CN113944440A - Section hoop and clamping seat - Google Patents
Section hoop and clamping seat Download PDFInfo
- Publication number
- CN113944440A CN113944440A CN202010681266.2A CN202010681266A CN113944440A CN 113944440 A CN113944440 A CN 113944440A CN 202010681266 A CN202010681266 A CN 202010681266A CN 113944440 A CN113944440 A CN 113944440A
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- Prior art keywords
- hoop
- sealing ring
- joint
- slip
- slips
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- 238000007789 sealing Methods 0.000 claims abstract description 95
- 239000002184 metal Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 238000004873 anchoring Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 6
- 210000003734 kidney Anatomy 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 4
- 239000003208 petroleum Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 12
- 230000009286 beneficial effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 241001391944 Commicarpus scandens Species 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000033558 biomineral tissue development Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/261—Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention relates to the field of petroleum underground construction, in particular to a joint hoop and a clamping seat, wherein the joint hoop is a plastic deformation component, a conical internal channel is arranged in the axial direction of the joint hoop and comprises a sealing ring and a slip which are arranged into an integral structure, one end of the slip is connected with the sealing ring, a plurality of circumferential groove holes vertical to the axis of the joint hoop are formed in the circumferential direction of one end of the slip, and a plurality of axial strip-shaped grooves parallel to the axial direction of the joint hoop are formed in the circumferential direction of the other end of the slip. Because a plurality of circumferential groove holes vertical to the axis of the joint hoop are formed in the circumferential direction of one end of the slip, the circumferential groove holes can be longer, and thus the stress of the slip at the joint of the sealing ring can be fully released; meanwhile, the holes are arranged in a strip shape, so that the whole slip cannot occupy too large area, and the strength of the slip cannot be influenced basically.
Description
Technical Field
The invention relates to the field of petroleum underground construction, in particular to a joint hoop and a clamping seat.
Background
The bridge plug and the ball seat are widely applied to sleeve packing for fracturing modification and acidification of oil and gas wells. In the construction of fracturing reconstruction, it is a common practice to set a ball seat or a bridge plug at a designated position of a downhole sleeve by a cable or a hydraulic setting tool, then pump a fracturing ball to plug an internal passage of the ball seat or the bridge plug set in the well, perforate the inside of the sleeve above the setting position, and perform fracturing reconstruction after the setting tool is lifted out. After the above-mentioned operation is accomplished, need to form full latus rectum sleeve: if the ball seat or the bridge plug is of a soluble structure and the fracturing ball is of a soluble structure, the fracturing ball can be dissolved by itself until the sleeve forms a full path to meet the requirements of flowback and production; if the ball seat or the bridge plug in the well is of an insoluble structure or the fracturing ball is of an insoluble structure, the ball seat or (and) the fracturing ball needs to be drilled and ground, and residues after drilling and grinding are circularly discharged out of the well to form a sleeve with a full drift diameter.
The sealing ring and the slips of current bridging plug and ball seat generally adopt split type structure, and the sealing ring passes through a awl section of thick bamboo extrusion inflation, and is sealed with the sleeve inner wall, and slips and sleeve inner wall anchoring form the extrusion to the sealing ring, and one side bearing pressure of sealing ring after setting, and the anchored slips plays the bearing effect to the sealing ring, avoids sealing ring and sleeve to break away from, influences telescopic sealed effect. Most of the existing products are designed by separating slips, cones and sealing structures, so that the existing products have more components and low reliability, and if the existing products are soluble products, the total dissolving time is increased.
Disclosure of Invention
The invention aims to provide a joint hoop and a clamping seat, which improve the stress release effect of an integrated sealing slip structure and ensure the strength and reliability of the slip.
The technical scheme for solving the technical problems is as follows: the utility model provides a section hoop, section hoop is the plastic deformation component be equipped with conical inner channel in section hoop's the axial, including sealing ring and the slips that sets up to a body structure, wherein, the sealing ring radially produces the back surface of warping sealed with the sleeve inner wall, the slips radially opens and with sleeve inner wall anchoring, the one end of slips with the sealing ring is connected, be equipped with the several in the circumference of the one end of slips with section hoop's axis vertically circumference slotted hole, be equipped with the several in the circumference of the other end of slips with section hoop's axial direction bar groove.
