CN215979294U - Integral differential pressure grading hoop with packer - Google Patents

Abstract

The application discloses an integral differential pressure grading hoop with a packer, which comprises the packer, a body, a closing sleeve, an opening plug seat and a closing plug seat, wherein the closing sleeve, the opening plug seat and the closing plug seat are arranged in the body; the closing sleeve is sleeved in the body, and the opening plug seat and the closing plug seat are oppositely arranged at two ends of the inner part of the closing sleeve; a body circulating hole is formed in the side wall of the body, and a closing sleeve circulating hole is formed in the side wall of the closing sleeve; opening the body circulation hole and the closing sleeve circulation hole by the relative movement between the opening plug seat and the closing sleeve; closing the body circulation hole and the closure sleeve circulation hole by relative movement between the closure sleeve and the body; still including promoting the nipple joint, promote the nipple joint and set up the both ends at the body with the packer is relative, and the one end that the body was kept away from to the promotion nipple joint still is provided with the connector. The setting up of promotion nipple joint has made things convenient for operations such as centre gripping, transport to hierarchical hoop in this application, and the efficiency of construction has been promoted greatly in convenient construction.

Description

Integral differential pressure grading hoop with packer

Technical Field

The utility model belongs to the technical field of petroleum drilling and well completion, and particularly relates to an integral differential pressure grading hoop with a packer.

Background

With the development of drilling technology, the number of complex wells such as deep wells, directional wells, highly deviated wells and the like is increased gradually, and the well cementation technology faces more challenges and difficulties. The staged cementing process technology is that a special cementing tool staged cementing device is installed at a certain set position of a casing string in a well, and cementing is respectively carried out on annular spaces of casing pipes at the upper part and the lower part of the staged cementing device by a special process during cementing, so that a longer cement isolation well section is divided into two sections for sealing. The staged well cementation is mainly suitable for well cementation operation under the well conditions of too long one-time cementing sealing section, easy loss of a well under low pressure, too large temperature difference between an upper well section and a lower well section, discontinuous oil-gas distribution, too long spacing distance and the like.

Because part of the target layer of the oil-gas well is buried deeply, the section of the open hole is long in one-time sealing, the annular liquid column pressure in the well cementation operation is high, and the leakage is easy to occur because the annular liquid column pressure exceeds the stratum pressure-bearing capacity; even if the graded well cementation technology is adopted, for a well bore with a plurality of pressure layer systems, the deep well graded well cementation is still difficult to avoid leakage accidents. Although the existing staged cementing tool and the products of the external casing packer are mature, the tool and the packer are mainly matched and used in half-range well cementing operation such as cementing on the top of a sieve tube, and the tool structure and the matched process are difficult to be matched and used in the staged cementing operation, and cannot meet the annular mechanical sealing requirement in the staged cementing operation.

The first method adopts a conventional staged cementing device and a packer to be used in series, and the packer is arranged below the staged cementing device on a pipe string structure, so the method has the defects of needing to operate two tools respectively, complex operation, non-compact structure and limited use condition; the second, stage cementing ware and packer design formula as an organic whole, through using special annex to trigger the packer effect, there is the bloated problem of sealing in advance in some structure packers, and fail safe nature is poor.

It will thus be seen that the prior art is susceptible to further improvements and enhancements.

SUMMERY OF THE UTILITY MODEL

The utility model provides an integral differential pressure grading hoop with a packer, which solves at least one technical problem of the technical problems.

The technical scheme adopted by the utility model is as follows:

the utility model provides an integral differential pressure grading hoop with a packer, which comprises the packer, a body, a closing sleeve, an opening plug seat and a closing plug seat, wherein the closing sleeve, the opening plug seat and the closing plug seat are arranged in the body; the closing sleeve is sleeved in the body, and the opening plug seat and the closing plug seat are oppositely arranged at two ends of the inside of the closing sleeve; a body circulation hole is formed in the side wall of the body, and a closing sleeve circulation hole corresponding to the body circulation hole is formed in the side wall of the closing sleeve; opening the body circulation hole and the closing sleeve circulation hole by a relative movement between the opening plug seat and the closing sleeve; closing the body circulation hole and the closure sleeve circulation hole by relative movement between the closure sleeve and the body;

still including promoting the nipple joint, promote the nipple joint with the packer sets up relatively the both ends of body, it keeps away from to promote the nipple joint the one end of body still is provided with the connector, the connector is used for being connected with the sleeve pipe.

