CN112253037A - Well cementation isolating device - Google Patents
Well cementation isolating device Download PDFInfo
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- CN112253037A CN112253037A CN202011004359.8A CN202011004359A CN112253037A CN 112253037 A CN112253037 A CN 112253037A CN 202011004359 A CN202011004359 A CN 202011004359A CN 112253037 A CN112253037 A CN 112253037A
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- packing
- plug body
- installation cylinder
- packing plug
- joint
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- 238000012856 packing Methods 0.000 claims abstract description 152
- 238000009434 installation Methods 0.000 claims abstract description 53
- 238000002955 isolation Methods 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 238000009413 insulation Methods 0.000 claims 4
- 239000011324 bead Substances 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 44
- 239000012634 fragment Substances 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 16
- 239000003129 oil well Substances 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 13
- 238000010276 construction Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 241001391944 Commicarpus scandens Species 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006355 external stress Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B33/1204—Packers; Plugs permanent; drillable
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/14—Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes
- E21B33/16—Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes using plugs for isolating cement charge; Plugs therefor
Abstract
The utility model provides a well cementation isolating device belongs to oil development technical field, and this well cementation isolating device includes: the mounting cylinder body is provided with an upper connecting end and a lower connecting end which are opposite; and the packing plug body is positioned in the installation cylinder body, the outer wall surface of the packing plug body is in sealing connection with the inner wall surface of the installation cylinder body, and the end surface of the packing plug body, which is close to the lower connecting end, is a concave surface. The well cementing isolation device can prevent a packing plug body from being broken to generate large fragments to block a shaft in the drilling process of the well cementing plug device, efficiently complete the drilling and removing operation of the well cementing isolation device, and quickly realize the production of an oil well.
Description
Technical Field
The disclosure relates to the technical field of oil exploitation, in particular to a well cementation isolating device.
Background
In the selective cementing process of an oil well, a half-way cementing process, i.e., a process of cementing at the upper section and cementing at the lower section, is often adopted. When a half-way cementing process is carried out, a cementing isolation device is required to be installed inside the pipe column to separate the upper section part and the lower section part of the pipe column, wherein the cementing isolation device is used for establishing a closed space together with the upper section part of the pipe column so as to bear the pressure of liquid. After the well cementation construction is finished, the well cementation isolating device needs to be drilled out of the pipe column, so that the pipe column is recovered to be smooth in the pipe. The efficiency of drilling out the well cementation isolation device influences the subsequent production of an oil well, so that the well cementation isolation device which is quickly and efficiently drilled out is very important.
The related art provides a well cementation isolating device which comprises an upper joint, a blind plate and a lower joint, wherein the upper joint is in threaded connection with the lower joint, and the blind plate is arranged between the end part of the upper joint and the spigot of the lower joint. The upper joint and the lower joint are respectively used for being connected with the end part of the tubular column in the well, so that the tubular column can be separated into an upper section part and a lower section part through the blind plate.
However, in the related art, the blind plate of the well cementation isolation device is of a cylindrical structure, and when the drilling plug device drills to a position close to the bottom end of the blind plate in the process of drilling and removing the blind plate after the well cementation is finished, the blind plate is broken and generates fragments with a large volume, and the fragments with the large volume are easily blocked in a pipe column in the process of dropping to the bottom of the well, so that a shaft is blocked, and the subsequent production of an oil well is influenced.
Disclosure of Invention
The embodiment of the disclosure provides a well cementation isolating device, which can prevent a packing plug body from being broken to generate large fragments to block a shaft in the drilling process of a drilling plug device, efficiently complete the drilling and removing operation of the well cementation isolating device and quickly realize the production of an oil well. The technical scheme is as follows:
the embodiment of the present disclosure provides a well cementation isolating device, which includes: the mounting cylinder body is provided with an upper connecting end and a lower connecting end which are opposite; and the packing plug body is positioned in the installation cylinder body, the outer wall surface of the packing plug body is in sealing connection with the inner wall surface of the installation cylinder body, and the end surface of the packing plug body, which is close to the lower connecting end, is a concave surface.
In one implementation of the disclosed embodiment, the concave surface is a spherical crown surface.
In another implementation of the disclosed embodiment, the concave surface is a conical surface.
In another implementation of the disclosed embodiment, the diameter of an orthographic projection of the concave surface on a plane perpendicular to the axis of the packing plug body is no less than one-half of the diameter of the packing plug body.
