CN214464059U - Well cementation tool for enhancing shearing performance of casing pipe at stratum slippage section - Google Patents
Well cementation tool for enhancing shearing performance of casing pipe at stratum slippage section Download PDFInfo
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- CN214464059U CN214464059U CN202120528371.2U CN202120528371U CN214464059U CN 214464059 U CN214464059 U CN 214464059U CN 202120528371 U CN202120528371 U CN 202120528371U CN 214464059 U CN214464059 U CN 214464059U
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Abstract
The utility model discloses a well cementation instrument of reinforcing stratum section sleeve pipe shear property that slides, including installing the high steel level sleeve pipe in stratum fault pit shaft, the sleeve pipe is located and is filled flexible cement sheath or conventional cement sheath between outer wall in the pit shaft and stratum, it has conventional cement sheath to fill between outer wall and stratum about the sleeve pipe. An expansion pipe is arranged between the cement sheath positioned between the shafts and the stratum, and a corrugated pipe is arranged between the casing and the cement sheath. The well cementation tool solves or reduces the problem of casing deformation by 4 technical means such as an integrated expansion pipe, a flexible cement sheath, a corrugated pipe and a high-steel-grade casing; the 4 technical means have the effect of slowing down the deformation of the sleeve, so that the method is more effective compared with the existing method; in addition, 4 technical means are not all used when being applied, can be increased or decreased according to the actual situation on site, can be 3 technical combinations, 2 technical combinations or only 1 technical combination, and have strong flexibility.
Description
Technical Field
The utility model relates to an oil, gas drilling field especially relates to a well cementation instrument of reinforcing stratum slippage section sleeve pipe shearing performance.
Background
In oil and gas resource exploitation, particularly in shale gas exploitation technology, a horizontal well and a hydraulic fracturing technology are generally required to achieve the purpose of increasing production. However, in the Sichuan Changning block, the casing deformation is found in more than 30% of horizontal wells in the hydraulic fracturing process, so that the subsequent operation of tools cannot be completed through the casing, and the high-efficiency exploitation of shale gas is seriously influenced and restricted.
The primary cause of casing deformation is due to the fracture slip of natural fractures in the formation induced by hydraulic fracturing. Even if the cause of casing deformation is known, the current prior art cannot prevent or avoid the slip of the fault, so the deformation of the casing can be only relieved by improving the deformation resistance of the casing or absorbing deformation energy by the annular space.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model aims at providing a well cementation instrument of reinforcing stratum section sleeve pipe shear performance that slides to solve the problem of the too big shear deformation of sleeve pipe that causes because of the stratum slides.
In order to realize the above purpose, the utility model discloses a technical scheme:
a well cementation tool for enhancing shearing performance of a casing of a stratum slippage section comprises a high steel grade casing arranged in a stratum fault shaft, wherein a flexible cement sheath or a conventional cement sheath is filled between the outer wall of the casing positioned in the shaft and the stratum, and the conventional cement sheath is filled between the upper outer wall and the lower outer wall of the casing and the stratum. The deformation of the casing is slowed down by arranging the casing and/or the flexible cement sheath; wherein, the casing pipe is a high-grade steel casing pipe with a grade above 125ksi steel; the flexible cement sheath is a cement sheath containing hollow glass balls and having strong compressibility.
Furthermore, an expansion pipe is arranged between the cement sheath positioned between the wellbores and the stratum, and the deformation of the casing is slowed down by arranging the expansion pipe. The expansion pipe is made of materials with strong shearing resistance and higher toughness, such as 42CrMo steel and the like.
Preferably, both ends are provided with annular knot and lower annular knot respectively about being located the sleeve pipe outer wall in the pit shaft, go up annular knot and install the bellows with annular knot down between, the bellows is located between sleeve pipe and the cement sheath, through setting up the bellows in order to slow down the sleeve pipe and warp.
Based on above-mentioned well cementation instrument, the utility model also provides a well cementation method of reinforcing stratum slippage section sleeve pipe shear property, well cementation method adopts at least one component in expansion pipe, flexible cement ring, bellows and the sleeve pipe, including following step:
determining the position of the fracture in the stratum by using the microseism signal;
carrying out reaming operation on the fault well barrel section by the lower reamer to obtain a reamed well barrel;
a well cementation casing is put into a fault;
and injecting slurry to the outer side of the casing for well cementation.