As a preferred embodiment of the utility model, the closing sleeve is fixed to the body by a stopper, and the closing seat plug is connected to the closing sleeve by a closing shear pin; the opening seat plug is fixedly connected with the closing sleeve through an opening shear pin, and the opening seat plug can move relative to the opening stop ring.

As a preferred embodiment of the present invention, a groove adapted to the stopper is formed on one side of the closing plug seat close to the closing sleeve, and the stopper can fall into the groove when the closing sleeve moves relative to the body.

As a preferred embodiment of the present invention, a position-limiting portion is disposed at an end of the opening plug seat away from the opening stop ring, and the position-limiting portion can cooperate with the opening stop ring to limit when the opening plug seat moves relative to the closing sleeve.

As a preferred embodiment of the present invention, a guide screw is further disposed on the sidewall of the body, and after the closing sleeve moves relative to the body, the guide screw can lock the closing sleeve.

As a preferred embodiment of the utility model, the packer comprises a central pipe, a rubber sleeve, a first connecting sleeve and a rubber sleeve protective sleeve; the rubber sleeve is sleeved on the outer side of the central pipe and forms a sealed cavity capable of being inflated by liquid with the outer wall surface of the central pipe, the first connecting sleeve is arranged at one end, away from the grading hoop, of the central pipe, one end of the rubber sleeve protective sleeve is connected with the rubber sleeve, and the other end of the rubber sleeve protective sleeve is connected with the first connecting sleeve.

As a preferred embodiment of the utility model, the packer further comprises a packer connector and a second connecting sleeve; the body the packer connector, the second connecting sleeve and the packing element connect gradually.

As a preferred embodiment of the present invention, the packer connector has a liquid injection channel, and the seal cavity is communicated with the inside of the stage collar through the liquid injection channel.

As a preferred embodiment of the present invention, a dustproof baffle ring is further disposed in the packer connector, and the dustproof baffle ring is disposed at a communication position between the liquid injection channel and the inside of the stage collar.

As a preferred embodiment of the present invention, the packer is further provided with a packer opening valve and a packer closing valve, which are respectively used for opening and closing the liquid injection channel.

Due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. as an preferred embodiment of this application, the setting up of promotion nipple joint has made things convenient for constructor to operations such as the centre gripping of this application medium grade hoop, transport, has also made things convenient for operations such as the installation of grade hoop is gone into the well simultaneously, and the convenience of the construction that greatly promotes is favorable to reducing intensity of labour, promotes production efficiency.

2. Compare in the mode that adopts conventional stage cementing ware and packer to establish ties and use among the prior art, the stage hoop in this application is monolithic design with the packer, and simple structure is reasonable, convenient operation and reliability are high.

3. As an optimal implementation mode of this application, packer still is provided with the packer in this application and opens valve and packer shutoff valve to the emergence of the expanded scheduling problem of avoiding expanding in advance is sealed in the time of the expanded timing of control packer that can be accurate.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural view of an integral differential pressure staged collar with a packer in the present application;

FIG. 2 is a schematic structural view of portion A of FIG. 1;

FIG. 3 is a schematic structural diagram of portion B of FIG. 1;

fig. 4 is a schematic structural view of a portion C in fig. 1.

Wherein the content of the first and second substances,

1, connecting a connector; 2, lifting the short section; 3, a body; 4, closing the plug seat; 5, closing the shear pin; 6, a stop block; 7, sealing rings; 8 closing sleeve, 81 guide groove; 9 guiding screws; 10 a body circulation hole; 11, closing the sleeve circulation hole; 12, a clamp spring; 13, opening the shear pin; 14 opening the plug seat and 141 spacing parts; 15, opening the baffle ring; 16 a packer coupling; 17, a dustproof baffle ring; 18 second connecting sleeves; 19 a central tube; 20, a rubber cylinder; 21, a rubber sleeve protective sleeve; 22 a first coupling sleeve; 23 liquid injection channels; 24 packer opening valves; 25 packer shut-off valve; 26 grooves; 27 are beveled.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it is to be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in FIGS. 1-4, the utility model provides an integral differential pressure grading hoop with a packer, which comprises the packer, a body 3, a closing sleeve 8, an opening plug seat 14 and a closing plug seat 4, wherein the closing sleeve 8, the opening plug seat 14 and the closing plug seat 4 are arranged in the body 3; the closing sleeve 8 is sleeved in the body 3, and the opening plug seat 14 and the closing plug seat 4 are oppositely arranged at two ends of the inside of the closing sleeve 8; a body circulation hole 10 is formed in the side wall of the body 3, and a closing sleeve circulation hole 11 corresponding to the body circulation hole 10 is formed in the side wall of the closing sleeve 8; opening the body circulation hole 10 and the closing sleeve circulation hole 11 by the relative movement between the opening plug seat 14 and the closing sleeve 8; closing the body circulation hole 10 and the closure sleeve circulation hole 11 by relative movement between the closure sleeve 8 and the body 3; continuing to refer to fig. 1 and showing, the integral differential pressure stage collar in area packer in this application still includes promotes nipple joint 2, promotes nipple joint 2 and the relative both ends that set up at body 3 of packer, promotes that the nipple joint 2 keeps away from the one end of body 3 and still is provided with connector 1, and connector 1 is used for being connected with the sleeve pipe.