In another implementation manner of the embodiment of the present disclosure, the outer side wall of the packing stopper body has a plurality of strip-shaped limiting protrusions, the plurality of strip-shaped limiting protrusions are distributed at intervals along the circumferential direction of the packing stopper body, the strip-shaped limiting protrusions are distributed at intervals along the axial direction of the packing stopper body, the inner wall surface of the installation cylinder body has a plurality of limiting grooves, the plurality of limiting grooves are distributed at intervals along the circumferential direction of the installation cylinder body, the limiting grooves are distributed along the axial direction of the installation cylinder body, and the strip-shaped limiting protrusions are located in the limiting grooves.
In another implementation manner of the embodiment of the present disclosure, a plane where two opposite side walls of the strip-shaped limiting protrusion are located coincides with an axis of the packing stopper body.
In another implementation manner of the embodiment of the present disclosure, an end surface of the packing plug body, which is close to the upper connection end, has an anti-slip structure.
In another implementation of the disclosed embodiment, the anti-slip structure includes at least one of anti-slip grooves and anti-slip protrusions.
In another implementation manner of the embodiment of the present disclosure, the mounting cylinder includes an upper joint and a lower joint, a lower end of the upper joint is detachably connected to an upper end of the lower joint, a lower end of the upper joint is sleeved outside an upper end of the lower joint, an inner flange is provided on an inner wall surface of the upper joint, and at least a partial region of the packing plug body is located between the inner flange and the upper end of the lower joint in an axial direction of the mounting cylinder; or the lower end of the upper joint is inserted into the upper end of the lower joint, the inner wall surface of the lower joint is provided with an inner flange, and at least part of the area of the packing plug body is positioned between the inner flange and the lower end of the upper joint in the axial direction of the mounting cylinder.
In another implementation manner of the embodiment of the present disclosure, a seal ring is disposed between an outer wall surface of the packing plug body and an inner wall surface of the mounting cylinder.
The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:
the well cementation isolating device provided by the embodiment of the disclosure comprises an installation cylinder body and a packing plug body, wherein the installation cylinder body is provided with an upper connecting end and a lower connecting end, and the upper connecting end and the lower connecting end are used for being connected with a tubular column so as to install the installation cylinder body in the tubular column of a shaft. And a packing plug body is also arranged in the installation cylinder body, the outer wall surface of the packing plug body is hermetically connected with the inner wall surface of the installation cylinder body, namely, the packing plug body can separate the upper space and the lower space of the installation cylinder body, and further separate the pipe column provided with the installation cylinder body into an upper section part and a lower section part which are mutually sealed, so that half-way well cementation can be realized through pressure bearing of the packing plug body. When the well cementation is finished and the well cementation isolating device is drilled, the packer plug body is drilled through a downward drilling plug device in the well, the end face, close to the lower connecting end, of the packer plug body is a concave face, when the drilling plug device drills to the position close to the concave face, even if the lower half portion of the packer plug body is broken due to external stress (the non-drilling plug device is drilled and crushed), the partial area of the bottom end of the packer plug body is inwards sunken, compared with a cylindrical blind plate in the related technology, the size of the lower half portion of the packer plug body is reduced, large fragments are not easily formed after the lower half portion of the packer plug body is broken, well shaft blockage caused by overlarge fragments in the well drilling process is effectively avoided, drilling and removing operations of the well cementation isolating device can be efficiently finished, and the production of the oil well is rapidly realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a cementing isolation device provided by an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a packing plug body according to an embodiment of the disclosure;
FIG. 3 is a schematic structural diagram of a packing plug body according to an embodiment of the disclosure;
FIG. 4 is a cross-sectional view of a packing plug body assembled with a mounting cartridge provided by the present disclosure;
fig. 5 is a schematic view of a drill bit structure of a drilling device provided by an embodiment of the disclosure;
FIG. 6 is a schematic view of a first construction state of a cementing isolation device provided by the embodiment of the present disclosure;
FIG. 7 is a schematic view of a second construction state of the cementing isolation device provided by the embodiment of the disclosure.
The respective symbols in the drawings are explained as follows:
1-mounting a cylinder body, 11-an upper connecting end, 12-a lower connecting end and 13-a limiting groove;
2-packing the plug body, 20-concave surface, 21-strip-shaped limit bulge, 210-side wall, 22-anti-skid bulge and 23-anti-skid groove;
31-upper joint, 32-lower joint, 33-inner flange;
41-sealing ring, 42-drill bit.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," "third," and similar terms in the description and claims of the present disclosure are not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", "top", "bottom", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes.
