Packer

FIELD: oil and gas production.

SUBSTANCE: invention refers to oil and gas producing industry, particularly to well installations for repeated, including selective, flow tests of flow string in well. The packer consists of a mandrel with a shaped slot on external surface, where axial short and long sections alternate. Self-packing collar, downstream proof, is assembled on the top of the mandrel; a support is located under the collar. A pressure sealing element in form of an additional self-sealing collar, downstream proof, and a cone rigidly fixed relative to the mandrel are successively arranged under the support on the mandrel. A holder with a guiding pin is arranged on the mandrel below the cone. Along circumference the holder is furnished with spring centralisers and oval sockets which are spring loaded inwards in radial direction by means of springs and are designed to interact with the cone in a working position from inside. A rigid centraliser is assembled on the upper end of the mandrel. A rod cupped from top and furnished with radial holes is screwed into the upper end of the mandrel. A load with a chamber at the bottom is arranged outside the rod. The rod is equipped with fingers assembled above radial holes; while the load is equipped with lengthwise through grooves for the fingers of the rod. The lower part of the load chamber, covering radial holes of the rod leak proof by means of sealing elements, is designed to open radial holes of the rod when the load goes up. Correspondingly, process upper radial channels are made in the load above the lengthwise through grooves and the mandrel below the shaped slot; these channels continuously communicate internal space of the load chamber with external space; also there are made lower process channels below which the mandrel is shut off with an additional load. Axial short and long sections of the shaped slot are interconnected with a closed shaped section.

EFFECT: facilitating flow testing of pipes of smaller diametre, also avoiding packer wedging in flow string during round-trips.

2 dwg

 

The invention relates to the oil industry, namely for well for multiple devices, including interval crimp the tubing in the well.

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 bearing and rigidly United with him by the tip, through which 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, as a means 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 associated with the shaft bearing located underneath 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 in ulki 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, limited functionality, because you cannot work packer in columns of small diameter;

- thirdly, the load is rigidly connected with the packer and has no possibility of deviation from the axis of the barrel, which is in the process of tripping in the hole leads to jamming of the packer in the string of pipe, due to the contact of the lower end of the packer with the inner walls opressively columns, especially when the length of the cargo.

The technical object of the present invention is to reduce the load on the self-sealing cuff in the process of tripping and, as a consequence, reduction of wear and tear, extending the functionality of the of Akira, namely conducting crimp in columns of small diameter, as well as reducing the likelihood of accidents due to possible deviations of the cargo relative to the wellbore during tripping of the packer in the well.

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 below self-sealing cuff that does not pass from top to bottom, a support, a 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 connected with the yoke on its circumference, slips, sprung inward in the radial direction and made interoperable in the working position inside cone, and centralizers, sprung out, the rod with radial holes plugged at the top and connected bottom with the barrel, the load having the camera at the bottom, and axial short and long sections shaped groove is connected between a closed shaped section so that when the axial reciprocating movement of the holder relative to the barrel guide pin is located in a short axial section - transport position, the long axis of the plot figured the first groove - working position.

What's new is that the sealing element is designed as an additional self-sealing cuff, do not let the top down, and the cone is rigidly fixed relative to the stem, and the stem is provided upstream of radial holes with your fingers, and the cargo longitudinal continuous grooves for fingers stem, the lower part of the chamber of shipping, tightly overlapping radial holes of the stock, made with the possibility of opening of radial holes of the rod when moving upwards, and in the cargo above the longitudinal through grooves in the barrel below the curved groove made in accordance with the radial top technological channels, constantly informing the inner chamber of the cargo from outer space, and the lower technological channels, below which the barrel is blocked for more cargo.

