CN216588536U

CN216588536U - Oil well packer

Info

Publication number: CN216588536U
Application number: CN202123165947.2U
Authority: CN
Inventors: 方圆; 李太斌; 姜依卓; 杜思佳; 崔梦醒; 祃小莉; 于金花; 刘学兵
Original assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co Gudao Oil Extraction Plant
Current assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co Gudao Oil Extraction Plant
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-05-24
Anticipated expiration: 2031-12-16

Abstract

The utility model belongs to the technical field of the oil field instrument in the pit, especially, be an oil well packer, including last body and sliding connection be in go up the inside center tube of body, its characterized in that: go up the outside of body and be equipped with the inflation chamber, the upper portion in inflation chamber be equipped with overflow the passageway the outside sliding connection in inflation chamber have the sealed briquetting of deformation that a plurality of annular equidistance distributes, vertical direction is adjacent two the sealed briquetting of deformation distributes in a staggered way, toper runner and direct current way have been seted up in proper order to the bottom of center tube, the inside bottom of center tube has been placed and has been used for right the direct current way carries out the soluble shutoff of shutoff and blocks up, soluble shutoff stopper is including being located the inside soluble conical segment of toper runner and inlay and establish the metal circulation ball of soluble conical segment bottom, the metal circulation ball is located the inside of direct current way. The utility model is used for oil pipe seals with oil, gas well casing annular space and separates sealedly, realizes oil, gas reservoir stratified mining.

Description

Oil well packer

Technical Field

The utility model belongs to the technical field of the oil field instrument in the pit, particularly an oil well packer.

Background

The packer is a downhole tool which is connected on a downhole string and used for packing and isolating an oil pipe and an oil-gas well casing or an open hole well wall annular space, meets the requirements of a certain process technical purpose or oil layer technical measures of an oil-water well, and needs corresponding types of stoppers for oil testing, oil extraction, water injection and oil layer transformation.

The following is compared with the prior patent technology through retrieval:

a packer for oil well fracturing is disclosed as (CN 211008560U), and compensates radial expansion deformation of a rubber cylinder by means of collapse of the rubber cylinder in the length direction, prevents the rubber cylinder from being excessively stretched and thinned in the expansion process to reduce strength, and a check ring is arranged at the lower end of a lower movable outer sleeve of the rubber cylinder, a limit ring table for preventing the check ring from moving towards an upper connector is arranged below a sealing section of the lower connector and the lower movable outer sleeve of the rubber cylinder to limit the moving distance of the lower movable outer sleeve of the rubber cylinder, so that the contact sealing length of the rubber cylinder and a sleeve pipe is prevented from being influenced by excessive collapse of the rubber cylinder, and the quality of seat sealing is ensured.

An oil well packer is disclosed as (CN 211008560U), and the soluble plugging ball is thrown into the inside of a pipeline, at the moment, a central hole is plugged, the pressure is increased along with the continuous entering of a well killing fluid, a central pipe is pushed to move downwards, a one-way valve is opened, the well killing fluid enters an annulus H between a middle sleeve and a corrugated pipe, and the plugging operation is realized through the expansion of the corrugated pipe along with the continuous entering of the well killing fluid. After the shutoff ball dissolved after the certain time, stratum output liquid passes through the centre bore, ground is lifted through the oil-well pump, the device utilizes pressure release structure to guarantee the stability of inflation, prevent that the excessive pressurized of sealing layer from leading to the thin wall condition, but this structure is albeit playing the effect of alleviating to the membrane, because the shutoff ball volume is reducing after dissolving, the centre bore is a line for toper and spherical shutoff ball in fact the contact surface, when the volume shrinks, very easily dissolve incompletely, receive the pressure effect, make the ball that dissolves receive slight change and directly get rid of the release of stop pressure, sealing pressure also removes in step.

The utility model provides an oil well packer, its publication number is (CN 213838575U), this patent utilizes the rotary rod when inside activity, can drive diffusion pole and diffuser plate and remove, then move to the outside through the diffuser plate, make the diameter grow of sealing washer, inside progressively laminating the pipeline, reached the multiple pipeline size of adaptation at last, do benefit to the purpose that multiple pipeline used, but the in-service use degree of difficulty of this patent is too big, because overall structure utilizes mechanical transmission, when in-service use, whole device is located the underground, it is also very troublesome that control gets up.