Fig. 1 is a schematic structural diagram of a cementing isolation device provided in an embodiment of the present disclosure. As shown in fig. 1, the cementing isolation device comprises: the cylinder body 1 and the packing plug body 2 are installed.
Wherein the mounting cylinder 1 has opposite upper and lower connection ends 11, 12.
The packing plug body 2 is positioned in the installation cylinder body 1, the outer wall surface of the packing plug body is connected with the inner wall surface of the installation cylinder body 1 in a sealing mode, and the end face, close to the lower connecting end 12, of the packing plug body 2 is a concave surface 20.
The well cementation isolation device provided by the embodiment of the disclosure comprises an installation cylinder body 1 and a packing plug body 2, wherein the installation cylinder body 1 is provided with an upper connecting end 11 and a lower connecting end 12, and the upper connecting end 11 and the lower connecting end 12 are used for being connected with a pipe column so as to install the installation cylinder body 1 in the pipe column of a shaft. And, still be provided with packing cock body 2 in the installation barrel 1, the sealed wall of this packing cock body 2 and the internal wall face sealing connection of installation barrel 1, packing cock body 2 can be with the upper portion space and the lower part space separation of installation barrel 1 promptly, and then also will install the tubular column of barrel 1 and separate into mutual inclosed upper segment part and hypomere part to realize half a journey well cementation through packing cock body 2 pressure-bearing.
When the well cementation is finished and the well cementation isolating device is drilled, the packer plug body 2 is drilled through a downward drilling plug device in the well, the end face, close to the lower connecting end 12, of the packer plug body 2 is a concave face 20, when the drilling plug device drills to the position close to the concave face 20, even if the lower half portion of the packer plug body 2 is broken due to external stress (the non-drilling plug device is broken), as the partial area of the bottom end of the packer plug body 2 is inwards sunken, compared with a cylindrical blind plate in the related technology, the size of the lower half portion is reduced by the packer plug body 2, large fragments cannot be easily formed after the lower half portion of the packer plug body 2 is broken, accordingly, shaft blockage caused by overlarge fragments in the well cementation process is effectively avoided, drilling operation of the well cementation isolating device can be efficiently completed, and production of the oil well is rapidly achieved.
In the embodiment of the disclosure, the packing plug body 2 can be a structural member made of an aluminum alloy material, the packing plug body 2 made of the aluminum alloy is convenient to drill, the efficiency of drilling operation can be improved, and the production of an oil well can be rapidly realized.
Alternatively, as shown in fig. 1, the diameter of the orthographic projection of the concave surface 20 on a plane perpendicular to the axis of the packing plug 2 is not less than one-half of the diameter of the packing plug 2.
Wherein, packing the cock body 2 is the cylindric structure of installing in installation barrel 1, therefore packing the cock body 2 and having two opposite terminal surfaces, the terminal surface that packs the bottom of cock body 2 is for packing the cock body 2 and be close to the terminal surface of lower link 12, the terminal surface that packs the top of cock body 2 is for packing the end surface that the cock body 2 is close to upper link 11. Set up concave surface 20 through the bottom at packing cock body 2, when packing cock body 2's the latter half because of external force breaks, owing to packing cock body 2 has reduced the volume of packing cock body 2's the latter half through concave surface 20 for also be difficult to form the great fragment of volume after packing cock body 2's the latter half is broken, thereby effectively avoid boring the fragment that stopper in-process produced to cause the pit shaft to block up because of the bulk is too big.
In addition, the orthographic projection of the concave surface 20 at the bottom end of the packing plug body 2 on the plane perpendicular to the axis of the packing plug body 2 is not smaller than one half of the diameter of the packing plug body 2, namely, the maximum diameter of the radial cross section of the concave surface 20 is not smaller than one half of the diameter of the packing plug body 2, so that the concave surface 20 can occupy most of the area on the bottom end of the packing plug body 2, the volume of the lower half of the packing plug body 2 is reduced to a greater extent, the lower half of the packing plug body 2 is not easy to form fragments with larger volume after being crushed, and the blockage of a shaft due to the fact that the fragments generated in the drilling and plugging process are too large is effectively avoided.
