Packer

FIELD: mining.

SUBSTANCE: packer consists of trunk with shaped slot, of centraliser, of self-sealing collar, of sealing element and of cone. A fixture with a guiding pin is assembled on the trunk below the cone; the fixture is intended to axial displacement. The fixture is equipped with oval sockets around circumference; the sockets are spring loaded internally in radial direction by means of springs and they interact with the cone during operation. A rod, capped from the top and connected below with the trunk, is screwed into the upper end of the trunk. At the top the rod is connected with a load equipped with a chamber in the lower part. The rod has radial openings and fingers located above the openings, while the load has lengthwise pass-through grooves for fingers of the rod. The lower part of the chamber is designed to shut off pressure tight radial openings of the rod, when the load goes down. Two axial short sections of the shaped slot are closed between them so, that the pin is situated within boundaries of the short axial sections - transport position - at axial reciprocal movement of the fixture relative to the trunk at length equal or exceeding length L of the short axial sections. When the fixture goes down relative to the trunk at a distance less, than length L of the short sections of axial parts and at following travel of fixture up, the pin goes to a longer axial section of the shaped slot, directed upward and set off along perimetre relative to the short axial sections - working position. Also the pin travels from working into transport position, when the fixture goes down relative to the trunk at a distance exceeding or equal to length - B of the shaped slot.

EFFECT: increased efficiency at multiple pressurising of production string due to possibility to shut off radial openings of rod pressure tight from outside.

2 dwg

 

The invention relates to the oil industry, namely to downhole devices for multiple interval pressurization performance of the columns.

Known packer (a utility model certificate No. 29090, IPC 7 EV 33/12, publ. Bull. No. 12, 27.04.2003), including the trunk with shaped groove on the outer surface with evenly spaced alternating longitudinal short and long sections, rigidly associated with the shaft bearing located underneath pressure sealing element and a cone mounted on the shaft for axial movement of the yoke and connected with the ring guide pin placed in curly groove and connected with the ring installed in the holder on its circumference, slips, spring-loaded in a radial direction, while the packer is equipped with self-sealing cuff mounted on the shaft above the support, and rigidly United with him tip over who skipped the rod is made with an annular ledge at the bottom of interacting with the tip, and radial holes located above the tip, and the rod is connected with the load, with the camera in the lower part provided with the column space of the well by means of radial holes and the inner space of the rod through the axial channel, blocked by a check valve, in kachestvennostju for ascent and descent using the rope.

The closest in technical essence to the present invention is a packer (patents, utility model No. 37763, IPC 7 EV 33/12, publ. Bull. No. 13 from 10.05.2004, including the trunk with shaped groove on the outer surface with alternating short and long sections, rigidly connected with the barrel support below that pressure sealing element and a cone mounted on the shaft for axial movement of the clip from the guide pin, which is placed in curly groove installed in the holder on its circumference, slips, spring-loaded in a radial direction, self-sealing sleeve mounted on the shaft above the bearing, rigidly connected with the barrel lug, through which is threaded a rod with radial holes located above the tip, the rod is made with annular ledge at the bottom of interacting with the tip, and is connected with the load, with the camera at the bottom, communicated with the inner space of the rod through the axial channel, blocked by the check valve, the load optional bottom fitted rigidly connected with it by a sleeve having radial channels corresponding to the radial channels of the rod, and the bottom of the tapered surface is configured to interact with the inner surface of the self-sealing cuff, while the outer diameter is tulki larger than the diameter self-sealing cuff in the transport position, moreover shaped groove is made closed on one side of the outer surface of the barrel.

In the practical application of these packers found that both analogue and prototype inherent in the overall design drawbacks:

firstly, rapid wear self-sealing cuff during tripping, because in the process of raising self-sealing cuff takes a significant load, because pulling his weight on the liquid column, it is continuously pressed against the inner wall of the production casing, and it reduces the resource practices packer and requires replacement self-sealing cuff;

secondly, the check valve is made in the form of a ball, and when multiple opressovka casing, especially in superfinely wells and in wells with sand and dirt, possible contamination (slush, sand, dirt, slurry) landing seat of the ball and, as a consequence, a leaking pressure testing. In addition, in the process of planting packer sleeve, rigidly connected with the load, bursting out self-sealing sleeve which is pressed against the inside wall of the production string, it is not always weight enough for full and tight pressure self-sealing cuff to the inner wall of the production string, which is also in the children to the non-vacuum moulding. All this reduces the reliability of the packer.

The technical object of the present invention is to reduce the load on the self-sealing cuff in the process of the descent of the lifting operations and, consequently, reducing its wear and increase reliability of the packer.

