CN217129491U

CN217129491U - Sand prevention packer

Info

Publication number: CN217129491U
Application number: CN202221115650.7U
Authority: CN
Inventors: 李强; 周欢; 徐凤祥; 董严冰; 倪涛; 梁月松; 张伦; 蔡东兴; 张文博; 徐海珍
Original assignee: China Oilfield Services Ltd
Current assignee: China Oilfield Services Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-08-05
Anticipated expiration: 2032-04-29

Abstract

The utility model belongs to the technical field of oil recovery instrument in the pit, a can improve the pressure-bearing rank, can realize the sand control packer of big discharge capacity production again is disclosed. Including sand control packer body and the biography of the inside that is located sand control packer body turn round the mechanism, the former is including the setting mechanism of coaxial setting in proper order, anchoring mechanism, locking sleeve and deblocking mechanism, the biography is turned round the mechanism and is included biography and turn round the piece and simultaneously with the setting mechanism, the dabber that anchoring mechanism and deblocking mechanism link to each other, the dabber is provided with the constant head tank with the relative region of locking sleeve, set up the direction logical groove with the constant head tank intercommunication in the telescopic axial of locking, sand control packer constructs for having the biography at least and turns round the mode: the mandrel enables the torque transmission block to drive the stop sleeve to rotate under the action of external torque so as to drive the sand prevention packer body to integrally rotate; and (3) a deblocking mode: the deblocking mechanism removes the connection of dabber and deblocking mechanism, and the dabber drives the biography piece under the exogenic action and slides along the direction logical groove so that anchoring mechanism and setting mechanism inefficacy and accomplish the deblocking.

Description

Sand prevention packer

Technical Field

The utility model relates to an oil recovery instrument technical field in the pit, concretely relates to sand control packer.

Background

Offshore gas fields have abundant resources, but because the oil and gas reservoirs are buried deeply, the temperature is higher than 150 ℃, the pressure gradient is large, and the pressure grade is higher than 10000psi, the exploitation conditions are harsh, and the construction difficulty is large. Especially in the aspect of bottom packer, to present sand control packer, have the pressure-bearing rank low (the wall thickness is thinner, the bearing capacity is not enough), interior latus rectum is little (conventional packer only reduces interior latus rectum and just can satisfy the bearing strength requirement, but just can't realize big discharge capacity production) scheduling problem.

How to improve the pressure-bearing grade of the sand control packer and not influence the large-discharge production becomes a problem which needs to be solved urgently by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

The weak point to prior art, the utility model provides a can improve the pressure-bearing rank, do not influence the sand control packer of large discharge capacity production again.

According to the utility model discloses a sand control packer, include: the sand control packer comprises a sand control packer body and a torque transmission mechanism positioned in an axial central channel inside the sand control packer body, wherein the sand control packer body comprises a setting mechanism, an anchoring mechanism, a locking sleeve and a deblocking mechanism which are coaxially arranged in sequence, the torque transmission mechanism comprises a torque transmission block and a mandrel positioned in the axial central channel, the mandrel is simultaneously connected with the setting mechanism, the anchoring mechanism and the deblocking mechanism, a positioning groove for placing the torque transmission block is formed on the outer surface of a region of the mandrel opposite to the locking sleeve, a guide through groove for guiding the torque transmission block is formed in the axial direction of the locking sleeve, the guide through groove is communicated with the positioning groove, the sand control packer is constructed to have a torque transmission mode, a setting mode and a deblocking mode, in the torque transmission mode, the mandrel transmits torque to the torque transmission block under the action of external torque so that the torque transmission block drives the stop sleeve to rotate, and the sand prevention packer body is driven to integrally rotate; in a setting mode, the anchoring mechanism is anchored with the well wall, and the setting mechanism sets an annular gap between the sand control packer body and the well wall; under the deblocking mode, the deblocking mechanism removes being connected of dabber and deblocking mechanism, and the dabber drives the biography and turns round the piece and upwards slide along the direction logical groove under the pull-up of external force to make anchoring mechanism and setting mechanism inefficacy, thereby accomplish the deblocking.

Furthermore, a circular truncated cone is formed on the outer surface of one end, close to the unsealing mechanism, of the mandrel, and a positioning groove is formed in the circular truncated cone.

Further, the thickness between the groove bottom of the positioning groove and the inner wall of the mandrel is larger than or equal to the wall thickness of other areas of the mandrel.