Illustratively, as shown in FIG. 1, the concave surface 20 may be a curved surface. Because the bottom of packing cock body 2 has the cambered surface of indent, even make the bottom part region of packing cock body 2 be the arc, because any regional atress on the arc structure, can both disperse the power to all around evenly, pack cock body 2 when the pressure-bearing promptly, can disperse the loading force that receives to the installation barrel 1 department that is located packing cock body 2 periphery through concave surface 20, thereby improve the pressure-bearing capacity of packing cock body 2, make packing cock body 2 be difficult to the easy breakage when the well cementation operation, improve the reliability.
Wherein, when the concave surface 20 is an arc surface, because the sizes of different radial cross sections of the concave surface 20 in the axial direction are different, and the concave surface 20 is recessed towards the upper connecting end 11 of the mounting cylinder 1, that is, the concave surface 20 is concave, the position where the radial cross section of the concave surface 20 is the largest is the opening position of the concave surface 20, that is, the position where the concave surface 20 is connected with the packing plug body 2. Therefore, when the concave surface 20 is an arc surface, it is necessary to ensure that the diameter of the opening of the concave surface 20 is not less than one half of the diameter of the packing plug body 2, so as to achieve the purpose of reducing the volume of the lower half of the packing plug body 2 to a greater extent and ensuring that fragments with larger volume are not easily formed after the lower half of the packing plug body 2 is crushed.
Alternatively, the end surface of the packing stopper body 2 near the lower connection end 12 may have a plurality of concave surfaces 20 arranged at intervals.
Through setting up a plurality of concave surfaces 20 and comparing in the volume of single concave surface 20 ability bigger degree reduction packing cock body 2's the latter half, be difficult to form the great fragment of volume after guaranteeing packing cock body 2's the latter half breakage to effectively avoid boring the fragment that stopper in-process produced to cause the pit shaft to block up because of the volume is too big.
In some possible implementations, fig. 2 is a schematic structural diagram of a packing plug body 2 provided in an embodiment of the present disclosure. As shown in fig. 2, the concave surface 20 of the packing plug body 2 is a cylindrical surface, and straight generatrices of the concave surfaces 20 are arranged in parallel.
The cylindrical surface is a curved surface formed by parallel movement of straight lines along a fixed curve, namely a curved surface formed by parallel movement of moving straight lines along a fixed curve. The straight line moving along the fixed curve is called the straight generatrix of the cylinder. The cylindrical surface formed when the fixed curve is a circle is a cylindrical surface.
Among the above-mentioned implementation, packing obturator 2's concave surface 20 can be the face of cylinder, a plurality of concave surfaces 20 are parallel to be arranged side by side, a plurality of concave surfaces 20's straight generating line is all parallel promptly, just can constitute jointly at a plurality of concave surfaces 20 of packing obturator 2's bottom like this and be wavy structure, compare in the volume of single concave surface 20 ability reduction packing obturator 2's the latter half of bigger degree, guarantee to pack the broken back of obturator 2 and be difficult to form the great fragment of volume, thereby effectively avoid the fragment that produces because of the volume is too big and lead to the fact the pit shaft to block up.
In addition, because each concave surface 20 is a cylindrical surface, the received load force can be dispersed to the installation cylinder 1 positioned at the periphery of the packing plug body 2, so that the pressure bearing capacity of the packing plug body 2 is improved, the packing plug body 2 is not easy to break easily during well cementation, and the reliability is improved.
In other possible implementations, fig. 3 is a schematic structural diagram of a packing plug body 2 according to an embodiment of the present disclosure. As shown in fig. 3, the concave surface 20 of the packing plug body 2 is a spherical crown surface, and the plurality of concave surfaces 20 are circumferentially arranged with the central axis of the packing plug body 2 as a center.
In this case, a surface of a portion of a spherical surface sectioned by a plane is called a spherical crown surface.
In the above-mentioned implementation, the concave surface 20 of packing cock body 2 can be the spherical crown face, and a plurality of concave surfaces 20 can use the axis of packing cock body 2 to arrange as central circumference, compare in the volume of single concave surface 20 ability bigger ground reduction packing cock body 2's the latter half, guarantee to pack to be difficult to form the great fragment of volume after packing cock body 2's the latter half is broken to effectively avoid boring the fragment that stopper in-process produced to cause the pit shaft to block up because of the volume is too big.
In addition, because each concave surface 20 is a spherical crown surface, the received load force can be dispersed to the installation cylinder 1 positioned at the periphery of the packing plug body 2, so that the pressure bearing capacity of the packing plug body 2 is improved, the packing plug body 2 is not easy to break easily during well cementation, and the reliability is improved.
