CN209855745U - Rubber sleeve supporting device of large-diameter-expansion open hole packer - Google Patents
Rubber sleeve supporting device of large-diameter-expansion open hole packer Download PDFInfo
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- CN209855745U CN209855745U CN201920452003.7U CN201920452003U CN209855745U CN 209855745 U CN209855745 U CN 209855745U CN 201920452003 U CN201920452003 U CN 201920452003U CN 209855745 U CN209855745 U CN 209855745U
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Abstract
The rubber sleeve supporting device of the large-diameter-expansion open hole packer is characterized in that a lock shaft is connected with the rear end of a cone in a one-way motion mode, and the front end of the cone is provided with a first inclined surface; the rear end of the supporting block is provided with a second inclined plane, and the front end of the supporting block is a supporting surface for propping the shoulder of the rubber cylinder; the cone is pressed to move towards the direction of the rubber cylinder along the shaft, so that the supporting block performs radial expansion movement until the supporting block is attached to the inner wall of the open hole stratum; at the same time, the support surface is pressed against the shoulder of the rubber cylinder and prevents the rubber cylinder from deforming. The packer rubber cylinder can be effectively protected, shoulder projection damage of the rubber cylinder of the large-diameter-expansion open hole packer caused by overlarge load under the action of one-way pressure difference can be effectively prevented, and the use requirement of the packer in the large-diameter-expansion open hole can be met.
Description
Technical Field
The utility model relates to an oil gas field development is instrument in the pit, specifically speaking are rubber sleeve strutting arrangement of big hole enlargement bore hole packer.
Background
In the process of underground operation of oil-gas field development, the packer seals annular spaces between pipe columns with various sizes and well bores and between the pipe columns, and the purposes of isolating a production zone and protecting a casing are achieved. The packer mainly comprises a mandrel, a piston, an upper cone, a lower cone, a slip, a rubber cylinder and the like, wherein the rubber cylinder is a more critical element which directly influences the sealing performance of the packer; the rubber tube is usually made of rubber and belongs to super-elastic materials.
In a large-diameter-expanding open hole, under the action of one-way pressure difference of the packer, shoulder-protruding molding deformation (namely the shoulder of the rubber cylinder protrudes into an annular space) is easily generated on the shoulders of the rubber cylinder at the two ends of the rubber cylinder along the annular space between the packer and a sleeve, so that the rubber cylinder is easily damaged, the packer fails to work normally, and the later fracturing construction is influenced. Further, the clearance between the packer rubber sleeve and the well wall of the large-diameter-expanding open hole well is larger, and the axial load generated under the same pressure difference is larger, namely the common rubber sleeve shoulder protector cannot bear the large axial load. Therefore, the packer rubber sleeve protection device capable of meeting the requirements of the large-diameter-expansion open hole well needs to be researched, the end part of the packer rubber sleeve is prevented from being torn and damaged, and the normal use of the packer under the condition of a complex stratum is ensured.
The above problem, known as "shoulder" has been a hot spot of research in the industry.
The patent CN201310210362.9 relates to a packer rubber sleeve protection device, wherein, at least six axial slots are respectively arranged on an inner protective bowl and an outer protective bowl, and one surface of the outer protective bowl is superposed with the inner protective bowl; the other surface of the outer protective bowl is tightly attached to the cone, the outer wall of the cone is provided with an outer conical surface, and the outer conical surface of the cone is matched with an inner conical surface arranged on the inner wall of one side of the sliding block; the other side of the sliding block is circumferentially provided with guide heads, the sliding groove seat is provided with grooves with corresponding quantity, and the guide heads are correspondingly arranged in the grooves, so that the shoulder protrusion phenomenon of a rubber sleeve of the packer can be effectively prevented, the bearing capacity of the rubber sleeve is improved, and the use requirement of the packer under a high-pressure environment is met.
