CN118498921B - A gate front sealing assembly capable of releasing pressure when opening under pressure - Google Patents
A gate front sealing assembly capable of releasing pressure when opening under pressure Download PDFInfo
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- CN118498921B CN118498921B CN202410969144.1A CN202410969144A CN118498921B CN 118498921 B CN118498921 B CN 118498921B CN 202410969144 A CN202410969144 A CN 202410969144A CN 118498921 B CN118498921 B CN 118498921B
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- sealing
- sizing block
- pin
- hole
- colloid
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- 238000007789 sealing Methods 0.000 title claims abstract description 138
- 238000004513 sizing Methods 0.000 claims abstract description 88
- 239000000084 colloidal system Substances 0.000 claims abstract description 50
- 238000005553 drilling Methods 0.000 claims abstract description 19
- 230000033001 locomotion Effects 0.000 claims description 9
- 239000003292 glue Substances 0.000 claims description 8
- 238000004073 vulcanization Methods 0.000 claims description 4
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Classifications
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses a flashboard front sealing assembly capable of releasing pressure when being opened under pressure, which comprises a sealing colloid, wherein an arc-shaped sealing contact surface is arranged at one side end of the sealing colloid, a groove matched with a drilling tool or a pipe body is formed in the middle of one side of the sealing colloid, a first sizing block is fixed at the top of the sealing colloid, guide slotted holes are formed in the edges of two ends of the first sizing block, a second sizing block is fixed at the bottom of the sealing colloid, the second sizing block, the first sizing block and the outer contour shape of the sealing colloid are adapted, pin holes are formed in the edges of two ends of the second sizing block, two ends of a sealing pin are respectively positioned in the pin holes and the guide slotted holes on the corresponding side, a pull rod is vertically connected with the sealing pin and drives the sealing pin to move, the sealing pin moves to enable the sealing contact area of the sealing colloid and the drilling tool to be reduced, and the sealing pin is driven to move after a certain distance in the guide slotted holes.
Description
Technical Field
The invention belongs to the technical field of blowout preventer components, and particularly relates to a flashboard front sealing assembly capable of releasing pressure when being opened under pressure.
Background
In petroleum drilling, the ram blowout preventer is an important safety device in a wellhead pressure control system, and can control wellhead pressure in the processes of drilling, workover, oil test and the like, prevent accidents such as overflow, kick, blowout and the like, and realize secondary well control.
At present, in the operation processes such as well drilling, well repairing, oil testing, emergency exercise or maintenance, a blowout preventer needs to frequently switch a gate plate, in the switching process, the well bore pressure caused by various reasons is frequently met, the gate plate assembly also has great closing force due to the well pressure sealing assisting effect, the gate plate is opened at the moment, the gate plate is opened under pressure, the gate plate rubber core and the gate plate are deformed generally, the gate plate is broken by heavy accident, the front sealing pin is broken by pulling, the top sealing is cut off and other major accidents are caused, and if the gate plate assembly or parts thereof are caused to fall into the well bore, major economic loss is caused for the well drilling operation, and meanwhile, the hidden danger of safety accidents is brought.
The front seal of the flashboard refers to the seal between the front part of the flashboard and a drilling tool, and Chinese patent CN201821168758.6 discloses a front seal device of a reducing flashboard, which does not need to be replaced when a cable is replaced, but cannot complete pressure relief when the flashboard is opened, and the front seal device of the reducing flashboard is damaged when the flashboard assembly is opened.
Therefore, it is a need in the art to provide a ram front seal assembly that can relieve pressure when opened under pressure.
Disclosure of Invention
In view of the above, the invention provides a flashboard front sealing assembly capable of releasing pressure when the flashboard is opened under pressure, solves the problems of damage, breakage and part falling into a shaft of a blowout preventer caused by the pressurized opening of the blowout preventer, can release pressure before the flashboard is opened, and ensures the stability and safety of the flashboard when the flashboard starts.
