CN211201873U - Large-drift-diameter toe end sliding sleeve - Google Patents
Large-drift-diameter toe end sliding sleeve Download PDFInfo
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- CN211201873U CN211201873U CN201921126676.XU CN201921126676U CN211201873U CN 211201873 U CN211201873 U CN 211201873U CN 201921126676 U CN201921126676 U CN 201921126676U CN 211201873 U CN211201873 U CN 211201873U
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- sliding sleeve
- rupture disc
- sleeve body
- toe end
- rupture
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- 238000007789 sealing Methods 0.000 claims description 12
- 210000000664 rectum Anatomy 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 7
- 239000004568 cement Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 238000005422 blasting Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a big latus rectum toe end sliding sleeve includes: the sliding sleeve body, the last port of sliding sleeve body is provided with the top connection, the lower port of sliding sleeve body is provided with the lower clutch, be provided with a plurality of guiding gutters on the lateral wall of sliding sleeve body, still be provided with a plurality of through-holes on the lateral wall of sliding sleeve body, every the inside assembly of through-hole has the inlayer rupture disk, every the outer port of through-hole is equipped with outer rupture disk, the inlayer rupture disk with outer rupture disk is installed by from inside to outside fracturing direction, outer rupture disk's the pressure value of rupture is less than the pressure value of rupture of inlayer rupture disk. The utility model discloses a big latus rectum toe end sliding sleeve need not install the spare part on the inside wall of sliding sleeve body, and simple structure is linked together through-hole and stratum, establishes flow channel, need not carry out the perforation operation.
Description
Technical Field
The utility model belongs to the technical field of oil gas well fracturing, acidizing, concretely relates to big latus rectum toe end sliding sleeve.
Background
After well cementation, a shaft is a closed cavity, and in order to provide a pumping circulation channel for later-stage fracturing transformation, a casing at the toe end of a well completion pipe column and an external cement sheath thereof need to be opened to communicate the shaft with the stratum. For the current wells with the reservoir depth of 3500m and the horizontal section length of 1500m, the purpose of carrying a downhole crawler by using a coiled tubing or a cable is realized by adopting hydraulic or thermal perforating gun for perforating, for the wells with the reservoir depth of 3500m and the horizontal section length of 1500m, the mode has the defects that the crawler is ineffective due to the stress application and the pressing of the coiled tubing due to the flexible characteristic of the coiled tubing, the cleanliness of a well bore is required by the crawler, so that a tool cannot be delivered to the toe end of a tubular column and cannot be reconstructed, the problem becomes a bottleneck problem in the development field of long-horizontal section well cementation horizontal wells at present, in order to solve the technical problem, the establishment of a liquid flow channel at the toe end of the tubular column is actively explored to be combined with casing operation for omitting the perforating operation of the tool, so that the current situation of delivery without technical means is avoided, and meanwhile, the long operation time and low operation efficiency, high construction cost and high risk. In various casing joint tool modes provided by the prior art, a port is opened through the action of mechanisms such as an air cavity, an explosion valve, an electric control element and the like, and the tool is complex, large in length, small in outer diameter, thick in wall thickness, smaller in inner drift diameter than a casing which is put into the casing and needs to be matched with a special well cementing rubber plug due to the existence of the mechanism design, and meanwhile, as electromagnetic components have the characteristic of being easy to lose efficacy when meeting high temperature and humidity, the tool is applied to complex and variable well conditions, the stability is uncontrollable, and no rescue measures are needed after the failure; the blasting type is destructive and dangerous to a certain extent, and particularly, the operation of a gas well has great potential safety hazard.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is an object of the present invention to provide a large-diameter toe sleeve for overcoming the above problems or at least partially solving or alleviating the above problems.