The patent CN 201720230303.1 discloses a strong-sealing anti-shoulder compression packer, wherein a rubber cylinder is arranged on the outer side of a central tube, a rotary anti-protrusion device is arranged on the rubber cylinder, and a hydraulic assembly is used for applying pressure to the rubber cylinder, deforming and protruding the rubber cylinder and then contacting an oil sleeve; the rotary outburst prevention device comprises a fixed section, a rotary section and a connecting coil spring, wherein the fixed section is fixedly connected to the rubber cylinder, and the rotary section is movably connected with the fixed section through the connecting coil spring; the rotary section is attached to the end face of the rubber cylinder, so that the technical problems of pressure resistance and shoulder protrusion can be effectively solved, the sealing performance of the rotary section is greatly improved, and the reliability of the tool in underground work is ensured.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve current problem, aim at providing a packing element strutting arrangement of big hole enlargement bore hole packer.
In order to achieve the purpose, the technical scheme adopted by the utility model is arranged at the end part of the rubber cylinder, and comprises a lock shaft fixed on a central tube, a cone and a plurality of supporting blocks; be annular space between packing element and the bore hole stratum, wherein: the lock shaft is connected with the rear end of the cone in a one-way motion mode, and the front end of the cone is provided with a first inclined surface; the rear end of the supporting block is provided with a second inclined plane corresponding to the first inclined plane, and the front end of the supporting block is a supporting surface for propping the shoulder of the rubber cylinder; the cone is pressed to move towards the direction of the rubber cylinder along the shaft, the first inclined surface pushes the second inclined surface, and then the supporting block is radially expanded (namely, the supporting block is uniformly diffused outwards along the radial direction, namely, the supporting block is also called to be subjected to expanding movement) until the supporting block is attached to the inner wall of the barefoot stratum; at the same time, the support surface is pressed against the shoulder of the rubber cylinder and prevents the rubber cylinder from deforming.
The locking shaft is a hollow pipe column, a locking ring for stopping the movement is arranged at the end, facing the rubber barrel, of the locking shaft, and the inner wall of the locking ring is in one-way sliding connection with the outer wall of the locking shaft through a blunt thread; the outer wall of the locking ring is fixedly connected with the rear end of the cone.
Wherein, the outer wall of locking ring and the rear end of cone pass through threaded connection.
Wherein, the lock shaft is fixedly connected with the central tube through a screw.
Wherein the locking ring is C-shaped.
Wherein, the front end of the cone is in sealing contact with the outer wall of the central tube through an O-shaped sealing ring II.
Wherein, still include the support cover, support the cover through the separable connection between shear pin and the cone.
Wherein the shear pin is arranged in the shear pin hole of the support sleeve.
And the outer wall of the cone is in sealing contact with the inner wall of the support sleeve through an O-shaped sealing ring I.
In the initial state, the supporting blocks are closely arranged along the circumference of the central pipe, namely, each supporting block is attached to the adjacent left and right supporting blocks to form a whole circular ring structure; after being pressed, the supporting blocks respectively perform expanding movement from the outer wall of the central tube, and supporting ring surfaces with gaps are formed on the supporting surfaces of the supporting blocks facing the shoulder parts of the rubber cylinder.
The supporting surface of the supporting block is fan-shaped.
The supporting block and the supporting sleeve are detachably connected through the first sliding block and the sliding groove structure.
Wherein, first slider, spout (promptly reserve the hole) are the T font.
And the radial inner end of the supporting block is provided with an anti-falling clamping block.
The supporting device comprises a plurality of supporting blocks and a plurality of auxiliary blocks, wherein the supporting blocks and the auxiliary blocks are arranged in a staggered manner, namely one auxiliary block is arranged between every two adjacent supporting blocks; the rear end of the auxiliary block is provided with an auxiliary inclined plane, and the front end of the auxiliary block is an auxiliary supporting surface for propping the shoulder of the rubber cylinder; after the expanding movement, the auxiliary supporting surfaces are respectively positioned in the gap between every two supporting surfaces and form a supporting ring surface together with the auxiliary supporting surfaces.
The auxiliary supporting surface of the auxiliary block is in a fan shape.
