CN115492552A - Drilling-free oil removal casing temporary plugging nipple and application thereof - Google Patents
Drilling-free oil removal casing temporary plugging nipple and application thereof Download PDFInfo
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- CN115492552A CN115492552A CN202110672493.3A CN202110672493A CN115492552A CN 115492552 A CN115492552 A CN 115492552A CN 202110672493 A CN202110672493 A CN 202110672493A CN 115492552 A CN115492552 A CN 115492552A
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- 210000002445 nipple Anatomy 0.000 title claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 238000005553 drilling Methods 0.000 claims abstract description 16
- 230000005284 excitation Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000004913 activation Effects 0.000 claims abstract description 6
- 238000007667 floating Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 28
- 239000011521 glass Substances 0.000 claims description 27
- 238000010304 firing Methods 0.000 claims description 21
- 238000003825 pressing Methods 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 9
- 239000010419 fine particle Substances 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 13
- 238000004090 dissolution Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 101150013568 US16 gene Proteins 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/063—Valve or closure with destructible element, e.g. frangible disc
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a temporary plugging nipple of a drilling-free oil removal casing pipe and application thereof, belonging to the field of downhole tools for petroleum drilling and completion. The temporary plugging short section of the drilling-free oil removal sleeve comprises: the upper joint, the lower joint, a shear pin sleeve and a crushing excitation mechanism are arranged in an inner cavity of the lower joint; a rupture disc is arranged at the upper part in the inner cavity of the shear pin sleeve, and the crushing excitation mechanism is arranged below the rupture disc; the crushing activation mechanism is capable of causing crushing of the rupture disc when the rupture disc is moved downwardly into contact with the crushing activation mechanism. The device can bear the high pressure difference of more than 50MPa in the pipe, the internal temporary plugging element can be broken under certain pressure, the requirement of the full diameter in the pipe is met, a special tool is not needed to be put in for setting, and drilling and removing are not needed in the follow-up process, so that the operation cost is greatly reduced, the operation is simpler, and the reliability is higher. Meanwhile, the device can also be used as a floating casing running device to increase the buoyancy of the horizontal casing.
Description
Technical Field
The invention belongs to the field of downhole tools for petroleum drilling and completion, and particularly relates to a temporary plugging nipple for a drilling-free oil removal casing pipe and application thereof.
Background
When packer setting or oil casing test need be carried out, often need carry out temporarily stifled to the intraductal, get rid of again or take out temporarily stifled instrument and make intraductal unobstructed again after accomplishing the test to carry out subsequent operation and production. Most of the existing temporary plugging tools are devices such as bridge plugs or plugging devices, special tools need to be used for running in and setting before testing, and the temporary plugging tools need to be removed through operations such as recovery, drilling removal or dissolution after testing is finished. These techniques have the following disadvantages:
(1) Before testing, a special tool is needed to be used for running and setting, so that the operation time is increased, the setting effect is difficult to guarantee, and related tests cannot be completed due to setting failure;
(2) The difficulty of removing the temporary plug after the test is high, a special tool needs to be put into the temporary plug, and the recovery success rate cannot be guaranteed; drilling removal needs to reorganize the drilling machine for operation, so that the operation cost is greatly increased; the dissolution time is often long, and the dissolution state cannot be accurately judged, so that the running of a subsequent operation pipe column can be influenced.
Therefore, the chinese patent publication CN111441741a discloses a soluble pumpable open temporary bridge plugging tool and a use method thereof, wherein a main body of the tool is made of a soluble alloy material, and a packer rubber sleeve is made of a soluble rubber material. After the temporary blocking function is finished, the channel in the mandrel can be opened under pressure, and the rapid production is obtained; other packer components may dissolve slowly in the well environment without the need for drilling out operations and the like. This technique has the following problems: the temporary plugging function can be realized only after the temporary plugging device is lowered and sealed by a special tool; the internal channel after being blocked is smaller, and the subsequent pipe string descending is influenced; the dissolution needs a certain time and the dissolution state can not be guaranteed.
