Collar formations separator

FIELD: machine building.

SUBSTANCE: invention relates to collar formations separator. Collar formations separator includes housing with sealing collar installed in it with upper end lowered in well on casing string and fixed on it with locking elements, made in form of funnel. Housing is made in form of casing string centralizer, which upper cylindrical part is made with inner annular groove, in which collar tail part is installed and fixed with locking elements. Collar is made in form of cylinder. Gap between collar upper and lower parts is made corrugated in longitudinal direction with conditional outer diameter smaller, than well shaft diameter, and in working position, its diameter is greater than or equal to well shaft diameter.

EFFECT: technical result is creation of reliable and leak-tight formations in well separation device.

5 cl, 4 dwg

 



 

Same patents:

Hydraulic packer // 2555846

FIELD: oil and gas industry.

SUBSTANCE: intended for disconnection of the well casing string between the submerged pump and equipment for produced fluid separation from mechanical admixtures, and can be also used during development and operation of the oil and gas wells. The hydraulic packer contains stock with thread ends, installed on stock sealing assembly containing stop, movable sleeve and installed between them sealing element, and hydraulic drive containing a hydraulic cylinder and valves system. At that end part of the spring-loaded piston of the hydraulic cylinder is located in the internal boring of the movable sleeve. On the hydraulic cylinder lid a ball check valve and differential valve are installed, they are hydraulically connected with each other by the common chamber connected with output of the submerged pump. At that the differential valve is provided with radial channel, that during shutdown of the submerged pump connects the above piston cavity of the hydraulic cylinder with annulus.

EFFECT: improved design of the hydraulic packer, improved comfort o maintenance.

2 cl, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: packer for creation of the gravel filter includes cross-over unit containing the nipple with side holes blocked by a bushing moving along the nipple, the sealing unit comprising the sealing collar with anchoring devices, the core enclosing the collar and located inside the guiding bushing and the pre-coat unit containing a slide valve. The core and the guiding bushing are implemented with a possibility of compression of a sealing collar at their shift with reference to each other. Also the packer contains the pre-coat tube leaning by end face on the end face of the housing of the slide valve of the pre-coat unit and passing inside the core of the sealing unit and inside the nipple of cross-over unit with a possibility of formation of through passage channel in the packer. The pre-coat unit also contains the insert with pre-coat windows located between the external surface of the housing of the slide valve and the internal surface of the cylindrical base with pre-coat windows. On the lateral surface of the housing of the slide valve two rows of process holes are implemented, and process holes of one of rows are located opposite to the process holes implemented in the insert which is rigidly fastened to the cylindrical base. Pre-coat windows of the base are located opposite to pre-coat windows of the insert. From the one side the insert encloses the face part of the pre-coat tube, and from the other side it has the through hole the diameter of which is less than the diameter of the pre-coat tube. And the through hole is implemented with a possibility of installation in it of the flushing tubes used in the assembly of configuration of the underground equipment for creation of the gravel filter.

EFFECT: improved device reliability.

6 dwg

FIELD: oil and gas industry.

SUBSTANCE: device for the borehole sealing includes a well screen unit having the upper end and a segment of an imperforated bearing tube close to the upper end, a withdrawable unit, a mechanical packer and a bypass tool and a swellable packer. The withdrawable unit is placed at the upper end of the imperforated bearing tube. The Bypass tool is placed over the withdrawable unit. The swellable packer is made of a swelling material fixed to the outer side of the imperforated bearing tube and has the first diameter and the second diameter bigger than the first one. The device is made with the potential gravel packing of the well before installation and further removal of the mechanical packer, injection of gravel slurry through the bypass tool to the annular space between the well screen unit and the wellbore wall and sealing of the annular space by the swellable packer. Removal of the mechanical packer and the bypass tool is made by means of the withdrawable unit disconnection.

EFFECT: invention ensures perfection of the device design that does not require additional round trips.