The utility model provides a big latus rectum toe end sliding sleeve, include: the sliding sleeve body, the last port of sliding sleeve body is provided with the top connection, the lower port of sliding sleeve body is provided with the lower clutch, be provided with a plurality of guiding gutters on the lateral wall of sliding sleeve body, still be provided with a plurality of through-holes on the lateral wall of sliding sleeve body, every the inside of through-hole is equipped with the inlayer rupture disc, every the outer port of through-hole is equipped with outer rupture disc, inlayer rupture disc with outer rupture disc is installed by from inside to outside fracturing direction, the burst pressure value of outer rupture disc is less than the burst pressure value of inlayer rupture disc.
The utility model discloses optional characteristic below still having.
Optionally, an enclosed air chamber is formed between the inner rupture disc and the outer rupture disc.
Optionally, a first counter bore and a second counter bore are sequentially arranged in the through hole from outside to inside, the outer-layer rupture disc is fixed in the first counter bore, and the inner-layer rupture disc is fixed in the second counter bore.
Optionally, a sealing gasket is arranged between the outer-layer rupture disc and the inner-layer rupture disc, and a sealing ring is arranged between the inner-layer rupture disc and the side wall of the second counter bore.
Optionally, the outer rupture disc is threadably secured within the first counterbore.
Optionally, the inner-layer rupture disc is an inverted arch-shaped rupture disc, and the convex surface of the inner-layer rupture disc faces the inner side of the sliding sleeve body.
Optionally, a strip-shaped protrusion is formed between every two adjacent flow guide grooves, and the through hole is formed in each strip-shaped protrusion.
The utility model has the advantages that:
the utility model discloses a big latus rectum toe end sliding sleeve sets up inlayer rupture disc and outer rupture disc in every through-hole on the sliding sleeve body, installation spare part on the inside wall of sliding sleeve body need not again, moreover, the steam generator is simple in structure, after sending into predetermined position in the oil well with it on the well completion sleeve pipe, after pouring into cement outside the pit shaft into, again to pouring into high-pressure displacement liquid in the pit shaft into, through high-pressure displacement liquid fracturing inlayer rupture disc in the pit shaft, outer rupture disc and concrete, be linked together through-hole and stratum, establish the liquid flow passageway, need not carry out the perforation operation, and inlayer rupture disc and outer rupture disc stability easy control, the security is high.
Drawings
FIG. 1 is a schematic view of the whole section structure of the large-diameter toe-end sliding sleeve of the present invention;
FIG. 2 is a schematic view of the end structure of FIG. 1;
fig. 3 is an enlarged schematic view of a structure at a in fig. 1.
In the above figures: 1, a sliding sleeve body; 101, connecting a joint; 102 a lower joint; 103, a diversion trench; 104 through holes; 105 strip-shaped bulges; 2 an inner rupture disc; 3 an outer rupture disc; 4 sealing the air chamber.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples:
example 1
Referring to fig. 1 and 3, the large-diameter toe end sliding sleeve of the present invention includes: sliding sleeve body 1, the last port of sliding sleeve body 1 is provided with top connection 101, the lower port of sliding sleeve body 1 is provided with lower clutch 102, be provided with a plurality of guiding gutters 103 on sliding sleeve body 1's the lateral wall, still be provided with a plurality of through-holes 104 on sliding sleeve body 1's the lateral wall, the inside assembly of every through-hole 104 is equipped with inlayer rupture disk 2, the outer port of every through-hole 104 is equipped with outer rupture disk 3, inlayer rupture disk 2 and outer rupture disk 3 are installed by from inside to outside fracturing direction, outer rupture disk 3's the pressure value of rupture is less than inlayer rupture disk 2's the pressure value of rupture, inlayer rupture disk 2's the pressure value of rupture is 90MPa, outer rupture disk 2.
After the horizontal well is drilled, the vertical depth of the gas well reaches 3500m, and an upper joint 101 and a lower joint 102 of a sliding sleeve body 1 of the tool are connected with a well completion casing pipe and are lowered into a designed position in the well. And then introducing cement into the shaft, putting the well cementation rubber plug, finally introducing the displacement fluid, building pressure in the shaft of the oil well by using a pump truck, and when the internal pressure of the shaft exceeds 90MPa, namely the fracture pressure of the inner-layer rupture disk 2, breaking the outer-layer rupture disk 3 and the cement layer after the inner-layer rupture disk 2 is broken so as to communicate the shaft with the stratum without perforating operation.