In order to achieve the purpose, the invention adopts the following technical scheme that the flashboard front sealing assembly capable of releasing pressure when being opened under pressure comprises:
The sealing colloid is provided with an arc-shaped sealing contact surface at one side end, and a groove matched with a drilling tool or a pipe body is formed in the middle of one side of the sealing colloid;
The first sizing block is fixed at the top of the sealing colloid, and guide slots are formed in the edges of the two ends of the first sizing block;
The second sizing block is fixed at the bottom of the sealing colloid, the outer contour shapes of the second sizing block, the first sizing block and the sealing colloid are adapted, and the edges of the two ends of the second sizing block are provided with pin holes;
The two ends of the sealing pin are respectively positioned in the pin hole and the guide slot hole at the corresponding side;
The pull rod is vertically connected with the sealing pin and drives the sealing pin to move, the movement of the sealing pin drives the second sizing block to move, the movement of the second sizing block drives the sealing colloid to reduce the sealing contact area with the drilling tool, and the sealing pin drives the first sizing block to move after sliding for a certain distance in the guide slot hole.
The invention has the advantages that after the product is used, when the ram blowout preventer is opened under pressure, the pressure can be relieved in advance, the ram drives the top sealing pin to move backwards, the top sealing pin drives the pull rod to move backwards, the pull rod drives the sealing pin to move backwards, at the moment, the sealing pin drives the second sizing block to move backwards due to the assembly relation of the sealing pin and the pin hole on the second sizing block, the sealing pin can slide in the guiding slot for a certain distance and then drive the first sizing block to move backwards due to the guiding slot on the first sizing block, and the sealing colloid in the lower end joint state can be easily separated due to the eccentric arc sealing contact surface of the sealing colloid, so that the sealing contact surface and the sealing state of the ram rubber is damaged, the sealing failure is caused, the ram assembly can open the ram under relatively small pulling force, and the ram is safer and more stable in the opening process.
Preferably, arc sections matched with the outline shape of the drilling tool are arranged in the middle of one side of the first sizing block and the middle of one side of the second sizing block, and straight line sections matched with the empty well to be sealed are arranged at two ends of the corresponding arc sections of the first sizing block and the second sizing block.
The technical effect that produces is that have the arc section of cooperation drilling tool on first sizing block and the second sizing block, have the straightway that is used for the empty shaft to seal also, be assembled to the flashboard front end when specifically using.
Preferably, a protruding structure and a hole for enhancing connectivity with the sealing colloid are arranged on one side of the second sizing block close to the sealing colloid.
The technical effect that produces is that because the second sizing block drives the sealing colloid to move earlier, first sizing block has the relative motion process with the second sizing block, improves the intensity and the reliability that second sizing block and sealing colloid are connected through protruding structure and hole this moment.
Preferably, the protruding structure is a triangular table with a long strip shape, and the hole is a blind hole.
The triangular table can increase the connection area of the second sizing block and the sealing colloid, and the sealing colloid at the lower end is convenient to drive to move when the second sizing block moves.
Preferably, the sealing contact surface is an upwardly biased arc structure.
The technical effect that produces from this is that the partial arc structure is when sealed, and the glue volume of upper end is big, and the glue volume of lower extreme is little, and in the flashboard opening process, be favorable to the lower extreme to glue the position that the volume is little to break away first, supplementary overall structure produces the effect of sealed inefficacy, just can the pressure release open the flashboard assembly when sealed inefficacy, improves the security when flashboard is opened.
Preferably, the seal pin is of a stepped cylindrical structure, a first stepped shaft section, a second stepped shaft section, a third stepped shaft section and a fourth stepped shaft section are sequentially arranged from one end to the other end of the seal pin, the first stepped shaft section is slidably connected in the guide slot hole, the top of the second stepped shaft section is slidably sealed with the bottom end of the guide slot hole, the third stepped shaft section is connected with the pull rod, and the fourth stepped shaft section is connected with the pin hole in an adaptive manner.
The first step shaft section and the second step shaft section are respectively positioned in the guide slotted hole and the pin hole and are necessary components for sealing before opening, the second step shaft section can seal the guide slotted hole to avoid air leakage, the third step shaft section is longer, the shearing-resistant area of the sealing pin is effectively increased, and the maximum transmission tension of the pull rod and the sealing pin is improved.
Preferably, a connecting hole for connecting the top sealing pin is formed in the edge of one end of the pull rod, a connector is integrally formed in the other end of the pull rod, and a through hole matched with the third step shaft section is formed in the connector.
The connecting hole on the pull rod is matched with the top sealing pin, the top of the top sealing pin is positioned in the top sealing glue block, the bottom of the top sealing pin is connected with the flashboard body, when the flashboard body is opened, the top sealing pin drives the pull rod to move, and the pull rod drives the sealing pin to move, so that the second sizing block and the first sizing block move sequentially.