The auxiliary block and the support sleeve are detachably connected through a second sliding block and a sliding groove structure.
And the radial inner end of the auxiliary block is provided with an anti-falling clamping block.
The outer wall of the supporting block and/or the auxiliary block is provided with an annular groove, and the fixing ring is welded and installed in the annular groove; after being pressed, the supporting block and/or the auxiliary block are/is outward in the radial direction and destroy the fixing ring to perform expanding movement.
After the cone pushes the supporting block and the auxiliary block to perform expanding motion, the protruded clamping blocks can be clamped on the inner wall surfaces of the upper supporting sleeve and the lower supporting sleeve, so that the supporting block and the auxiliary block are prevented from being separated from the upper supporting sleeve and the lower supporting sleeve.
The utility model also provides a packing element strutting arrangement of big hole enlargement bore hole packer locates between two packing elements, including lock axle, two cones and the left and right two sets of supporting shoes that correspond, wherein: two ends of the lock shaft are respectively connected with the rear end of the cone in a one-way motion way, and the front end of the cone is provided with a first inclined plane; the rear end of the supporting block is provided with a second inclined plane, and the front end of the supporting block is a supporting surface; the cone is pressed to move towards the direction of the rubber cylinder along the shaft, the first inclined surface pushes the second inclined surface, and then the supporting block makes radial expansion movement until the supporting block is attached to the inner wall of the barefoot stratum; the support surface abuts against the shoulder of the rubber cylinder and prevents the rubber cylinder from deforming.
Wherein, the lock shaft is a hollow tubular column, and the middle part of the tubular body is provided with a bulge part to separate a left symmetrical structure and a right symmetrical structure; locking rings for stopping are respectively arranged at the left end and the right end of the locking shaft, which face the rubber cylinder, and the inner wall of each locking ring is in one-way sliding connection with the outer wall of the locking shaft through a blunt thread; the outer wall of the locking ring is fixedly connected with the rear end of the cone.
The supporting sleeve is formed by connecting an upper supporting sleeve and a lower supporting sleeve in sequence, and the upper supporting sleeve, the lower supporting sleeve and the protruding part are fixedly assembled; the upper supporting sleeve and the lower supporting sleeve are respectively in separable connection with the left cone and the right cone through shear pins. After being pressed, the shear pin is sheared, and the shear pin are separated.
Before the packer is set (namely in an initial state), the reserved gaps of the end surfaces of the upper support sleeve and the lower support sleeve are matched with the structures of the support block and the auxiliary block, and the complete circumferential end surface structure of the upper support sleeve and the complete circumferential end surface structure of the lower support sleeve are formed after the assembly is finished.
The groove structures of the supporting block and the auxiliary block are matched with each other to form a 360-degree circumferential groove structure, and the supporting block and the auxiliary block are matched with the fixing ring for use; the fixing ring has hoop protecting effect and fixes the support block and the auxiliary block.
Wherein, realize sealedly through O type sealing washer III between upper supporting sleeve, the lower supporting sleeve.
The supporting block and the auxiliary block are sequentially arranged in the preformed holes on the upper supporting sleeve and the lower supporting sleeve; when the device is installed, the device is assembled from the inside of the upper supporting sleeve and the inside of the lower supporting sleeve.
The utility model also provides a packer contains foretell packing element strutting arrangement.