Example 2
Referring to fig. 1 and 3, on the basis of example 1, a closed air chamber 4 is formed between an inner-layer rupture disk 2 and an outer-layer rupture disk 3.
Example 3
Referring to fig. 3, on the basis of embodiment 2, a first counter bore and a second counter bore are sequentially arranged in the through hole 104 from outside to inside, the outer-layer rupture disc 3 is fixed in the first counter bore, and the inner-layer rupture disc 2 is fixed in the second counter bore.
The outside surface of outer rupture disc 3 is less than the lateral wall of sliding sleeve body 1, can avoid outer rupture disc 3 to be worn and torn, can make and keep a distance between inner rupture disc 2 and the outer rupture disc 3, forms sealed air chamber 4 as the fracturing space.
Example 4
Referring to fig. 3, on the basis of embodiment 3, a sealing gasket is arranged between the outer-layer rupture disk 3 and the inner-layer rupture disk 2, and a sealing ring is arranged between the inner-layer rupture disk 2 and the side wall of the second counter bore.
The inner layer rupture disc 2 can only be ruptured in one direction, and the sealing ring can ensure that the solution in the shaft can not enter the outer side of the inner layer rupture disc 2, so that the inner layer rupture disc 2 can not be ruptured because of pressure balance; a sealing gasket is arranged between the inner-layer rupture disk 2 and the outer-layer rupture disk 3, and the sealing gasket and the sealing ring form double sealing, so that a sealed air cavity 4 is formed between the inner-layer rupture disk 2 and the outer-layer rupture disk 3.
Example 5
Referring to fig. 3, in example 4, an outer-layer rupture disk 3 is screwed into a first counterbore.
The border of outer rupture disc 3 is provided with the external screw thread, is provided with the internal thread on the inside wall of first counter bore, and outer rupture disc 3 matches through the internal thread on the inside wall of external screw thread and first counter bore.
Example 6
In addition to embodiment 1, the inner-layer rupture disk 2 is a reverse arch type rupture disk, and the convex surface of the reverse arch type rupture disk faces the inner side of the sliding sleeve body 1.
The rupture disc mainly has three types, namely a flat plate type, a positive arch type and a reverse arch type. The flat rupture disc has poor comprehensive performance and is mainly used in low-pressure and ultra-low-pressure working conditions. The positive arch rupture disk is easy to burst in advance due to fatigue, and the operating pressure of the positive arch rupture disk cannot exceed 65% of the minimum burst pressure of the rupture disk. The reverse arch rupture disc has excellent fatigue resistance, no fragment produced during blasting, operation pressure up to 90% of the minimum blasting pressure, and high self stability.
Example 7
Referring to fig. 2, on the basis of embodiment 1, one strip-shaped protrusion 105 is formed between every two adjacent flow guide grooves 103, and the through hole 104 is disposed on each strip-shaped protrusion 105.
Four protruding 105 evenly distributed of bar have the effect of rightting on the lateral wall of sliding sleeve body 1, have a guiding gutter 103 between every two protruding 105 of bar, annular space overflow area when four guiding gutter 103 multiplicable cementing sets up two through-holes 104 on every protruding 105 of bar respectively, protruding 105 of bar can make the length increase of through-hole 104, provides the mounted position for inlayer rupture disc 2 and outside rupture disc 3.