Chinese patent publication No. CN1910336a discloses a temporary plug made of glass material, in which a plurality of disc-shaped glass or ceramic elements with given thickness are installed, and the glass disc realizes temporary plugging in a pipe, is used for plugging pressure in the pipe, and can bear upper and lower pressure difference. After the test is finished, the explosive preset above the glass is detonated and crushed into small particles, and the small particles can be circulated out along with the drilling fluid, so that the full drift diameter in the pipe is realized. Although the technology well solves the problem that a conventional temporary plugging tool is difficult to remove, the explosive still needs to be preset, and the explosion of the explosive can cause damage to other parts in the pipe, and meanwhile, certain risks exist in the transportation and installation processes, the requirements on transportation and storage are high, and the field application and industrial production are inconvenient.
The US patent publication US15/753633 discloses a temporary plug, in which one or more glass discs are mounted, and fixed on a housing through a specific mechanism, when the temporary plug needs to be removed, locking mechanisms 13 and 14 are separated through mechanical or hydraulic pressure, and the glass discs quickly descend to impact bolts 12 on the side face of a body, so that the glass discs are broken, and the full diameter in a pipe is realized. This patent crushes the glass discs by side-mounted bolts, which present a leakage risk.
US patent publication US14/777893 discloses a glass temporary plug which uses multiple layers of glass, glass discs filled with incompressible liquid and fitted with hydraulic valves. When the wellhead is pressed, the hydraulic valve is opened, liquid between the glass discs leaks, the two glass discs move oppositely to contact the needle claw devices on the side surfaces, and the glass is broken to realize the full drift diameter. The disadvantage of this device is that the hydraulic valve may risk leakage leading to premature breakage of the glass.
US patent publication US16/035228 discloses a temporary plug having a glass disc mounted inside, a shearable tray below the disc, and a protrusion mechanism mounted on the side of the tray. When the pressure in the pipe is suppressed to a certain pressure, the tray shearing ring is sheared to descend, the side surface of the glass contacts the protrusion mechanism, the glass is crushed, and the full diameter in the pipe is realized. This patent realizes pressure control through the shear ring, and the shear pressure control degree of difficulty of shear ring is big, and the performance stability who requires to the material is high. Meanwhile, the glass disc is impacted by the bulges on the side surface to break the glass, the side surface is in contact with the glass disc in a non-point contact manner, the local load is not large, instantaneous breakage can not be caused, and the glass breaking effect is influenced.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a drilling-free temporary plugging nipple for an oil removal casing and application thereof, which can bear high pressure in a pipe, can be quickly and reliably removed under the condition of wellhead pressure building, realizes full diameter in the pipe, reduces operation risk, and improves operation efficiency.
The invention is realized by the following technical scheme:
in a first aspect of the present invention, there is provided a drilling-free oil removal casing pipe temporary plugging nipple, including: the upper joint, the lower joint, a shear pin sleeve and a crushing excitation mechanism are arranged in an inner cavity of the lower joint;
a rupture disc is arranged at the upper part in the inner cavity of the shear pin sleeve, and the crushing excitation mechanism is arranged below the rupture disc;
the crushing activation mechanism is capable of causing crushing of the rupture disc when the rupture disc is moved downwardly into contact with the crushing activation mechanism.
The invention is further improved in that:
the shear pin sleeve is of a cylindrical structure, an annular boss coaxial with the shear pin sleeve is arranged on the inner wall of the middle part of the shear pin sleeve, and the lower end face of the rupture disc is in contact with the upper end face of the annular boss;
a plurality of striker grooves are formed in the annular boss, and each striker groove penetrates through the annular boss from bottom to top.
The lower part of the shear pin sleeve is provided with a plurality of first shear pin holes, and the first shear pin holes penetrate through the wall of the shear pin sleeve.
Preferably, the central axis of each first shear pin hole is perpendicular to the central axis of the shear pin sleeve;
preferably, a plurality of first shear pin holes are uniformly distributed on the circumference;
preferably, a plurality of needle striking grooves are uniformly distributed on the circumference of the annular boss.