The utility model discloses in, the effect that adopts the expansion pipe component is the resistance to deformation ability that improves the pit shaft, and the effect that adopts flexible cement ring and bellows is the compressibility that improves the pit shaft annular space, warp to the sleeve pipe and plays cushioning effect, adopts high steel level sheathed tube effect to improve sleeve pipe resistance to deformation ability. The 4 components have the effect of slowing down the deformation of the sleeve, so that the method is more effective compared with the existing method. The technical means adopted by the 4 components are not all used in the application, can be increased or decreased according to the actual situation on site, and can be a combination of 3 technologies, a combination of 2 technologies or only 1 technology. Therefore, the utility model discloses the method has stronger flexibility.
Furthermore, after the shaft is reamed, an expansion pipe is directionally lowered into the section of the reaming shaft and expanded, then a well cementation casing is lowered into the fault, and the deformation of the casing is slowed down by arranging the expansion pipe.
Furthermore, in the step of running the well cementation casing into the fault, the outer wall of the casing is provided with a corrugated pipe, and the deformation of the casing is slowed down by the corrugated pipe.
Furthermore, in the process of injecting mud to the outer side of the casing pipe for well cementation, the mud at the fault position of the outer side of the casing pipe is a flexible cement sheath or a conventional cement sheath, the mud at the upper end and the lower end of the outer side of the casing pipe is the conventional cement sheath, the flexible cement sheath is a compressible cement sheath containing hollow glass balls, and the deformation of the casing pipe is slowed down by the arrangement of the flexible cement sheath.
Further, when the stratum does not slip or the slip amount is less than 10mm, the well cementation method adopts a high steel grade casing pipe to fix the well; preferably, the high-grade steel casing is a casing of grade above 125ksi steel.
Further, when the stratum slippage is 10 mm-20 mm, the well cementation method adopts two combination modes of a high steel grade casing pipe and any one of a corrugated pipe, a flexible cement sheath and an expansion pipe to well.
Further, when the stratum slippage is 20 mm-40 mm, the well cementation method adopts three combination modes of any two of a high steel grade casing pipe, a corrugated pipe, a flexible cement sheath and an expansion pipe to well.
Further, when the stratum slippage exceeds more than 40mm, the well cementation method adopts four combination modes of a high steel grade casing pipe, an expansion pipe, a flexible cement sheath and a corrugated pipe to well cementation.
The utility model discloses in, along with the stratum slippage progressively increases, the sleeve pipe deflection also can progressively increase, consequently has increased the component that slows down the sleeve pipe deformation gradually, solves or reduces the problem that the sleeve pipe warp.
The utility model has the advantages that:
the utility model provides a well cementing tool, which solves or reduces the deformation problem of the casing by 4 technical means such as collecting an expansion pipe, a flexible cement sheath, a corrugated pipe and a high steel grade casing; the 4 technical means have the effect of slowing down the deformation of the sleeve, so that the method is more effective compared with the existing method; in addition, 4 kinds of technical means are not all used when using, can increase and decrease according to on-the-spot actual conditions, can be 3 kinds of technical combination, or 2 kinds of technical combination, also perhaps only use 1 kind of technique, consequently, the utility model discloses the method has stronger flexibility.
Drawings
FIG. 1 is a full cross-sectional view of one embodiment of the present invention using 1 high grade steel casing;
FIG. 2 is a cross-sectional view of the formation after reaming the fractured segments of the present invention;
FIG. 3 is a full cross-sectional view of 2 embodiments of the present invention using bellows and high grade steel casing;
FIG. 4 is a full cross-sectional view of 2 embodiments of the present invention using a flexible cement sheath and a high steel grade casing;
FIG. 5 is a full cross-sectional view of 2 embodiments of the present invention using an expansion tube and a high steel grade casing;
FIG. 6 is a full cross-sectional view of 3 embodiments of the present invention using bellows, flexible cement sheath and high steel grade casing;
FIG. 7 is a full cross-sectional view of 3 embodiments of the present invention using bellows, expansion tubes and high grade steel casing;
FIG. 8 is a full cross-sectional view of 3 embodiments of the present invention using a flexible cement sheath, an expansion tube, and a high steel grade casing;
FIG. 9 is a full cross-sectional view of an embodiment of the present invention using 4 techniques for expansion pipe, flexible cement sheath, corrugated pipe, and high-grade steel casing;
in the figure, 1, the stratum; 2. fault breaking; 3. a reamed wellbore; 4. a sleeve; 5. a conventional cement sheath; 6. an annular buckle is arranged; 7. an expansion tube; 8. a flexible cement sheath; 9. a bellows; 10. and a lower annular buckle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further explained with reference to the accompanying drawings. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
A well cementation tool for enhancing the shearing performance of a casing of a stratum slip section is suitable for the working condition that the stratum does not slip or the slip amount is less than 10mm, and the use method of the well cementation tool comprises the following steps as shown in figure 1:
s1, determining the position of the fracture 2 in the stratum 1 by using the microseism signals;
s2, carrying out reaming operation on the fault 2 well barrel section by the lower reamer to obtain a reamed well shaft 3;
s3, setting the high steel level cementing casing 4 downwards to the fault;
and S4, injecting mud outside the casing 4 for well cementation, wherein the cement sheath in the shaft is a conventional cement sheath 5.