Compared with the prior art, the utility model can effectively protect the rubber sleeve of the packer, and the cone moves towards the rubber sleeve under the action of hydraulic pushing after the packer is lowered to a designated position, so as to push the supporting block and the auxiliary block to expand outwards and break through the constraint of the fixing ring; the supporting block and the auxiliary block have expanding movement. After being pressed, the rubber sleeve of the packer directly acts on a supporting ring surface formed by the supporting sleeve, the supporting block and the auxiliary block, so that the rubber sleeve of the large-diameter-expanding open hole packer is effectively prevented from being damaged by shoulder projection caused by overlarge load under the action of one-way pressure difference, the sealing property of the packer is ensured, the bearing capacity of the rubber sleeve is improved, and the use requirement of the packer in the large-diameter-expanding open hole is met.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural view of an embodiment of the present invention in an initial state after assembly;
FIGS. 3a and 3b are a cross-sectional view and a perspective view, respectively, of the upper support sleeve;
figures 4a, 4b are a cross-sectional view and a perspective view, respectively, of the lower support sleeve;
FIGS. 5a, 5b and 5c are perspective, side and top views, respectively, of the support block;
FIGS. 6a, 6b and 6c are a perspective view, a side view and a top view, respectively, of an auxiliary block;
FIG. 7 is a schematic view of the structure of a cone;
FIG. 8 is a schematic view of the locking ring;
FIG. 8a is an enlarged fragmentary view taken at the circle in FIG. 8;
FIG. 9 is a schematic view of the end face of the support device after expansion;
FIG. 10 is a schematic structural view of an embodiment of the present invention after the packer is set;
FIG. 11 is a schematic view of the stent after expansion;
referring to the drawing, 1-upper support sleeve, 2-lower support sleeve, 3-lock shaft, 4-cone, 5-locking ring, 6-support block, 7-auxiliary block, 8-fixing ring, 9-shear pin, 10-screw, 11-O type seal ring I, 12-O type seal ring II, 13-O type seal ring III, 14-upper support sleeve groove I, 15-upper support sleeve groove II, 16-rubber cylinder, 17-open hole stratum; 18-annulus, i.e. between the formation and the packer; 19-a shear pin hole, 20-a supporting block fixture block and 21-an auxiliary block fixture block.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 shows an embodiment of the present invention, which is a packer having a packing element support device between two packing elements 16, and an annular space 18 is formed between the packing elements 16 and an open hole formation 17; specifically including lock shaft 3, two dorsad cones 4 and the left and right two sets of supporting shoe 6 that correspond, every group includes eight supporting shoes 6 (quantity can be selected for use in a flexible way, does not regard as right the utility model discloses a restriction). The two ends of the lock shaft 3 and the rear end of the cone 4 are respectively in one-way motion connection (namely the cone 4 only can move far away from the lock shaft 3), and the front end of the cone 3 is provided with a first inclined plane; the rear end of the supporting block 6 is provided with a second inclined plane, and the front end of the supporting block 6 is a supporting surface. Meanwhile, the device also comprises eight auxiliary blocks 7, and the auxiliary blocks 7 and the supporting blocks 6 are arranged in a staggered manner. Referring to fig. 9 and 11, the auxiliary blocks 7 are arranged in a staggered manner, namely, between adjacent supporting blocks 6.
The rear end of the auxiliary block 7 is provided with an auxiliary inclined plane, and the front end of the auxiliary block 7 is an auxiliary supporting surface for supporting the shoulder of the rubber cylinder 16; after the expanding movement, the auxiliary supporting surfaces are respectively positioned in the gap between every two supporting surfaces and form a supporting ring surface together with the auxiliary supporting surfaces.
Referring to fig. 7, 8 and 8a, the lock shaft 3 is a hollow tubular column, and a protruding part is arranged in the middle of the tubular body to separate left and right symmetrical structures; the left end and the right end of the locking shaft 3 facing the rubber cylinder 16 are respectively provided with a locking ring 5 for stopping back, and the inner wall of the locking ring 5 is in one-way sliding connection with the outer wall of the locking shaft 3 through a blunt thread; the outer wall of the locking ring 5 is fixedly connected with the rear end of the cone 4.
Referring to fig. 1 and 8, fig. 8a, the outer wall of the locking ring 5 and the rear end of the cone 3 are connected by a screw thread, where the connection is a fixed connection; referring to fig. 1, the contact part of the inner wall of the rear end of the cone 4 and the outer wall of the lock shaft 3 is also connected by the blunt thread to form a one-way movement connection structure.
Referring to fig. 1, the lock shaft 3 is fixedly connected to the center tube by a screw 10. Preferably, the locking ring 5 in this embodiment is C-shaped.