Compare in the mode that adopts conventional stage cementing ware and packer to establish ties and use among the prior art, the stage hoop in this application is integral design with the packer, and simple structure is reasonable, convenient operation and reliability are high, and promote setting up of nipple joint 2 and made things convenient for constructor to operations such as the centre gripping of stage hoop in this application, transport, also made things convenient for operations such as the installation of stage hoop is gone into the well simultaneously, the convenience of the construction that greatly promotes is favorable to reducing intensity of labour, promotes production efficiency.

Further, as shown in fig. 1, the closing sleeve 8 is fixed to the body 3 by a stopper 6, and the closing plug is connected to the closing sleeve 8 by a closing shear pin 5; an opening baffle ring 15 is further arranged between the opening seat plug and the closing sleeve 8, the opening baffle ring 15 is fixedly connected with the closing sleeve 8, the opening seat plug is connected with the opening baffle ring 15 through an opening shear pin 13, and the opening seat plug can move relative to the opening baffle ring 15.

In a specific example, as shown in fig. 1, with continued reference, one end of the opening plug seat 14 is connected with the opening baffle ring 15 through the opening shear pin 13, and the other end is in sealing fit with the closing sleeve 8, so as to seal the body circulation hole 10 and the closing sleeve circulation hole 11, during actual construction, the packer is firstly pressed into the packer to expand the space in the well, the pressing is continued to make the opening plug seat 14 bear pressure and shear the opening shear pin 13, so that the opening plug seat 14 moves relative to the opening baffle ring 15 and moves relative to the closing sleeve 8 under the action of pressure, so as to open the body circulation hole 10 and the closing sleeve circulation hole 11, and the grading hoop can pour grout into the well through the body circulation hole 10 and the closing sleeve circulation hole 11 to perform cementing operation.

Further, referring to fig. 2, a groove 26 corresponding to the stopper 6 is formed on one side of the closing plug seat 4 close to the closing sleeve 8, and the stopper 6 can fall into the groove 26 when the closing sleeve 8 moves relative to the body 3. In the actual construction process, after the well cementation operation is carried out for a period of time, the pressure is continuously pressed into the grading hoops, the closing plug seat 4 bears the pressure and cuts off the closing shear nails 5, the closing plug seat 4 moves relative to the closing sleeve 8 under the action of the pressure, the stop dog 6 falls into the groove 26, the closing sleeve 8 is not restrained by the body 3 and can move relative to the body 3, the body circulation hole 10 and the closing sleeve circulation hole 11 are staggered and mutually closed, and the well cementation operation is finished.

In a specific example, as shown in fig. 3, a snap spring 12 is disposed on a side wall of the closing sleeve 8, and when the closing sleeve 8 is not constrained by the body 3, the closing sleeve 8 moves relative to the body 3 under the action of the snap spring 12 and pressure, so that the body circulation hole 10 and the closing sleeve circulation hole 11 are staggered and mutually closed, and the cementing operation is ended.

In a preferred example, as shown in fig. 2, the sidewall of the body 3 is also provided with a groove, the sidewall of the closing sleeve 8 is provided with a through hole, and the positions of the groove and the through hole correspond to each other when the closing sleeve 8 is not moved, so that the stopper 6 can be arranged in the groove of the sidewall of the body 3 through the through hole to limit and match the body 3 and the closing sleeve 8; with continued reference to fig. 2, the upper edge of the stop 6 has a bevel 27, and the edges of the groove on the side wall of the body 3 and the groove 26 on the closure seat 4 are also beveled, so that the stop 6 can fall more smoothly under pressure from the groove on the side wall of the body 3 into the groove 26 on the closure seat 4, thereby releasing the closure sleeve 8.