Alternatively, the concave surface 20 may be a conical surface. When the concave surface 20 is a conical surface, because the sizes of different radial cross sections of the concave surface 20 in the axial direction are different, and the concave surface 20 is recessed towards the upper connecting end 11 of the mounting cylinder 1, that is, the concave surface 20 is concave, the position where the radial cross section of the concave surface 20 is the largest is the opening position of the concave surface 20, that is, the position where the concave surface 20 is connected with the packing plug body 2. Therefore, when the concave surface 20 is a conical surface, it is necessary to ensure that the diameter of the opening of the concave surface 20 is not less than one half of the diameter of the packing plug body 2, so as to achieve the purpose of reducing the volume of the lower half of the packing plug body 2 to a greater extent and ensuring that fragments with larger volume are not easily formed after the lower half of the packing plug body 2 is crushed.
Fig. 4 is a sectional view of the packing stopper body 2 assembled with the mounting cylinder 1 provided by the present disclosure. As shown in fig. 4, the outer side wall of the packing stopper body 2 has a plurality of strip-shaped limiting protrusions 21, the plurality of strip-shaped limiting protrusions 21 are distributed along the circumferential direction of the packing stopper body 2 at intervals, the strip-shaped limiting protrusions 21 extend along the axial direction of the packing stopper body 2, the inner wall surface of the installation cylinder body 1 has a plurality of limiting grooves 13, the plurality of limiting grooves 13 are distributed along the circumferential direction of the installation cylinder body 1 at intervals, the limiting grooves 13 extend along the axial direction of the installation cylinder body 1, and the strip-shaped limiting protrusions 21 are located in the limiting grooves 13.
Through set up the spacing arch 21 of the strip of radial extension at the lateral wall of packing the cock body 2, and be provided with on the internal face of installation barrel 1 with the spacing recess 13 of the spacing arch 21 assorted of strip, pack 2 cartridge in the installation barrel 1 after, the spacing arch 21 of strip also falls to be located behind the spacing recess 13 to can prevent packing the cock body 2 free rotation in the installation barrel 1. And a plurality of spacing archs 21 of strip and a plurality of spacing recess 13 are mutually supported, can prevent more effectively that the spacing arch 21 of strip from breaking away from in spacing recess 13 under the effect of radial action, further improve the connection reliability of packing stopper body 2 and installation barrel 1.
Because after the well cementation is accomplished, need adopt the drilling plug device to bore to separate the operation to packing the cock body 2, consequently when the drilling plug device that goes into down bores and removes the operation, the drilling plug device is direct with packing the cock body 2 contact, therefore under the drilling plug device drives, can exert the circumferential force in order to order about packing the cock body 2 rotation to packing the cock body 2, influences and bores the operation.
And in this embodiment of the disclosure, the inner wall surface that sets up strip-shaped spacing protrusion 21 and installation barrel 1 through setting up spacing recess 13 at the lateral wall of packing stopper body 2 can effectively prevent the drilling plug device from driving packing stopper body 2 and rotating together, is convenient for bore fast and remove the operation high-efficiently, realizes oil well fast and puts into production.
Illustratively, as shown in fig. 4, an intersection line of planes where two opposite side walls 210 of the strip-shaped limiting protrusion 21 are located coincides with an axis of the packing stopper body 2. The side walls 210 of the bar-shaped limiting protrusion 21 are two opposite plane side walls of the bar-shaped limiting protrusion 21 parallel to the axis of the packing plug body 2. Correspondingly, the limiting groove 13 can also be fan-shaped, so that the strip-shaped limiting protrusion 21 can be arranged in the limiting groove 13.
In the embodiment of the present disclosure, the size of the one end of the packing stopper body 2 that is kept away from on the strip-shaped limiting protrusion 21 is larger, and the size of the one end of the strip-shaped limiting protrusion 21 that is connected with the packing stopper body 2 is smaller, so when the strip-shaped limiting protrusion 21 is installed behind the limiting groove 13, the strip-shaped limiting protrusion 21 is not easy to break away from the limiting groove 13 under the action of the radial acting force, and the connection reliability of the packing stopper body 2 and the installation cylinder body 1 is improved.
In the implementation mode, after the drilling of the drilling and plugging device is completed, the strip-shaped limiting protrusions 21 are retained in the limiting grooves 13, so that the parts, which are not drilled, of the packing and plugging body 2 are also retained on the installation barrel 1, metal rings are not easy to remain after the drilling and the removal are completed, and the drift diameter of a shaft can be reduced.