Referring to fig. 1, in addition, the front end of the cone 3 is in sealing contact with the outer wall of the central tube through O-shaped sealing rings I and 12, so that the tightness is ensured.
Referring to fig. 1 to 4b, the support sleeve is formed by connecting an upper support sleeve 1 and a lower support sleeve 2 in sequence, and the upper support sleeve 1, the lower support sleeve 2 and the protruding part of the lock shaft 3 are fixedly assembled. The upper supporting sleeve 1 and the lower supporting sleeve 2 are separately connected with the left cone 4 and the right cone 4 through shear pins 9. The separable connection is that after being pressed, the shear pin 9 is sheared, the two are separated and generate relative movement, the cone 4 continues to move towards the rubber sleeve 16, and the upper support sleeve 1 or the lower support sleeve 2 maintains a static state.
Referring to fig. 3 and 4, shear pins 9 are respectively arranged in shear pin holes 19 of the upper support sleeve 1 and the lower support sleeve 2, and the shear pin holes 19 penetrate through the side walls of the upper support sleeve 1 and the lower support sleeve 2; the number of the shear pins 9 and the shear pin holes 19 corresponds to that of the supporting blocks 6 and the auxiliary blocks 7.
Referring to fig. 1, the outer wall of the cone 3 and the inner walls of the upper support sleeve 1 and the lower support sleeve 2 are in sealing contact through an O-shaped sealing ring I11, and the tightness is ensured.
Referring to fig. 2 to 4b, before setting the packer (i.e., in an initial state), the preformed holes on the end surfaces of the upper support sleeve 1 and the lower support sleeve 2 are matched with the corresponding structures of the support block 6 and the auxiliary block 7 to respectively form a first slide block, a chute structure, a second slide block and a chute structure; the first sliding block, the sliding groove structure, the second sliding block and the sliding groove structure are in separable connection, namely the supporting block 6 and the auxiliary block 7 slide out (expand) in the radial direction along the sliding groove (the preformed hole) through the sliding block at the rear end. And the assembled structure is a complete circumferential end surface structure of the upper support sleeve 1 and a complete circumferential end surface structure of the lower support sleeve 2.
At the moment, the supporting blocks 6 and the auxiliary blocks 7 are respectively tightly attached and closely arranged around the circumference of the outer wall of the central tube, namely, each supporting block 6 is attached to the adjacent supporting block 6 to form a whole circular ring structure; after being pressed, the supporting blocks 6 respectively do expanding movement from the outer wall of the central tube, and supporting ring surfaces with gaps are formed by the supporting blocks 6 facing the shoulder parts of the rubber barrel 16.
Referring to fig. 5a to 6c, preferably, the supporting surface of the supporting block 6 is fan-shaped; the first sliding block and the sliding groove are T-shaped. The radial inner end of the supporting block 6 is provided with a supporting block fixture block 20 which can prevent falling.
Preferably, the auxiliary support surface of the auxiliary block 7 is fan-shaped. The auxiliary block 7 and the supporting sleeve are detachably connected through a second sliding block and a sliding groove structure. The radial inner end of the auxiliary block 7 is provided with an anti-falling auxiliary block clamping block 21. Referring to fig. 1, the outer walls of the supporting block 6 and the auxiliary block 7 are provided with annular grooves, and the fixing ring 8 is installed in the annular grooves; furthermore, the groove structures of the supporting block 6 and the auxiliary block 7 are mutually matched to form a 360-degree circumferential groove structure, and the supporting block and the auxiliary block are matched with the fixing ring 8 for use; the fixing ring 8 plays a role of hoop protection and fixes the supporting block and the auxiliary block; after being pressed, the supporting block 6 and the auxiliary block 7 are radially outward and break the fixed ring 8 to perform expanding movement.
Further, a supporting block 6 and an auxiliary block 7 are sequentially installed in the preformed holes on the upper supporting sleeve 1 and the lower supporting sleeve 2; when the device is installed, the device is assembled from the inside of the upper supporting sleeve and the inside of the lower supporting sleeve.
