CN215860076U - Top is driven and is used interior preventer - Google Patents
Top is driven and is used interior preventer Download PDFInfo
- Publication number
- CN215860076U CN215860076U CN202122290945.XU CN202122290945U CN215860076U CN 215860076 U CN215860076 U CN 215860076U CN 202122290945 U CN202122290945 U CN 202122290945U CN 215860076 U CN215860076 U CN 215860076U
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- Prior art keywords
- valve seat
- valve body
- blowout preventer
- top drive
- floating ball
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- 238000007667 floating Methods 0.000 claims abstract description 37
- 239000004519 grease Substances 0.000 claims abstract description 25
- 230000001050 lubricating effect Effects 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 18
- 239000010949 copper Substances 0.000 claims description 18
- 238000012856 packing Methods 0.000 claims description 14
- 238000013016 damping Methods 0.000 abstract description 8
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 12
- 239000012530 fluid Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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Abstract
The utility model relates to an internal blowout preventer for top drive, which comprises a valve body, wherein a safety valve seat is arranged in the valve body, and an operation crank assembly and a lubricating grease filling channel are also arranged on the valve body; the lubricating grease filling channel is a T-shaped channel. The utility model adopts a compensation structure of a symmetrical floating valve seat, and the contact surface of the valve seat and the floating ball adopts molding soft seal, thereby solving the problem that the floating ball of the existing internal blowout preventer is deformed under high load and the friction damping between the floating ball and the valve seat is too large, so that the internal blowout preventer can not be opened reliably during well control operation, prolonging the service life and enhancing the safety performance; the problem of current top drive with internal blowout preventer structure open the moment of torsion under unilateral pressure 30MPa and higher pressure too big, single manpower can't open is solved.
Description
Technical Field
The utility model relates to the field of safety valves in high-pressure drilling fluid channels for petroleum and natural gas drilling, in particular to an internal blowout preventer applied to a petroleum drilling faucet or a top drive.
Background
The inner blowout preventer is an important component of the top drive, is connected between the top drive main shaft and the protective joint, and can block an inner channel of a drill string by closing the inner blowout preventer, so that drilling fluid is prevented from gushing to a drilling surface through the inner channel of the drill string during well kick or blowout. The pair of inner blowout preventers are arranged between the lower end of the top drive main shaft and the protective joint, the upper inner blowout preventers are hydraulically driven, the lower inner blowout preventers are manually operated, when well control operation occurs, the upper inner blowout preventers are remotely closed, then the lower inner blowout preventers are manually closed, and after well control equipment is connected, the lower inner blowout preventers are opened to perform well control operation. And after the well control operation is finished, closing the lower inner blowout preventer, removing the well control equipment, and recovering the normal well drilling operation.
Due to the working property and the severe working environment of the internal blowout preventer, the internal blowout preventer is easy to break down or fail, which affects the operation slightly and causes serious safety accidents seriously. In order to ensure the safety of drilling operation, the internal blowout preventer must be replaced after being used for a period of time, so the demand of domestic markets for internal blowout preventer products is large. The inner blowout preventer product used in the offshore oil drilling operation at present has the problems of deformation of a valve core under high pressure, large opening and closing torque caused by differential pressure on two sides after a ball valve is closed, difficulty in opening, easiness in corrosion of a valve body and a valve seat, sealing failure, even valve body failure and the like, and the time efficiency and safety of well control operation are seriously affected. The demand of the domestic market for high-performance internal blowout preventer products is very urgent. Therefore, it is necessary to develop research on new materials, new equipment and new technologies related to offshore oil drilling and production to solve the problem that the performance of the existing products is insufficient and the well control safety is affected.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In order to solve the problems in the prior art, the utility model provides an internal blowout preventer for top drive, which solves the problems that the valve core of the conventional internal blowout preventer deforms under high pressure, the internal blowout preventer cannot be reliably opened when the pressure difference between two ends is large due to overlarge friction coefficient of the sealing surface, a steel valve body and a valve seat are easily corroded by hydrogen sulfide overflowing from the stratum, and the sealing is failed even the valve body is failed due to the flushing of high-pressure drilling fluid.