The technical problem is solved by the proposed packer, including the trunk with shaped groove on the outer surface with an axial short and long sections, rigid centralizer, consistently placed underneath self-sealing cuff that does not pass from top to bottom, the sealing element and the cone mounted on the shaft for axial move up the clip with the guide pin, which is placed in curly groove connected with the yoke on its circumference centralizers, sprung out, with slipcase, spring-loaded inside in the radial direction and made interoperable in the working position with the cone, rod, muted top and bottom connected with the barrel, with radial holes, the load having the camera at the bottom.

What is new is the fact that the stock is supplied upstream of radial holes with your fingers, and the cargo longitudinal continuous grooves for fingers stem, the lower part of the chamber is made with the possibility of a tight overlap of radial holes of the rod when moving down, moreover, the two short axial section shaped groove are closed to each other so that when the axial reciprocating movement of the shroud relative to the stem to a length equal to or exceeding the length of the short axial sections, the pin is located within a short axial sections - transport condition, and when moving down the cage relative to the stem by an amount less than the axial length of short sections and subsequent moving upward, the pin is moved in a long axial section shaped groove, upward and offset along the perimeter of relatively short axial sections, working status, working status when moving down the cage relative to the stem by an amount equal to or greater than the length of the curved groove, the pin is moved in transport condition.

Figure 1 shows the proposed packer in longitudinal section.

Figure 2 - scan figured groove made on the outer surface of the barrel.

The packer consists of a barrel 1 (see figure 1) figure 2 groove on the outer surface with alternating axial short 3 and 3' (see figure 2) and the length of 4 plots. On the top of the barrel 1 (see figure 1) has a rigid centralizer 5, which is consistently below are self-sealing cuff 6, do not let the top down, the sealing element 7 and the cone 8. On the shaft 1 below the cone 8 with the possibility of axial movement is the holder 9 with the guide piece is from 10, which is posted in the above figure the groove 2 of the barrel 1. The yoke 8 is circumferentially provided with slipcase 11, spring-loaded inside in the radial direction by means of springs 12 and having the opportunity to interact in the working position with the cone 8.

In the upper end of the barrel 1 is screwed into the stem 13, muted top and bottom connected with the barrel 1, in addition, the rod 13 has radial holes 14. Top rod 13 is connected to the load 15, having the chamber 16 at the bottom.

The rod 13 is provided upstream of the radial holes 14 by the fingers 17, and the weight 15 is a longitudinal cross-cutting grooves 18 under the fingers 17 of the stem 13.

The lower part of the chamber 16 is made with the possibility of a tight overlapping radial holes 14 of the rod 13 when the cargo is 15 down.

Two short axial section 3 and 3' shaped groove 2 are closed to each other so that when the axial reciprocating movement of the holder 9 relative to the barrel 1 by the length equal to or exceeding the length L of the short axial sections 3 and 3', pin 10 (see figure 2) is located within a short axial sections 3 and 3' transport condition.

When moving down clip 9 relative to the shaft 1 by an amount less than the length L of the short axial sections 3 and 3' and the subsequent moving upward, the pin 10 is moved in a long-axis plot of figure 4 of the groove 2, upward, and cm is the incarnation of the perimeter of relatively short axial sections 3 and 3', - working state. Also from a working condition when you move down clip 8 relative to the stem by an amount equal or greater in length In the curved groove 2, the pin 9 is moved in the transport state.

Unauthorized overflows of liquid during operation of the packer excluded sealing elements 19 and 20 (see figure 1).

Packer works as follows.

At the wellhead guide pin 10 of the casing 9 (see figure 2) is installed in the upper part of the short axial sections 3 and 3' shaped groove 2 - transport condition.

Further, the packer on the tubing pipe (tubing) (figures 1 and 2 not shown) or on the rope 21 (see figure 1) through the cable seal 22 is lowered into the well, while before lowering the packer into the well increasing the weight of the load 15 by mounting between the cable seal 22 and the load 15 - 2-3 pipe tubing (figure 1 and 2 is not shown). The descent of the packer on the rope 21 (see figure 1) in the production casing (figure 1, 2 is not shown) continues until the interval, where it is necessary to conduct the pressure test, while the fluid in the well during lowering of the packer, freely upward through the interior 23 of the barrel 1 and the radial holes 14 of the rod 13 in the outer space above the packer, as the load 15 does not overlap the radial holes 14 of the rod 13 (due to the weight of the packer), while Alec 17 apart in the lower ends of the through axial grooves 18 of the cargo 15, and rigid centralizer 5 centers the packer relative to the axis of the casing, reducing wear self-sealing cuff 6.