Exemplarily, as shown in fig. 4, 8 strip-shaped limiting protrusions 21 are arranged on the outer side wall of the packing plug body 2, 8 limiting grooves 13 are arranged on the inner wall surface of the installation cylinder 1, the strip-shaped limiting protrusions 21 correspond to the limiting grooves 13 one to one, and the strip-shaped limiting protrusions 21 are simultaneously installed in the corresponding limiting grooves 13 to jointly prevent the rotation of the packing plug body 2, so that the drilling operation can be efficiently and rapidly performed, and the oil well production can be rapidly realized.
Alternatively, as shown in fig. 1, the end surface of the packing stopper body 2 near the upper connecting end 11 may have a slip-proof structure.
Wherein the slip prevention structure may include at least one of the slip prevention groove 23 and the slip prevention protrusion 22.
Because after the well cementation is accomplished, need adopt the drilling plug device to bore to the packing cock body 2 and remove the operation, consequently when the drilling plug device that goes into down bores and removes the operation, the drilling plug device is direct with packing cock body 2 contact, if packing cock body 2's top frictional force is less, skid easily when the drill bit 42 of drilling plug device contacts with packing cock body 2's top to lead to the drilling rate too slow, the extension bores the construction time who removes the operation, is unfavorable for realizing oil well fast and puts into production.
In the embodiment of the disclosure, the anti-slip groove 23 or the anti-slip protrusion 22 is arranged on the end surface of the packing plug body 2 close to the upper connecting end 11, so that the friction force between the top end of the packing plug body 2 and the drill bit 42 of the drilling plug device can be improved, the drill bit 42 is prevented from slipping easily, the drilling speed is improved, the construction time of drilling removal operation is shortened, and the oil well production is realized quickly.
Illustratively, as shown in fig. 1, the top end of the packing plug body 2 has a plurality of skidproof protrusions 22, the skidproof protrusions 22 have a triangular cross section, and the skidproof protrusions 22 may be arranged in an array, so that the top end of the packing plug body 2 forms a saw-tooth shape.
Fig. 5 is a schematic view of a drill bit 42 of a drilling device according to an embodiment of the disclosure. As shown in FIG. 5, the end of the drill bit 42 has the anti-slip grooves 23 which are engaged with the anti-slip protrusions 22, and the anti-slip grooves 23 are triangular grooves, and the plurality of anti-slip grooves 23 on the drill bit 42 form a saw-toothed structure. When the drill bit 42 contacts with the top end of the packing plug body 2, the drill bit 42 can be meshed with the packing plug body 2, so that the drill bit 42 is prevented from slipping easily, the drilling speed is increased, the construction time of drilling removal operation is shortened, and the oil well production can be quickly realized.
Alternatively, as shown in fig. 1, the mounting cylinder 1 may include an upper joint 31 and a lower joint 32, and a lower end of the upper joint 31 is detachably connected to an upper end of the lower joint 32.
Wherein the lower end of the upper joint 31 can be threadedly coupled with the upper end of the lower joint 32. So as to accomplish the quick assembly and disassembly of the upper joint 31 and the lower joint 32.
Optionally, as shown in fig. 1, a sealing ring 41 may be further disposed between the upper joint 31 and the lower joint 32 to improve the sealing performance between the upper joint 31 and the lower joint 32, so as to prevent the liquid at the upper section of the cementing isolation device from leaking from the joint of the two joints during the completion operation.
Illustratively, as shown in fig. 1, the lower end of the upper joint 31 is sleeved outside the upper end of the lower joint 32, the inner wall surface of the upper joint 31 is provided with an inner flange 33, and at least a partial region of the packing stopper body 2 is located between the inner flange 33 and the upper end of the lower joint 32 in the axial direction of the installation cylinder 1.
As shown in fig. 1, the packing plug body 2 is in a stepped shaft shape, the packing plug body 2 has a first cylindrical portion and a second cylindrical portion which are coaxially connected, and the diameter of the first cylindrical portion is smaller than that of the second cylindrical portion. The first cylindrical portion may be inserted into the inner flange 33 of the upper joint 31, the second cylindrical portion may be disposed between the inner flange 33 and the upper end of the lower joint 32, and the bar-shaped limiting protrusion 21 is located in the second cylindrical portion.