Referring to fig. 1, the upper support sleeve 1 and the lower support sleeve 2 are sealed by an O-ring III13, so as to ensure the sealing property.
In the setting process of the packer, under the action of hydraulic pressure, the cone 4 performs piston movement in the direction away from the central axis of the lock shaft 3 under the pushing action of the O-shaped sealing ring I11 outside the cone 4 and the O-shaped sealing ring II12 inside the cone 4. At the same time, the teeth of the locking ring 5 inside the cone 3 move along the outer spiral wall of the lock shaft 3 in a direction away from the center of the lock shaft.
Referring to fig. 8 and 8a, because the outer wall surface of the lock shaft 3 is provided with the blunt thread, the tooth block of the locking ring 5 can only move in one direction in the direction away from the central axis of the lock shaft; once reversed, the teeth of the locking ring 5 will seize against the outer wall of the locking shaft 3, so that the cone 4 cannot be reversed.
Once the cone 4 is pushed by hydraulic pressure to move away from the lock shaft 3, the copper shear pins 9 binding the cone 4 are subjected to corresponding shear force; the hydraulic pressure is increased continuously, and the shear pins 9 are sheared when the shear strength of the shear pins 9 is exceeded and fall into the shear pin holes 19 of the upper support sleeve 1 and the shear pin holes 19 of the lower support sleeve 2. After the shear pin 9 is sheared, the cone 4 breaks free from the shear pin 9 and moves away from the lock shaft 3.
The cone 4 moves in the direction far away from the lock shaft 3, the first inclined surface at the front end of the cone 4 pushes and extrudes the second inclined surfaces of the supporting block 6 and the auxiliary block 7 and the inclined surfaces of the auxiliary block, the supporting block 6 and the auxiliary block 7 move in the expanding direction under the stress, and the fixing ring 8 hooped in the grooves of the supporting block 6 and the auxiliary block 7 is subjected to the expansion force. The hydraulic pressure born by the cone 4 is increased, the acting force on the cone 4 is increased, the acting force of the cone 4 for pushing the supporting block 6 and the auxiliary block 7 is increased, and the expansion force born by the supporting block 6 and the auxiliary block 7 is increased. When the expansion force is larger than the tension of the fixing ring 8, the fixing ring 8 is damaged and loses the hoop protection effect, and the supporting blocks 6 and the auxiliary blocks 7 expand outwards under the pushing of the cone 4 until the outer wall surfaces of the supporting blocks 6 and the auxiliary blocks 7 are attached to the barefoot stratum 17.
Referring to fig. 9 and 10, the supporting block 6 and the auxiliary block 7 are subjected to expanding movement, the supporting device is expanded, and the supporting block 6 and the auxiliary block 7 are pushed to the wall of the open hole stratum 17. The packer packing element 16 is forced to compress and the shoulder of the packing element 16 abuts the expanded support block 6 of the support device, this embodiment preventing the packing element 16 from squeezing into the annular space 18 between the packer and the open hole formation 17.
Further, referring to fig. 11, after the expanding movement of the supporting block of the present embodiment, a gap exists on the supporting ring surface formed by the supporting block 6. When the rubber tube 16 is subjected to a large force, the shoulder of the rubber tube 16 still extends into the gap. At this time, the auxiliary block 7 below the supporting block 6 plays a role of auxiliary secondary support, so that the rubber sleeve 16 does not continue to extend to the annular space 18 between the rubber sleeve 16 and the open hole stratum 17, and the function of protecting the rubber sleeve is completed.
This embodiment can effectively protect packer packing element for the packing element 16 of packer pressurized back, direct action prevents that packing element 16 from taking place extrusion deformation along packer and sheathed tube annular space and damaging, guarantees the leakproofness of packer on the support anchor ring face that support cover, supporting shoe 6 and auxiliary block 7 formed.
The utility model discloses can also locate the unilateral of packing element 16, its structure and above-mentioned thunder are the same, do not give the repeated description.