Furthermore, the biography is turned round the piece and is included the spacing portion that is located the constant head tank and the guide part that links to each other with spacing portion, guide part and the logical groove sliding fit that leads to of direction, the shape of spacing portion and the shape phase-match in the constant head tank, the width of constant head tank is greater than the logical width that leads to of direction.

Further, sit and seal the mechanism and include that coaxial consecutive seat seals sleeve, packing element upper bracket, combination packing element and packing element lower bracket in proper order, the dabber links to each other with the packing element upper bracket through first locking mechanical system, first locking mechanical system is formed with the locking tooth that is used for locking the locking tooth including the locking ring part of fixing on the periphery wall of dabber and the locking tooth that forms on the inner wall of packing element upper bracket on the periphery wall of locking ring part.

Furthermore, the sand control packer also comprises an upper short section which is connected with the head end of the mandrel and used for being matched with an external torque tool, and the upper short section is connected with the setting sleeve barrel through a first shearing pin.

Further, the anchoring mechanism comprises the following components which are coaxially connected in sequence: the upper cone body, the slips and the lower cone body are connected with the lower seat of the rubber cylinder, and the lower cone body is connected with the stop sleeve.

Further, the unsealing mechanism includes: the locking device comprises a switch sleeve outer barrel connected with a locking sleeve, a switch sleeve positioned in the switch sleeve outer barrel and connected with the switch sleeve outer barrel, and a second locking mechanism, wherein the mandrel is connected with the switch sleeve through the second locking mechanism, and the second locking mechanism is structured as follows: the mandrel and the switch sleeve are locked in the setting mode and the torque transmission mode, and unlocked in the unsealing state, so that the mandrel can be lifted up.

Further, a first sealing element is arranged between the tail of the mandrel and the switch sleeve.

Furthermore, the sand control packer further comprises a lower short section connected with the outer cylinder of the switch sleeve, and a second sealing element is arranged between the lower short section and the switch sleeve.

Compared with the prior art, the utility model discloses a sand control packer passes through the design and passes the torsion device, has improved sand control packer's resistance to compression rank greatly, can satisfy the super high pressure environment operation, does not influence its former latus rectum (6in) size simultaneously, for the later stage annotates to adopt, the well workover provides great operation passageway. The utility model discloses but not only wide application in ultra-high temperature high pressure sand control type packing operation still is applicable to and needs other well completion operation relevant fields.

Drawings

FIG. 1 is a cross-sectional view of a structure of a sand control packer according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line C-C of FIG. 1;

FIG. 3 is a schematic structural view of the guiding channel shown in FIG. 2;

FIG. 4 is an enlarged view of FIG. 1 at A;

fig. 5 is an enlarged view of fig. 1 at B.

Detailed Description

For better understanding of the purpose, structure and function of the present invention, the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 shows the structure of a sand control packer 100 according to an embodiment of the present invention. It includes: the sand control packer comprises a sand control packer body and a torque transmission mechanism located in an axial central channel 101 inside the sand control packer body, wherein the sand control packer body comprises a setting mechanism (comprising a setting sleeve 11, a rubber sleeve upper seat 12, a combined rubber sleeve 13 and a rubber sleeve lower seat 14 which are sequentially and coaxially connected), an anchoring mechanism (comprising an upper cone 21, a slip 22 and a lower cone 23 which are sequentially and coaxially connected and are connected with the rubber sleeve lower seat 14), a stopping sleeve 3 (connected with the lower cone 23) and a deblocking mechanism (comprising a switch sleeve 41 connected with the stopping sleeve 3, a switch sleeve 42 connected with the switch sleeve outer cylinder 41 and located in the switch sleeve outer cylinder 41 and a second locking mechanism 83), the torque transmission mechanism comprises a torque transmission block 73 and a mandrel 71 located in the axial central channel 101, the mandrel 71 is simultaneously connected with the setting mechanism, the anchoring mechanism and the deblocking mechanism, the outer surface of a region, opposite to the stopping sleeve 3, of the mandrel 71 is provided with a positioning groove for placing the torque transmission block 73 711, a guide through groove 31 for guiding the torque transmission block 73 is formed in the axial direction of the stopping sleeve 3, the guide through groove 31 is communicated with the positioning groove 711, the sand control packer 100 is structured to have a torque transmission mode, a setting mode and a deblocking mode, and in the torque transmission mode, the mandrel 71 transmits torque to the torque transmission block 73 under the action of external torque so that the torque transmission block 73 drives the stopping sleeve 3 to rotate, thereby driving the sand control packer body to integrally rotate; in a setting mode, the anchoring mechanism is anchored with the well wall, and the setting mechanism sets an annular gap between the sand control packer body and the well wall; in the unsealing mode, the unsealing mechanism releases the connection between the mandrel 71 and the unsealing mechanism, the mandrel 71 drives the torque transmission block 73 to slide upwards along the guide through groove 31 under the pull-up of external force, so that the anchoring mechanism and the setting mechanism are disabled, and the unsealing is completed.