This example utilizes 1 technique for high steel grade casing.
Example 2
A well cementing tool for enhancing the shearing performance of a casing of a stratum slip section is suitable for the working condition that the stratum slip amount is 10 mm-20 mm, and the use method of the well cementing tool comprises the following steps as shown in figure 3:
s1, determining the position of the fracture 2 in the stratum 1 by using the microseism signals;
s2, carrying out reaming operation on the fault 2 well barrel section by the lower reamer to obtain a reamed well shaft 3;
s3, setting a high steel-grade well cementation casing 4 downwards into a fault, installing a corrugated pipe 9 outside the casing 4, and fixing the corrugated pipe 9 through an upper annular buckle 6 and a lower annular buckle 10 which are matched with grooves at the upper end and the lower end of the casing 4;
and S4, injecting mud outside the casing 4 for well cementation, wherein the cement sheath in the shaft is a conventional cement sheath 5.
This embodiment utilizes 2 techniques of bellows and high steel grade casing.
Example 3
A well cementing tool for enhancing the shearing performance of a casing of a stratum slip section is suitable for the working condition that the stratum slip amount is 10 mm-20 mm, and the use method of the well cementing tool comprises the following steps as shown in figure 4:
s1, determining the position of the fracture 2 in the stratum 1 by using the microseism signals;
s2, carrying out reaming operation on the fault 2 well barrel section by the lower reamer to obtain a reamed well shaft 3;
s3, setting the high steel level cementing casing 4 downwards to the fault;
and S4, injecting mud outside the casing 4 to perform well cementation, wherein the cement sheath at the fault 2 is a flexible cement sheath 8, and the rest part of the cement sheath is a conventional cement sheath 5.
This embodiment utilizes 2 techniques of a flexible cement sheath and a high steel grade casing.
Example 4
A well cementing tool for enhancing the shearing performance of a casing of a stratum slip section is suitable for the working condition that the stratum slip amount is 10 mm-20 mm, and the use method of the well cementing tool comprises the following steps as shown in figure 5:
s1, determining the position of the fracture 2 in the stratum 1 by using the microseism signals;
s2, carrying out reaming operation on the fault 2 well barrel section by the lower reamer to obtain a reamed well shaft 3;
s3, directionally setting the expansion pipe 7 in the reaming well barrel section and expanding, wherein the expansion pipe 7 is made of materials with strong shearing resistance and high toughness, such as 42CrMo steel;
s4, setting the high steel level cementing casing 4 downwards to the fault;
and S5, injecting mud outside the casing 4 for well cementation, wherein the cement sheath in the shaft is a conventional cement sheath 5.
This embodiment utilizes 2 techniques of expansion pipe and high steel grade casing.
Example 5
A well cementing tool for enhancing the shearing performance of a casing of a stratum slip section is suitable for the working condition that the stratum slip amount is between 20mm and 40mm, and the use method of the well cementing tool comprises the following steps as shown in figure 6:
s1, determining the position of the fracture 2 in the stratum 1 by using the microseism signals;
s2, carrying out reaming operation on the fault 2 well barrel section by the lower reamer to obtain a reamed well shaft 3;
s3, inserting the high-grade steel casing 4 into the fault, installing a corrugated pipe 9 on the outer side of the casing 4, and fixing the corrugated pipe 9 through an upper annular buckle 6 and a lower annular buckle 10 which are matched with grooves at the upper end and the lower end of the casing 4;
and S4, injecting mud outside the casing 4 to perform well cementation, wherein the cement sheath at the fault 2 is a flexible cement sheath 8, and the rest part of the cement sheath is a conventional cement sheath 5.
This embodiment utilizes 3 technologies of bellows, flexible cement sheath and high steel grade casing.
Example 6
A well cementing tool for enhancing the shearing performance of a casing of a stratum slip section is suitable for the working condition that the stratum slip amount is between 20mm and 40mm, and the use method of the well cementing tool comprises the following steps as shown in figure 7:
s1, determining the position of the fracture 2 in the stratum 1 by using the microseism signals;
s2, carrying out reaming operation on the fault 2 well barrel section by the lower reamer to obtain a reamed well shaft 3;
s3, directionally setting the expansion pipe 7 in the reaming well barrel section and expanding, wherein the expansion pipe 7 is made of materials with strong shearing resistance and high toughness, such as 42CrMo steel;
s4, inserting the high-grade steel casing 4 into the fault, installing a corrugated pipe 9 on the outer side of the casing 4, and fixing the corrugated pipe 9 through an upper annular buckle 6 and a lower annular buckle 10 which are matched with grooves at the upper end and the lower end of the casing 4;
and S4, injecting mud outside the casing 4 for well cementation, wherein the cement sheath in the shaft is a conventional cement sheath 5.