The working principle and the beneficial effects of the invention are as follows: because a plurality of circumferential groove holes vertical to the axis of the joint hoop are formed in the circumferential direction of one end of the slip, the circumferential groove holes can be longer and used for releasing the circumferential stress of the slip, so that the stress at the joint of the sealing ring of the slip can be fully released, the sealing effect of the sealing ring cannot be influenced, the slip is easy to break and open, the stress cannot be generated, and the reliability of the slip is also improved; meanwhile, the holes are arranged in a strip shape, so that the whole slip cannot occupy too large area, and the strength of the slip cannot be influenced basically.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the axial strip-shaped groove is communicated with the circumferential groove hole.
The beneficial effect of adopting the further scheme is that: the axial strip-shaped groove is communicated with the circumferential groove hole, and the slips are convenient to break at the position of the connecting end of the slip and the sealing ring to realize anchoring with the inner wall of the sleeve.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the axial strip-shaped groove penetrates through the end face of the other end of the slip.
The beneficial effect of adopting the further scheme is that: because axial bar groove has run through whole slips, at the setting in-process, the both ends of slips all break easily and open, realize with sleeve inner wall anchoring.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the circumferential groove hole is a polygonal groove hole, an elliptical groove hole, a circular groove hole or a kidney-shaped groove hole.
The beneficial effect of adopting the further scheme is that: circumferential slotted holes in different shapes are arranged according to different materials and use conditions, so that the maximum effective area for releasing the slip stress is ensured.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, a ratio of a total length of the plurality of circumferential slots in the circumferential direction to a circumference of the seal ring is between 1/4 and 4/5.
The beneficial effect of adopting the further scheme is that: the total length of the circumferential slot in the circumferential direction accounts for 1/4-4/5 of the circumference of the sealing ring, so that the slips are easy to break and open during setting; meanwhile, the best effect is ensured by the stress release and the strength of the slips.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the circumferential groove hole has a distance from the sealing ring. .
The beneficial effect of adopting the further scheme is that: the circumferential groove hole has a distance with the sealing ring, so that the slip is prevented from being broken and opened, the sealing ring is prevented from being affected, stress is prevented from being generated on the sealing ring, and the reliability of the sealing ring is ensured.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, the joint hoop is a metal component with the elongation rate of 14% -50%.
The beneficial effect of adopting the further scheme is that: the joint hoop is a metal component with the elongation rate of 14% -50%, and the sealing ring has enough plastic deformation in the expansion deformation process of the joint hoop, so that the sealing ring can realize good sealing effect with the inner wall of the sleeve.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the metal member is a soluble metal that is soluble in downhole fluids.
The beneficial effect of adopting the further scheme is that: the soluble metal is the metal which can be dissolved in the liquid with the corresponding degree of mineralization, so that the joint hoop can be dissolved conveniently; when the well is required to be opened, the joint hoop can be automatically dissolved in well fluid and cannot be left.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, a sealing ring with a surface seal formed by the inner wall of the sleeve is axially arranged on the sealing ring.
The beneficial effect of adopting the further scheme is that: through the metal seal of the sealing ring and the surface seal of the sealing ring, the double sealing effect of two surface seals is realized, and the sealing reliability of the joint hoop is improved.
The invention also provides a clamping seat which comprises a lower joint and the joint hoop, wherein the lower joint is provided with a through hole communicated with the internal channel, and the slip is abutted against the other end of the lower joint.
The card seat has the beneficial effects that: because the clamping seat comprises the joint hoop, the lower joint is connected with a setting tool to perform setting, after the setting is completed, the joint hoop is anchored with the inner wall of the sleeve and sealed with the sleeve, and the lower joint is separated from the joint hoop and falls off. Because the circumference of one end of the slips is provided with a plurality of circumferential groove holes vertical to the axis of the joint hoop, the circumferential groove holes can be arranged to be longer, and the slips can release the stress at the joint of the sealing ring more fully. Meanwhile, the holes are arranged in a strip shape, so that the whole slip cannot occupy too large area, and the strength of the slip cannot be influenced basically.
