.
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.
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.