The embodiments of the present invention have been described in conjunction with the accompanying drawings and examples, the structures of which are not intended to limit the present invention, and those skilled in the art can make modifications as required, and all changes and modifications within the scope of the appended claims are within the scope of protection.
Claims (25)
1. The utility model provides a big expanding bore hole packer's packing element strutting arrangement, locates the tip of packing element, its characterized in that: including the lock axle to and cone, a plurality of supporting shoe, wherein:
the lock shaft is connected with the rear end of the cone in a one-way motion mode, and the front end of the cone is provided with a first inclined surface;
the rear end of the supporting block is provided with a second inclined plane, and the front end of the supporting block is a supporting surface;
the cone is pressed to move towards the direction of the rubber cylinder along the shaft, the first inclined surface pushes the second inclined surface, and then the supporting block makes radial expansion movement until the supporting block is attached to the inner wall of the barefoot stratum; the support surface abuts against the shoulder of the rubber cylinder and prevents the rubber cylinder from deforming.
2. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 1, wherein: the locking shaft is a hollow tubular column, a locking ring for stopping the movement is arranged at the end, facing the rubber barrel, of the locking shaft, and the inner wall of the locking ring is in one-way sliding connection with the outer wall of the locking shaft through a blunt thread; the outer wall of the locking ring is fixedly connected with the rear end of the cone.
3. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 2, wherein: the outer wall of the locking ring is connected with the rear end of the cone through threads.
4. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 2, wherein: the lock shaft is fixedly connected with the central tube through a screw.
5. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 2, wherein: the locking ring is C-shaped.
6. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 2, wherein: the front end of the cone is in sealing contact with the outer wall of the central tube through an O-shaped sealing ring II.
7. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 1, wherein: the support sleeve is detachably connected with the cone through the shear pin.
8. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 7, wherein: the shear pin is arranged in the shear pin hole of the support sleeve.
9. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 7, wherein: the outer wall of the cone and the inner wall of the support sleeve are in sealing contact through an O-shaped sealing ring I.
10. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 7, wherein: in an initial state, the supporting blocks are closely arranged along the circumference of the central pipe, namely, each supporting block is attached to the adjacent left and right supporting blocks to form a whole circular ring structure; after being pressed, the supporting blocks respectively perform expanding movement from the outer wall of the central tube, and supporting ring surfaces with gaps are formed on the supporting surfaces of the supporting blocks facing the shoulder parts of the rubber cylinder.
11. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 7, wherein: the supporting surface of the supporting block is fan-shaped.
12. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 7, wherein: the supporting block and the supporting sleeve are detachably connected through the first sliding block and the sliding groove structure.
13. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 12, wherein: the first sliding block and the sliding groove are T-shaped.
14. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 7, wherein: and the radial inner end of the supporting block is provided with an anti-falling clamping block.
15. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in any one of claims 1 to 14, wherein: the supporting blocks are arranged in a staggered mode; the rear end of the auxiliary block is provided with an auxiliary inclined plane, and the front end of the auxiliary block is an auxiliary supporting surface; after the expanding movement, the auxiliary supporting surfaces are respectively positioned in the gap between every two supporting surfaces and form a supporting ring surface together with the auxiliary supporting surfaces.
16. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 15, wherein: the auxiliary supporting surface of the auxiliary block is in a fan shape.
17. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 15, wherein: the auxiliary block and the supporting sleeve are detachably connected through a second sliding block and a sliding groove structure.
18. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 15, wherein: and the radial inner end of the auxiliary block is provided with an anti-falling clamping block.
19. The packing element support device of the large-diameter-expansion open hole packer according to any one of claims 1-14 and 16-18, wherein: the outer wall of the supporting block and/or the auxiliary block is provided with an annular groove, and the fixing ring is arranged in the annular groove; after being pressed, the supporting block and/or the auxiliary block are/is outward in radial direction and destroy the fixing ring to perform expanding movement.
20. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 19, wherein: after the cone pushes the supporting block and the auxiliary block to perform expanding motion, the protruded clamping blocks can be clamped on the inner wall surfaces of the upper supporting sleeve and the lower supporting sleeve, so that the supporting block and the auxiliary block are prevented from being separated from the upper supporting sleeve and the lower supporting sleeve.
21. The rubber sleeve supporting device of the large-diameter-expansion open hole packer as claimed in claim 15, wherein: the outer wall of the supporting block and/or the auxiliary block is provided with an annular groove, and the fixing ring is arranged in the annular groove; after being pressed, the supporting block and/or the auxiliary block are/is outward in radial direction and destroy the fixing ring to perform expanding movement.
22. The packing element support device of the large-diameter-expansion open hole packer according to claim 21, wherein: after the cone pushes the supporting block and the auxiliary block to perform expanding motion, the protruded clamping blocks can be clamped on the inner wall surfaces of the upper supporting sleeve and the lower supporting sleeve, so that the supporting block and the auxiliary block are prevented from being separated from the upper supporting sleeve and the lower supporting sleeve.
23. The utility model provides a rubber sleeve strutting arrangement of big hole enlargement bore hole packer, locates between two rubber sleeves, its characterized in that: including lock axle, two cones to and two sets of supporting shoes that correspond, wherein:
two ends of the lock shaft are respectively connected with the rear end of the cone in a one-way motion way, and the front end of the cone is provided with a first inclined plane;
the rear end of the supporting block is provided with a second inclined plane, and the front end of the supporting block is a supporting surface;
the cone is pressed to move towards the direction of the rubber cylinder along the shaft, the first inclined surface pushes the second inclined surface, and then the supporting block makes radial expansion movement until the supporting block is attached to the inner wall of the barefoot stratum; the support surface abuts against the shoulder of the rubber cylinder and prevents the rubber cylinder from deforming.
24. The packing element support device of the large-diameter-expansion open hole packer according to claim 23, wherein: the lock shaft is a hollow tubular column, and the middle part of the tubular body of the lock shaft is provided with a convex part for dividing a left symmetrical structure and a right symmetrical structure; locking rings for stopping are respectively arranged at the left end and the right end of the locking shaft, which face the rubber cylinder, and the inner wall of each locking ring is in one-way sliding connection with the outer wall of the locking shaft through a blunt thread; the outer wall of the locking ring is fixedly connected with the rear end of the cone.
25. A packer, its characterized in that: a cartridge support apparatus comprising a cartridge as claimed in any preceding claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920452003.7U CN209855745U (en) | 2019-04-04 | 2019-04-04 | Rubber sleeve supporting device of large-diameter-expansion open hole packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920452003.7U CN209855745U (en) | 2019-04-04 | 2019-04-04 | Rubber sleeve supporting device of large-diameter-expansion open hole packer |
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| CN209855745U true CN209855745U (en) | 2019-12-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110388191A (en) * | 2019-04-04 | 2019-10-29 | 上海优强石油科技有限公司 | The packing element support device of big expanding open hole well packer |
| CN113338840A (en) * | 2021-06-29 | 2021-09-03 | 郭洪霞 | Oil field downhole packer with strong bearing capacity |
-
2019
- 2019-04-04 CN CN201920452003.7U patent/CN209855745U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110388191A (en) * | 2019-04-04 | 2019-10-29 | 上海优强石油科技有限公司 | The packing element support device of big expanding open hole well packer |
| CN110388191B (en) * | 2019-04-04 | 2024-06-14 | 上海优强石油科技有限公司 | Rubber cylinder supporting device of large-expansion open hole well packer and packer |
| CN113338840A (en) * | 2021-06-29 | 2021-09-03 | 郭洪霞 | Oil field downhole packer with strong bearing capacity |
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| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yu Junquan Inventor after: Sun Deqi Inventor after: Zhang Weibo Inventor after: Zheng Lingyun Inventor after: Yang Yanchao Inventor before: Yu Junquan Inventor before: Sun Deqi Inventor before: Zhang Weibo Inventor before: Zheng Lingyun |
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| CB03 | Change of inventor or designer information |