22 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: mechanical isolation packer includes composite rod with ends for thread, isolation unit installed at the rod, which includes a fixed cylindrical stop with outer cone area, guide sleeve with inner cone area having sizes matched to sizes of outer cone area of cylindrical stop and sealant placed in-between as well as sleeve with pin placed in the rod cam slot, the sleeve is fixed from longitudinal movement in regard to the rod and installed so that it may be rotated axially, and braking section. At that sealant is placed at the rod inside housing fixed in guide sleeve by four pins and due to this housing may be moved longitudinally in grooves of guide sleeve.

EFFECT: improved convenience in packer maintaining as additional ground equipment is not required anymore for this purpose.

7 cl, 2 dwg

Soluble bridge plug // 2553717

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the bridge plug to be installed in the well limited by the casing string. The bridge plug includes integrity component to maintain the anchor integrity or structural integrity in the well during usage creating pressure in its top part, at that the specified component is made with possibility of dissolution in the well and out of the material containing chemically active metal, that is selected from a group including aluminium, calcium, magnesium, and alloying element.

EFFECT: invention ensures drilling of the bridge plug.

23 cl, 5 dwg

FIELD: mining.

SUBSTANCE: device comprises a housing with a channel, elastic sealing elements mounted therein on it, between which a piston pair with the sealing rings is placed, and the retaining nut. The working chamber of the piston pair is connected with the housing channel, and in its cylinder a radial hole is made with the ability of communication with the working chamber of the piston pair when packing the well with elastic sealing elements and the additional compression of the elastic sealing elements when hydraulic fracturing pressure with self- locking of the isolated part of the well. The elastic sealing elements are made of soft material and reinforced with rigid elements with different elastic properties.

EFFECT: increase in the sealing capacity of the device and the elastic properties of the elastic sealing elements.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention relates to plugs for the drilled wells where the fluid flows upwards. Plug (102) with walls (104) contains pipe (112), that can be inserted in the drilled well (102), at least one diaphragm (106) out of material impermeable for fluids. At that at least one diaphragm (106) if secured impermeable for fluids in the pipe (112). At that this at least one diaphragm (106) can take state folded in the direction of pipe (112) and state unfolded in the direction from pipe (112) to walls (104). At that the pipe (112) and specified at lest one diaphragm (106) are made such that in state folded in direction to pipe (112) of the specified at least one diaphragm (106) there is a gap (108) between the specified at least one diaphragm (106) and walls (104), when the pipe (112) is inserted in the drilled well (102). At that the specified at least one diaphragm (106) has at least one fixing element. At that hardness of the specified at least one fixing element exceeds hardness of walls (104), so the specified at least one fixing element (302) can penetrate in walls (104), when the specified at least one diaphragm (106) is pressed to walls (104). At that connection with geometric closure between the specified at least one diaphragm (106) and walls (104). Is ensured besides, the plug contains activated means. At that activation of the activated means results in that specified at least one diaphragm (106) can accept state unfolded in direction from pipe (112) to walls (104).

EFFECT: increased efficiency of the well disconnection in case of damages.

4 cl, 6 dwg

FIELD: oil and gas industry.

SUBSTANCE: horizontal well formation treatment device includes a packer containing a through-way housing in an axial direction, which has a shaped slot on outer surface, a yoke with a pin and slips; with that, the pin is installed into the shaped slot and has a possibility of being moved along the shaped slot trajectory, an elastic cuff located between upper and lower supports. The upper support of the packer housing is rigidly connected to a disconnector. The disconnector includes a shaft with radial holes, with upper and lower threads and a spool-type valve located inside the shaft and a shear element connected to it. The spool-type valve is provided with an axial central hole and a mounting seat for a free-fall element dropped inside the device prior to treatment of the formation located above the packer. The lower ring is made in the form of a cover plate screwed on the lower thread of the disconnector shaft. The cover plate is equipped from below with external thread for connection to the passage-through packer housing, and the cover plate is equipped in its centre with a pin rigidly fixed on it and directed towards the spool-type valve, as well as axial holes in a circumferential direction. Carrying capacity of these holes is higher than that of the central hole of the spool-type valve, and the pin has a possibility of tight interaction with the axial central hole of the spool-type valve after the free-fall element is put on the seat of the spool-type valve and axial movement of the spool-type valve relative to the disconnector shaft. The elastic cuff is made in the form of two sealing rubber elements separated from each other with a metal washer. Upper and lower supports are made in the form of plates with a possibility of preventing flowing of the sealing rubber elements beyond their limits at fitting of the packer. Upper and lower supports are provided with flattened cones put at fitting of the packer on the sealing elements of the elastic cuff. The flattened cone of the upper support is directed with its apex in a downward direction, and the flattened cone of the lower support is directed with its apex in an upward direction. The disconnector shaft is provided with two internal annular grooves provided with split-type spring stop rings having a possibility of fixation of the upper end face of the spool-type valve after axial movement of the spool-type valve relative to the disconnector shaft. The free-fall element is made in the form of a stock provided from below with a semi-sphere above which there rigidly installed on the stock is a split-type centraliser made from reinforced rubber, and above the centraliser there rigidly installed on the stock is a solid sealing rubber ring.