SUMMERY OF THE UTILITY MODEL

The utility model provides an oil well packer has the soluble structure who utilizes special construction and guarantees that the stability of dissolving adopts piston structure to drive elastic construction and contact surface contact simultaneously and takes place the inflation, and mutual inflation compresses tightly to form complete labyrinth shape sealed for oil pipe seals with oil, gas well casing annular space, realizes oil, gas layer layering exploitation.

The utility model provides a following technical scheme:

the utility model provides an oil well packer, includes body and sliding connection and is in go up the inside center tube of body, the outside of going up the body is equipped with the inflation chamber, the upper portion in inflation chamber is equipped with overflows the passageway, the outside sliding connection in inflation chamber has the sealed briquetting of deformation that a plurality of annular equidistance distributes, two that vertical direction is adjacent the sealed briquetting of deformation crisscross distribution, toper runner and direct current way have been seted up in proper order to the bottom of center tube, it is right to have placed the inside bottom of center tube soluble shutoff that is used for the direct current way carries out the shutoff blocks up, soluble shutoff stopper is including being located the inside soluble conical shape piece of toper runner and inlaying establish the metal circulation ball of soluble conical shape piece bottom, the metal circulation ball is located the inside of direct current way.

The height of the soluble blockage is smaller than the diameter of the widest part of the central pipe, the diameter of the metal circulating ball is the same as the width of the straight flow channel, and the conical flow channel and the straight flow channel are in smooth transition through an arc angle.

A plurality of sliding hole has been seted up to the outer wall annular in inflation chamber, sliding hole inside sliding connection has the control lever, the control lever is close to sliding hole's one end through connecting piston sliding connection be in sliding hole's inside, the control lever is kept away from sliding hole's one end through connect the arc piece with deformation sealing briquetting fixed connection.

The inner wall of the sliding hole is fixedly connected with a damping layer, the connecting piston is connected with the sliding hole in a damping sliding mode, and an inward-retracted type bump used for limiting sliding of the connecting piston is arranged between the sliding hole and the accommodating groove.

The outer end of the sliding hole is provided with a containing groove, and the deformation sealing pressing block is located in the containing groove under the condition that high-pressure liquid is not injected into the expansion cavity.

The length of the sliding hole is larger than the static thickness of the deformation sealing pressing block, and the depth of the accommodating groove is consistent with the thickness of the static deformation sealing pressing block.

The utility model has the advantages that:

1. the gravity that the bottom was great when the input can be guaranteed to the metal circulation ball, make the decline process, guarantee that soluble toper portion that seals the jam moves down until flowing to the toper runner inside, the toper runner is the face contact with conical soluble conical block this moment, the sprue then has metal circulation ball contact cooperation spacing this moment, the surface and the toper runner contact of soluble conical block are sealed this moment, soluble conical block surface slowly dissolves, the toper structure makes to dissolve more orderly, make the time handle more accurate when being convenient for suppress sealed.

2. When suppressing, the sealed briquetting of deformation can be to expanding all around, and then with the sealed briquetting contact of two deformation of horizontal direction and have contact pressure, simultaneously because two sealed briquetting of deformation of vertical direction distribute crisscross, the contact gap between two sealed briquetting of deformation on upper strata this moment is sheltered from completely by the sealed briquetting of deformation of below, vertically also there is contact stress during the simultaneous pressurized, and then form a labyrinth shape of crisscross distribution and seal, make oil pipe and oil, gas well casing annular space seals up and seals, make oil, the gas reservoir realizes the layering exploitation.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

The parts of the device not involved are the same as or can be implemented using prior art.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, and the same reference numerals will be used to designate the same components throughout the drawings, which are provided for the purpose of illustrating the preferred embodiments only and are not to be considered as limiting the present invention.