It should be noted that the structure of the groove 26 and the structure of the stopper 6 are only one preferred embodiment in the embodiment of the present application, and may also adopt more different structural forms, which is not specifically limited in the present application.

Further, as shown in fig. 1, a guide screw 9 is further disposed on the sidewall of the body 3, and after the closing sleeve 8 moves relative to the body 3, the guide screw 9 can lock the closing sleeve 8. In a specific example, with continued reference to fig. 1, a guide groove 81 is formed in a side wall of the closing sleeve 8 close to the body 3, one end of the guide screw 9 is engaged with the guide groove 81, the guide screw 9 can also slide in the guide groove 81 when the closing sleeve 8 moves relative to the body 3, and after the cementing operation is completed, the guide screw 9 is locked in the guide groove 81, so that the closing sleeve 8 is locked and limited in the circumferential direction, and the subsequent operations such as drilling and plugging are prevented from causing the closing sleeve 8 to rotate while drilling.

It should be noted that the above-mentioned method of providing the guide screw 9 to lock and limit the closing sleeve 8 in the circumferential direction is only one preferred embodiment of the present application, and the locking and limiting of the closing sleeve 8 in the circumferential direction may be achieved by providing a structure such as a hook and a groove on the inner side walls of the closing sleeve 8 and the body 3, and the present application is not particularly limited.

Further, as shown in fig. 1, the packer comprises a base pipe 19, a rubber sleeve 20, a first connecting sleeve 22 and a rubber sleeve protective sleeve 21; the rubber sleeve 20 is sleeved on the outer side of the central tube 19 and forms a sealed cavity (not shown in the figure) which can be filled with liquid expansion with the outer wall surface of the central tube 19, the first connecting sleeve 22 is arranged at one end of the central tube 19 far away from the grading hoop, one end of the rubber sleeve protecting sleeve 21 is connected with the rubber sleeve 20, and the other end of the rubber sleeve protecting sleeve is connected with the first connecting sleeve 22.

With continued reference to FIG. 1, the packer further includes a packer connector 16 and a second connection sleeve 18; the body 3, the packer connector 16, the second connecting sleeve 18 and the rubber sleeve 20 are connected in sequence.

It should be noted that, in this application, between connector 1 and lift nipple 2, between lift nipple 2 and body 3, between body 3 and packer connector 16, between packer connector 16 and second adapter sleeve 18, between second adapter sleeve 18 and packing element 20, all adopt threaded connection's mode to connect and all be provided with seal groove (not shown in the figure) and sealing washer 7 between packing element 20 and packing element protective sheath 21 and first adapter sleeve 22 and carry out further connection and sealing.

Further, as shown in fig. 1, seal grooves and seals 7 are also provided between the body 3 and the closure sleeve 8, between the closure sleeve 8 and the opening cord and closure seat 4, between the opening seat 14 and the opening stop ring 15, and between the first connecting sleeve and the central tube 19 for further connection and sealing.

It should be noted that the threaded connection is only one preferred embodiment of the embodiments of the present application, and the connection method between the above-mentioned components is not particularly limited in the present application, and other connection methods and structures such as welding may be used. The arrangement of the sealing groove and the sealing ring 7 is also only an optimal implementation mode of the sealing device, the arrangement of the sealing groove and the sealing ring 7 is beneficial to ensuring the sealing performance of the whole structure, so that the normal operation of the construction processes such as well cementation is ensured, the problem that the sealing is not tight and the construction efficiency is influenced is avoided, the sealing device is simple in structure and high in practicability compared with other sealing structures, other sealing modes and structures can be adopted for sealing, and the sealing device is not limited to the sealing device.

Further, referring to FIG. 1, packer coupling 16 has a fill passage 23, and the seal cavity communicates with the interior of the staged collar through the fill passage 23. In one particular embodiment, and with continued reference to FIG. 1, a dust retainer 17 is also disposed within the packer coupling 16, and the dust retainer 17 is disposed in the fluid injection passage 23 in communication with the interior of the staged collar. The arrangement of the liquid injection channel 23 facilitates the staged hoops to inject liquid into the sealed cavity so as to expand the rubber sleeve 20, so that the packer can seal the space in the well and facilitate the well cementation operation; the dirt proof ring then can play the filtering action to prevent that the large granule solid phase in the drilling fluid from getting into packing element 20, avoid the large granule solid phase in the drilling fluid deposit in packing element 20 and influence the normal work of packer, and compare in directly setting up modes such as filter screen, the structural strength of dirt proof retaining ring 17 is higher, and the setting in the connector 1 of separating is convenient and fast more.