(II) technical scheme
In order to achieve the purpose, the utility model adopts the main technical scheme that:
an internal blowout preventer for top drive comprises a valve body,
a safety valve seat is arranged in the valve body and comprises an upper valve seat, a floating ball, a lower valve seat and a valve seat thrust ring;
the contact surfaces of the floating ball and the upper valve seat and the lower valve seat are provided with formed packing seal rings;
the valve body is also provided with an operating crank assembly, and the operating crank assembly comprises an operating crank, a gasket and a copper sleeve;
the valve body is also provided with a lubricating grease filling channel;
the lubricating grease filling channel is a T-shaped channel.
The formed packing seal ring changes the sealing form of the valve seat and the floating ball, and is used for improving the sealing property and isolating the contact between the upper valve seat and the lower valve seat and the spherical surface of the floating ball, so that the friction damping between the valve seat and the floating ball is reduced; the gasket arranged on the contact end face of the operating crank and the copper sleeve greatly reduces the opening torque of the internal blowout preventer; the valve seat thrust collar is connected with the valve body through threads, and the idle load torque for opening the internal blowout preventer can be adjusted by screwing the valve seat thrust collar in and out.
The upper, float and lower valve seats each have a central passage that are axially aligned with each other and with the passages of the valve body.
Optionally, the contact position of the upper valve seat and the valve seat thrust collar and the contact position of the lower valve seat and the valve body are both provided with a wave spring, the compensation structure adopts a combination mode of 'symmetrical floating valve seats', initial pre-tightening sealing specific pressure is provided through the wave springs, form and position tolerance of parts is improved, and product quality is improved.
The upper valve seat and the lower valve seat are both of cylindrical structures with outer flanges at one ends.
And the contact surfaces of the upper valve seat, the lower valve seat and the floating ball are provided with accommodating grooves.
The copper sheathing is the drum structure, and its bottom has the outward flange, and the outside is provided with and is used for installing sealed inner groovy, inner groovy department is placed the sealing washer and is used for operating the sealed of crank assembly and valve body.
The operation crank is of a crank structure with an inner hexagonal hole in the upper portion, an outer flange is arranged at the bottom of the operation crank, an inner groove is formed in the operation crank, and a braking platform is arranged at the bottom of the operation crank.
The one end that the operation crank does not have the outward flange imbeds the inside of copper sheathing, has placed the sealing washer in the inside inner groovy department of operation crank, the packing ring sets up the contact position at operation crank outward flange and copper sheathing outward flange.
The valve body is provided with a clamping ring which is used for pre-tightening and looseness prevention and preventing the valve seat thrust ring from retreating.
The valve body is also provided with a lubricating grease filling channel, the lubricating grease filling channel is communicated with the cavity where the wave spring is located, lubricating grease is injected into the wave spring through the lubricating grease filling channel to lubricate the wave spring, and penetrated drilling fluid and other impurities can be pushed out of the lower valve seat wave spring installation cavity.
And the lubricating grease filling channel opening is also provided with a sealing plug for plugging lubricating grease.
The increase of interior preventer valve body substrate thickness has promoted the structural strength and the life of valve body by a wide margin, has effectively reduced the harm risk that valve body stress groove fracture etc. are unfavorable for product itself and personnel's safety.
The bidirectional sealing mode is changed into front sealing of the valve, and the safety valve seat still has the capability of back sealing of the valve, namely, one sealing is added; when the internal blowout preventer is closed, no pressure enters the floating ball, so that no load pressure exists on the end faces of the operating crank and the copper sleeve, and the opening torque of the internal blowout preventer when the internal blowout preventer is opened is reduced.
The floating ball is made of high-strength stainless steel or composite ceramic materials, so that the hardness and the bearing strength of the ball body are guaranteed, the ball body is prevented from being greatly deformed under high pressure, a composite material coating is coated on the surface, and the working condition scenes such as high temperature, high pressure, strong corrosion and the like are met.
The structure of the operation crank is changed, the gasket is additionally arranged between the operation crank and the copper sleeve, the opening torque is reduced, and the problem that the internal blowout preventer cannot be opened by a single person when the pressure difference on one side of the internal blowout preventer is 30MPa or more is solved.