The invention is further improved in that:
an inner sealing groove is formed in the inner wall of the shear pin sleeve and is positioned above the annular boss, and an inner sealing ring is installed in the inner sealing groove;
an outer sealing groove is formed in the outer wall of the lower portion of the shear pin sleeve and located above the first shear pin hole, and an outer sealing ring is installed in the outer sealing groove.
The invention is further improved in that:
a pressure cap is arranged above the rupture disc;
the pressing cap is of a cylindrical structure, and the upper end of the pressing cap is provided with an outward annular flanging;
the outer wall of the lower part of the pressing cap is provided with an external thread, the inner wall of the upper part of the shear pin sleeve is provided with an internal thread, the internal thread is positioned above the internal sealing groove, and the pressing cap is connected to the upper part of the shear pin sleeve through a thread;
the upper end face of the rupture disc is in contact with the lower end face of the pressing cap, the upper end face of the pressing cap is in contact with the lower end face of the upper connector, and the lower end face of the annular flanging of the pressing cap is in contact with the upper end face of the shear pin sleeve.
The invention is further improved in that:
the crushing excitation mechanism includes: a shear pin and a firing pin sleeve;
the striker sleeve is of a cylindrical structure, the outer wall of the striker sleeve is of a stepped shaft structure and comprises a large-diameter section and a small-diameter section, and a striker sleeve step is formed between the large-diameter section and the small-diameter section;
a plurality of second shear pin holes are formed in the small-diameter section, and the second shear pin holes correspond to the first shear pin holes in the shear pin sleeve one by one;
the end part of the small-diameter section is provided with a plurality of firing pins, the bottom of each firing pin is connected with the end surface of the small-diameter section, and the top of each firing pin is of a sharp structure;
the firing pins on the firing pin sleeve correspond to the firing pin grooves on the shear pin sleeve one to one.
The invention is further improved in that:
the inner diameter of the striker sleeve is the same as that of the annular boss on the shear pin sleeve.
Preferably, the central axis of each second shear pin hole is perpendicular to the central axis of the firing pin sleeve;
preferably, the plurality of second shear pin holes are evenly distributed on the circumference.
The invention is further improved in that:
a lower step is arranged on the inner wall of the lower joint, and the lower end face of the striker sleeve is in contact with the lower step;
the small-diameter section of the striker sleeve is inserted into the inner cavity of the shear pin sleeve from the lower end of the shear pin sleeve, each first shear pin hole is aligned with each second shear pin hole, and each striker is positioned in each striker groove;
the shear pin sequentially passes through the first shear pin hole and the second shear pin hole to connect the shear pin sleeve and the firing pin sleeve;
a gap is arranged between the upper end surface of the striker sleeve and the lower end surface of the rupture disc, and a gap is arranged between the lower end surface of the shear pin sleeve and the step of the striker sleeve.
The invention is further improved in that:
the rupture disc is made of one or more layers of high-strength fragile glass or ceramic materials;
the rupture disc has a surface strength of 350MPa or greater and a single layer capable of withstanding high differential pressures of 50MPa or greater.
The invention is further improved in that:
the outer wall of the lower end of the upper joint is provided with an external thread, and the inner wall of the upper end of the lower joint is provided with an internal thread;
the lower end of the upper joint is inserted into the inner cavity of the upper end of the lower joint, and the upper joint and the lower joint are connected through threads;
a sealing ring is arranged on the outer wall of the lower end of the upper joint;
the inner wall of the upper end of the upper joint is provided with an internal thread, and the outer wall of the lower end of the lower joint is provided with an external thread which is respectively used for being connected with the pipe columns above and below.
In a second aspect of the present invention, an application method of the above drilling-free oil removing casing pipe temporary plugging short section is provided, where the method includes:
connecting the temporary plugging short section of the drilling-free oil removal casing pipe to a well pipe string, and putting the pipe into a designed depth position to realize temporary plugging in the pipe;
performing construction operation in the pipe string above the temporary plugging short section of the drilling-free oil removal sleeve;
after the construction operation is finished, the pressure is continuously suppressed until the shear pin is cut off, the rupture disc rapidly and downwards impacts the plunger sleeve along with the shear pin sleeve, the plunger on the plunger sleeve enables the rupture disc to be broken into fine particles, the fine particles flow out along with well drilling fluid, and then plugging is removed.