Preferably, the sealing colloid is vulcanized and fixed with the first sizing block, the second sizing block, the sealing pin and the pull rod.
The technical effect that produces from this is that the vulcanization of sealing colloid and first sizing block, second sizing block is connected can improve sealing colloid's connection quality, and sealing colloid is the rubber material.
Preferably, the guide slot hole is a kidney-shaped hole, and the long axis direction of the kidney-shaped hole corresponds to the moving direction of the pull rod.
Drawings
FIG. 1 is a block diagram of a front seal assembly of a ram that is operable to relieve pressure when opened under pressure in accordance with the present invention;
FIG. 2 is a schematic diagram of a front seal assembly of a shutter that can be depressurized when opened under pressure in accordance with the present invention;
FIG. 3 is a block diagram of a first sizing block and a second sizing block of a ram front seal assembly according to the present invention that can be depressurized when opened under pressure;
FIG. 4 is a diagram showing the cooperation of a tie rod and a seal pin of a ram front seal assembly that can be depressurized when opened under pressure in accordance with the present invention;
FIG. 5 is a cross-sectional view of a seal gel of a ram front seal assembly according to the present invention that is pressure relieved when opened under pressure;
FIG. 6 is an application view of a front seal assembly for a shutter that can be depressurized when opened under pressure in accordance with the present invention;
Fig. 7 is a sectional view A-A of fig. 6.
The sealing device comprises a sealing colloid 1, a sealing contact surface 11, a first sizing block 2, a guide slot hole 21, a arc section 22, a second sizing block 3, a pin hole 31, a convex structure 32, a hole 33, a sealing pin 4, a first step shaft section 41, a second step shaft section 42, a third step shaft section 43, a fourth step shaft section 44, a pull rod 5, a connector 51, a perforated hole 52, a connecting hole 53, a 6 flashboard body, a 7-top sealing colloid block, a 8-top sealing pin 9 drilling tool and a 10 front sealing component.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 7 of the drawings, a front seal assembly for a shutter which can release pressure when opened under pressure according to an embodiment of the present invention includes:
the sealing colloid 1, one side end of the sealing colloid 1 is provided with an arc-shaped sealing contact surface 11, and the middle part of one side of the sealing colloid 1 is provided with a groove matched with a drilling tool 9 or a tubular column;
The first sizing block 2 is fixed at the top of the sealing colloid 1, the edges of the two ends of the first sizing block 2 are provided with guide slotted holes 21, the guide slotted holes are non-round holes, the movement of the sealing pin can be guided, the relative movement resistance of the sealing pin in rubber is reduced, and the pressure of opening under pressure is further reduced;
The second sizing block 3, the second sizing block 3 is fixed at the bottom of the sealing colloid 1, the outer contour shapes of the second sizing block 3, the first sizing block 2 and the sealing colloid 1 are adapted, and the edges of the two ends of the second sizing block 3 are provided with pin holes 31;
The two ends of the sealing pin 4 are respectively positioned in the pin hole 31 and the guide slot hole 21 at the corresponding side;
And the pull rod 5 is vertically connected with the seal pin 4 and drives the seal pin 4 to move, the movement of the seal pin 4 drives the second sizing block 3 to move, the movement of the second sizing block 3 drives the sealing contact area of the sealing colloid 1 and the drilling tool to be reduced, and the seal pin 4 slides in the guide slot 21 for a certain distance and then drives the first sizing block 2 to move.
In other embodiments, the middle parts of one side of the first sizing block 2 and the second sizing block 3 are respectively provided with an arc section 22 matched with the outline shape of the drilling tool 9, and two ends of the corresponding arc sections of the first sizing block 2 and the second sizing block 3 are respectively provided with a straight line section matched with the empty well seal.
In other embodiments, the side of the second sizing block 3 near the sealing colloid 1 is provided with a protrusion structure 32 and a hole 33 for enhancing the connectivity with the sealing colloid, and the protrusion structure 32 and the hole 33 can be used alone or in combination, which can improve the connection area between the sealing colloid 1 and the second sizing block 3 and improve the connection reliability.