(III) advantageous effects
The utility model has the beneficial effects that:
the utility model adopts a compensation structure of a symmetrical floating valve seat, the contact surface of the valve seat and the floating ball 4 adopts a formed soft seal, replaces the hard seal form of the metal spherical surface contact of the traditional internal blowout preventer, reduces the friction and the abrasion, improves the reliability of the seal, optimizes the operation crank structure, reduces the local stress, optimizes the fluid dynamics of the valve seat structure and reduces the scouring of the medium to the valve body 1. The problem of current interior preventer under high load the floater produce deformation, floater and disk seat frictional damping too big bring interior preventer can't reliably open when well control operation is solved, improve working life, strengthened the security performance. The inner blowout preventer mainly solves the industrial problems that the existing inner blowout preventer structure has overlarge opening torque under the unilateral pressure of 30MPa and higher pressure and can not be opened by single man power.
Drawings
FIG. 1 is a schematic diagram of the configuration of an upper internal blowout preventer of the present invention;
FIG. 2 is a schematic view of the lower internal blowout preventer profile of the present invention;
FIG. 3 is a schematic structural cross-sectional view of an upper internal blow out preventer of the present invention;
FIG. 4 is a schematic structural cross-sectional view of a relief valve seat of the internal blow out preventer of the present invention;
FIG. 5 is a schematic structural cross-sectional view of an operating crank assembly of the internal blow out preventer of the present invention.
[ description of reference ]
1: a valve body;
2: a valve seat thrust ring;
3: an upper valve seat;
4: a floating ball;
5: a lower valve seat;
6: operating a crank;
7: forming a packing seal ring;
8: a gasket;
9: a copper sleeve;
10: a wave spring;
11: a snap ring;
12: sealing the plug;
13: a seal ring;
14: and (5) sealing rings.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
Example (b):
as shown in fig. 1 and 2, the upper internal blowout preventer and the lower internal blowout preventer are in the same shape and structure, the upper internal blowout preventer is opened remotely on an opening device outside a valve body, a set of hydraulic pushing device is specially arranged on a top drive and used for opening and closing the upper internal blowout preventer, the lower internal blowout preventer is opened manually, an external hexagonal torque wrench with a force arm of 1 meter is generally matched, the external hexagonal torque wrench is nested with an internal hexagonal hole on an operating crank, the external hexagonal torque wrench is rotated to drive the operating crank to rotate, an actuating platform on the operating crank is matched with an actuating groove on a floating ball, and the floating ball is driven to rotate during rotation, so that manual opening and closing operation is realized.
As shown in fig. 3, the upper internal blowout preventer comprises a valve body 1 with a tubular passage, and a valve seat thrust ring 2, an upper valve seat 3, a floating ball 4, a lower valve seat 5, an operating crank 6, a formed packing seal ring 7, a gasket 8, a copper sleeve 9, a wave spring 10, a snap ring 11 and a sealing plug 12 are arranged in the valve body 1.
An upper valve seat 3 and a lower valve seat 5 are arranged in a channel of the valve body 1, the upper valve seat 3 and the lower valve seat 5 are both of a cylindrical structure with an outer flange at one end, a floating ball 4 is rotatably accommodated between the upper valve seat 3 and the lower valve seat 5, one ends of the upper valve seat 3 and the lower valve seat 5 with the outer flanges are in contact with the floating ball 4, the upper valve seat 3, the floating ball 4 and the lower valve seat 5 are respectively provided with a central channel, the central channels are aligned with each other along the axial direction and are aligned with a tubular channel of the valve body 1, the top and the bottom of the floating ball 4 are respectively provided with a braking groove, and an operating crank mounting hole is further formed in the valve body 1.
As shown in fig. 4, the floating ball 4 is positioned with the upper valve seat 3 and the lower valve seat 5 in the above manner, the floating ball 4 has a left contact surface and a right contact surface, the right contact surface contacts with the upper valve seat 3, the left contact surface contacts with the lower valve seat 5, the contact positions of the upper valve seat 3, the lower valve seat 5 and the floating ball 4 are all provided with a containing groove, each contact surface is sleeved with a formed packing seal ring 7, the formed packing seal ring 7 is embedded in the containing groove, and the formed packing seal ring 7 is used for improving the sealing performance and isolating the contact between the upper valve seat 3 and the spherical surface of the floating ball 4, so as to reduce the opening damping. The common internal blowout preventer adopts the sealing after the mutual grinding of the spherical surface and the cambered surface of the valve seat, the opening torque needs about 2000 N.m when the single-side pressure is 30MPa, the ball valve of the internal blowout preventer adopts the soft sealing of the formed packing sealing ring, the friction damping between the floating ball 4 and the valve seat is greatly reduced, when the single-side pressure is 30MPa, the opening torque can be controlled below 500 N.m, and the opening torque of the internal blowout preventer is effectively reduced.