In a third aspect of the present invention, another application method of the above drilling-free oil removing casing pipe temporary plugging short section is provided, where the method includes:
the temporary plugging short section of the drilling-free oil removal sleeve is connected to the middle of the sleeve to serve as a floating casing running device, and drilling fluid at the upper part is isolated through the temporary plugging short section of the drilling-free oil removal sleeve, so that buoyancy of a horizontal section sleeve is increased, and running friction resistance is reduced.
Compared with the prior art, the invention has the beneficial effects that: the temporary plugging nipple joint of the oil casing pipe can bear the high pressure difference of more than 50MPa in the pipe, the temporary plugging element in the pipe can be broken under certain pressure, the requirement of the full drift diameter in the pipe is met, special tools for setting are not needed to be put in the pipe, the pipe is not needed to be drilled in the follow-up process, the operation cost is greatly reduced, the operation is simpler, and the reliability is higher. Meanwhile, the device can also be used as a floating casing running device and connected to the middle part of the casing to isolate drilling fluid on the upper part, so that the buoyancy of the casing at the horizontal section is increased, the running friction resistance is reduced, and the running success rate of the long horizontal casing is improved.
Drawings
FIG. 1 is a schematic structural diagram of a temporary plugging short section of a drilling-free oil removal casing;
FIG. 2 is a schematic diagram of a temporary plugging nipple of a drill-free oil removal casing pipe before a rupture disk is broken;
FIG. 3 is a schematic diagram of a drilling-free oil removal casing pipe temporary plugging short section after a rupture disc is broken;
FIG. 4 is a schematic view of a striker sleeve configuration;
FIG. 5 is a schematic view of a shear pin sleeve configuration;
wherein the content of the first and second substances,
1-upper joint
2-pressing cap
3-rupture disc
4-shear pin sleeve
5-shear pin
6-firing pin sleeve
7-lower joint
601-firing pin
602-shear pin hole
401-striker slot.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
the invention provides a temporary blocking nipple of a drilling-free oil removal sleeve, which is internally provided with one or more layers of rupture discs made of glass or ceramics, wherein the rupture discs can bear high pressure difference of more than 50MPa at two sides. The lower extreme of rupture disk is provided with broken excitation mechanism, and test operation such as pressure testing accomplishes the back, can suppress pressure to certain pressure at the well head, arouses broken excitation mechanism through broken excitation mechanism striking rupture disk, applys point pressure load, makes the rupture disk broken.
Preferably, the rupture disc is made of high-strength fragile glass or ceramic and can be crushed into fine particles under impact, so that well fluid can be circulated out while drilling without affecting subsequent operation.
The examples of the invention are as follows:
[ EXAMPLES one ]
As shown in fig. 1, the temporary plugging nipple of the drilling-free oil removal casing of the invention comprises: the device comprises an upper joint 1, a lower joint 7, a shear pin sleeve 4 and a crushing excitation mechanism, wherein the shear pin sleeve 4 and the crushing excitation mechanism are arranged in an inner cavity of the lower joint 7, a rupture disc 3 is arranged at the upper part in the inner cavity of the shear pin sleeve 4, and the crushing excitation mechanism is arranged below the rupture disc 3; when the rupture disc 3 is moved down into contact with the crushing activating mechanism, the crushing activating mechanism can crush the rupture disc 3.
Preferably, the rupture disc 3 is made of one or more layers of high-strength fragile glass or ceramic materials, the surface strength of the rupture disc reaches more than 350MPa, and a single layer of rupture disc can bear high pressure difference of more than 50 MPa.
Specifically, be provided with the external screw thread on the lower extreme outer wall of top connection 1, be provided with the internal thread on the upper end inner wall of lower clutch 7, during the upper end inner chamber of lower clutch 7 was inserted to the lower extreme of top connection 1, both passed through threaded connection, and was provided with the sealing washer on the lower extreme outer wall of top connection 1, realized the sealing connection between top connection 1 and the lower clutch 7 through the sealing washer.