This embodiment utilizes 3 technologies of corrugated tubing, expanded tubing and high grade steel casing.
Example 7
A well cementing tool for enhancing the shearing performance of a casing of a stratum slip section is suitable for the working condition that the stratum slip amount is between 20mm and 40mm, and the use method of the well cementing tool comprises the following steps as shown in figure 8:
s1, determining the position of the fracture 2 in the stratum 1 by using the microseism signals;
s2, carrying out reaming operation on the fault 2 well barrel section by the lower reamer to obtain a reamed well shaft 3;
s3, directionally setting the expansion pipe 7 in the reaming well barrel section and expanding, wherein the expansion pipe 7 is made of materials with strong shearing resistance and high toughness, such as 42CrMo steel;
s4, descending a high-steel-grade casing 4 into the fault;
and S5, injecting mud outside the casing 4 to perform well cementation, wherein the cement sheath at the fault 2 is a flexible cement sheath 8, and the rest part of the cement sheath is a conventional cement sheath 5.
This embodiment utilizes 3 technologies of flexible cement sheath, expansion pipe and high steel grade casing.
Example 8
A well cementation tool for enhancing the shearing performance of a casing of a stratum slip section is suitable for the working condition that the stratum slip amount exceeds more than 40mm, and the use method of the well cementation tool comprises the following steps as shown in figure 9:
s1, determining the position of the fracture 2 in the stratum 1 by using the microseism signals;
s2, carrying out reaming operation on the fault 2 well barrel section by the lower reamer to obtain a reamed well shaft 3;
s3, directionally setting the expansion pipe 7 in the reaming well barrel section and expanding, wherein the expansion pipe 7 is made of materials with strong shearing resistance and high toughness, such as 42CrMo steel;
s4, inserting the high-grade steel casing 4 into the fault, installing a corrugated pipe 9 on the outer side of the casing 4, and fixing the corrugated pipe 9 through an upper annular buckle 6 and a lower annular buckle 10 which are matched with grooves at the upper end and the lower end of the casing 4;
and S5, injecting mud outside the casing 4 to perform well cementation, wherein the cement sheath at the fault 2 is a flexible cement sheath 8, and the rest part of the cement sheath is a conventional cement sheath 5.
After the operation is completed, the result shown in fig. 9 is obtained, and the embodiment works together by utilizing 4 technologies such as an expansion pipe, a flexible cement sheath, a corrugated pipe and a high-steel-grade casing pipe so as to solve the problem that the casing pipe is deformed due to stratum slippage.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The well cementation tool for enhancing the shearing performance of the casing at the stratum slippage section is characterized by comprising a high steel grade casing arranged in a stratum fault shaft, wherein a flexible cement sheath or a conventional cement sheath is filled between the outer wall of the casing in the shaft and the stratum, and a conventional cement sheath is filled between the upper outer wall and the lower outer wall of the casing and the stratum.
2. The cementing tool of claim 1, wherein an expansion tube is disposed between the cement sheath located between the wellbore and the subterranean formation.
3. The well cementing tool of claim 1, wherein the outer wall of the casing in the wellbore is provided at upper and lower ends thereof with an upper and a lower annular button, respectively, and a bellows is installed between the upper and lower annular buttons and between the casing and the cement sheath.
4. The cementing tool of claim 1, wherein the casing is a high grade steel casing above a grade of 125ksi steel.
5. The cementing tool of claim 1, wherein the flexible cement sheath is a compressible cement sheath comprising hollow glass spheres.
6. The cementing tool of claim 2, wherein the material of the expansion pipe is 42CrMo steel.
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| CN202120528371.2U CN214464059U (en) | 2021-03-15 | 2021-03-15 | Well cementation tool for enhancing shearing performance of casing pipe at stratum slippage section |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135243A (en) * | 2021-11-30 | 2022-03-04 | 西南石油大学 | Equal-well-diameter expansion pipe anti-failure composite expansion tool |
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2021
- 2021-03-15 CN CN202120528371.2U patent/CN214464059U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135243A (en) * | 2021-11-30 | 2022-03-04 | 西南石油大学 | Equal-well-diameter expansion pipe anti-failure composite expansion tool |
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