CN113898311A - Blowout preventer stack for workover rig - Google Patents
Blowout preventer stack for workover rig Download PDFInfo
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- CN113898311A CN113898311A CN202111214659.3A CN202111214659A CN113898311A CN 113898311 A CN113898311 A CN 113898311A CN 202111214659 A CN202111214659 A CN 202111214659A CN 113898311 A CN113898311 A CN 113898311A
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- 238000007789 sealing Methods 0.000 claims abstract description 187
- 238000002347 injection Methods 0.000 claims description 36
- 239000007924 injection Substances 0.000 claims description 36
- 239000012528 membrane Substances 0.000 claims description 25
- 238000003825 pressing Methods 0.000 claims description 24
- 238000004140 cleaning Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 22
- 239000003292 glue Substances 0.000 description 16
- 230000009471 action Effects 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 7
- 239000003129 oil well Substances 0.000 description 7
- 239000004575 stone Substances 0.000 description 7
- 230000005489 elastic deformation Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 239000013013 elastic material Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 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
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
- 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
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention belongs to the field of oil exploitation, and particularly relates to a blowout preventer stack for a workover rig, which comprises a ram blowout preventer body, an annular blowout preventer shell and an annular rubber core, wherein the ram blowout preventer body is provided with a plurality of annular rubber cores; the top of the ram blowout preventer body is fixedly connected with an annular blowout preventer shell; an annular rubber core and a sealing block are arranged inside the annular blowout preventer shell, and the sealing block is positioned at the top of the annular rubber core; a first piston is arranged at the bottom of the annular rubber core; a second piston is arranged at the bottom of the sealing block; the invention keeps the annular rubber core, so that the annular rubber core can play a role of sealing and shielding, basically prevents the blowout object from being continuously led into the position of the sealing block, controls the sealing of the sealing block when the blowout state is stopped, ensures that the sealing surface position of the sealing block can not be clamped with a large amount of foreign matters to influence the sealing effect, and ensures the strength of the sealing structure by sealing through the hard sealing block, thereby realizing the continuous sealing effect.
Description
Technical Field
The invention belongs to the field of oil exploitation, and particularly relates to a blowout preventer stack for a workover rig.
Background
The blowout preventer is used for closing a well mouth in the operation processes of oil testing, well repairing, well completion and the like to prevent blowout accidents, is a well mouth safety sealing device commonly used in oil fields to prevent blowout, is usually provided with a large gate of a gate plate type blowout preventer, can form a sealed annular space between a pipe column and a shaft during operation, and can independently complete well shut-in under the condition that the pipe column is arranged in the well.
A chinese patent with application number CN113250640A discloses an annular blowout preventer, wherein a rotating sleeve is movably mounted at the bottom of a housing, a rubber core is movably mounted at the top of a supporting cylinder inside the housing, a piston is movably mounted at the bottom of the outer ring of the supporting cylinder and the rubber core inside the housing, an oil pressure regulating groove is formed in the middle of the inner wall of the housing, an oil pumping plug is movably sleeved at the bottom of the oil pressure regulating groove, a hydraulic ring groove is formed in the bottom of the inner wall of the housing, a rubber plug is movably sleeved at the inner ring of the hydraulic ring groove, a guide wheel is movably sleeved inside a contraction groove, cams are fixedly mounted at two sides of the guide wheel, hydraulic regulating cavities are formed in the two sides of the inner wall of the housing at the bottom of the hydraulic regulating groove, a push rod is movably sleeved inside the hydraulic regulating cavities, hydraulic cavities are symmetrically formed in the front and back of the inner wall of the housing, and small damage to the rubber core in the blowout preventer is ensured through the cooperation of the housing structure, the inner guide wheel and the rubber plug, the working efficiency when the drill rod is pulled up and down is improved.
In the prior art, in a blowout preventer group, by combining a ram blowout preventer and an annular blowout preventer, the annular blowout preventer can completely close an oil well wellhead and is the last barrier for blowout of the wellhead, but the interior of the existing annular blowout preventer is sealed by deformation of an elastic annular rubber core, so that the use frequency is limited, and the long-term shut-in use is not allowed.
Therefore, the invention provides a blowout preventer stack for a workover rig.