Furthermore, an inner thread is arranged on the inner wall of the upper end of the upper joint 1, and an outer thread is arranged on the outer wall of the lower end of the lower joint 7, and the inner thread and the outer thread are respectively used for being connected with a pipe column above and below.
[ example two ]
As shown in fig. 5, the shear pin sleeve 4 is a cylindrical structure, an annular boss coaxial with the shear pin sleeve 4 is arranged on the inner wall of the middle part of the shear pin sleeve 4, and is used for limiting the downward movement of the rupture disk 3, specifically, the lower end face of the rupture disk 3 contacts with the upper end face of the annular boss, and the rupture disk 3 is supported by the annular boss.
Preferably, an inner sealing groove is formed in the inner wall of the shear pin sleeve 4 and located above the annular boss, and an inner sealing ring is installed in the inner sealing groove and used for achieving high-pressure sealing between the cylindrical outer wall of the rupture disc 3 and the inner wall of the shear pin sleeve 4.
Furthermore, a plurality of striker grooves are formed in the annular boss, and each striker groove penetrates through the annular boss from bottom to top. Preferably, a plurality of needle striking grooves are uniformly distributed on the circumference of the annular boss.
Furthermore, a plurality of first shear pin holes are formed in the lower portion of the shear pin sleeve 4, the first shear pin holes penetrate through the wall of the shear pin sleeve 4, preferably, the central axis of each first shear pin hole is perpendicular to the central axis of the shear pin sleeve 4, and preferably, the first shear pin holes are uniformly distributed on the circumference.
Preferably, an outer sealing groove is formed in the outer wall of the lower portion of the shear pin sleeve 4, the outer sealing groove is located above the first shear pin hole, and an outer sealing ring is installed in the outer sealing groove and used for sealing between the shear pin sleeve 4 and the lower joint 7.
Further, the top of rupture disc is provided with presses cap 2, press cap 2 to be cylindric structure, and its upper end is provided with outside annular turn-ups press cap 2's lower part outer wall on be provided with the external screw thread be provided with the internal thread on the upper portion inner wall of shear pin cover 4, the internal thread is located the top of inside seal groove, press cap 2 through threaded connection in shear pin cover 4's upper portion, rupture disc 3's up end with press cap 2's lower extreme contact, press cap 2's up end with the lower terminal surface contact of top connection 1, press cap 2's annular turn-ups's lower terminal surface with shear pin cover 4's up end contact, top connection 1 and shear pin cover 4 compress tightly press cap 2 like this to fix rupture disc 3 in shear pin cover 4's inner chamber through pressing cap 2 and annular boss, can prevent rupture disc 3 from taking place ascending removal through pressing cap 2 like this.
[ EXAMPLE III ]
The crushing excitation mechanism includes: a shear pin 5 and a firing pin sleeve 6. As shown in fig. 4, the striker sleeve 6 is a cylindrical structure, the outer wall of the striker sleeve 6 is a stepped shaft structure, and the striker sleeve includes a large diameter section and a small diameter section, the outer diameter of the large diameter section is greater than the outer diameter of the small diameter section, a striker sleeve step is formed between the large diameter section and the small diameter section, a plurality of second shear pin holes 602 are provided on the small diameter section, preferably, the central axis of each second shear pin hole 602 is perpendicular to the central axis of the striker sleeve 6, preferably, the plurality of second shear pin holes 602 are uniformly distributed on the circumference, and the first shear pin holes on the shear pin sleeve 4 correspond to the second shear pin holes 602 on the striker sleeve 6 one to one.
A plurality of strikers 601 are arranged at the end of the small-diameter section, the bottom of each striker 601 is connected with the end face of the small-diameter section, the top of each striker 601 is of a sharp structure, for example, a needle point-shaped structure can be adopted, and each striker 601 can apply a point pressure load to the rupture disc 3 to promote the rupture disc 3 to be broken. The strikers 601 on the striker sleeve 6 correspond one-to-one to the striker slots 401 on the shear pin sleeve 4.
