Garipov circulation packer
FIELD: oil-producing industry.
SUBSTANCE: invention is related to oil-producing industry, namely to method of packering in operation and development of oil wells. Packer contains hollow shaft with the main sealing element and multifunctional channel installed in the shaft and filled with filler, where at least one cable and one control instrument are located. Packer is equipped with additional sealing element, which is installed on the hollow shaft at the preset distance from the main sealing element with formation of circulation chamber between them after packer installation in intertubular space, the chamber communicates by means of control instrument installed in multifunctional channel with subpacker zone, and at least one relief valve/controller, which is installed under the main sealing element and accordingly installed in the transverse channel, arranged in the hollow shaft, or at least in one well chamber installed under the main sealing element. The external diameter of hollow shaft between the sealing elements does not exceed the diameter of sealing elements. Control instrument, which is installed in multifunctional channel, is installed in its bottom part. Circulating chamber is installed with the possibility of communication with internal cavity of hollow shaft by means of relief valve/controller. It provides increase of packer operation efficiency during pump operation of wells.
EFFECT: increase of packer operation efficiency in pump operation of wells.
5 cl, 2 dwg, 1 ex
The invention relates to the oil and gas industry, and more specifically to techniques for the extraction operation and development of oil wells during different technological operations, while isolating areas of leakage in the posting process and pumping of wells.
Currently there is an actual solution to the problem of the use of packers in the operation of wells pumping method with high gas factor.
When setting the packer above the pump to isolate the overlying interval of the well, the appearance of free gas in podvecerni zone during operation of the pump. Gas is usually separated from the oil by reducing the pressure in the well below the saturation pressure of oil by gas or by filtering gas from the gas cap, etc.
Free gas accumulating in the annulus in podvecerni area, has an adverse impact on the operation of pumps, particularly pumps (stall feeding, cavitation, engine overheating, low efficiency pump etc). Therefore, the use of packers in pumping wells, especially when the packer cuts off the pump from the upstream annulus (area of leakage)is strongly limited due to accumulation of gas in podvecerni zone. Existing methods (installation fitting, regulator or valve) to divert gas from Podaca the aqueous space in the required amount is not always possible, because there is often pressure on the pump intake by 5-20% below the saturation pressure and the gas, escaping, begins to accumulate in podvecerni zone. This is because when the pump pressure on his uicide will always be higher pressure on its acceptance and, accordingly, will be higher than the gas pressure in podvecerni area, making it impossible challenge in nadakarni zone or pipe in the space above the pump, usually filled with a solution of the killing.
Known packer comprising a barrel mounted thereon a sealing element with cones, die and subs (A.S. USSR №883331, CL EV 33/12, 1981).
The disadvantage of this packer is that when respitrace or failure of the packer due to accumulation of gas in podvecerni zone may occur accidental releases of gas from podvecerni zone, which can lead to an emergency at the well.
The closest analogue is the packer Garipova, including a hollow stem with a sealing element and located in the trunk multi channel, with multi channel filled with gas-permeable and/or sealing filler placed in it at least one cable, and/or one measuring device, and/or one regulating device (patent RF №56939, CL EV 33/12, 2006).
The implementation of this packer multi channel, the filled gas-permeable filler, allows to solve the problem of leakage of gas from podvecerni zone, but only for wells with minor gas factor.
Use it in wells operated pump deep gas factor of more than 50 m3/m3impossible , because the design of the packer does not provide for release of such a significant amount of gas from podvecerni zone, which leads to its accumulation, pushing fluid from podvecerni zone, getting gas at the pump intake and, consequently, to decrease the performance of the pump, to disruption of feeding or jamming of the latter.
In addition, the packer passes the accumulated gas in podvecerni zone through itself in the annular space, which does not affect the efficiency of the well.
The objective of the invention is to increase the technical capacity and the efficiency of the packer in the pumping well operation.