Drawings
FIG. 1 is a schematic perspective view of a coupling of an embodiment of the present invention;
FIG. 2 is a view in one direction of a first embodiment of the joint hoop of the present invention;
FIG. 3 is a partial view of A of FIG. 2;
FIG. 4 is a cross-sectional view of a first embodiment of the joint hoop of the present invention;
FIG. 5 is a view in one direction of a second embodiment of the joint hoop of the present invention;
FIG. 6 is a view in one direction of a third alternative embodiment of the joint hoop of the present invention;
FIG. 7 is a view in one direction of a fourth alternative embodiment of the joint hoop of the present invention;
FIG. 8 is a view in one direction of a fifth alternative embodiment of the joint hoop of the present invention;
FIG. 9 is a view in one direction of a first embodiment of a cartridge of the present invention;
FIG. 10 is a cross-sectional view of a first embodiment of the cartridge of the present invention;
FIG. 11 is a schematic view of a setting operation according to an embodiment of the invention;
FIG. 12 is a view of a setting operation in a sleeve of an embodiment of the joint band of the present invention;
FIG. 13 is a view of the operative state of the coupling embodiment of the present invention including a blocking body in the sleeve.
In the drawings, the components represented by the respective reference numerals are listed below:
1. sealing ring, 11, sealing washer, 2, slips, 21, circumference slotted hole, 22, axial bar groove, 23, slips tooth's socket, 24, slips tooth, 3, lower clutch, 4, sleeve, 5, shutoff body, 6, hand-throwing pole, 7, setting section of thick bamboo, 8, adaptation joint, 9, a push cylinder.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Fig. 1 to 4 show a schematic structural view of an embodiment of the joint hoop of the present invention. A section hoop is a plastic deformation component, a conical internal channel is arranged in the axial direction of the section hoop and comprises a sealing ring 1 and a slip 2 which are arranged into an integral structure, wherein the outer surface of the sealing ring 1 is sealed with the inner wall of a sleeve 4 after deformation is generated in the radial direction, the slip 2 is radially expanded and anchored with the inner wall of the sleeve 4, one end of the slip 2 is connected with the sealing ring 1, a plurality of circumferential groove holes 21 which are vertical to the axial line of the section hoop are formed in the circumferential direction of one end of the slip 2, and a plurality of axial strip-shaped grooves 22 which are parallel to the axial direction of the section hoop are formed in the circumferential direction of the other end of the slip 2; when the circumferential groove hole 21 is pressed by an external force in the axial direction thereof, both long sides of the circumferential groove hole 21 abut to form surface contact.
In this embodiment, the aperture of the inner channel of the sealing ring 1 end is greater than the inner channel of the slip 2 end, so that the sealing ring end is ensured to be expanded and deformed first, and the phenomenon that the joint hoop is clamped on the inner wall of the sleeve and cannot work normally due to the fact that the slip end is expanded first is avoided. The taper of the internal passage is 10 degrees, so that the sealing ring is easy to expand by a tool when the sealing ring is set, and the slip is easy to break and open.
In a specific embodiment, the taper of the internal channel can be in the range of 5 degrees to 30 degrees, and the taper is set according to different materials, actual working conditions under the sleeve and the like, so that the work of the joint hoop reaches the optimal state, and the setting sealing effect reaches the best.
The circumferential slotted hole is a slotted hole arranged in the circumferential direction of the slip, and the slotted hole extends in the circumferential direction of the slip. For example, in the embodiment, the circumferential slot 21 is a kidney-shaped slot, that is, the long side of the kidney-shaped slot is consistent with the circumferential direction of the slip, and the short side of the kidney-shaped slot is perpendicular to the circumferential direction of the slip, that is, the short side of the kidney-shaped slot is consistent with the axial direction of the slip.
Because the circumference of 2 one ends of slips is equipped with several circumference slotted holes 21 perpendicular with the axis of section hoop, circumference slotted hole 21 can set up for longer, and the slips 2 will release more fully in the stress of sealing ring junction like this. At the same time, the holes do not occupy too large an area of the entire slip 21, and do not substantially affect the strength of the slip 21.
In the present embodiment, the axial groove 22 communicates with the circumferential groove hole 21, and the axial groove 22 penetrates an end surface of the other end of the slip 2. During setting, the slips 2 are easily broken open to achieve anchoring with the inner wall of the casing 4.
In the embodiment, the circumferential slot 21 is a kidney-shaped slot (see fig. 3 in particular), two long sides of the kidney-shaped slot are parallel to each other and have a longer length, and the area of the slip 21 for releasing stress is the largest under the condition of occupying a smaller area of the slip 2.