Preferably, the inner diameter of the striker sleeve is the same as the inner diameter of the annular boss on the shear pin sleeve, so that after the rupture disk is broken, the inner diameter of the whole device is the inner diameter of the annular boss.
During assembly, the small-diameter section of the striker sleeve 6 is inserted into the inner cavity of the shear pin sleeve 4 from the lower end of the shear pin sleeve 4, each first shear pin hole is aligned with each second shear pin hole, each striker 601 is located in each striker groove 401, the shear pin 5 sequentially penetrates through the first shear pin hole and the second shear pin hole to connect the shear pin sleeve 4 with the striker sleeve 6, at the moment, a gap exists between the upper end face of the striker sleeve 6 and the lower end face of the rupture disc 3 (namely, the top end of the striker is lower than the upper end face of the annular boss), a gap also exists between the lower end face of the shear pin sleeve 4 and the step of the striker sleeve, and thus, a space is reserved for downward movement of the shear pin sleeve 4.
The shear pin sleeve and the striker sleeve are of two-layer structures, if the inner surface of the shear pin sleeve is a complete cylindrical surface, the striker sleeve needs to be designed within the inner surface of the shear pin sleeve, and meanwhile, in order to support the rupture disc through the annular boss, the thickness of the annular boss needs to be ensured, so that the outer diameter of the striker sleeve is certainly required to be smaller than the inner diameter of the annular boss, and the inner diameter of the striker sleeve is smaller than the outer diameter of the striker sleeve, so that the inner diameter of the striker sleeve becomes smaller, and further the integral inner diameter of the tool is reduced. Therefore, the groove (namely the striker groove 401) is designed in the shear pin sleeve, so that the sharp striker is hidden in the striker groove, and the inner diameter of the striker sleeve is the same as that of the annular boss, so that the through diameter in the pipe is greatly increased through the striker groove 401, and the striker can be prevented from blocking the descending of other tools after construction.
When the nail cutting sleeve 4 moves downwards in use, the striker groove 401 and the rupture disk 3 move downwards, and correspondingly, the top end of the striker 601 extends out of the upper end of the striker groove 401 to be in contact with the rupture disk 3, so that the rupture disk 3 is crushed.
Further, a lower step is provided on the inner wall of the lower joint 7, and the lower end surface of the striker sleeve 6 is in contact with the lower step, so that the striker sleeve 6 is supported by the lower step so as not to move downward.
The invention adopts a plurality of shear pins to realize pressure control, can adjust the pressure through the change of the number of the shear pins, has wider requirements on the performance of the shear pin material and can more accurately adjust the pressure. Moreover, the present invention realizes point contact by striking the rupture disk from the lower part with the striker, and can more effectively crush the rupture disk.
The application embodiment of the device of the invention is as follows:
[ EXAMPLE IV ]
The device can be used for field operation such as oil casing pressure test, packer setting, temporary plugging in the pipe and the like, does not need to be set by a special tool, and does not need to be drilled and removed subsequently, so that the operation cost is greatly reduced, the operation is simpler, and the reliability is higher.
Specifically, the device of the invention is driven to the designed depth along with the oil casing pipe string, so that temporary blocking in the pipe is realized, and pressure test or other pressure operation can be carried out on the upper part of the device. More specifically, the temporary plugging nipple is connected in a well pipe string and is lowered to the designed depth, as shown in fig. 2, due to the fact that a rupture disc exists in the pipe, temporary plugging in the pipe can be achieved, and construction operation in the pipe string on the upper portion of the device can be conducted, such as pressure testing and packer setting. After the operation is finished, the temporary plugging short section needs to be removed, at this time, the pressure can be continuously suppressed to a set pressure, the shear pin 5 is cut off, the rupture disc 3 quickly and downwards impacts the striker sleeve 6 along with the shear pin sleeve 4, the striker 601 on the striker sleeve 6 enables the rupture disc 3 to be broken into fine particles, the fine particles flow out along with well drilling fluid, the plugging in the pipe is further relieved, and the requirements of pipe string descending and operation are met, as shown in fig. 3.