FIG. 1 is a front sectional view of the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is a schematic perspective view of the tapered flow channel and the soluble plug of the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 2;

fig. 5 is a schematic top view of the present invention.

In the figure: 0. an overflow channel; 1. a pipe body is arranged; 11. an expansion chamber; 12. a slide hole; 13. a receiving groove; 2. a central tube; 21. a tapered flow passage; 22. a straight flow channel; 3. soluble blocking; 31. a metal flow-through ball; 32. a soluble conical block; 4. a deformation sealing pressing block; 5. a control lever; 51. connecting the arc blocks; 52. a piston is connected.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the oil well packer provided by the present invention is made with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, with the specific understanding that: both a and B may be included, a may be present alone, or B may be present alone, and any of the three cases can be provided.

Referring to fig. 1-5, the present invention provides the following technical solutions:

an oil well packer comprises an upper pipe body 1 and a central pipe 2 connected to the inside of the upper pipe body 1 in a sliding manner, wherein an expansion cavity 11 is arranged outside the upper pipe body 1, a flow passage 0 is arranged at the upper part of the expansion cavity 11, a plurality of annular deformation sealing pressing blocks 4 distributed at equal intervals are connected to the outside of the expansion cavity 11 in a sliding manner, two adjacent deformation sealing pressing blocks 4 in the vertical direction are distributed in a staggered manner, a conical flow passage 21 and a direct flow passage 22 are sequentially formed in the bottom of the central pipe 2, a soluble sealing plug 3 used for plugging the direct flow passage 22 is placed at the bottom end of the inside of the central pipe 2, the soluble sealing plug 3 comprises a soluble conical block 32 positioned in the conical flow passage 21 and a metal flow ball 31 embedded at the bottom end of the soluble conical block 32, and the metal flow ball 31 is positioned in the direct flow passage 22; the soluble plug 3 mainly comprises a soluble conical block 32 and a metal circulating ball 31, the soluble conical block 32 and the metal circulating ball 31 are made by a mould, the metal circulating ball 31 can ensure that the gravity of the bottom end is larger when the soluble plug is thrown, so that the descending process can ensure that the conical part of the soluble plug 3 moves downwards until the soluble plug flows into the conical flow passage 21, the conical flow passage 21 is in surface contact with the conical soluble conical block 32, the straight flow passage 22 is in contact fit limit with the metal circulating ball 31, the surface of the soluble conical block 32 is in contact seal with oil, the central tube 2 is forced to descend, but the top surface of the soluble conical block 32 is in contact with the oil to be slowly dissolved, in the whole dissolving process, the contact area between the side surface of the soluble conical block 32 and the conical flow passage 21 is smaller and smaller, and finally, as the metal circulating ball 31 passes through the straight flow passage 22, the pressure is released, the diameter is reduced due to the dissolution relative to the side surface of the spherical soluble block, the sealing ball is in linear contact originally, so that the sealing ball is easy to completely flow out under pressure when not dissolved, the conical structure enables the dissolution to be more orderly, the time is more accurately controlled, meanwhile, the operation liquid is guided to the expansion cavity 11 through the overflowing channel 0, the expansion cavity 11 ejects the deformation sealing pressing block 4 outwards, although the single-layer deformation sealing pressing block 4 cannot completely form a closed annular structure, due to the deformation of the sealing pressing block, the deformation sealing pressing block 4 can expand towards the periphery during extrusion, so that the two deformation sealing pressing blocks 4 in the horizontal direction are contacted and have contact pressure, meanwhile, due to the staggered distribution of the two deformation sealing pressing blocks 4 in the vertical direction, the contact gap between the two deformation sealing pressing blocks 4 in the upper layer is completely shielded by the deformation sealing pressing block 4 below, and meanwhile, the contact stress exists longitudinally during the compression, so that a labyrinth seal in the staggered distribution is formed, meanwhile, pressure still exists between the two walls of the gap, and the device forms and fills the gap through the deformation of the pressing block, so that the oil pipe and the annular space of the oil well casing are sealed, and the oil and gas layer can be conveniently exploited in a layered mode.