In the present embodiment, the total number of the circumferential groove holes 21 is seven, the corresponding axial strip-shaped grooves 22 are also seven, and the ratio of the total length of the seven circumferential groove holes 21 in the circumferential direction to the circumferential length of the seal ring 1 is 1/2. In a particular embodiment, the ratio of the total length of the circumferential slots 21 in the circumferential direction to the perimeter of the sealing ring 1 is chosen between 1/4 and 4/5. When the ratio is set at 4/5, i.e., the length of the circumferential slot 21 is longer, the area of stress relief at the joint of the slips 2 and the seal ring 1 is maximized and the stress relief is optimized.
The axial strip-shaped groove 22 is mainly used for facilitating the cracking and opening of the slip 2 in the setting process of the joint hoop, and the width of the groove is only 2-3 mm; the width of the circumferential groove hole 21 is set to be 5-10mm greater than the width of the axial strip 22. In a specific embodiment, the number, length and width of the axial slots 22 and the circumferential slots 21 can be adjusted adaptively according to the downhole conditions of the joint hoop, the outer diameter and the inner diameter of the joint hoop, the length of the joint hoop and the material properties of the joint hoop.
In this embodiment, the joint hoop is a soluble metal member with an elongation of 14% to 50%.
The joint hoop is a metal component with the elongation rate of 14% -50%, and in the expansion deformation process of the joint hoop, the sealing ring 1 has enough plastic deformation, so that the sealing ring 1 and the inner wall of the sleeve 4 can realize good sealing effect. Meanwhile, when the well is required to be dredged, the joint hoop can be automatically dissolved in well fluid and cannot be left. By soluble metal is meant a metal which is capable of dissolving in a liquid of the corresponding degree of mineralization. In particular embodiments, depending on the actual downhole conditions, a substance to promote dissolution of soluble metals may be added to the well fluid to accelerate the dissolution of the joint band.
In this embodiment, a groove for placing a sealing ring 11 (not shown in the figures) is axially formed in the outer surface of the sealing ring 1, the sealing ring 11 is made of plastic, so that deformation is facilitated to form sealing with the inner wall of the sleeve 4, a double sealing effect of two surface sealing is realized through metal sealing of the sealing ring 1 and surface sealing of the sealing ring 11, and the sealing reliability of the joint hoop is improved.
In this embodiment, the circumferential groove 21 has a distance from the sealing ring 1, so as to ensure that the slip 2 is broken and opened without affecting the sealing ring 1, and the sealing ring 1 is not stressed, thereby ensuring the reliability of the sealing ring 1.
In this embodiment, the slips 2 are anchored to the inner wall of the casing 4 by slip teeth 24 (not shown in the figures), the slip teeth 24 are arranged in slip tooth grooves 23 on the surface of the slips 2, the slip teeth 24 are of a cylindrical structure, the slip teeth 24 are arranged in 14, and every two slip teeth 24 are in one group. The number and placement of the slip teeth 24 may vary depending on the force and design requirements. The slip tooth grooves 23 are uniformly arranged on the slip 2, when the slip 2 is stressed to be opened, the slip teeth 24 are anchored into the casing well, and the anchoring effect of the slip 2 is better.
In a second embodiment of the joint hoop of the invention, as seen in fig. 5, compared to the first embodiment, the difference is that the axial strip-shaped groove 22 of the slip 2 is arranged in the middle of the slip 2 and does not penetrate the circumferential groove 21 and the end face of the other end of the slip 2. This arrangement facilitates the integrity of the slip 2 during forced expansion.
A third embodiment of the joint band of the invention is shown in one directional view in figure 6, compared to the first embodiment, with the difference that the axial slots 22 in the slips 2 communicate with the circumferential slot 21. For the section hoops made of different materials, the axial strip-shaped grooves 22 with different lengths are arranged, so that the practical use of the section hoops is facilitated.
A fourth embodiment of the joint band of the present invention is seen in one directional view in figure 7, in contrast to the first embodiment, in that an axial strip 22 extends through the end face of the other end of the slip 2. The slips tooth 24 is close to the other end of slips 2, and axial bar groove 22 runs through the terminal surface of the other end of slips 2, and at the open in-process of slips 2 atress, the slips tooth 24 of here is convenient for realize initial anchoring with the sleeve 4 inner wall.
Referring to fig. 8, a view in one direction of a fifth embodiment of the joint hoop of the present invention is different from the first embodiment in that the circumferential slot 21 is a rectangular slot, two long sides of the rectangular slot are parallel to each other, and there are no rounded corners at four corners, so as to further increase the area of the slip stress relief.