Reached the required interval pressurization, production column is filled with process fluid. Further, the packer is lifted by an amount less than the length L, and lowered, as a result of the operation guide pin 10 (see figure 2) when the lift is moved from the upper part of the short axial sections 3 and 3', in the short axial section 3', and then (when descending) guide pin 10 is moved from short axial section 3'upward shift along the perimeter of relatively short axial sections, in a long-axis plot of figure 4 of the groove 2 - working position, packer, excluding items 9, 10, 11 and 12 (see figure 1), which remains stationary due to the contact clipshow 11 of the casing 9, pogrujennyh springs 12 to the inner walls of the production string (figures 1 and 2 not shown), is moved relative to the workpieces 9, 10, 11 and 12, first up and then down.

Upward movement of the guide pin 10 from the bottom of the axial-long segment of figure 4 of the groove 2 in its upper part lasts as long as slips 12 of the casing 9, the spring in the radial direction, its inner surface will not come into contact with the cone 8, placed on the barrel is 1. After interaction with the cone 8 slips 12 clip 9 under the action of the weight of the packer diverge in the radial direction and pressed against the inner wall opressively operational columns (figure 1, 2 is not shown), the locking stationary barrel 1.

Further unloading of the packer cargo 15 is lowered down relative to the rod 13, is rigidly screwed into the barrel 1, which remains stationary, the load 15 through the sealing elements 19 and 20 is hermetically closes the radial holes 14 of the rod 13, and the fingers 17 rest against the top end through the axial grooves 18 of the cargo 15. Then seal the wellhead and pumping unit (figures 1, 2 not shown) inside opressively casing raise the pressure to the required level, which affects self-sealing cuff 6 above, the higher the pressure of the production string, the greater the pressure acts on the self-sealing cuff 6 and the stronger the self-sealing sleeve 6 is pressed against the inner wall of the production string. By setting the degree of tightness of casing pipes, pressure drop and the packer by means of the rope 21 is lifted by an amount equal to or greater than the length of the curved groove, and lowered. In the beginning of the ascent up only the cable seal 22 with the load 15, and all the steel parts of the packer remains in place. In the process of lifting 15 open radial holes 14 of the rod 13, and above the packer process fluid through the radial holes 14 of the rod 13 is directed into the interior 23 of the barrel 1, whence comes in outer space under the packer.

Lifting 15 continues until the fingers 17 will rest against the upper ends of the end-to-end axial grooves 18 of the load 15, the camera 16 of the load 15 is communicated with the radial holes 14 of the rod 13, which excludes portavadie" cargo 15 in its axial moving upward relative to the rod 13. With the further rise of the packer up the load 15 through the fingers 14 pulls the rod 13, which, in turn, is rigidly connected with the barrel 1 and causes the movement of the latter.

The packer by means of the rope 21 continue to raise up, but the guide pin 10 is moved relative to the moving up of the barrel 1 from the top of the long axis of the plot of figure 4 of the groove 2 (see figure 2) in the lower part of the short axial sections 3 and 3'connected by a bottom, and then when the shutter guide pin 10 is moved upward along the short axis section 3 in its top part, translating the packer of the working condition in the transport condition.

While packer excluding items 9, 10, 11 and 12 (see figure 1), which remains stationary due to con the act clipshow 12 of the casing 9 with the wall of the production string, moves relative to the parts 9, 10, 11 and 12 down, and then up.

In the process of pulling packer located above the packer fluid freely flows down through the open radial holes 14 of the rod 13 through the inner space 23 of the barrel 1 and later in podvecerni space (Fig. not shown).

Further, the packer may be moved to a different interval of the well to crimp the tubing or retrieved to the surface.

In the process of retrieval of the packer from the well rigid centralizer 5 centers the packer relative to the axis of the casing, reducing wear self-sealing cuff 6, moreover, due to the fact that the rigid centralizer 5 made in the form of an outer ring of the sampling barrel, which covers a large portion of annular cross section operational columns, significantly reducing the load (the weight of a column of the fluid in the production string), perceived self-sealing cuff 6.

In addition, the proposed packer allows a sufficient degree of reliability to produce multiple test production casing due to the possibility of a tight overlap on the outside of radial holes of the rod load.