The problem is solved in that the flow packer, comprising a hollow barrel with a primary sealing element and located in the trunk multi channel filled with filler placed in it at least one cable and one regulatory instrument, equipped with an additional sealing element mounted on the hollow shaft at a specified distance from the main sealing element to form between them after the landing of the packer in the annular space of the circulation chamber, reported by posted in multi-channel regulating device with podvecerni area, and at least one by-pass valve/regulator mounted under the main sealing element and placed respectively in the transverse passage in the hollow shaft, or, in at least one borehole camera placed under the main sealing element, and the outer diameter of the hollow shaft between the sealing elements does not exceed the diameter of the sealing elements, and regulating device, housed in a multi-channel, installed in its lower part, with the circulation chamber, with the possibility of communication with the interior cavity of the hollow trunk by-pass valve/regulator.
Moreover, the regulating device installed in a multi-channel, can be made in the form of fitting or fitting with overflow valve.
The inner diameter of the bypass valve/regulator installed under the main sealing element exceeds the inner diameter of the regulating device installed in multi-channel.
The hollow shaft may be made of a compound comprising at least one pipe and/or one pipe.
In borehole camera can be set to control and measure the capacity of the device.
The essence of the invention lies in the fact that the supply of additional packer sealing element located at a distance from the main sealing element, allows after the landing of the packer and seal sealing elements to form a circulation chamber in the annular space and to circulate fluid between the internal cavity of the hollow shaft and the circulation chamber by installing a by-pass valve/regulator in the hollow shaft between the sealing elements to prevent the accumulation of gas in podvecerni area due to its permanent disposal through socket/regulator, housed in a multi channel within the lower sealing element, in the circulation chamber that acts as a gateway, and then, after pressure equalization in the circulation chamber with internal pipe pressure, the bypass of gas into the internal cavity of the tubing.
Creating a circulation of the camera allows you to bypass gas from podvecerni zone regardless of the pressure in the internal cavity of the tubing. The more the circulation chamber, the greater the amount of bypass gas and, consequently, a smaller number of times of shutter-pass valve/regulator, which reduces mechanical wear of the working parts of the by-pass valve/regulator.
Due to the diversion of the gas appears a long time in a stable mode to operate the pumping well.
At very high gas factor, such as more 70-100 m3/m3, it is recommended to perform the hollow trunk of a compound, it is possible to increase its length due to the installation of pipes or tubes between the sealing elements, thereby increasing the amount of circulating chamber.
It is necessary to select the volume of the circulation of the camera due to the fact that when a very small amount will often be activated and therefore very quickly wear out the bypass valve/regulator, and when a large volume of circulating packer becomes cumbersome.
Accommodation in the hollow trunk of a downhole camera with a by-pass valve/regulator gives the opportunity to change, revision and adjustment of removable by-pass valve/regulator and/or measuring device using cable technology.
The invention is illustrated by drawings, where figure 1 shows a General view of the circulation packer, a longitudinal section; figure 2 - ventilation packer with integrated downhole cameras.
Circulating packer includes a hollow shaft 1 mounted on the primary sealing element 2 and located at a specified distance from an additional sealing element 3 with the formation between the circulating chamber 4, a multi-channel 5 made in the form of a groove located in the floor with the will 1. In the lower part of the multi-functional channel 5 within the additional sealing element 3 has a regulating device in the form of the fitting 6 and the hollow shaft 1 under the sealing element 2 is made of the transverse channel 7, which is a bypass valve/regulator 8, which connects the circulation chamber 4 and the inner cavity 9 of the packer. Multi-functional channel 5 is filled sealing filler 10, through which is threaded a cable 11 to connect it to the pump (not shown).
Figure 2 shows the downhole camera 12 and 13 installed in the hollow shaft 1. In borehole camera 12 is a bypass valve/regulator 8, and borehole camera 13 mounted measuring device 14, the lower end of the fitting 6 is a bypass valve 15. The operation of the bypass valve 15 is similar to the work by-pass valve/regulator 8. The bypass valve 15 is usually set in cases where when using the circulation packers with defined standard diameters fitting 6 it is necessary to reduce its flow cross-section. The use of the bypass valve 15 also allows you to use one of the maximum diameter of the fitting 6, the volume of bypass fluid already regulated by the bypass valve 15.
Packer works as follows.