In specific embodiments, the circumferential slots may also be configured as circular, or other polygonal shaped slots, such as diamond shaped slots, hexagonal shaped slots, and the like.
Referring to fig. 9 and 10, a first embodiment of the clamping base of the invention is shown in a schematic structural view, wherein the clamping base comprises a lower joint 3 and the joint hoop, the lower joint 3 is provided with a through hole communicated with an internal channel, and a slip 2 is abutted against the other end of the lower joint 3. Wherein the specific structure of festival hoop does:
the joint hoop is a plastic deformation component, a conical inner channel is arranged in the axial direction of the joint hoop, and the joint hoop comprises a sealing ring 1 and a slip 2 which are arranged into an integral structure. The outer surface of the sealing ring 1 is sealed with the inner wall of the sleeve 4 after being radially deformed, the slip 2 is radially expanded and anchored with the inner wall of the sleeve 4, one end of the slip 2 is connected with the sealing ring 1, seven circumferential groove holes 21 vertical to the axis of the joint hoop are formed in the circumferential direction of one end of the slip 2, and seven axial strip-shaped grooves 22 parallel to the axial direction of the joint hoop are formed in the circumferential direction of the other end of the slip 2. The axial bar-shaped groove 22 is communicated with the circumferential groove hole 21, the axial bar-shaped groove 22 penetrates through the end face of the other end of the slip 2, and the circumferential groove hole 21 is a waist-shaped groove. A seal ring 11 is axially arranged on the outer surface of the seal ring 1, and the seal ring 11 and the inner wall of the sleeve 4 form a sealing belt for surface sealing.
Because the cassette includes above-mentioned festival hoop, the lower clutch 3 is connected with the setting instrument and is set up, sets up after sealing up, and festival hoop and the anchor of 4 inner walls of sleeve are rather than sealed, and lower clutch 3 drops with festival hoop separation. Because the circumference of one end of slips 2 is equipped with several circumference slotted holes 21 perpendicular with the axis of section hoop, circumference slotted hole 21 can set up for longer, and slips 2 will release more fully in the stress of sealing ring junction like this. Meanwhile, the holes are arranged into long strip shapes (kidney-shaped slotted holes), so that the whole slip 2 cannot be occupied in a large area, and the strength of the slip 2 cannot be basically influenced.
Fig. 11 to 13 show a setting process and a plugging state in a section hoop embodiment of the present invention. One end of a releasing rod 6 of the recoverable expansion cone is connected with one end of an adaptive joint 8 of the recoverable expansion cone, and the other end of the releasing rod is detachably connected with a lower joint 33. Specifically, the end of the releasing rod 6 is connected to the lower joint 34 of the clamping seat through a pin, and when the acting force between the releasing rod 6 and the lower joint 34 is too large, the pin can be cut off, so that the recyclable expansion cone and the clamping band are separated. And the outer wall of the setting cylinder 7 of the recoverable expansion cone, which is close to one end of the joint hoop, is matched and abutted against the inner wall of the joint hoop. Specifically, in fig. 11, the outer wall of the conical right end of the setting barrel 7 is in fit abutment with the inner wall of the joint hoop, so that the setting barrel 7 can support and limit the inside of the joint hoop, and one end of the pushing barrel 9 is in abutment with one end of the sealing barrel 7.
In setting, the downhole plugging system of fig. 11 (including the setting tool and the joint band) is first brought to a designated setting position within the sleeve 44;
then an uphole force is applied to the adaptor sub 8 while an uphole force is applied to the setting cylinder 7 using the pusher 9. That is, while the lower joint 33 is pulled out of the well, the setting cylinder 7 is pushed by the push cylinder 9 to abut against the inside of the joint hoop, and the joint hoop is pushed in the well. At this time, under the relative acting force of the lower joint 34 and the setting barrel 7 on the joint hoop, the end of the setting barrel 7 far away from the push barrel 9 can also form a supporting force on the inner wall of the joint hoop, the expansion direction of the joint hoop is limited, and the joint hoop can be prevented from being damaged. Namely, the sealing ring 11 and the slips 22 are prevented from being damaged, and the setting safety of the clamping seat can be ensured. At this point the segment moves along the outer wall of the setting barrel 7 deforming the segment until the outer wall of its sealing ring 11 contacts the inner wall of the sleeve 4. The slip teeth 24 of the slip 22 of the joint band are anchored to the inner wall of the casing 4 until the lower sub 33 is disengaged from the release rod 6 and the lower sub 33 is disengaged from the joint band.