Disclosure of Invention
To remedy the deficiencies of the prior art, at least one of the technical problems set forth in the background is addressed.
The technical scheme adopted by the invention for solving the technical problems is as follows: the blowout preventer stack for the workover rig comprises a ram blowout preventer body, an annular blowout preventer shell and an annular rubber core, wherein the ram blowout preventer body is provided with a plurality of annular rubber cores; the top of the ram blowout preventer body is fixedly connected with an annular blowout preventer shell, and the annular blowout preventer shell is designed into an annular structure; a first sealing groove is formed in the annular blowout preventer shell; a first piston is connected inside the first sealing groove in a sliding manner; the top of the first piston is provided with an annular rubber core; a second sealing groove is formed in the annular blowout preventer shell at the top of the first piston; a second piston is connected inside the second sealing groove in a sliding manner; the inside of the second sealing groove is connected with sealing blocks at the top of the second piston in a sliding manner, and the sealing blocks are uniformly distributed along the ring shape; an annular guide block is fixedly connected to the bottom of the sealing block in the second sealing groove; the top surface of the annular guide block is provided with a guide groove; the bottom surface of the sealing block is fixedly connected with a guide plate, and springs are fixedly connected between the guide plate and the side surfaces of the guide groove; when the device works and the blowout problem of an oil well occurs, firstly, the body of the ram blowout preventer is enabled to preliminarily seal the oil well by controlling the hydraulic source, meanwhile, the first piston is enabled to move upwards by controlling the hydraulic source, the first piston can drive the annular rubber core to shrink, the annular rubber core and an oil pipe at the position of the well mouth are extruded together to realize the sealing of the well mouth, then the second piston is controlled to move upwards by hydraulic force, the second piston can drive the sealing blocks which are uniformly arranged to move synchronously, the sealing blocks which are uniformly distributed in the annular direction are combined together to realize the sealing of the well mouth, then the second piston is controlled to move downwards to reset and open the annular rubber core, the annular rubber core is prevented from keeping a long-term continuous sealing state, the annular rubber core is reserved by the device, the annular rubber core can play a sealing and shielding role, and the blowout object is basically prevented from being continuously led into the position of the sealing block, when stopping the blowout state, the sealed piece of control is sealed again, has guaranteed that the sealed face position of sealed piece can not block in a large number into the foreign matter, influences sealed effect, seals through the sealed piece of stereoplasm, guarantees seal structure's intensity, consequently can realize lasting sealed effect.
Preferably, the top of the annular rubber core is fixedly connected with a first pressing sheet; the surface of the first pressing sheet is provided with an inclined hole; the top surface of the first pressing piece is fixedly connected with a baffle at the inclined hole position; the during operation, through setting up first preforming, when the contact is sealed between core and the oil pipe is glued to the annular, the first briquetting at core top is glued to the annular also can be with oil pipe seal contact, if the sealed face card of core is glued to the annular is gone into when the foreign matter, the blowout thing can upwards spout through the clearance, under the sheltering from of first preforming, the blowout thing can upwards derive through the inclined hole, then rethread baffle is towards dispersion blowout thing all around, avoid blowout thing direct in a large number to sealed piece, when making sealed piece sealed, the sealed face card of sealed piece goes into the foreign matter in a large number, influence sealed effect.
Preferably, the bottom of the sealing block is fixedly connected with a second pressing piece; the surface of the second pressing sheet is provided with a through hole; a first filter screen is fixedly connected inside the through hole; the during operation, through setting up the second preforming, it is great to glue core card income foreign matter as the annular, glue core and inclined hole through the annular and upwards rush out when the blowout thing is more, the foreign matter piles up fast in the below of sealed piece, and finally leading-in sealed piece position, contact fast between second preforming and the oil pipe through sealed piece bottom, filter through the first filter screen in second preforming surface simultaneously, make the foreign matter can obtain basic filtration, the leading-in position between sealed piece and the oil pipe of stone has been avoided, finally realize totally enclosed along with folding up of sealed piece, because the second preforming has elastic deformation ability, can guarantee sealed piece before sealed, its bottom just forms basic sheltering from the protective screen fast.