In other embodiments, the protruding structure 32 is a triangular table with a long strip shape, and may be a protruding structure with other shapes, for example, a long strip shape, the hole 33 is a blind hole, or a hole structure with other shapes, so as to increase the connection area between the sealing colloid and the second sizing block and further increase the connection strength between the sealing colloid and the second sizing block.
In other embodiments, the sealing contact surface 11 is an upwardly biased arc structure, unlike the conventional arc surface design, which is used to better release the sealing state between the sealing colloid and the drilling tool or the pipe body in advance when the second sizing block moves, so as to achieve the effect of pressure release in advance.
In other embodiments, the seal pin 4 has a stepped cylindrical structure, a first step shaft section 41, a second step shaft section 42, a third step shaft section 43 and a fourth step shaft section 44 are sequentially arranged from one end to the other end of the seal pin 4, the first step shaft section 41 is slidably connected in the guide slot 21, the top of the second step shaft section 42 is slidably sealed with the bottom of the guide slot 21, the third step shaft section 43 is connected with the pull rod 5, and the fourth step shaft section 44 is adaptively connected with the pin hole 31. The specific second step shaft section is shorter and similar to a gasket, and the third step shaft section is longer, so that the shearing resistance cross section area of the sealing pin can be increased, and larger tensile force can be transmitted.
In other embodiments, a connecting hole 53 for connecting the top sealing pin 8 is provided at one end edge of the pull rod 5, a connecting head 51 is integrally provided at the other end of the pull rod 5, and a through hole 52 for matching with the third step shaft section 43 is provided on the connecting head 51.
Specifically, the sealing colloid 1 is in vulcanization connection and fixation with the first sizing block 2, the second sizing block 3, the sealing pin 4 and the pull rod 5. The first sizing block and the second sizing block can be of an integrated structure or a split structure.
More specifically, the guide slot 21 is a kidney-shaped hole, and the long axis direction of the kidney-shaped hole corresponds to the moving direction of the tie rod 5.
When the ram blowout preventer is opened under pressure, the pressure in the shaft compresses the rear end surfaces of the two ram bodies, and the ram bodies are lifted upwards to help the ram rubber cores to form a compression sealing state. When the flashboard is opened, the two flashboard bodies move relatively to the rear end, at the moment, the flashboard drives the top sealing pin to move backwards, the top sealing pin drives the pull rod to move backwards, the pull rod drives the sealing pin to move backwards, the sealing pin drives the second sizing block to move backwards, meanwhile, as the first sizing block is matched with the sealing pin to form a waist-shaped slot hole, the second sizing block is firstly immobilized, the triangular step and the plurality of holes of the second sizing block are integrated with the sealing rubber body through vulcanization, the lower-end rubber is driven to move backwards, and meanwhile, due to the eccentric arc structure of the front end surface of the rubber seal, the rubber in the lower-end attaching state can be easily detached, so that the sealing area of the rubber sealing belt is reduced, the sealing state of the flashboard rubber is damaged, the sealing is disabled, and the flashboard assembly can be opened under relatively small pulling force.
For the device and the use method disclosed in the embodiments, since the device and the use method correspond to the method disclosed in the embodiments, the description is relatively simple, and the relevant places refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A gate front seal assembly that can be depressurized when opened under pressure, comprising:
The sealing colloid (1), one side end of the sealing colloid (1) is provided with an arc-shaped sealing contact surface (11), the sealing contact surface (11) is of an arc-shaped structure which is upwards inclined, and the middle part of one side of the sealing colloid (1) is provided with a groove matched with a drilling tool (9) or a pipe body;
The sealing glue comprises a sealing glue body (1), a first sizing block (2), a second sizing block (2) and a sealing glue, wherein the first sizing block (2) is fixed at the top of the sealing glue body (1), and guide slots (21) are formed in the edges of the two ends of the first sizing block (2);
the second sizing block (3), the second sizing block (3) is fixed at the bottom of the sealing colloid (1), the outer contour shapes of the second sizing block (3), the first sizing block (2) and the sealing colloid (1) are adapted, and the edges of the two ends of the second sizing block (3) are provided with pin holes (31);
the two ends of the sealing pin (4) are respectively positioned in the pin hole (31) and the guide slot hole (21) at the corresponding side;
The pull rod (5) is vertically connected with the seal pin (4) and drives the seal pin (4) to move, the movement of the seal pin (4) drives the second sizing block (3) to move, the movement of the second sizing block (3) drives the sealing contact surface of the sealing colloid (1) and the drilling tool to be reduced, and the seal pin (4) slides in the guide slot hole (21) for a certain distance and then drives the first sizing block (2) to move;
The sealing pin (4) is of a stepped cylindrical structure, a first stepped shaft section (41), a second stepped shaft section (42), a third stepped shaft section (43) and a fourth stepped shaft section (44) are sequentially arranged from one end to the other end of the sealing pin (4), the first stepped shaft section (41) is slidably connected in the guide slot hole (21), the top of the second stepped shaft section (42) is slidably sealed with the bottom end of the guide slot hole (21), the third stepped shaft section (43) is connected with the pull rod (5), the fourth stepped shaft section (44) is in adaptive connection with the pin hole (31), a connecting hole (53) for connecting the top sealing pin (8) is formed in the edge of one end of the pull rod (5), a connector (51) is integrally arranged at the other end of the pull rod (5), and a through hole (52) matched with the third stepped shaft section (43) is formed in the connector (51).