The utility model discloses on the basis of keeping the interior latus rectum of former sand control packer body, through setting up the biography and turn round mechanism, make the sand control packer 100 of the embodiment of the utility model have higher bearing capacity, simultaneously, when going into the pit and being obstructed under sand control packer 100, dabber 71 in the biography and turn round mechanism can drive locking sleeve 3 to rotate through passing and turning round piece 73 under the effect of external torque force, thereby drive sand control packer body and rotate as a whole, make sand control packer 100 more smooth and easy when going into, help improving work efficiency; when the sand control packer 100 needs to be unset after the work is finished, the unset mechanism releases the connection between the mandrel 71 and the unset mechanism, the mandrel 71 can be pulled up and down by external force to drive the torque transmission block 73 to slide upwards along the guide through groove 31, so that the anchoring mechanism and the setting mechanism are out of work, and the unset is finished.

The utility model discloses sand control packer 100 has set concurrently and seals, the transmission of moment of torsion and the triple function of deblocking, and the setting of the mechanism is turned round in the transmission has not only improved sand control packer 100's pressure-bearing rank, still can improve sand control packer 100's work efficiency.

Preferably, a plurality of positioning grooves 711 are formed at intervals in the circumferential direction on the outer surface of the region of the core shaft 71 opposite to the stopper sleeve 3, a torque transmission block 73 is placed in each positioning groove 711, and a plurality of guide through grooves 31 for guiding the torque transmission block 73 are formed on the stopper sleeve 3, so as to further improve the stability of the operation of the torque transmission device.

As shown in fig. 1 and 2, a circular truncated cone 712 is formed on an outer surface of the spindle 71 near one end of the unsealing mechanism, and a positioning groove 711 is formed on the circular truncated cone 712. This setting can avoid directly seting up on the surface of dabber 71 and influence its holistic structural strength because of constant head tank 711, and simultaneously, the setting of this round platform 712 also can improve the intensity of biography torsion piece 73 when key-type connection dabber 71 and locking sleeve 3 to ensure that dabber 71 can transmit the moment of torsion to locking sleeve 3 more steadily, thereby drive sand control packer body and rotate steadily.

Further, the thickness between the bottom of the positioning groove 711 and the inner wall of the core shaft 71 may be greater than or equal to the wall thickness of other areas of the core shaft 71, so that the area of the core shaft 71 where the positioning groove 711 is located still has a larger wall thickness, or has the same wall thickness as the other areas, to ensure that the area of the core shaft 71 can bear the same or similar torque force as the other areas. Preferably, the thickness between the groove bottom of the positioning groove 711 and the inner wall of the spindle 71 is equal to the wall thickness of the other areas of the spindle 71, which is preferably greater than 10 mm.

According to the present invention, as shown in fig. 1 and 2, the torque transmission block 73 may include a limiting portion 731 located in the positioning groove 711 and a guiding portion 732 connected to the limiting portion 731, the guiding portion 732 is slidably engaged with the guiding groove 31, the shape of the limiting portion 731 is matched with the shape of the positioning groove 711, and the width of the positioning groove 711 is greater than the width of the guiding groove 31. With this arrangement, the stopper portion 731 can be retained in the positioning groove 711 without coming out of the positioning groove 711, and the guide portion 732 can smoothly slide along the guide through-groove 31.

In this embodiment, the torque transmission block 73 may be embodied as an inverted T shape as shown in fig. 2, a surface of the limiting portion 731 connected to the guide portion 732 may be configured as an arc shape fitting the shape of the inner wall of the locking sleeve 3, the groove depth of the positioning groove 711 may be greater than 6mm, and the thickness of the limiting portion 731 is equal to the groove depth of the positioning groove 711; the guide 732 may have a thickness greater than 8 mm.

It is further preferable that the top of the guide portion 732 is located in the guide through groove 31 to prevent the guide portion 732 from protruding outside the stopping sleeve 3.