EFFECT: horizontal well formation treatment device allows eliminating non-tight fit of the packer of the device in a horizontal formation of the well or loss of tightness of the packer during operation of the device, as well as enlarging functional capabilities of operation of the device and improving its operating reliability.

6 dwg

Circular web // 2550612

FIELD: oil-and-gas industry.

SUBSTANCE: set of invention relates to circular web systems for expansion in ring-like space between well tubular structure and wellbore inner wall. Circular web comprises tubular section of the well. Expanding coupling covers said tubular section and has inner surface facing said tubular section. Note here that every end of expanding coupling is connected with connecting section connected with tubular section. There is the space between coupling inner surface and tubular section. The element is connected with said coupling. Note here that said element has first and second sections located nearby said inner surface. Note also that element first section is secured to said inner surface. Note that second section extends into said space from first section.

EFFECT: higher hardness of said coupling.

19 cl, 27 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry. To increase tightness of the packer installation in the well the supporting mechanical packer contains body, connected telescopically by means of the cuffs with the support nipple with possibility of their axial movement between each other. The body has a ring seal, connecting coupling, adjustment nut with top pressing ring stop installed in the coupling with possibility to adjust position of the ring seal on the body between stops on the adjustment nut and bush connected with support nipple. In the bush a stepped surface is made resting by step projection against collar on the body. On the collar a groove is made, it interacts with shear pins installed in the bush. On the body triangular notches are made, they interact with collet inside which the counter triangular notches and external cone are made. The collet is located in the cavity of the bush with rest against end of the supporting nipple, and is held against axial movements by lock ring with internal cone interacting with the external cone of the collet to fix the ring seal in compressed state, with possibility of movement along the body to length exceeding compression of the ring seal with radial expansion till tight disconnection of the well cavity. The lock ring is made with groove for additional shear pins installed in the bush.

EFFECT: invention can be used to disconnect the well cavities by packers with radial expansion under axial pressure.

3 cl, 1 dwg

Packer // 2245986

FIELD: oil and gas extractive industry.

SUBSTANCE: packer has body in form of pipe, whereon collar compactors are placed with limiting washers, saddles for locking tool dropped from surface, cover, upper and lower fixing elements, made in form of anchoring assemblies, upper conical bushing, rigidly connected to pressing bushing and movably to the body, lower conic bushing, made rigidly together with body, guide of this conic bushing made in form of plate spring, placed by one end moveably in guiding groove in lower portion of lower die with teeth, and by other end fixed rigidly on greater diameter of this conic bushing, auxiliary pipe, placed inside the body. Packer in lower portion is provided with check valve, placed inside recess of body, concurrently being also the body of valve. Oppositely to valve saddle on same axis stepped locking bushing is placed with possible sliding inside body recess with limited drive and possible overlapping of radial grooves made in body, which, in its turn, is rigidly connected to auxiliary pipe via shear pin. Between stepped locking bushing and saddle compression spring is placed. Fixing elements of collar compactors are made in form of comb with inner teeth and outer conic generators in nose portion. On the side of collar compactors these are enveloped by inner conic portion of compression bushing, in its turn rigidly connected to upper conic bushing, and on the other side combs with inner teeth are placed sliding-moveably in radial grooves of guiding bushing placed between ends of upper conic bushing and inner conic portion of compression bushing with possible engagement by inner teeth of comb to slanting walls of body groove and interaction to all elements of this assembly.