2. The flashboard front sealing assembly capable of relieving pressure when being opened under pressure according to claim 1, wherein arc sections (22) matched with the outline shape of a drilling tool (9) are arranged in the middle of one side of the first sizing block (2) and the middle of one side of the second sizing block (3), and straight line sections matched with the sealing of an empty well are arranged at two ends of the corresponding arc sections of the first sizing block (2) and the second sizing block (3).
3. The flashboard front sealing assembly capable of releasing pressure when being opened under pressure according to claim 1, wherein a convex structure (32) and a hole (33) for enhancing connectivity with the sealing colloid are arranged on one side of the second sizing block (3) close to the sealing colloid (1).
4. A shutter front seal assembly capable of releasing pressure when opened under pressure as claimed in claim 3, wherein the protruding structure (32) is a triangular table in a long shape, and the hole (33) is a blind hole.
5. The flashboard front sealing assembly capable of releasing pressure when being opened under pressure according to any one of claims 1-4, wherein the sealing colloid (1) is fixedly connected with the first sizing block (2), the second sizing block (3), the sealing pin (4) and the pull rod (5) through vulcanization.
6. The flashboard front sealing assembly capable of relieving pressure when being opened under pressure according to claim 1, wherein the guide slotted hole (21) is a kidney-shaped hole, and the long axis direction of the kidney-shaped hole corresponds to the moving direction of the pull rod (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410969144.1A CN118498921B (en) | 2024-07-19 | 2024-07-19 | A gate front sealing assembly capable of releasing pressure when opening under pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410969144.1A CN118498921B (en) | 2024-07-19 | 2024-07-19 | A gate front sealing assembly capable of releasing pressure when opening under pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118498921A CN118498921A (en) | 2024-08-16 |
| CN118498921B true CN118498921B (en) | 2024-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410969144.1A Active CN118498921B (en) | 2024-07-19 | 2024-07-19 | A gate front sealing assembly capable of releasing pressure when opening under pressure |
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| Country | Link |
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| CN (1) | CN118498921B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5944110A (en) * | 1997-09-11 | 1999-08-31 | Cooper Cameron Corporation | Variable bore ram packer for a ram type blowout preventer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4456215A (en) * | 1982-05-07 | 1984-06-26 | Bowen Tools, Inc. | Inner seal and support rod assembly for high pressure blowout preventers |
| US4444404A (en) * | 1982-10-19 | 1984-04-24 | Hydril Company | Variable bore ram packing element and blowout preventer |
| CN104295260B (en) * | 2014-10-13 | 2017-01-11 | 重庆中重石油机械有限公司 | Reducing suction blowout preventer |
| CN109931023B (en) * | 2019-04-08 | 2021-03-19 | 王玉涛 | Blowout preventer for submarine oil and gas exploitation |
| CN110080711A (en) * | 2019-05-27 | 2019-08-02 | 河北博路天宝石油设备制造有限公司 | A kind of ram preventer with combined type side door |
-
2024
- 2024-07-19 CN CN202410969144.1A patent/CN118498921B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5944110A (en) * | 1997-09-11 | 1999-08-31 | Cooper Cameron Corporation | Variable bore ram packer for a ram type blowout preventer |
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| Publication number | Publication date |
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| CN118498921A (en) | 2024-08-16 |
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