Thus, after the packing plug body 2 is installed on the installation cylinder body 1, the first cylindrical part is inserted into the inner flange 33, and a sealing ring 41 can be arranged between the outer wall of the first cylindrical part and the inner wall of the inner flange 33, so that the sealing performance between the packing plug body 2 and the installation cylinder body 1 is improved, and the liquid at the upper section of the well cementation isolating device is prevented from leaking from the gap between the packing plug body 2 and the installation cylinder body 1 during well completion operation. The upper end of the second cylindrical portion abuts against the lower end of the inner flange 33, and the lower end of the second cylindrical portion abuts against the upper end of the lower joint 32. Thereby avoid packing the cock body 2 and rock from top to bottom in installation barrel 1, and utilize the tip of lower clutch 32 to support the second cylinder portion of packing the cock body 2, support packing the cock body 2, make packing the cock body 2 can undertake great pressure.
Illustratively, the lower end of the upper joint 31 is inserted into the upper end of the lower joint 32, the inner wall surface of the lower joint 32 has an inner flange 33, and at least a partial region of the packing stopper 2 is located between the inner flange 33 and the lower end of the upper joint 31 in the axial direction of the mounting cylinder 1.
After the packing plug body 2 is installed on the installation cylinder body 1, the top end of the packing plug body 2 abuts against the lower end, and the bottom end of the packing plug body 2 abuts against the inner flange 33. Therefore, the packing plug body 2 is prevented from shaking up and down in the installation cylinder body 1, the inner flange 33 is used for abutting against the packing plug body 2 to support the packing plug body 2, and the packing plug body 2 can bear larger pressure.
The process of using the well cementation isolating device provided by the embodiment of the disclosure is as follows, firstly, the well cementation isolating device is installed on a pipe column through an upper joint 31 and a lower joint 32 and is put into a shaft to play a role in isolating the upper space and the lower space of the pipe column; then, cementing operation is carried out; after the well cementation is finished, when the drilling and removing construction is carried out, the drilling plug device is put into the well cementation isolation device, so that the anti-slip groove 23 of the drill bit 42 is meshed with the anti-slip bulge 22 at the top end of the packing plug body 2, and the drilling and removing operation is carried out.
Fig. 6 is a schematic view of a first construction state of a cementing isolation device provided by the embodiment of the disclosure. As shown in fig. 6, during the drilling process, the drill bit 42 engages with the top end of the packing plug body 2 to gradually drill the packing plug body 2 from top to bottom.
FIG. 7 is a schematic view of a second construction state of the cementing isolation device provided by the embodiment of the disclosure. As shown in figure 7, after the drilling-out operation is finished, the structure that the packing plug body 2 is left in the shaft is shown in figure 7, so that the full drift diameter of the inner cavity of the well cementation isolation device is realized, and the subsequent oil well production is facilitated.
Although the present disclosure has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the disclosure.
Claims (10)
1. A cementing isolation device, comprising:
the mounting cylinder body (1) is provided with an upper connecting end (11) and a lower connecting end (12) which are opposite;
the packing plug body (2) is positioned in the installation cylinder body (1), the outer wall surface of the packing plug body is in sealing connection with the inner wall surface of the installation cylinder body (1), and the end surface, close to the lower connecting end (12), of the packing plug body (2) is a concave surface (20).
2. The cementing isolation device of claim 1, wherein the concave surface (20) is a spherical crown surface.
3. The cementing insulation of claim 1, wherein the recessed surface (20) is a conical surface.
4. Cementing isolation device according to claim 2 or 3, characterized in that the diameter of the orthographic projection of the concave surface (20) on a plane perpendicular to the axis of the packer plug body (2) is not less than half the diameter of the packer plug body (2).
5. The well cementation isolation device according to any one of claims 1 to 3, wherein the outer side wall of the packing plug body (2) is provided with a plurality of strip-shaped limiting protrusions (21), the plurality of strip-shaped limiting protrusions (21) are distributed at intervals along the circumferential direction of the packing plug body (2), the strip-shaped limiting protrusions (21) extend along the axial direction of the packing plug body (2), the inner wall surface of the installation cylinder body (1) is provided with a plurality of limiting grooves (13), the plurality of limiting grooves (13) are distributed at intervals along the circumferential direction of the installation cylinder body (1), the limiting grooves (13) extend along the axial direction of the installation cylinder body (1), and the strip-shaped limiting protrusions (21) are located in the limiting grooves (13).
6. The cementing insulation device according to claim 5, characterized in that the intersection line of the planes of the two opposite side walls of the strip-shaped limiting bulge (21) coincides with the axis of the packer body (2).
7. The cementing insulation device according to any one of claims 1 to 3, characterized in that the packer body (2) has an anti-slip structure on its end face near the upper connection end (11).