Before lowering the packer in vagina on the hollow shaft 1 set additional sealing element 3 at a given distance from the main sealing element 2 to create a circulation chamber 4 in the multi-functional channel 5, performed, for example, in the form of a groove on the outer surface of the hollow shaft 1, place regulating device, for example the fitting 6, sealing his filler 10, through the filler 10 pass the electric cable 11 to connect it to the pump. In the hollow shaft 1 between the sealing elements 2 and 3, preferably closer to the main, in the transverse channel 7 install bypass valve/controller 8 configured for opening-closing of certain differential pressure between the circulation chamber 4 and the inner cavity 9 of the hollow packer. The packer may be mechanical, hydraulic or mixed principle influence on the sealing elements. Then the screw packer on the tubing pipes, lowered to the desired depth and produce Petrovka by compression of the sealing elements 2 and 3. Sealing elements 2 and 3, extending, seal annular space of the well with the formation of the circulation chamber 4. As in the lower part of the multi-functional channel 5 has a regulating device in the form of fitting 6 or fitting 6 with a by-pass valve 15, which connects podarennuyu area with the circulation chamber 4, through the regulating device begins to receive the gas from podvecerni zone in the circulation chamber. Then, as the accumulation of gas in the circulation chamber 4 when lowering the AI pressure to a certain value, when the differential pressure between the chamber 4 and the inner cavity 9 of the hollow shaft 1 reaches the maximum set pressure of the bypass opening/regulator 8, it will be open. Moreover, the inner diameter of the bypass valve/regulator 8 is considerably greater than the inner diameter of the fitting 6 and the bypass valve 15. From the internal cavity 9 hollow shaft with high pressure into the circulation chamber 4 will rush liquid, after a quick fill fluid circulation chamber 4 and with almost equalizing the pressure therein and in the cavity 9 (depression from 0.1 to 3 ATM) gas will flow under the action of the Archimedean force as easier, from the circulating chamber 4 into the cavity 9 of the hollow shaft. After equalization of the pressure in the chamber 4 and the cavity 9 is closed by-pass valve/regulator 8. The liquid from the circulating chamber 4 through a small nozzle 6 and the bypass valve 15 flows into podarennuyu zone, but instead into the circulation chamber 4 enters the gas pressure decreases again and the process (opening-closing) pressure relief valves 8 and 15 and the circulation chamber 4 (filling and discharge) automatically resumes.
Selection of set pressure relief valves 8 and 15 can be accomplished by conducting a preliminary study well by descent to the monitoring and measuring device 14, for example, a pressure gauge, double acting, additional borehole camera 13 and the simultaneous measurement of pressures in the circulation chamber 4 and in the inner cavity 9 of the barrel 1 of the packer, and when retrieving data from TMS installed on the receiving ESP in real operation of the downhole pump. This will allow for more accurate setting of the valves 8 and 15 at the desired pressure, with the bypass valve/regulator 8 can be lowered or replaced by rope techniques in borehole camera 12 and display well on the optimal mode of operation.
An example implementation
Circulating packer was tested at well # 109 Karamushko field TPDN "Kholmogorneft" JSC "Noyabrskneftegaz. As packer was taken packer mechanical, performed on the outer surface of the barrel multi channel in the form of a groove in a length of 2 m, which exceeds the distance between the sealing elements of the packer. The amount of circulating chamber formed after the landing of the packer between 146 mm operating string and sealing elements spaced from each other at a distance of 1.2 m by inserting a pipe, was 0.93 m3. The optimal amount of the circulation chamber was calculated, taking into account the pressure drop across the nozzle and the bypass valve/regulator installed in a borehole is the Amer, and the speed and the time to fill/bleed fluid from the circulating chamber. In the groove was laid conductive cable, while in the lower part of the groove within the additional sealing element has a regulating device in the form of fitting. Further, the groove was filled with a sealing filler.
After preparatory work in well No. 109 to gas factor of more than 50 m3/m3was the descent of the pump ESP with TMS without separator circulating packer set above the pump ESP. After running well, only after 5 hours, when the pressure at the pump intake below the saturation pressure of 90 ATM, appeared the gas in podvecerni zone and in the circulation chamber respectively started by-pass valve/regulator, testified to the appearance of short term pressure peaks CBT. The well came on continuous mode of operation without disrupting the feed gas.
The application of the packer with two sealing elements forming the circulation chamber, will involve a significant number of wells with high gas factor in operation with leaky columns, and also to cut off and removed from the simultaneous operation of the overlying water-saturated layers.