Preferably, the side surface of one side of each sealing block is fixedly connected with a top block; the side face of the sealing block, which is opposite to one side face of the top block, is provided with a top groove; the side surface of the sealing block is fixedly connected with a sealing pad at the position close to the top surface and the bottom surface of the sealing block; during operation, through setting up the kicking block, when gathering together between two adjacent sealed pieces, insert through the kicking block and correspond the apical groove for the blowout thing reduces or obtains complete control, then draws close along with two sealed pieces further, and it is sealed to correspond sealed the pad and contact again, has guaranteed can not block in a large amount between the sealed piece and has gone into the foreign matter problem, improves sealed effect.
Preferably, the cross section of each jacking block is designed into a triangular structure, and the tips of the jacking blocks face to the corresponding jacking grooves; the inner parts of the top grooves are fixedly connected with connecting blocks; a pressure regulating groove is formed in the connecting block; the side surface of one side of the connecting block, which corresponds to the corresponding ejecting block, is provided with a sealing port; the section of the connecting block is designed into a paired spiral structure at the position of the sealing port; the during operation, through setting up the connecting block, and offer seal and oral area helical structure design to the surface of connecting block, under helical structure's elastic action when the seal, be in encapsulated situation, when the kicking block inserts the seal, the connecting block warp the indent, the internal pressure increase of adjustment tank this moment, sealed effect between connecting block and the kicking block is better, when stopping sealing, the kicking block pulls out the seal, under the elastic action of connecting block self, the whole outer hunch-up of seal position structure, the soil stone piece card has been avoided going into the seal, the influence is sealed.
Preferably, the side face of the top block, which is opposite to one side face of the corresponding connecting block, is provided with a jet hole, and the jet hole is externally connected with a pressure water source; during operation, through setting up the orifice, insert the inside back of connecting block when the kicking block, through the inside guide-in water of the pressure regulating tank of control orifice facing the connecting block, the increase of interior pressure of connecting block, and then promote the sealed effect between connecting block and the kicking block.
Preferably, the connecting block and the surface of the corresponding sealing block are provided with cleaning holes together, and the cleaning holes are positioned close to the sealing gasket; the inner parts of the cleaning holes are fixedly connected with second filter screens; during operation, through setting up the cleaning hole, after the inside water pressure increase of connecting block, water can be through the cleaning hole blowout, can wash sealed the pad through the cleaning hole, before guaranteeing to seal up the contact seal in pairs, sealed sealing surface who fills up does not have a large amount of foreign matters.
Preferably, the surface of one of the sealing gaskets is provided with a connecting groove, and the cross section of the connecting groove is designed into a spherical structure; the surface of the other corresponding sealing gasket is fixedly connected with a connecting plate relative to the connecting groove, and the volume of the connecting groove is larger than that of the connecting plate; during operation, through setting up the connecting plate, when two sealed relative motion that fill up, inside the connecting plate on the sealed pad surface of one side can insert the sealed spread groove on the sealed pad surface of opposite side, because sealed pad is the elastic material design, be sealed state under the oral area initial condition of spread groove, receive the automatic opening of extrusion back elastic deformation, guaranteed that the inside of spread groove can not lead into a large amount of foreign matters.
Preferably, the position, close to the connecting groove, inside the sealing gasket is provided with an injection groove; the injection groove is internally and fixedly connected with an injection plate; the surface of the injection plate is provided with injection holes, and the injection holes are externally connected with a rubber box through pipelines; during operation, through the arrangement of the injection plate, when a small amount of blowout objects are still sprayed after sealing, glue is injected into the inside of the connecting groove through the injection plate, the gap between the connecting groove and the connecting plate is completely sealed, and the special disposal requirement under emergency is met.
Preferably, a connecting hole is formed between the injection groove and the connecting groove, and a sealing plug is fixedly connected inside the connecting hole; the surface of the injection plate is fixedly connected with an elastic membrane; the surface of the elastic membrane is fixedly connected with an injection head at the position of the sealing plug; a flow hole is formed between the injection head and the elastic membrane; the surface of the injection plate is fixedly connected with a control block, and the control block is connected to the inside of the corresponding flow hole in a sliding manner; the during operation, through setting up the elastic membrane, when leading-in glue through the notes hole, at first glue can promote the seal membrane inflation, the seal membrane can drive the notes head and remove, can release even hole with the sealing plug through annotating the head, make even hole automatic open, simultaneously the seal membrane is abundant after the inflation, the control block and the discharge orifice separation of fixed state, the discharge orifice switches on automatically, the inside glue of seal membrane can pour into the spread groove fast this moment into, the realization is to the inside quick packing of spread groove, and then the realization is to two sealed abundant sealings between the pad.