8. The cementing isolation device of claim 7, wherein the slip resistant structure comprises at least one of a slip resistant groove (23) and a slip resistant bead (22).
9. Cementing isolation device according to any of the claims 1 to 3, characterized in that the installation cylinder (1) comprises an upper joint (31) and a lower joint (32), the lower end of the upper joint (31) being detachably connected with the upper end of the lower joint (32),
the lower end of the upper joint (31) is sleeved outside the upper end of the lower joint (32), the inner wall surface of the upper joint (31) is provided with an inner flange (33), and at least part of the area of the packing plug body (2) is positioned between the inner flange (33) and the upper end of the lower joint (32) in the axial direction of the installation cylinder body (1); alternatively, the first and second electrodes may be,
the lower end of the upper joint (31) is inserted into the upper end of the lower joint (32), an inner flange (33) is arranged on the inner wall surface of the lower joint (32), and at least part of the area of the packing plug body (2) is positioned between the inner flange (33) and the lower end of the upper joint (31) in the axial direction of the installation cylinder body (1).
10. The cementing insulation device according to any one of the claims 1 to 3, characterized in that a sealing ring (41) is provided between the outer sidewall of the packer body (2) and the inner wall surface of the installation cylinder (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011004359.8A CN112253037A (en) | 2020-09-22 | 2020-09-22 | Well cementation isolating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011004359.8A CN112253037A (en) | 2020-09-22 | 2020-09-22 | Well cementation isolating device |
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| Publication Number | Publication Date |
|---|---|
| CN112253037A true CN112253037A (en) | 2021-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011004359.8A Pending CN112253037A (en) | 2020-09-22 | 2020-09-22 | Well cementation isolating device |
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| CN (1) | CN112253037A (en) |
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| US5113940A (en) * | 1990-05-02 | 1992-05-19 | Weatherford U.S., Inc. | Well apparatuses and anti-rotation device for well apparatuses |
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| CN207092984U (en) * | 2017-07-28 | 2018-03-13 | 中国石油集团渤海钻探工程有限公司 | Exempt from drill integrated blind plate guide shoe |
| CN208763623U (en) * | 2018-09-13 | 2019-04-19 | 包振江 | A kind of Cementing rubber plug anti-rotation device |
| CN109989725A (en) * | 2017-12-29 | 2019-07-09 | 中石化石油工程技术服务有限公司 | Exempt from brill formula blind plate and exempts to bore plug well shaft fixing technology |
| CN209838367U (en) * | 2018-11-23 | 2019-12-24 | 克拉玛依市金鑫科技有限公司 | Device for preventing rubber plug from rotating and separating |
| CN111206899A (en) * | 2020-01-07 | 2020-05-29 | 青岛理工大学 | Spring-driven step-by-step axial extrusion throttling device with double rubber cylinders |
| CN211474070U (en) * | 2019-11-05 | 2020-09-11 | 中国石油化工股份有限公司 | Fishing type blanking plug |
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2020
- 2020-09-22 CN CN202011004359.8A patent/CN112253037A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5113940A (en) * | 1990-05-02 | 1992-05-19 | Weatherford U.S., Inc. | Well apparatuses and anti-rotation device for well apparatuses |
| CN201963251U (en) * | 2011-03-24 | 2011-09-07 | 大港油田集团有限责任公司 | Blind plate with plug capable of being quickly drilled |
| CN207092984U (en) * | 2017-07-28 | 2018-03-13 | 中国石油集团渤海钻探工程有限公司 | Exempt from drill integrated blind plate guide shoe |
| CN109989725A (en) * | 2017-12-29 | 2019-07-09 | 中石化石油工程技术服务有限公司 | Exempt from brill formula blind plate and exempts to bore plug well shaft fixing technology |
| CN208763623U (en) * | 2018-09-13 | 2019-04-19 | 包振江 | A kind of Cementing rubber plug anti-rotation device |
| CN209838367U (en) * | 2018-11-23 | 2019-12-24 | 克拉玛依市金鑫科技有限公司 | Device for preventing rubber plug from rotating and separating |
| CN211474070U (en) * | 2019-11-05 | 2020-09-11 | 中国石油化工股份有限公司 | Fishing type blanking plug |
| CN111206899A (en) * | 2020-01-07 | 2020-05-29 | 青岛理工大学 | Spring-driven step-by-step axial extrusion throttling device with double rubber cylinders |
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Application publication date: 20210122 |