According to the utility model discloses, as shown in fig. 3, the guide through groove 31 can include the guide way 311 of seting up in the axial of along locking sleeve 3 and the assembly groove 312 that communicates with guide way 311, when the assembly biography is turned round piece 73, can make assembly groove 312 relative with constant head tank 711, can pack into biography and turn round piece 73 this moment, spacing portion 731 is located constant head tank 711, guide part 732 is located assembly groove 312, then make locking sleeve 3 slide for dabber 71 again, guide part 732 of biography is turned round piece 73 gets into in the guide way 311 and slides to the terminal point of guide way 311 along guide way 311 from assembly groove 312 this moment, thereby accomplish the assembly of biography and turn round piece 73.

According to the present invention, as shown in fig. 1 and 4, the mandrel 71 can be connected to the upper rubber cylinder base 12 through a first locking mechanism, the first locking mechanism includes a locking ring member 15 fixed to the outer peripheral wall of the mandrel 71 and locking teeth 121 formed on the inner wall of the upper rubber cylinder base 12, and locking grooves for locking the locking teeth 121 are formed on the outer peripheral wall of the locking ring member 15. In the setting mode, the rubber barrel upper seat 12 is pushed by external force, and the locking teeth 12 slide forwards and lock relative to the locking groove.

Further, the utility model discloses sand control packer 100 still can include the nipple joint 72 on being used for and the complex of outside torque tool that links to each other with the head end of dabber 71, go up nipple joint 72 and set sleeve 11 and link to each other through first shear pin 91. The upper sub 72 is used to transmit torque to the spindle 71.

According to the present invention, as shown in fig. 1 and 5, the unsealing mechanism may include: a switch housing outer cylinder 41 connected to the stopper sleeve 3, a switch housing 42 connected to the switch housing outer cylinder 41 and located inside the switch housing outer cylinder 41, and a second locking mechanism 83, by which the spindle 71 is connected to the switch housing 42, the second locking mechanism 83 being configured to: the spindle 71 is locked with the switch sleeve 42 in the setting mode and the torque transmission mode, and the spindle 71 is unlocked with the switch sleeve 42 in the unsealing state, so that the spindle 71 can be lifted up.

Specifically, as shown in fig. 5, second locking mechanism 83 may be a C-shaped bearing ring that is threadedly connected to mandrel 71, and when pull 42 is slid upward relative to 41, the C-shaped bearing ring loses pressure on mandrel 71 so that mandrel 71 may be lifted up.

Further, a first sealing member 81 is disposed between the tail portion of the stem 71 and the switch cover 42. Preferably, a sealing groove for installing the sealing member 81 may be provided on an inner wall of the switch sleeve 42, and the first sealing member 81 may include a sealing ring and a sealing ring retainer ring provided outside the sealing ring.

Further, as shown in fig. 1, the sand control packer 100 may further comprise a lower sub 6 connected (preferably threadedly connected) to the switching sleeve outer cylinder 41, with a second seal 82 disposed between the lower sub 6 and the switching sleeve 42. The second sealing member 82 may be identical in structure and arrangement to the first sealing member 81 described above, and will not be described herein.

The following specifically describes the working process of the sand control packer 100 according to the embodiment of the present invention with reference to fig. 1:

when the utility model discloses sand control packer 100 goes into the well, takes out transportation pin 92, after reacing the predetermined position, suppress through the setting instrument, pressure acts on 5 inboard bosss 51 of guide joint, promote setting sleeve 11, packing element seat of honour 12, combination packing element 13, packing element seat of honour 14 in proper order, go up centrum 21 downstream, slips 22 is released and firmly blocks on the wall of a well, afterwards, packing element seat of honour 12 compression combination packing element 13 to the annular space between the wall of a well and the packer body is sealed off to combination packing element 13, each spare part is locked with the locking groove meshing of installing locking ring part 15 on dabber 71 to the locking tooth 121 of packing element seat of honour 12, accomplishes the setting process.

In the normal running process of the sand control packer 100, if the sand control packer 100 needs to be rotated when meeting a blockage or a special condition, an external torque tool can be adopted to be matched with the upper joint 72, the torque is transmitted to the mandrel 71 through the threaded connection between the upper joint 72 and the mandrel 71, and the mandrel 71 is transmitted to the stopping sleeve 3 through the torque transmission block 73, so that the sand control packer 100 is driven to rotate integrally.