1. Circulating packer, comprising a hollow barrel with the main o-e is a COP and is situated in the trunk of a multi-channel, filled with filler placed in it at least one cable and one regulating device, characterized in that it is provided with an additional sealing element mounted on the hollow shaft at a specified distance from the main sealing element to form between them after the landing of the packer in the annular space of the circulation chamber, indicated by placing multi-channel regulating device with podvecerni area, and at least one by-pass valve/regulator mounted under the main sealing element and placed respectively in the transverse passage in the hollow shaft, or, at least, in one borehole camera placed under the main sealing element, and the outer diameter of the hollow shaft between the sealing elements does not exceed the diameter of the sealing elements, and regulating device, housed in a multi-channel, installed in its lower part, with the circulation chamber, with the possibility of communication with the interior cavity of the hollow shaft by-pass valve/regulator
2. Circulating packer according to claim 1, characterized in that the regulating device is installed in a multi-channel, made in the form of a fitting or fitting with p is repasky valve.
3. Circulating packer according to claim 1, characterized in that the inner diameter of the bypass valve/regulator installed under the main sealing element exceeds the inner diameter of the regulating device installed in multi-channel.
4. Circulating packer according to claim 1, characterized in that the hollow shaft is made of a compound comprising at least one pipe and/or one pipe.
5. Circulating packer according to claim 1, characterized in that the downhole camera installed measuring device.
SUBSTANCE: invention concerns geophysical methods of well investigation and can be applied in well bore zone sealing during logging research. The device comprises a transformable frame holding a fluid-stopping unit. This unit includes a fiber layer made of organic or natural polymers and/or fiber glass. Additionally the device includes fiber a collecting unit made of permeable fabric, net or perforated material. Also the case holds a spring or umbrella unit implementing case expansion in a borehole. The case is made of materials at least poorly soluble in oil well fluid.
EFFECT: streamlining of technology packer placement in a well.
FIELD: drilling equipment, particularly devices for assembled blowout equipment pressure-testing.
SUBSTANCE: device comprises shaft with central channel and elastic packing member installed on the shaft. Connected to lower shaft end is lower sub provided with radial channel. Shaft has central part shaped as truncated cone. Elastic packing member is installed on the shaft so that it may slide in axial direction. Upper part of packing member is made as two collars facing upwards. Diameter of upper end of lower sub exceeds that of lower cone base.
EFFECT: increased operational reliability of the device.
FIELD: oil and gas production, particularly well interior separation for reservoir isolation one from another.
SUBSTANCE: device comprises packing members with elastic collars and reaming members, seating tool connected to lifting pipes and having lower part telescopically put on technological pipe, anchor, well screen and check valve. Each reaming member except for upper one is connected to body of each next upper packing member from below through intermediate pipe or pipes. Lower packing member body is secured to support pipes. Well screen is included in support pipe and/or one or several intermediate pipes opposite to each reservoir to be developed or treated. Check valve is located over upper well screen. Reaming member is made as thrust secured to telescoping pipe. Thrust of upper packing member has inner cavity and is connected to upper telescopic pipe by shear members so that the thrust may slide with respect to the pipe in axial direction. Thrust sliding is limited by upper annular widened section of upper telescopic pipe arranged inside thrust. Anchor is located over upper packing member thrust.
EFFECT: possibility to operate in wells having non-calibrated inner diameter, increased air-tightness of well interior separation.
2 cl, 1 dwg
FIELD: oil well drilling and operation, particularly for selective well hole flushing to prevent mud accumulation therein.
SUBSTANCE: device comprises body 1, stem 8, sealing member 2, bush 4 and delivery unit. Device also has fixed bush 5 and spring-loaded differential disengaging bush 6 installed inside fixed bush 5. Additional differential bush 9 is arranged between body 1 and stem 8 so that the bush is spring-loaded relatively the body 1. The bush 9 has slots to receive stop 11 for bush fixation and for bush 9 movement limiting. Cap is arranged in lower body 1 part. Piston 15 is installed inside stem 8 and define oil chamber along with the stem 8. Radial channels 24 are made in body 1 and in additional differential bush 9. Engaging cone 16 comprising sealing sleeves 17 is installed at upper stem 8 end. The sealing sleeves 17 restrict device installed in collet clip from displacement in radial and longitudinal directions.