EFFECT: higher reliability.

5 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: system has upper and lower packers, each of which has body, shaft, anchor, compactors, and pipes, placed between packers. In shaft of upper packer a copier is made with fixing device of transporting and working position of anchor and a sub. The latter is mounted with possible axial displacement and rotation around the copier. Sub is placed on pipes between packers, mated to lower packer and has no capability for axial rotation and displacement relatively to their axis in operating position of lower packer. On lower packer shaft a copier is made with possible axial displacement with it for interaction with anchor and its displacement from transporting position to operation position.

EFFECT: simplified construction, broader functional capabilities.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: stand has imitators of casing and lifting columns with packer between them, means for heating casing column imitator, main hydraulic cylinder for axial loading and unloading of packer, pumps to create pressure. Stand is provided with additional hydraulic cylinder with hollow rod and cylinder, connected to rod of min hydraulic cylinder. Additional hydraulic cylinder is encased in the body, rigidly connected to main hydraulic cylinder and imitator of casing column. In additional hydraulic cylinder a ring-shaped piston is placed with conical skirt, interacting with keys with possible periodical supporting against the body through windows in said cylinder and below keys spring-loaded ring-shaped pusher is moveably mounted. In hollow of imitator of lifting column a floating piston is positioned, this hollow and hollow of the hollow rod are interconnected and also connected to hollow above ring-shaped piston.

EFFECT: broader functional capabilities, higher efficiency.

7 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device includes hollow body with a row of vertical apertures, a collar, pusher bushing, placed on body with possible interaction with collar, cone, mounted on the body, cylinder, connected to cone, screw-thread dies with die holder, mounted on the body with possible extension of dies in radial direction during interaction with cone, saddle and shear screws. According to invention in die holder additional through radial apertures are made, wherein sockets are mounted with possible extension in radial direction. Inner hollow of die holder is connected to inner hollow of body by a row of radial apertures. In pusher bushing through radial apertures are made, wherein sockets are mounted with possible extension in radial direction. Pusher bushing is rigidly fixed to the body, and its inner hollow is connected to inter-tubular space below the collar.

EFFECT: higher reliability, durability and lower cost.

3 dwg

FIELD: oil industry.

SUBSTANCE: device has body with radial apertures, two compacting assemblies thereon and valve assembly between them. Each compacting assembly comprises a collar, stopping branch pipe, cylinder, forming a ring-shaped hollow with the body, wherein a bushing is placed. In upper compacting assembly ring-shaped hollow is covered by plug from lower side, which is fixed in cylinder and interacts with collar, cylinder is connected to body by cams, placed in radial apertures of plug and in ring groove of body, bushing is made stepped, long step of which interacts with cams and is fixed by shear screws from displacement in ring plane, which is connected to well. In lower compacting assembly bushing is provided with holder, on the body a cone is mounted, interacting with sockets, placed in grooves of stopping branch pipe, which is fixed on the body by shear screws.

EFFECT: higher reliability.

2 cl, 4 dwg

Two-packer device // 2249669

FIELD: oil and gas industry.

SUBSTANCE: device has shaft with radial channels and return valve, upper and lower compacting elements. Inside the shaft a hollow spring-loaded moving rod is placed. It has radial apertures and recesses. Between apertures a throttle is rigidly placed. On upper portion of rod a piston is placed. Working hollow, formed between rod with piston and barrel, fixed on inner portion of shaft, is connected to above-packer space of well by radial aperture, made in barrel wall. Working hollows of upper and lower compacting elements are connected by axial channel, made in shaft and ring channel, formed between inner and outer pipes, connecting lower compacting element to the shaft. On upper portion of pipe through radial apertures are made and cylindrical recess, matching rod diameter, in which rod a plug is place. Outer diameter of upper end portion of rod equals outer diameter of lower rod portion.