The right side of the upper valve seat 3 is also provided with a valve seat thrust ring 2, one end, without an outer flange, of the upper valve seat 3 is embedded into the valve seat thrust ring 2, the valve seat thrust ring 2 is in threaded connection with the valve body 1, and the no-load torque for opening the inner blowout preventer can be adjusted by screwing the valve seat thrust ring 2 out.
As shown in fig. 3, the waveform springs 10 are arranged at the contact position of the upper valve seat 3 and the valve seat thrust ring 2 and the contact position of the lower valve seat 5 and the valve body 1, and the waveform springs 10 provide initial pre-tightening sealing specific pressure to improve the form and position tolerance of parts and improve the product quality.
As shown in fig. 3 and 5, the copper sleeve 9 is a cylindrical structure, an outer flange is provided at the bottom of the copper sleeve, an inner groove is provided at the outside of the copper sleeve, and a sealing ring 14 is placed at the inner groove for operating the sealing between the crank assembly and the valve body 1.
The operating crank 6 is of a crank structure with an inner hexagonal hole at the upper part, an outer flange is arranged at the bottom of the operating crank, an inner groove is formed inside the operating crank, and a braking platform is arranged at the bottom of the operating crank.
The one end that operation crank 6 does not have the outward flange imbeds the inside of copper sheathing 9, assembles into a subassembly, has placed sealing washer 13 in the inside inner groovy department of operation crank 6, and sealing washer 13 is used for the sealed of operation crank assembly, packing ring 8 sets up the contact position at operation crank 6 outward flange and copper sheathing 9 outward flange, and packing ring 8 is very big has reduced the damping of opening of interior preventer.
As shown in fig. 3, a snap ring 11 is further arranged on the valve body 1 of the internal blowout preventer, the snap ring 11 is arranged on the rightmost side of the valve seat thrust ring 2 and is clamped with the valve seat thrust ring 2, the snap ring 11 is used for pre-tightening and loosening prevention to prevent the valve seat thrust ring 2 from retreating, a lubricating grease filling channel is further arranged on the valve body 1, the lubricating grease filling channel is a T-shaped channel, the lubricating grease filling channel is communicated with a cavity where the wave spring 10 is located, lubricating grease is filled through the lubricating grease filling channel to lubricate the wave spring 10, drilling fluid permeating into a drill string channel can be pushed out to prevent the wave spring from being rusted and losing elasticity, a sealing plug 12 is further arranged on the valve body 1, and the sealing plug 12 is used for plugging the lubricating grease filling channel.
The surfaces of the floating ball 4, the upper valve seat 3 and the lower valve seat 5 are all coated with special material antifriction coatings, so that the friction damping between the valve seats and the floating ball 4 is reduced.
The components of the upper valve seat 3, the lower valve seat 5, the valve seat thrust ring 2, the operating crank 6 and the like all comprise matched sealing assembly structures.
The utility model adopts a compensation structure of a symmetrical floating valve seat, the contact surface of the valve seat and the floating ball 4 adopts a formed soft seal, replaces the hard seal form of the metal spherical surface contact of the traditional internal blowout preventer, reduces the friction and the abrasion, improves the reliability of the seal, optimizes the operation crank structure, reduces the local stress, optimizes the fluid dynamics of the valve seat structure and reduces the scouring of the medium to the valve body 1. The problem of current internal blowout preventer under high load floater 4 produce deformation, floater 4 and disk seat frictional damping too big bring internal blowout preventer can't reliably open when well control operation is solved, improve working life, strengthened the security performance. The inner blowout preventer mainly solves the industrial problems that the existing inner blowout preventer structure has overlarge opening torque under the unilateral pressure of 30MPa and higher pressure and can not be opened by single man power.