EFFECT: increased reliability of device installation and removal from well, extended conditions and possibility to perform technological operations due to possibility of repeated device installation and removal from well.
2 cl, 7 dwg
FIELD: oil production, particularly pipe string pressure-testing inside well.
SUBSTANCE: packer comprises setting tool, lowering device made as cable head with cable, cylindrical body with seat and central axial and radial channels connecting outer body space with central axial channel thereof, sealing member installed on the body and bush sliding in axial direction. The bush has support anvils and is installed in the body. Pipe string section below pressure-testing interval has test clutch provided with calibrated central channel with inner diameter d less that inner diameter d1 of pipe string. The pipe string has annular depression located over test clutch and having large pipe string clutch joint dimensions in longitudinal direction. Support anvils have longitudinal dimensions B corresponding to longitudinal dimension L of annular depression formed in test clutch and are spring-loaded outwards by means of spring plates. The support anvils are inserted in radial body channels. The body has technological pipe located in top part thereof. Body seat is made as restricted section of central axial channel located below radial channels. Sealing member is outside the channel and is installed on the body. The sealing member may air-tightly cooperate with central channel of test clutch. Bush has widened part formed in center thereof, as well as lower and upper ends having decreased diameters. Lower end the bush cooperates with support anvils from inside and is hermetically inserted in the body seat. Upper end of the bush cooperates with technological pipe from inside. Bush has serially arranged radial orifices and cap arranged upstream of the technological pipe. Cap comprises fishing head. Widened bush section may be engaged with support anvils from inside as support anvils cooperate with annular depression of test bush. Longitudinal short and long turnings connected with each other through figured turning are created on outer surface of technological pipe top. Long turning extends to technological pipe edge. Setting tool is made as pusher connected with lowering device and cooperating with fishing head of the bush from upper part thereof and as pipe installed on the pusher so that the pipe may rotate and move in axial direction. Lower pipe end encloses technological pipe. The technological pipe has inner pin cooperating with technological pipe turnings. In initial position the pin is arranged in short turning.
EFFECT: possibility of low-diameter pipe pressure-testing, decreased metal consumption and costs.
FIELD: oil and gas production industry, particularly pressure-testing of cased well provided with flow string.
SUBSTANCE: method involves filling well with gravity solution; lowering inflatable packer connected to hollow logging cable in well along flow string; leading inflatable packer out of flow string and sealing cable lead in flow string at well head; injecting light-weight liquid in inflatable packer via hollow logging cable up to packer expansion and setting in casing pipe under flow string, wherein light-weight liquid has density of not less than that of well liquid; continuing light-weight liquid injection in packer via logging cable along with injecting gravity solution from well head into well hole annulus; maintaining cable interior and hole annulus pressure difference at threshold inner cable pressure level predefined by technical specifications; measuring pressure in hole annulus and recording pressure change; releasing pressure from logging cable and from hole annulus along with maintaining cable interior and hole annulus pressure difference at threshold inner cable pressure level predefined by technical specifications; lifting hollow logging cable and inflatable packer from well.
EFFECT: increased efficiency.
FIELD: mining, particularly sealing or packing boreholes or wells.
SUBSTANCE: device comprises hollow body made so that body interior may be sealed. The body has head for fishing tool receiving. Anchoring unit with seat may cooperate with flow string joint in lower section of interval to be pressure-tested. Sealing unit includes sealing means and seating mechanism. Annular isolation means is formed as part of movable hollow body section. Additional seating mechanism seal is arranged from the first isolation means side. Additional seal is sleeve having L-shaped cross-section. Opened sleeve end faces elevated pressure cavity. Gland is installed from another side of annular isolation means. The gland is in contact with fixed section of hollow body arranged in anchoring unit seat. The later is installed at flow string joint. Protective case is installed on fixed hollow body section.
EFFECT: simplified structure and increased reliability.
FIELD: oil production, particularly well repair.