Packer, including the trunk with shaped groove on the outer surface with an axial short and long sections, rigid centralizer located after avatele underneath self-sealing cuff, do not let the top down, sealing element and a cone mounted on the shaft for axial move up the clip with the guide pin, which is placed in curly groove connected with the yoke on its circumference centralizers, sprung out, with slipcase, spring-loaded inside in the radial direction and made interoperable in the working position with the cone, rod, muted top and bottom connected with the barrel, with the radial holes, the load having the camera at the bottom, characterized in that the rod is provided upstream of radial holes with your fingers, and the cargo longitudinal continuous grooves for fingers rod while the lower part of the chamber is made with the possibility of a tight overlap of radial holes of the rod when moving down, and two short axial section shaped groove are closed to each other so that when the axial reciprocating movement of the shroud relative to the stem to a length equal to or exceeding the length of the short axial sections, the pin is located within a short axial sections - transport condition, and when moving down the cage relative to the stem by an amount less than the axial length of short sections and subsequent moving upward, the pin is moved in a long axial section shaped groove, directed the up and offset along the perimeter of the relatively short axial sections, - operational state, the operational state when moving down the cage relative to the stem by an amount equal to or greater than the length of the curved groove, the pin is moved in the transport state.



 

Same patents:

FIELD: mining.

SUBSTANCE: released bidirectional packer on cable includes setting tool on cable, stationary bushing with main seat and movable central rod, which is equipped with main stay nut and valve interacting with main seat, movable bushing, two opposing cones, screw-threaded dies connected between them in axial direction and designed to interact with corresponding cones, packer collar and boss made to interact with extraction unit. The stationary bushing is equipped in its middle part with a lengthwise groove, while its ends are equipped with main and additional seats and with upper and lower stops with bypass channels. Also the packer collar is made in form of an upper self-packing collar, is able to travel bottom-up and is located between the upper cone and the upper stop. A lower self-packing collar is situated between the lower cone and lower stop; this collar is able to travel downright; the movable bushing is set on the stationary bushing, it is equipped with a pin inserted into the lengthwise groove of the stationary bushing. Further screw-threaded dies are arranged on the movable bushing, are pressed inwards with spring rings and each of them is equipped with centralisers pressed outward. The central rod is equipped with upper and lower circular grove with the additional stay nut and the valve. The main and additional valves are assembled in corresponding upper and lower grooves and are able to limited displacement between the corresponding stops and interior edges of the corresponding circular grooves; also the valves are pressed from the stops to corresponding main and additional seats. The main and additional stay nuts are arranged at a uniform distance from the pin of the movable bushing and are able to interact with the pin; the boss is rigidly connected to the top of the central rod and is made in form of a cone tapered at the top, on the interior surface of which there is made a closed shaped slot with a groove connecting it with the upper edge of the boss. The setting tool is made in form of a branch with a pin inserted into the shaped slot, which is made so, that at reciprocal movement of the setting tool relative to the boss for the length exceeding the height of the shaped slot, the pin will be located within the limits of the shaped slot; if the length is less, then the pin will go into the groove of the shaped slot at travel upward.

EFFECT: simplification of packer design eliminating implementation of electric engine with cable and facilitating setting and disruption of packer in specified interval of well without special devices.

2 dwg

FIELD: mining.

SUBSTANCE: released bidirectional packer on cable includes setting tool on cable, stationary bushing with main seat and movable central rod equipped with main stay nut and valve interacting with main seat, movable bushing, two opposing cones, screw-threaded dies connected to each other axially and designed to interact with corresponding cones, packer collar, and boss made to interact with extracting unit. The stationary bushing is equipped in its middle part with a lengthwise groove, while at the ends it is equipped with the main and additional seats and with upper and lower stops with bypass channels. Also the packer collar is made in form of an upper self-packing collar allowing bottom-up travel and located between the upper cone and upper stop. A lower self-packing collar is situated between the lower cone and lower stop; this lower self-packing collar travels downright; the movable bushing is located on the stationary bushing and is equipped with a pin inserted into the lengthwise groove of the stationary bushing. The screw-threaded dies are assembled on the movable bushing and are pressed inside with spring rings; the dies are equipped with centralisers, spring loaded outwards. Further the central rod is equipped with upper and lower circular grooves, with additional stay nut and valve; the main and additional valves are placed in corresponding upper and lower grooves and are able to pressure tight limited travel between the corresponding stops and internal edges of corresponding circular grooves; they are pressed from the stops to corresponding main and additional seats. The main and additional stay nuts are arranged at uniform distance from the pin of the movable bushing and interact with the pin. Also the lower stop is equipped with outward spring loaded plates assembled uniformly outside along the perimeter of the lower stop and designed to limited radial movement; the boss is rigidly connected with the top of the central rod. The boss is made in form of the tapered at the top cylinder, on the exterior surface of which there is made a shaped closed slot with a groove connecting the slot with the upper edge of the boss. The setting tool is made in form of a branch with a pin inserted into the shaped slot, which is made so, that at reciprocal movement of the setting tool relative to the boss at the length exceeding the height of the shaped slot the pin will be located within the limits of the shaped slot; if the length is less, then the pin will go into the groove of the shaped slot at travel upward.