Of course, a structure such as a filter screen may be directly provided for filtering, and the provision of the dustproof baffle ring 17 is only one preferred embodiment of the present application, and the present application is not particularly limited by this comparison.

Further, as shown in fig. 4, the packer is also provided with a packer opening valve 24 and a packer closing valve 25, and the packer opening valve 24 and the packer closing valve 25 are used for opening the liquid injection channel 23 and closing the liquid injection channel 23, respectively. The packer opening valve 24 and the packer closing valve 25 enable the construction personnel to accurately control the time for expanding and sealing the packer, avoid the occurrence of the problems of expanding and sealing in advance and the like, are favorable for improving the accuracy of operation, and improve the construction efficiency and the construction effect.

The method can be realized by adopting or referring to the prior art in places which are not described in the utility model.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. The integral differential pressure grading hoop with the packer is characterized by comprising the packer, a body, a closing sleeve, an opening plug seat and a closing plug seat, wherein the closing sleeve, the opening plug seat and the closing plug seat are arranged in the body; the closing sleeve is sleeved in the body, and the opening plug seat and the closing plug seat are oppositely arranged at two ends of the inside of the closing sleeve; a body circulation hole is formed in the side wall of the body, and a closing sleeve circulation hole corresponding to the body circulation hole is formed in the side wall of the closing sleeve; opening the body circulation hole and the closing sleeve circulation hole by a relative movement between the opening plug seat and the closing sleeve; closing the body circulation hole and the closure sleeve circulation hole by relative movement between the closure sleeve and the body;

still including promoting the nipple joint, promote the nipple joint with the packer sets up relatively the both ends of body, it keeps away from to promote the nipple joint the one end of body still is provided with the connector, the connector is used for being connected with the sleeve pipe.

2. The integral differential pressure differential stage collar with packer of claim 1, characterized in that the closing sleeve is fixed with the body by a stopper, the closing seat plug is connected with the closing sleeve by a closing shear pin; the opening seat plug is fixedly connected with the closing sleeve through an opening shear pin, and the opening seat plug can move relative to the opening stop ring.

3. The integral differential pressure differential stage collar with packer of claim 2, wherein the closing plug seat is provided with a groove corresponding to the stopper on one side close to the closing sleeve, and the stopper can fall into the groove when the closing sleeve moves relative to the body.

4. The integral differential pressure differential stage collar with packer of claim 3, wherein the end of the opening plug seat away from the opening stop ring is provided with a limiting portion capable of cooperating with the opening stop ring for limiting when the opening plug seat moves relative to the closure sleeve.

5. The integral differential pressure differential stage collar with packer of claim 3, wherein a guide screw is further provided on the sidewall of the body, the guide screw being capable of locking the closure sleeve after the closure sleeve is moved relative to the body.

6. The integral differential pressure grading ferrule with packer of claim 5, wherein the packer comprises a base pipe, a packing element, a first coupling sleeve and a packing element protective sleeve; the rubber sleeve is sleeved on the outer side of the central pipe and forms a sealed cavity capable of being inflated by liquid with the outer wall surface of the central pipe, the first connecting sleeve is arranged at one end, away from the grading hoop, of the central pipe, one end of the rubber sleeve protective sleeve is connected with the rubber sleeve, and the other end of the rubber sleeve protective sleeve is connected with the first connecting sleeve.

7. The packer-equipped integral differential pressure staged collar of claim 6, further comprising a packer connector and a second connection sleeve; the body the packer connector, the second connecting sleeve and the packing element connect gradually.

8. The integral differential pressure differential stage collar with a packer as recited in claim 7, wherein the packer connector has a fluid injection passage through which the seal cavity communicates with the interior of the stage collar.

9. The integral differential pressure differential stage collar with a packer as claimed in claim 8, wherein a dustproof baffle ring is further arranged in the packer connector, and the dustproof baffle ring is arranged at the communication position of the liquid injection channel and the interior of the stage collar.

10. The packer-equipped integral differential pressure grading collar according to claim 9, wherein the packer is further provided with a packer-opening valve and a packer-closing valve for opening the liquid-charging passage and closing the liquid-charging passage, respectively.

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