[ EXAMPLE V ]
The device is connected to the middle of the casing pipe to serve as a floating casing pipe running device, and drilling fluid on the upper part is isolated through the device, so that the buoyancy of the casing pipe on the horizontal section is increased, the running friction resistance is reduced, the running success rate of the long horizontal casing pipe is improved, and the device has wide application prospects.
In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Finally, it should be noted that the above-mentioned technical solution is only one embodiment of the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be easily made based on the application method and principle of the present invention disclosed, and the method is not limited to the above-mentioned specific embodiment of the present invention, so that the above-mentioned embodiment is only preferred, and not restrictive.
Claims (13)
1. The utility model provides a bore-free deoiling sleeve pipe temporary blocking nipple joint which characterized in that: exempt from to bore oil removal sleeve pipe temporary blocking nipple joint includes: the upper joint, the lower joint, a shear pin sleeve and a crushing excitation mechanism are arranged in an inner cavity of the lower joint;
a rupture disc is arranged at the upper part in the inner cavity of the shear pin sleeve, and the crushing excitation mechanism is arranged below the rupture disc;
the rupture disc is caused to rupture by the rupture activation mechanism when the rupture disc is moved downwardly into contact with the rupture activation mechanism.
2. The drilling-free oil removal casing pipe temporary plugging short section as claimed in claim 1, characterized in that: the shear pin sleeve is of a cylindrical structure, an annular boss coaxial with the shear pin sleeve is arranged on the inner wall of the middle part of the shear pin sleeve, and the lower end face of the rupture disc is in contact with the upper end face of the annular boss;
a plurality of needle striking grooves are formed in the annular boss, and each needle striking groove penetrates through the annular boss from bottom to top;
the lower part of the shear pin sleeve is provided with a plurality of first shear pin holes, and the first shear pin holes penetrate through the wall of the shear pin sleeve.
3. The drilling-free oil removal casing pipe temporary plugging nipple joint as claimed in claim 2, characterized in that: the central axis of each first shear pin hole is vertical to the central axis of the shear pin sleeve;
the first shear pin holes are uniformly distributed on the circumference;
a plurality of needle hitting grooves are uniformly distributed on the circumference of the annular boss.
4. The drilling-free oil removal casing pipe temporary plugging short section as claimed in claim 3, characterized in that: an inner sealing groove is formed in the inner wall of the shear pin sleeve and is positioned above the annular boss, and an inner sealing ring is installed in the inner sealing groove;
an outer sealing groove is formed in the outer wall of the lower portion of the shear pin sleeve and located above the first shear pin hole, and an outer sealing ring is installed in the outer sealing groove.
5. The drilling-free oil removal casing pipe temporary plugging short section as claimed in claim 4, characterized in that: a pressure cap is arranged above the rupture disc;
the pressing cap is of a cylindrical structure, and the upper end of the pressing cap is provided with an outward annular flanging;
the outer wall of the lower part of the pressing cap is provided with an external thread, the inner wall of the upper part of the shear pin sleeve is provided with an internal thread, the internal thread is positioned above the internal sealing groove, and the pressing cap is connected to the upper part of the shear pin sleeve through a thread;
the upper end face of the rupture disc is in contact with the lower end face of the pressing cap, the upper end face of the pressing cap is in contact with the lower end face of the upper connector, and the lower end face of the annular flanging of the pressing cap is in contact with the upper end face of the shear pin sleeve.
6. The drilling-free oil removal casing pipe temporary plugging short section as claimed in claim 5, characterized in that: the crushing excitation mechanism includes: a shear pin and a firing pin sleeve;
the striker sleeve is of a cylindrical structure, the outer wall of the striker sleeve is of a stepped shaft structure and comprises a large-diameter section and a small-diameter section, and a striker sleeve step is formed between the large-diameter section and the small-diameter section;
a plurality of second shear pin holes are formed in the small-diameter section, and the second shear pin holes correspond to the first shear pin holes in the shear pin sleeve one by one;
the end part of the small-diameter section is provided with a plurality of firing pins, the bottom of each firing pin is connected with the end surface of the small-diameter section, and the top of each firing pin is of a sharp structure;
the firing pins on the firing pin sleeve correspond to the firing pin grooves on the shear pin sleeve one to one.