EFFECT: simplification of packer design eliminating implementation of electric engine with cable and facilitating setting and disruption of packer in specified interval of well without special devices.

2 dwg

Packer // 2347062

FIELD: oil and gas industry.

SUBSTANCE: invention refers to mechanical engineering and can be used for oil and gas production. Packer includes body, rod, upper and lower switchers, in-body cup and hydraulic cylinder. There is an annular space provided between hydraulic cylinder and rod, and containing a piston. The annular space cavity above the piston is connected to producing string column through the hole formed in the rod. The hydraulic chamber is formed with the hydraulic cylinder and the rod and filled with liquid. Between hydraulic chamber and annular space in the hydraulic cylinder, there is a packing sleeve with a slot used to connect cavity of the hydraulic chamber to the annular space cavity. The slot is stopped with valve arranged in the annular space below the packing sleeve. The valve is supported on the piston mounted below in the annular space and fixed in its initial upper position relative to the hydraulic cylinder with shear screws. The sealing cup is provided on the body between upper and lower protective collars. The upper protective collar is supported on upper switch, and the lower protective collar rests on the hydraulic cylinder through retainer num in-between.

EFFECT: higher downhole performance especially that of several beds with selective processing using number of packers.

1 dwg

Plug packer // 2346142

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil industry, and is intended for temporary covering of well shaft. Plug packer consists of a mandrel with internal cylindrical mining device; on external side of mandrel installed is a sealing element with a stop. Above the latter there is a thrust bush, and between it and the stop - retaining ring with notches. On the mandrel opposite the stop there provided are annular notches with the direction opposite to the ring notches. Below sealing element there located is the main cone with main sockets, locking ring, and additional cone with additional sockets. Main sockets and additional sockets are connected to the main cone and additional cone respectively by means of a dovetailed joint, and to the locking ring edges - by means of T-joint. Mandrel is equipped with stops located along the perimeter and at one and the same level between additional sockets with the possibility of passing through openings provided in locking ring, and interconnected to the main cone when in operating position. Inside the mandrel there telescopically installed is a detachable joint made in the form of a branch pipe with external cylindrical mining device in upper part. In lower part of the mandrel there are radial holes located wherein fixing balls are installed. Plug is made in the form of a blind transverse partition installed inside the mandrel, and a hollow bush rigidly attached to additional cone from the outside. Blind transverse partition and mandrel can be made as one solid part. Balls are interconnected on the one side to detachable joint, and on the other one - to hollow bush. By means of shear elements, the mandrel is connected to detachable joint and main cone. On the stop from above there is a casing of setting tool rested. Detachable joint is plugged from above, and setting tool rod is made hollow, and connected to mandrel by means of a breaking element. From below, the hollow cylinder is borne against the hollow transverse partition downwards by means of a spring, which is located inside on the lower end of the mandrel, at that spring is in a compressed position. Mandrel below hollow transverse partition is equipped with a vertical through slot wherein installed is a pin with the possibility of axial movement. On one side, pin is rigidly connected to additional cone, and on the other one - to spring-loaded hollow cylinder. Sealing element is made in the form of barrel-shaped seals separated from each other with a support ring.

EFFECT: saving of time required for removal, avoiding unnecessary lowering and raising operations, as well as guaranteed removal of plug packer out of the well.

3 dwg

Drillable packer // 2344270

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil and gas production industry and is intended for overlapping of intertubular space and performance of isolating works in case of wells overhaul. Drillable packer contains shaft with notches on external surface, the following components installed on shaft - combined sealing element, extrusion washers, upper and lower rupture screw-thread dies, movable upper and fixed lower supports, fixator in the form of split spring rings in annular bore of movable support. Packer shaft is equipped by left sub with calibrated annular bore and nipple in axial channel, which is rigidly connected to left sub and equipped with fitting valve in axial channel in the form of sleeve with dead bottom and radial holes covered with bushing equipped with throttle. Bushing is connected to sleeve by calibrated shear element. Bottom support is equipped with spring-loaded check valve in the form of body with plug in middle part and radial holes, elastic sealing collar at the lower end, installed with the possibility of interaction with seat in axial channel of lower support.

EFFECT: increase of intertubular space sealing reliability, and also increase of fitting tool functional resources by its multiple usage.

3 cl, 4 dwg

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

FIELD: mining.

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.

17 cl

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.

1 dwg

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

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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