SUBSTANCE: device is made as packer assembly including bottom-hole packer adapted to close well annulus due to packer diameter increase under axial compression thereof and pipe arranged in bottom-hole packer cavity. During bottom-hole packer compression the packer slides along the pipe in vertical direction. Device comprises two packer assemblies. Pipe of bottom-hole packer included in upper packer assembly has bottom with orifices and thrust for bottom-hole packer supporting. Device also has outer pipe arranged below lower bottom-hole packer and coaxial thereto. Outer pipe has inner diameter and surface finish to provide sliding thereof along outer surface of pipe located inside bottom-hole packer. Outer pipe has bottom-hole packer thrusts arranged at ends thereof. Lower packer assembly is identical to upper one and is upside down. Lower packer assembly is below upper one and is coaxial thereto. Lower and upper packer assemblies define common outer pipe. Tubing string passes through both packing assemblies through central bottom orifices thereof. Remainder bottom orifices communicate well annulus and clearance between tubing string and outer pipe. Tubing string couplings located over upper packer assembly and below lower one limit vertical bottom displacement.
EFFECT: decreased time and improved well flushing.
FIELD: oil production, particularly downhole device for repeated pipe string interval pressure testing in well.
SUBSTANCE: packer comprises mandrel 1 with figured slot 2 on outer surface thereof. The figured slot 2 has alternating axial short 3 and long 4 sections. Self-sealing collar 5 is installed in upper mandrel 1 part. Located under the collar 5 is support 6. Sealing member 7 and cone 8 are serially installed on the mandrel 1 under support 6. The sealing member 7 is made as self-sealing collar, which prevents liquid flow in top-down direction. Ferrule 9 with guiding pin 10 is installed on mandrel 1 below cone 8 so that the ferrule 9 may slide in axial direction. Guiding pin 10 is located in slot 2 of mandrel 1. Ferrule 9 is provided with springing centralizers 11 and slips 12 arranged along ferrule periphery. Slips 12 are spring-loaded by means of springing plates 13. Head 14 with weight 15 is fixedly connected to upper end of mandrel 1. Head 14 has radial orifices 16 made in upper part thereof. Cap 17 provided with radial pin 18 is installed over the orifices 16. Weight 15 is made as cup put on head 14 and sealing radial orifices 16 so that the orifices 16 may be opened under downward head 14 movement. Through axial grooves 19 are made on outer surface of weight 15. The grooves are adapted for radial pin 18 of head 14 cap 17 receiving. Radial channels 20, which permanently communicate weight 15 interior 21 with ambient space, are made in weight 15. Lower radial channels 23 are created in mandrel 1.
EFFECT: possibility to perform pressure-testing of pipes in low-diameter springs and decreased costs.
FIELD: oil and gas industry, particularly devices for hermetical reservoir isolation.
SUBSTANCE: packer comprises body with central channel and connection pipe provided with shaped slot on outer surface thereof. Packer also has conical depression adjoining connection pipe, movable bush supported by connection pipe and having finger cooperating with shaped slot, as well as spring-loaded centralizer. Slips cooperating with conical depression are connected to spring-loaded centralizer ends. Packer includes upper and lower self-sealing sleeves, check valve, seating tool rigidly connected to tubing string and to body through shear members, hollow sealed rod. The hollow sealed rod comprises radial channels and lower end telescopically sliding inside central body channel. Seating tool is made as connection pipe and has rest on inner surface. Connection pipe interior communicates with ambient space. Hollow rod is closed over radial channels and provided with annular depressions. One annular depression is arranged in lower part, other two ones are located over radial channels. Sealing means is installed in upper depression. Upper and lower springing collars are installed in other two annular depressions. Conical depression of the body is made as upper and lower cones and connection pipe is arranged in-between. Opposite upper self-sealed sleeve and lower sleeve are located over upper cone and under lower cone correspondingly. Centralizer includes upper and lower centering members provided with differently-directed slips. Central channel of the body over self-sealed collar has restriction, which receives hollow rod so that the rod may perform limited axial movement. Radial channels of hollow rod may be communicated with central channel over restriction as hollow rod slides upwards. Upper spring-loaded ring is adapted for adjustable hollow rod fixation as hollow rod slides downwards.
EFFECT: increased simplicity, reliability and manufacturability.
4 cl, 2 dwg
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.