A method of installing the internal blow out preventer, comprising:
fixing the valve body 1;
installing the formed packing seal ring 7 in an accommodating groove of the lower valve seat 5, adhering the wave spring 10 and the lower valve seat 5 together by using grease to form an assembly, and installing the assembly into the valve body 1;
sleeving an operating crank 6 into a copper sleeve 9, arranging a gasket 8 at the contact part of the operating crank 6 and the copper sleeve 9 to form an assembly, and installing the assembly into an operating crank installing hole on a valve body 1;
adjusting an actuating platform of the operating crank 6, corresponding to an actuating groove of the floating ball 4, and installing the floating ball 4 into the valve body 1 along the concave-convex platform;
installing the formed packing seal ring 7 in an accommodating groove of the upper valve seat 3, adhering the wave spring 10 and the upper valve seat 3 together by using grease to form an assembly, and installing the assembly into the valve body 1;
screwing the valve seat thrust ring 2 along the thread, installing a snap ring 11, and adjusting the open no-load torque of the internal blowout preventer by screwing the upper valve body thrust ring 2 out;
after the installation is completed, the lubricating grease filling channel at the position of the sealing plug 12 is filled with lubricating grease, the sealing plug 12 is pre-tightened, and the installation is completed.
As described above, the present invention can be preferably realized.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the utility model, and that such changes and modifications are to be considered as within the scope of the utility model.
Claims (8)
1. An internal blowout preventer for top drive, which comprises a valve body (1) and is characterized in that,
a safety valve seat is arranged in the valve body (1), and comprises an upper valve seat (3), a floating ball (4), a lower valve seat (5) and a valve seat thrust ring (2);
the contact surfaces of the floating ball (4) and the upper valve seat (3) and the lower valve seat (5) are provided with formed packing seal rings (7);
the valve body (1) is also provided with an operating crank assembly, and the operating crank assembly comprises an operating crank (6), a gasket (8) and a copper sleeve (9);
the valve body (1) is also provided with a lubricating grease filling channel;
the lubricating grease filling channel is a T-shaped channel.
2. A top drive internal blow out preventer according to claim 1, characterized in that the wave spring (10) is arranged at the contact position of the upper valve seat (3) and the valve seat thrust ring (2) and at the contact position of the lower valve seat (5) and the valve body (1).
3. A top drive internal blow out preventer according to claim 1, wherein the upper (3) and lower (5) valve seats are each of a cylindrical configuration with an external flange at one end.
4. A top drive internal blow out preventer according to claim 3, wherein the contact surfaces of the upper valve seat (3), the lower valve seat (5) and the floating ball (4) are provided with accommodating grooves.
5. A top drive internal blow out preventer according to claim 1, characterized in that the gasket (8) is arranged at the contact point of the operating crank (6) and the copper sleeve (9).
6. A top drive internal blow out preventer according to claim 1, wherein the valve body (1) is further provided with a snap ring (11), the snap ring (11) being arranged at the rightmost side of the valve seat thrust ring (2) and engaging with the valve seat thrust ring (2).
7. A top drive internal blow out preventer according to claim 2, wherein the grease filling channel on the valve body (1) communicates with the cavity in which the wave spring (10) is located.
8. A top drive internal blow out preventer according to claim 7, wherein the grease filling passage on the valve body (1) is provided with a sealing plug (12) for plugging the grease filling passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122290945.XU CN215860076U (en) | 2021-09-22 | 2021-09-22 | Top is driven and is used interior preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122290945.XU CN215860076U (en) | 2021-09-22 | 2021-09-22 | Top is driven and is used interior preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215860076U true CN215860076U (en) | 2022-02-18 |
Family
ID=80255581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122290945.XU Active CN215860076U (en) | 2021-09-22 | 2021-09-22 | Top is driven and is used interior preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215860076U (en) |
-
2021
- 2021-09-22 CN CN202122290945.XU patent/CN215860076U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Room 1101, block a, AVIC Plaza, No. 15, Ronghua South Road, economic and Technological Development Zone, Daxing District, Beijing 100176 Patentee after: Beijing Jiejie West Technology Co.,Ltd. Address before: Room 1101, block a, AVIC Plaza, No. 15, Ronghua South Road, economic and Technological Development Zone, Daxing District, Beijing 100176 Patentee before: Beijing Jiejiexi Petroleum Equipment Co.,Ltd. |
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| CP03 | Change of name, title or address |