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 (see figure 2) and the length of 4 plots. On the top of the barrel 1 are fitted with self-sealing cuff 5, not passing from top to bottom, under which is located a support 6 (see figure 1). Under the base 6 on the shaft 1 are consistently located Aimee sealing element 7 in the form of additional self-sealing cuff, do not let the top down, and the cone 8, rigidly fixed relative to the barrel 1. On the shaft 1 below the cone 8 with the possibility of axial movement is the holder 9 with the guide pin 10. Guide pin 10 is placed in the above figure the groove 2 of the barrel 1. The yoke 9 on the circumference with a spring centralizers 11 and slipcase 12, spring-loaded inside in the radial direction by means of springs 13 and made interoperable in the working position inside cone 8. At the upper end of the barrel 1 has a rigid centralizer 14.

In the upper end of the barrel 1 is screwed into the rod 15, muted top and has radial holes 16. Outside of the rod 15 is installed cargo 17, having the chamber 18 below. The rod 15 is supplied upstream of radial holes 16 fingers 19, and the weight 17 is a longitudinal cross-cutting grooves 20 for fingers 19 of the shaft 15.

The lower part of the chamber 18 of the cargo 17, tightly overlapping radial holes 16 of the rod 15, by means of sealing elements 21 and 22 is accomplished by opening the radial holes 16 of the rod 15 when moving up cargo 17.

In the cargo 17 above the longitudinal end-to-end 20 of the grooves in the barrel 1 below shaped groove 2 is made accordingly radial top 23 technological channels, constantly informing the inner chamber 18 of the cargo 17 with the outer p is USTRANSCOM (figures 1 and 2 not shown), and lower technological channels 24, below which the barrel is blocked by the additional weight of 25.

Axial short, 3 long and 4 parts shaped groove 2 is connected between a closed shaped section 26 so that when the axial reciprocating movement of the holder 9 relative to the barrel 1 guide pin 10 is then axially short section 3 (see figure 2) - the transport position, in the axial longest section 4 shaped groove 2 - position.

Packer works as follows.

At the wellhead guide pin 10 of the casing 9 (see figure 2) establish short in the axial plot of figure 3 of the groove 2 to the transport position.

Further, the packer on the rope 27 (see figure 1) through the cable head (figures 1 and 2 is not shown) down in opressively column pipes (for example, the tubing tube diameter 60 mm)with pre-before lowering the packer into the well to avoid braking and delays increase the weight of the load 17 and the additional cargo 25 through the installation of interconnected articulated several elements from steel round with the condition of their passage in opressively column (figures 1 and 2 is not shown).

The descent of the packer on the rope 27 (see figure 1) in opressively column (figure 1, 2 is not shown) continue to interval where you want to spend apres ovcu, thus the fluid in the well during lowering of the packer, freely flows upward through the inner space 28 of the barrel 1 and the radial holes 16 of the rod 15 in the outer space above the packer, as the cargo 17 does not cover the radial holes 16 of the rod 15, the finger 19 apart in the lower ends of the through axial grooves 20 of the cargo 17, and rigid centralizer 14 centers the packer relative to the axis opressively columns, reducing wear self-sealing cuffs 5 and 7.

Reached the required interval crimp opressively columns, it is filled with the process fluid. Next packer raise about 1 meter up and down, as a result of the operation guide pin 10 (see figure 2) when the lift is moved from the upper part of the axial short section 3 in its lower part and then through the lower part of the closed curved area 18 in the lower part of the axial long segment of figure 4 of the groove 2, and then (when descending) guide pin 10 is moved from the bottom of the axial-long segment of figure 4 of the groove 2 in its upper part. While packer, excluding items 9, 10, 11, 12 and 13 (see figure 1), which remains stationary due to the contact spring centralizers 11 with the inner walls opressively the tubing (figure 1 and 2 is not shown), is moved relative to the workpieces 9, 10, 11,12 and 13 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 13 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 shaft 1. After interaction with the cone 8 slips 13 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 17 cargo drops down relative to the rod 15, is rigidly screwed into the barrel 1, which remains stationary, the load 17 by means of sealing elements 21 and 22 is hermetically closes the radial holes 16 of the rod 15, and the fingers 19 rest against the top end through the axial grooves 20 of the cargo 17. Then seal the wellhead and pumping Assembly (figure 1, 2 is not shown) inside opressively pipe string, raise the pressure to the required level, which affects self-sealing cuff 5 above, and the higher the pressure opressively columns, the greater the pressure acts on the self-sealing cuff 5 and the stronger the self-sealing seal 5 is pressed against the inner wall opressive the emnd columns, this self-sealing cuff 7 performs the role of a safety cuff and eliminates the gaps of the liquid in case of their occurrence through the self-sealing cuff 5. By setting the degree of tightness of casing pipes, pressure drop and the packer by means of the rope 27 is lifted to a height of about 1 m and lower. In the beginning of the lift is raised only to the load 17, and all other parts of the packer remains in place. In the process of lifting 17 open radial holes 16 of the rod 15, and located above the packer process fluid through the above-mentioned radial holes 16 of the rod 15 is directed into the interior 28 of the barrel 1, whence it enters the space below the packer. Lifting 17 continues until the fingers 19 will rest on the upper ends of the end-to-end axial grooves 20 of the cargo 17, the camera 18 17 cargo will be communicated with the radial holes 16 of the rod 15, which excludes portavadie" cargo 17 in its axial movement relative to the rod 15.