During deblocking, a tool is adopted to pull the boss 421 of the switch sleeve 42, so that the switch sleeve 42 slides upwards relative to the switch sleeve outer cylinder 41, and the second locking mechanism 83 loses the fixing capacity on the core shaft 71, so that the core shaft 71 can be lifted upwards, the core shaft 71 drives the torque transmission block 73 to slide in the guide through groove 31 in the locking sleeve 3, the lower cone 23 loses the supporting force on the slip 22, the slip 22 is radially retracted, meanwhile, the rubber cylinder lower seat 14 loses the supporting force on the combined rubber cylinder 13, the combined rubber cylinder 13 axially recovers the initial length, and the setting effect is lost, so that the sand control packer 100 is completely deblocked.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it is to be understood that the terms "length", "width", "thickness", 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 in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A sand control packer, comprising: the sand control packer comprises a sand control packer body and a torque transmission mechanism located in an axial central channel inside the sand control packer body, wherein the sand control packer body comprises a setting mechanism, an anchoring mechanism, a locking sleeve and a deblocking mechanism which are coaxially arranged in sequence, the torque transmission mechanism comprises a torque transmission block and a mandrel located in the axial central channel, the mandrel is simultaneously connected with the setting mechanism, the anchoring mechanism and the deblocking mechanism, a positioning groove for placing the torque transmission block is formed in the outer surface of a region, opposite to the locking sleeve, of the mandrel, a guide through groove for guiding the torque transmission block is formed in the axial direction of the locking sleeve, the guide through groove is communicated with the positioning groove, the sand control packer is constructed to have a torque transmission mode, a setting mode and a deblocking mode, and the mandrel transmits torque to the torque transmission block under the action of external torque in the torque transmission mode, so that the torque transmission block drives the stop sleeve to rotate, and the sand prevention packer body is driven to integrally rotate; in the setting mode, the anchoring mechanism is anchored with the well wall, and the setting mechanism sets an annular gap between the sand control packer body and the well wall; in the deblocking mode, deblocking mechanism removes the dabber with deblocking mechanism's connection, the dabber drives under the pull-up of external force the biography is turned round the piece and is followed the logical groove of direction upwards slides, so that anchoring mechanism with it is invalid to set mechanism, thereby accomplishes the deblocking.

2. The sand control packer as recited in claim 1 wherein the mandrel has a circular truncated cone formed on an outer surface of an end thereof adjacent the unsetting mechanism, the locating groove being formed in the circular truncated cone.

3. The sand control packer as recited in claim 2 wherein the thickness between the groove bottom of the locating groove and the inner wall of the mandrel is greater than or equal to the wall thickness of other areas of the mandrel.

4. The sand control packer as claimed in any one of claims 1 to 3, wherein the torque transmission block comprises a limiting part positioned in the positioning groove and a guiding part connected with the limiting part, the guiding part is in sliding fit with the guiding through groove, the shape of the limiting part is matched with that in the positioning groove, and the width of the positioning groove is larger than that of the guiding through groove.

5. The sand control packer as claimed in any one of claims 1 to 3, wherein the setting mechanism comprises a setting sleeve, a rubber upper seat, a combined rubber cylinder and a rubber lower seat which are coaxially connected in sequence, the mandrel is connected with the rubber upper seat through a first locking mechanism, the first locking mechanism comprises a locking ring component fixed on the outer circumferential wall of the mandrel and locking teeth formed on the inner wall of the rubber upper seat, and locking grooves for locking the locking teeth are formed on the outer circumferential wall of the locking ring component.

6. The sand control packer of claim 5, further comprising an upper sub coupled to the head end of the mandrel for engagement with an external torque tool, the upper sub coupled to the setting sleeve by a first shear pin.

7. The sand control packer of claim 5, wherein the anchoring mechanism comprises, in sequential coaxial communication: coaxially connected in turn: the upper cone body, the slips and the lower cone body are connected with the rubber cylinder lower seat, and the lower cone body is connected with the stop sleeve.

8. The sand control packer of claim 7, wherein the unsetting mechanism comprises: the locking mechanism comprises a switch sleeve outer cylinder connected with the locking sleeve, a switch sleeve positioned in the switch sleeve outer cylinder and connected with the switch sleeve outer cylinder, and a second locking mechanism, wherein the mandrel is connected with the switch sleeve through the second locking mechanism, and the second locking mechanism is structured as follows: the mandrel and the switch sleeve are locked in the setting mode and the torque transmission mode, and unlocked in the unlocking state, so that the mandrel can be lifted up.

9. The sand control packer of claim 8, wherein a first seal is disposed between the tail portion of the mandrel and the switch housing.

10. The sand control packer as recited in claim 9 further comprising a lower sub coupled to the outer barrel of the switching sleeve, a second seal being disposed between the lower sub and the switching sleeve.