EFFECT: higher reliability.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: packer has body, in which electric engine, reducer with output shaft, connected to screw couple, which is connected to traction, having holding rods on lower portion with spring for transfer of axial force to central rod, having a shelf in upper portion as well as recess and cuts, and in inner portion - compacting rings and stopping nut, are positioned. Packer has shell, having conical surface on inner portion, special part with shelves, shear ring placed in grooves of said special part and holding segments, immobile bushing connected fixedly to special part. Packer has packer rubber, saddle, rigidly connected to special part, moveable flange and two cones, placed oppositely to each other, dies, moveably placed on cones, traction, jointly connected to dies, branch pipe, fixedly placed on body, moveable bushing, balls, pressed by spring and screw for connection of special part to shell, cable of rope, being a carrying cable and feeding electric engine via filament, shear washer, pressed by nut. When packer is removed, engaging assembly is utilized, which includes pusher, screwed on lower portion of screw couple screw, cut holder and cover. Through apertures are made on special part and moveable flange for connection of above-packer and below-packer well hollows.

EFFECT: lower costs and simplified maintenance.

6 dwg

Packer // 2251614

FIELD: oil production industry, particularly means for dividing an annular space and a tube space in flowing, gaslift, and beam wells.

SUBSTANCE: packer includes shaft with outer bored surface and bead and sealing members supported by the bead. Packer also has air cylinder forming annular cavity together with packer shaft. Cavity is connected with shaft interior through radial channels. Packer includes anchoring means. Lower anchoring means includes cone with slips and slip holder having bored inner orifice and threaded orifices. Lower anchoring means rests upon the bead and is connected to the shaft by shear screws installed in threaded orifices of slip holder. Shaft defines inner bored diameter and includes sliding bush located inside shaft. Shaft is provided with lower and upper grooves for sealing rings receiving and with outer grooves for cams and additional shear screws installation. Outer grooves are located between lower and upper ones. Slots are formed below bead on outer shaft surface for installing cams with limited radial travel. Threaded orifices are formed on outer shaft surface above inner groove thereof. Arranged into groove are additional shear screws to secure sliding bush in its initial position. The slip holder is freely installed on shaft or is spring-loaded. Support-moving bush is installed in inner bored orifice of slip holder between shear screws and cams. Support-moving bush is provided with facet formed from cam side and contacts with cams along mating facets upon shearing of shear screws. Free travel between cams and end of support-moving bush exceeds shear screw diameters to provide shearing thereof. When sliding bush is installed in fixed position cams extend above an outer shaft surface generator to provide displacement of support-moving bush and cut of shear screws. When sliding bush is located in operating position cams are located below outer shaft surface generator and move in radial direction into outer groove of sliding bush to provide free cam movement under support-moving bush and shear screws.

EFFECT: reduced number of lowering and lifting operations and breakdowns in the case or packer separation or during packer pulling out of well.

18 cl, 7 dwg

FIELD: oil and gas industry.

SUBSTANCE: device has body, made in form of branch pipe with elastic collar mounted on it, expanding assembly with cone, shear element, gear, lowered on pipes column into additional casing column and interacting with expanding assembly from above. Expanding element is positioned in upper portion of branch pipe and locked with its cone directed downwards, gear is made in form of pusher in lower portion and anchor assembly in upper portion. Pusher is made in form of hydraulic cylinder, made with possible pressure from above on expanding assembly and provided with piston and hollow rod, which is connected to piston rigidly, and to pipes column - hermetically with possible upward axial displacement. Anchor assembly is made in form of dies, mounted on hollow rod with possible radial movement outwards during movement of hollow rod upwards relatively to pipes column. Shear element holds hollow rod relatively to pipes column during lowering into well.

EFFECT: simplified construction, lower costs.

1 dwg

FIELD: mining industry.

SUBSTANCE: device has packer, mounting tool and anchor assembly. Packer expander is mounted in upper portion of body, and anchor assembly - above hydraulic chamber of mounting tool. Hydraulic chamber cylinder is mounted with possible displacement relatively to rod and hydraulically connected to inner space of device. Body of anchor assembly is provided with sockets, in which spring-loaded dies are mounted, which are activated by hydraulic effect formed in tubing pipes column, on which device is lowered into well.

EFFECT: simplified construction, higher reliability, higher efficiency.

1 dwg

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