Upon further lifting up the cargo packer 17 by means of the fingers 19 pulls the rod 15, which, in turn, is rigidly connected with the barrel 1 and causes the movement of the latter.

The packer by means of the rope 27 continue to raise up, but the guide pin 10 is moved relative to the moving up of the barrel 1 from the top is the first of the axial-long segment of figure 4 of the groove 2 (see 2) in the upper part of the closed curved section 26, and then when the shutter is moved from the upper part of the closed curved area 26 in the upper part of the axial short section figure 3 of the groove 2, translating the packer from the working position to transport position.

While packer excluding items 9, 10, 11, 12 and 13 (see figure 1), which remains stationary due to the contact spring centralizers 11 with the wall opressively pipe string is moved relative to the workpieces 9, 10, 11, 12 and 13 down, and then up.

In the process of pulling packer located above the packer fluid freely flows down through the open radial holes 16 of the rod 15 through the inner space 28 of the barrel 1 and later in podvecerni space (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 14 and bearing 6 centers the packer relative to the axis opressively columns, reducing wear self-sealing cuffs 5 and 7, moreover, due to the fact that the rigid centralizer 14 is in the form of the outer ring of the sampling barrel, which covers a large part of the ring section opressively columns of pipes, greatly reducing the load (the weight of a column of the fluid in the operating number of the nna), perceived self-sealing cuff 5.

The proposed packer allows pressure testing in columns of small diameter pipes. In addition, due to the hinge connection of cargo between itself and the packer they have the possibility of deviation from the axis of the packer, thus avoiding jamming of the packer in the string of pipe while tripping.

Packer, including the trunk with shaped groove on the outer surface with an axial short and long sections, rigid centralizer below self-sealing cuff that does not pass from top to bottom, a support, a 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 connected with the yoke on its circumference, slips, sprung inward in the radial direction and made interoperable in the working position inside cone, and centralizers, sprung out, the rod with radial holes plugged at the top and bottom connected with the barrel, consignment having the camera at the bottom, and axial short and long sections shaped groove is connected between a closed shaped section so that when the axial reciprocating movement of the holder relative to the barrel guide pin is located in a short axial part is ke - transport position, the long axis of the plot figured groove - working position, wherein the sealing element is designed in the form of additional self-sealing cuff, do not let the top down, and the cone is rigidly fixed relative to the stem, and the stem is provided upstream of radial holes with your fingers, and the cargo longitudinal continuous grooves for fingers stem, the lower part of the chamber of shipping, tightly overlapping radial holes of the stock, made with the possibility of opening of radial holes of the rod when moving upwards, and in the cargo above the longitudinal through grooves in the barrel below the curved groove made in accordance with the radial top technological channels, constantly informing the inner chamber of the cargo from outer space, and lower technological channels, below which the barrel is blocked by the additional weight.



 

Same patents:

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FIELD: oil and gas extractive industry.

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EFFECT: simplified construction, broader functional capabilities.

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FIELD: oil and gas industry.

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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.

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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