7. The drilling-free oil removing casing pipe temporary plugging short section according to claim 6, characterized in that: the inner diameter of the striker sleeve is the same as that of the annular boss on the shear pin sleeve.
8. The drilling-free oil removing casing pipe temporary plugging short section as claimed in claim 7, characterized in that: the central axis of each second shear pin hole is vertical to the central axis of the firing pin sleeve;
a plurality of second shear pin holes are evenly distributed on the circumference.
9. The drilling-free oil removal casing pipe temporary plugging nipple joint as claimed in claim 8, wherein: a lower step is arranged on the inner wall of the lower joint, and the lower end face of the striker sleeve is in contact with the lower step;
the small-diameter section of the striker sleeve is inserted into the inner cavity of the shear pin sleeve from the lower end of the shear pin sleeve, each first shear pin hole is aligned with each second shear pin hole, and each striker is positioned in each striker groove;
the shear pin sequentially passes through the first shear pin hole and the second shear pin hole to connect the shear pin sleeve and the firing pin sleeve;
a gap is arranged between the upper end surface of the striker sleeve and the lower end surface of the rupture disc, and a gap is arranged between the lower end surface of the shear pin sleeve and the step of the striker sleeve.
10. The drilling-free oil removal casing pipe temporary plugging short section as claimed in claim 1, characterized in that: the rupture disc is made of one or more layers of high-strength fragile glass or ceramic materials;
the rupture disc has a surface strength of 350MPa or greater and a single layer capable of withstanding high differential pressures of 50MPa or greater.
11. The drilling-free oil removal casing pipe temporary plugging short section as claimed in claim 1, characterized in that: the outer wall of the lower end of the upper joint is provided with an external thread, and the inner wall of the upper end of the lower joint is provided with an internal thread;
the lower end of the upper joint is inserted into the inner cavity of the upper end of the lower joint, and the upper joint and the lower joint are connected through threads;
a sealing ring is arranged on the outer wall of the lower end of the upper joint;
the inner wall of the upper end of the upper joint is provided with an internal thread, and the outer wall of the lower end of the lower joint is provided with an external thread which is respectively used for being connected with the pipe columns above and below.
12. An application method of a temporary plugging short section of a drilling-free oil removal casing pipe is characterized in that: the method comprises the following steps:
connecting the temporary plugging nipple of the drilling-free oil removal casing pipe according to any one of claims 1 to 11 in a well entering pipe string, and running the pipe into a designed depth to realize temporary plugging in the pipe;
performing construction operation in the pipe string above the temporary plugging short section of the drilling-free oil removal sleeve;
after the construction operation is finished, the pressure is continuously suppressed until the shear pin is cut off, the rupture disc rapidly descends along with the shear pin sleeve to impact the striker sleeve, the striker on the striker sleeve enables the rupture disc to be broken into fine particles, the fine particles flow out along with well drilling fluid, and then plugging is removed.
13. An application method of a temporary plugging short section of a drilling-free oil removal casing pipe is characterized in that: the method comprises the following steps:
connecting the temporary plugging nipple of the drilling-free oil removal casing pipe according to any one of claims 1 to 11 to the middle of the casing pipe to serve as a floating casing running device, and isolating upper drilling fluid through the temporary plugging nipple of the drilling-free oil removal casing pipe, so that the buoyancy of the casing pipe in the horizontal section is increased, and the running friction resistance is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110672493.3A CN115492552A (en) | 2021-06-17 | 2021-06-17 | Drilling-free oil removal casing temporary plugging nipple and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110672493.3A CN115492552A (en) | 2021-06-17 | 2021-06-17 | Drilling-free oil removal casing temporary plugging nipple and application thereof |
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| CN115492552A true CN115492552A (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110672493.3A Pending CN115492552A (en) | 2021-06-17 | 2021-06-17 | Drilling-free oil removal casing temporary plugging nipple and application thereof |
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| CN (1) | CN115492552A (en) |
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