Downhole hydromechanical packer

 

The invention relates to the oil and gas industry and used in the construction and repair of wells, in particular to a device for isolation of closely spaced productive strata and the elimination of water during workover. The technical result is a reliable isolation of closely-spaced layers and the possibility of leaving the packer in the well. The packer includes a housing, gasket, anchor node, the mechanism spacerace and shear sleeve with the saddle under the locking element. The anchor node includes an anchor and a conical sleeve. The mechanism spacerace has tabs with persistent threads on the inner surface for engagement with the thrust threaded outer surface of the shell and placed in the housing of the control sleeve. It is associated with anchor sleeve by pins arranged in the longitudinal slots of the housing. Cone sleeve has an outer conical surface with a taper of less than 5° to interact with the anchor sleeve and the inner conical surface for engagement with the latches. On the upper part of the body may be a check valve, having left the trapezoidal thread for connection with the circulation valve is>p style=" page-break-before:always;">

The invention relates to the oil and gas industry and used in the construction and repair of wells, in particular to a device for isolation of closely spaced productive strata and the elimination of water during workover.

Known packer PV-AGM (Mamedov, A. A. Preventing violations of casing. M.: Nedra, 1990, S. 235-238), containing the rod to the upper part through which the thread is attached to the cylinder and to the lower valve housing site. Shanks clipshow interact with the yoke. Grooves for clipshow in the head and in the cage is made of dovetail” that prevents hair loss clipshow.

This packer has several disadvantages, namely consists of a large number of elements of a complex structure, not designed for isolation of closely spaced productive strata and for abandonment of the well.

The closest in technical essence and the achieved result is a packer, drilled for carrying out insulation works by injection of plugging material (RF patent No. 2128278, E 21 33/12, 1997). The packer includes a housing, made with a mounting seat, a sealing cuff, the anchor node located between plot Edom for shut-off valve and cylinder with the annular protrusion, forming with the rod and the piston chamber, chamber connected with in-line space through the radial channel. The hollow stem has a removable valve made interoperable with the landing place of the body.

The claimed invention is directed to solving the problem of improving the reliability of the packer, to simplify the design by reducing the number of parts to ensure reliable isolation of closely-spaced productive layers and the possibility of leaving the packer in the well.

For this purpose downhole hydromechanical packer, comprising a housing, gasket, anchor node, including the anchor cone and sleeve mechanism spacerace and shear sleeve with the saddle under the locking element, the mechanism spacerace has tabs with persistent threads on the inner surface for engagement with the thrust threaded outer surface of the shell and placed in the housing of the control sleeve associated with the anchor sleeve by pins arranged in the longitudinal slots of the body, and a tapered sleeve has an outer conical surface with a taper of less than 5° to interact with the anchor sleeve and the inner conical surface for engagement with the latches.

Also the circulating valve the left switch, and all elements of the packer is made of easily drillable materials.

The drawing shows a downhole hydromechanical packer with a longitudinal incision.

The packer includes a housing 1, on the upper part of which a check valve 2 with a bore 3 under saddle locking element (not shown). Check valve 2 through the left trapezoidal thread connected with the circulation valve - left disconnector 4, which in turn connects to the drain of the column, for example column tubing (not shown). Sealing gasket 5 is installed on the housing 1 and fixed bottom support plate 6. The anchor node, including anchor sleeve 7 and a conical sleeve 8. Tapered sleeve 8 has an outer conical surface 9 with a taper of less than 5° and the inner conical surface 10. The mechanism spacerace has the tabs 11 with persistent threads on the inner surface for engagement with the thrust threaded outer surface of the housing 1 and mounted in the housing 1 by means of the transport pins 12 of the control sleeve 13 that is associated with the anchor sleeve 7 by means of pins 14 arranged in the longitudinal slots 15 of the housing 1. On top of the control sleeve 13 poset as follows. After you release the packer on the tubing pipe to the desired depth is used to wash and scan parameters mud. Then reset the shut-off element 19 and the locking element (not shown) check valve 2.

After landing shut-off element 19 on the saddle 18 raises the pressure in the tube space of 4-5 MPa above is working and cutting transport pins 12, which is fixed management bushing 13. For the first stage of spacerace need inside the tubing to create pressure 21-22 MPa. The force created by this pressure (about 6 tons), is transmitted through the three pins 14 passing through slots in the housing 1, the anchor sleeve 7, slide on the tapered sleeve 8. Next, the force is transferred to the gasket 5, the last patroit annulus.

For reliability spacerace proceed to the second stage, putting the necessary effort in excess of the weight of the tubing. When the movement of the housing 1 up there is a maximum anchoring and simultaneously necessary spacerowa. Then additionally applied load on the tubing is removed and due to buttress threads on the housing 1 tabs 11 Saladar>With further increase in pressure above 22 MPa is cutting studs 16 shear sleeve 17 with the locking element 19 and opens the message tubular space with the layer that you want to isolate.

All items downhole hydro-mechanical packer is made of easily drillable materials (for example: cast steel, duralumin, aluminum, etc.), and the design of the packer allows you to leave it in the well.

The use of the invention will improve the reliability of the packer, to simplify the design by reducing the number of parts to reduce the cost of its drilling. This downhole hydromechanical packer will enable you to reliably isolate nearby reservoirs.

Claims

1. Downhole hydromechanical packer, comprising a housing, gasket, anchor node, including the anchor cone and sleeve mechanism spacerace and shear sleeve with the saddle under the locking element, characterized in that the mechanism spacerace has tabs with persistent threads on the inner surface for engagement with the thrust threaded outer surface of the shell and placed in the housing of the control sleeve associated with the anchor sleeve means is here with a taper of less than 5° to interact with the anchor sleeve and the inner conical surface for engagement with the latches.

2. Packer under item 1, characterized in that on the upper part of the housing a check valve, having left the trapezoidal thread for connection with the circulation valve - left switch.

3. Packer under item 1 or 2, characterized in that all the elements of the packer is made of easily drillable materials.

 

Same patents:

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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.

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FIELD: oil and gas extractive industry.

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EFFECT: higher reliability, durability and lower cost.

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FIELD: oil industry.

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EFFECT: higher reliability.

2 cl, 4 dwg

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FIELD: oil and gas industry.

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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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