In the specific implementation process, the sliding sleeve body 1 of the large-diameter toe end sliding sleeve is connected to a shaft casing through the upper connector 101 and the lower connector 102, cement is injected in a forward direction for a period of time along with the shaft casing descending to a preset position in a well with the reservoir depth exceeding 3500m and the horizontal section length exceeding 1500m, a well cementation rubber plug is put in, a follow-up displacement fluid is usually clear water or KC L and the density is not more than 1.1%, the cement returns from the inner annular space, when the in-pipe displacement fluid pushes the rubber plug to a collision pressure short circuit position, pressurization is carried out from a well mouth, the shaft is suppressed to 90MPa, the inner-layer rupture disc 2 and the outer-layer rupture disc 3 are sequentially ruptured, the shaft casing establishes a fluid flow channel with a stratum through the through hole 104 in the sliding sleeve body 1, the later-stage pumping acid displacement fluid is filled in the large-diameter toe end sliding sleeve tool, the residual structure of the inner-layer rupture disc 2 and the residual structure of the outer-layer rupture disc 3 of the acid displacement fluid are dissolved, the fluid is completely communicated, the fluid flow channel formed by the through hole 104, the overflow channel is maximized, the subsequent pumping tool.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.
Claims (7)
1. A large-bore toe end sliding sleeve, comprising: sliding sleeve body (1), the last port of sliding sleeve body (1) is provided with top connection (101), the lower port of sliding sleeve body (1) is provided with lower clutch (102), be provided with a plurality of guiding gutters (103) on the lateral wall of sliding sleeve body (1), still be provided with a plurality of through-holes (104) on the lateral wall of sliding sleeve body (1), every the inside of through-hole (104) is equipped with inlayer rupture disc (2), every the outer port of through-hole (104) is equipped with outer rupture disc (3), inlayer rupture disc (2) with outer rupture disc (3) are installed by from inside to outside fracturing direction, the rupture pressure value of outer rupture disc (3) is far less than the rupture pressure value of inlayer rupture disc (2).
2. The large-diameter toe end sliding sleeve according to claim 1, wherein a closed air cavity (4) is formed between the inner-layer rupture disc (2) and the outer-layer rupture disc (3).
3. The large-diameter toe end sliding sleeve according to claim 2, wherein a first counter bore and a second counter bore are sequentially arranged in the through hole (104) from outside to inside, the outer layer rupture disc (3) is fixed in the first counter bore, and the inner layer rupture disc (2) is fixed in the second counter bore.
4. The large-diameter toe end sliding sleeve according to claim 3, wherein a sealing gasket is arranged between the outer-layer rupture disc (3) and the inner-layer rupture disc (2), and a sealing ring is arranged between the inner-layer rupture disc (2) and the side wall of the second counter bore.
5. The large-diameter toe end sliding sleeve according to claim 4, wherein the outer layer rupture disc (3) is fixed in the first counter bore by screw threads.
6. The large-diameter toe end sliding sleeve according to claim 1, wherein the inner layer rupture disc (2) is a reverse arch type rupture disc, and the convex surface of the rupture disc faces the inner side of the sliding sleeve body (1).
7. The large-diameter toe end sliding sleeve according to claim 1, wherein a strip-shaped protrusion (105) is formed between every two adjacent guide grooves (103), and the through hole (104) is formed on each strip-shaped protrusion (105).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921126676.XU CN211201873U (en) | 2019-07-18 | 2019-07-18 | Large-drift-diameter toe end sliding sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921126676.XU CN211201873U (en) | 2019-07-18 | 2019-07-18 | Large-drift-diameter toe end sliding sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211201873U true CN211201873U (en) | 2020-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921126676.XU Active CN211201873U (en) | 2019-07-18 | 2019-07-18 | Large-drift-diameter toe end sliding sleeve |
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| Country | Link |
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| CN (1) | CN211201873U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374552A (en) * | 2019-07-18 | 2019-10-25 | 中国石油天然气股份有限公司 | Large-drift-diameter toe end sliding sleeve and method for establishing channel between shaft casing and stratum |
-
2019
- 2019-07-18 CN CN201921126676.XU patent/CN211201873U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374552A (en) * | 2019-07-18 | 2019-10-25 | 中国石油天然气股份有限公司 | Large-drift-diameter toe end sliding sleeve and method for establishing channel between shaft casing and stratum |
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