Specifically, the height of the soluble plug 3 is smaller than the diameter of the widest position of the central tube 2, the diameter of the metal circulating ball 31 is the same as the width of the direct current channel 22, and the conical flow channel 21 and the direct current channel 22 are in smooth transition through an arc angle; the height that soluble shutoff stopped up 3 is less than the diameter purpose of the widest department of center tube 2 and is in order to prevent that soluble shutoff stops up 3 the condition of transversely blocking to appear, the diameter of metal circulation ball 31 is the same with the width of direct current way 22 simultaneously makes metal circulation ball 31 can not fall down naturally, but can pass through the increase of pressure, thereby make metal circulation ball 31 remove downwards along direct current way 22 and release, can make whole face cooperation more level and smooth through arc angle smooth transition between toper runner 21 and the direct current way 22 simultaneously, it produces the indentation to soluble cone-shaped piece 32 and leads to damaging in advance to avoid appearing the corner.

Specifically, a plurality of sliding holes 12 are annularly formed in the outer wall of the expansion cavity 11, a control rod 5 is slidably connected inside the sliding holes 12, one end, close to the sliding holes 12, of the control rod 5 is slidably connected inside the sliding holes 12 through a connecting piston 52, and one end, far away from the sliding holes 12, of the control rod 5 is fixedly connected with the deformation sealing pressing block 4 through a connecting arc block 51; the sliding hole 12 is mainly in sliding fit with a connecting piston 52 at the tail end of the control rod 5, at the moment, the connecting piston 52 is subjected to liquid pressure to slide towards the outside in the sliding hole 12, and then the deformation sealing pressing block 4 is taken out to the outside through the control rod 5 and the connecting arc block 51, and because the deformation sealing pressing block 4 is not in contact with an oil cavity, the situation that pressure relief is generated due to oil discharge cannot be caused even if the deformation sealing pressing block 4 is damaged.

Specifically, the inner wall of the sliding hole 12 is fixedly connected with a damping layer, the connecting piston 52 is connected with the sliding hole 12 in a damping sliding manner, and an inward-retracted convex block for limiting the sliding of the connecting piston 52 is arranged between the sliding hole 12 and the accommodating groove 13; the purpose of damping layer is mainly in order to make connecting piston 52 can not move about under the condition that does not receive pressure inside sliding hole 12, and then inside taking in groove 13 with the sealed briquetting 4 of deformation promotion before the use, makes whole packer can not appear sealed briquetting 4 roll-off when inserting inside and cause the obstructed condition.

Specifically, the outer end of the sliding hole 12 is provided with a receiving groove 13, and the deformable sealing pressing block 4 is positioned inside the receiving groove 13 under the condition that high-pressure liquid is not injected into the expansion cavity 11; accomodate groove 13 and mainly for accomodating deformation sealing briquetting 4, prevent that deformation sealing briquetting 4 can not produce with the inner wall when whole packer inserts inside and draw the damage.

Specifically, the length of the sliding hole 12 is greater than the static thickness of the deformable sealing pressing block 4, and the depth of the accommodating groove 13 is consistent with the static thickness of the deformable sealing pressing block 4; in order to increase the range of use, the length of the sliding hole 12 is greater than the static thickness of the deformable sealing block 4, so that the sliding hole 12 increases the sliding displacement of the connecting piston 52 by an amount which is mainly the maximum compression length of the deformable sealing block 4, and the depth of the accommodating groove 13 is the same as the static thickness of the deformable sealing block 4 and is mainly used for accommodating.

The utility model discloses a theory of operation and use operation flow:

when the oil well packer is used, a soluble sealing plug 3 is thrown into the center pipe 2, working well liquid is pressurized on the ground through the center pipe 2 by a pump truck, high-pressure working well liquid enters an expansion cavity 11 through a flow passage 0, the liquid is drained to the expansion cavity 11 through a one-way valve to eject a deformation sealing pressing block 4 to the outside, although a single-layer deformation sealing pressing block 4 cannot completely form a closed annular structure, the deformation sealing pressing block 4 can expand around during extrusion due to the deformation of the deformation sealing pressing block, and then the two deformation sealing pressing blocks 4 in the horizontal direction are contacted and have contact pressure, meanwhile, because the two deformation sealing pressing blocks 4 in the vertical direction are distributed in a staggered manner, a contact gap between the two deformation sealing pressing blocks 4 in the upper layer is completely shielded by the deformation sealing pressing block 4 below, and contact stress exists longitudinally during compression, the device forms filling through deformation of a pressing block, so that the annular space between the oil pipe and the oil well casing is sealed, and the oil layer is exploited in a layered mode; the top surface of the soluble conical block 32 is contacted with oil to be slowly dissolved, in the whole dissolving process, the contact area between the side surface of the soluble conical block 32 and the conical flow passage 21 is smaller and smaller, and finally, the diameter is reduced due to the dissolution of the side surface of the spherical soluble block along with the passing of the metal circulating ball 31 from the straight flow passage 22, namely the pressure is released, so that the diameter is reduced compared with the diameter reduction caused by the dissolution of the side surface of the spherical soluble block, the linear contact is originally realized, and the plugging ball is easy to flow into the upper part of the plug of the tail pipe at the lower part of the central pipe 2 under the condition of not dissolving and completely receiving the pressure, and the production of an oil well cannot be influenced; when oil well operation needs the deblocking, suppress operation well fluid through 2 oil jacket annular spaces of center tube with the pump truck on ground, high pressure operation well fluid recovers sealed briquetting 4 of deformation, retracts into upper tube body 1, realizes the deblocking, convenient operation.

While preferred embodiments of the present invention have been described above, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true spirit and scope of the invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, then the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides an oil well packer, includes upper pipe body (1) and sliding connection in the inside center tube (2) of upper pipe body (1), its characterized in that: an expansion cavity (11) is arranged outside the upper pipe body (1), a flow passage (0) is arranged at the upper part of the expansion cavity (11), a plurality of annular deformation sealing pressing blocks (4) distributed at equal intervals are slidably connected outside the expansion cavity (11), two adjacent deformation sealing pressing blocks (4) in the vertical direction are distributed in a staggered manner, the bottom of the central tube (2) is sequentially provided with a conical flow passage (21) and a direct flow passage (22), a soluble sealing plug (3) for sealing the straight flow channel (22) is arranged at the bottom end in the central tube (2), the soluble plug (3) comprises a soluble conical block (32) positioned in the conical flow passage (21) and a metal flow-through ball (31) embedded at the bottom end of the soluble conical block (32), the metal circulation ball (31) is located inside the straight flow passage (22).

2. An oil well packer as claimed in claim 1, wherein: the height of the soluble plug (3) is smaller than the diameter of the widest position of the central tube (2), the diameter of the metal circulating ball (31) is the same as the width of the straight flow channel (22), and the conical flow channel (21) and the straight flow channel (22) are in smooth transition through an arc angle.

3. An oil well packer as claimed in claim 1, wherein: a plurality of sliding hole (12) have been seted up to the outer wall annular in inflation chamber (11), sliding hole (12) inside sliding connection has control lever (5), control lever (5) are close to the one end of sliding hole (12) is through connecting piston (52) sliding connection in the inside of sliding hole (12), keep away from control lever (5) the one end of sliding hole (12) through connect arc piece (51) with deformation sealing briquetting (4) fixed connection.

4. An oil well packer as claimed in claim 3, wherein: the outer end of sliding hole (12) has been seted up and has been accomodate groove (13), deformation seal briquetting (4) are located under the inflation chamber (11) does not pour into the high-pressure liquid condition accomodate the inside of groove (13).

5. An oil well packer as claimed in claim 4, wherein: the inner wall fixedly connected with damping layer of sliding hole (12), connect piston (52) with damping sliding connection between sliding hole (12), sliding hole (12) with it is used for right to receive to be provided with between groove (13) connect piston (52) and slide spacing adduction formula lug.

6. An oil well packer as claimed in claim 4, wherein: the length of the sliding hole (12) is larger than the static thickness of the deformation sealing pressing block (4), and the depth of the accommodating groove (13) is consistent with the static thickness of the deformation sealing pressing block (4).