And finally, recovering the recyclable expansion cone and the setting tool thereof, completing setting construction, only leaving a joint hoop (shown in figure 12) on the inner wall of the sleeve 4 at the setting position, expanding the slips 22 to be anchored with the inner wall of the sleeve 44, and realizing a double-surface sealing structure by the sealing ring 11 and the sealing ring 1111 thereof and the inner wall of the sleeve 4.
After setting is finished, the plugging function is realized by delivering the plugging body 5 to enter the inner surface of the hoop (as shown in figure 13), and after the sleeve 4 is plugged, the outer surface of the plugging body and the conical sealing plugging surface of the inner surface of the sealing ring form a sealing surface. Because the plugging body is arranged to be a hollow structure, that is, the inside of the plugging body is filled with high-pressure liquid. The sealing surface is a conical sealing plugging surface, and the liquid pressure in the plugging body generates radial pressure and axial pressure on the conical sealing plugging surface. Wherein, radial pressure can ensure to continuously generate pressure with the inner wall of the sleeve on the joint hoop, so that the sealing and anchoring effect of the joint hoop and the inner wall of the sleeve is enhanced.
In a specific embodiment, the circumferential slot 21 may be a slotted hole, and when setting is completed, the plugging function is achieved by delivering the plugging body 4 into the inner surface of the band. After the sleeve 5 is plugged, the well fluid pressure on the left side of the joint hoop in the figure is increased, and the pressure of the sealing ring 1 of the joint hoop is simultaneously transmitted to one end of the slip 2. Because be equipped with the axis vertically circumference slotted hole 21 of several and section hoop in the circumference of the one end of slips 2, the one end of slips 2 receives pressure back, and the distance on two long limits of the circumference slotted hole 21 of bar slotted hole is very close, and two limits can be extruded together, and slips 2 can keep good supporting effect to sealing ring 1, and sealing ring 1 can keep good sealing reliability.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a section hoop, section hoop is the plastic deformation component, its characterized in that be equipped with conical inner channel on section hoop's the axial, including sealing ring and the slips that sets up to a body structure, wherein, the sealing ring radially produces the back surface of warping sealed with the sleeve inner wall, the slips radially open and with sleeve inner wall anchoring, the one end of slips with the sealing ring is connected, be equipped with the several in the circumference of the one end of slips with section hoop's axis vertically circumference slotted hole, be equipped with the several in the circumference of the other end of slips with section hoop's axial direction bar groove.
2. A segment band according to claim 1, wherein said axial grooves communicate with said circumferential groove hole.
3. The segment band of claim 2, wherein the axial grooves extend through an end face of the other end of the slip.
4. The joint hoop of claim 1, wherein the circumferential slot is a polygonal slot, an elliptical slot, a circular slot or a kidney slot.
5. A joint band according to any one of claims 1 to 4, wherein the ratio of the total length of said circumferential slots in the circumferential direction to the circumference of said sealing ring is between 1/2 and 4/5.
6. A joint band according to any one of claims 1 to 4, wherein the circumferential slot is spaced from the sealing ring.
7. A joint hoop according to any one of claims 1 to 4, wherein the joint hoop is a metal member having an elongation of 14% to 50%.
8. A joint band according to claim 7, wherein the metal member is a soluble metal that is soluble in downhole fluids.
9. A joint hoop according to any one of claims 1 to 4, wherein the sealing ring is provided with a sealing ring which forms a face seal with the inner wall of the sleeve in the axial direction.
10. A cartridge comprising a lower sub and a joint hoop as claimed in any one of claims 1 to 9, the lower sub having a through bore communicating with the internal passage, the slips abutting the other end of the lower sub.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010681266.2A CN113944440A (en) | 2020-07-15 | 2020-07-15 | Section hoop and clamping seat |
| US17/083,140 US11261691B2 (en) | 2020-07-15 | 2020-10-28 | Integrated coupling and downhole plugging system and plugging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010681266.2A CN113944440A (en) | 2020-07-15 | 2020-07-15 | Section hoop and clamping seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113944440A true CN113944440A (en) | 2022-01-18 |
Family
ID=80079917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010681266.2A Pending CN113944440A (en) | 2020-07-15 | 2020-07-15 | Section hoop and clamping seat |
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| Country | Link |
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| CN (1) | CN113944440A (en) |
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