The invention has the following beneficial effects:
1. according to the blowout preventer unit for the workover rig, the flashboard blowout preventer body, the annular blowout preventer shell and the annular rubber core are arranged, the annular rubber core is controlled to be sealed through the first piston, then the sealing block is controlled to be sealed in a combined mode through the second piston, the annular rubber core is reserved, the annular rubber core can play a role in sealing and shielding, well blowout objects are basically prevented from being continuously led into the position of the sealing block, the sealing block is controlled to be sealed when the well blowout state is stopped, the sealing surface position of the sealing block is guaranteed not to be clamped with a large number of foreign matters, the sealing effect is affected, the sealing block is sealed through the hard sealing block, the strength of the sealing structure is guaranteed, and therefore the continuous sealing effect can be achieved.
2. According to the blowout preventer unit for the workover rig, the jacking block and the connecting block are arranged, the spiral structure design of the sealing port and the opening is formed in the surface of the connecting block, the sealing port is in a sealing state under the elastic action of the spiral structure, the connecting block deforms and is concave inwards when the jacking block is inserted into the sealing port, the internal pressure of the adjusting groove is increased, the sealing effect between the connecting block and the jacking block is better, when sealing is stopped, the jacking block is pulled out of the sealing port, and the sealing port is integrally arched outwards under the elastic action of the connecting block, so that soil and stone blocks are prevented from being clamped into the sealing port to influence sealing.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a perspective view of an annular blowout preventer housing of the present invention;
FIG. 3 is a cross-sectional view of an annular blowout preventer housing of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is an enlarged view of a portion of FIG. 3 at B;
FIG. 6 is a schematic structural view showing a sealing state between the sealing blocks according to the present invention;
FIG. 7 is a schematic structural view showing an unconnected state of the top block and the connection block of the present invention;
FIG. 8 is a schematic structural view showing a state of connection between gaskets of the present invention;
in the figure: the ram blowout preventer comprises a ram blowout preventer body 1, an annular blowout preventer shell 2, an annular rubber core 3, a first piston 4, a second piston 5, a sealing block 6, an annular guide block 7, a guide plate 8, a spring 9, a first pressing sheet 10, an inclined hole 11, a baffle 12, a second pressing sheet 13, a first filter screen 14, a top block 15, a sealing gasket 16, a connecting block 17, a spray hole 18, a cleaning hole 19, a second filter screen 20, a connecting plate 21, an injection plate 22, an injection hole 23, a sealing plug 24, an elastic membrane 25, an injection head 26, a flow hole 27 and a control block 28.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example one
As shown in fig. 1 to 3, a blowout preventer stack for a workover rig according to an embodiment of the present invention includes a ram blowout preventer body 1, an annular blowout preventer housing 2, and an annular rubber core 3; the top of the ram blowout preventer body 1 is fixedly connected with an annular blowout preventer shell 2, and the annular blowout preventer shell 2 is designed into an annular structure; a first sealing groove is formed in the annular blowout preventer shell 2; a first piston 4 is connected inside the first sealing groove in a sliding manner; the top of the first piston 4 is provided with an annular rubber core 3; a second sealing groove is formed in the annular blowout preventer shell 2 at the top of the first piston 4; a second piston 5 is connected inside the second sealing groove in a sliding manner; the inside of the second sealing groove is connected with sealing blocks 6 at the top of the second piston 5 in a sliding manner, and the sealing blocks 6 are uniformly distributed along the ring shape; an annular guide block 7 is fixedly connected to the bottom of the sealing block 6 in the second sealing groove; the top surface of the annular guide block 7 is provided with a guide groove; the bottom surface of the sealing block 6 is fixedly connected with a guide plate 8, and springs 9 are fixedly connected between the guide plate 8 and the side surfaces of the guide groove; when the device works and the well blowout problem of an oil well occurs, firstly, the ram blowout preventer body 1 is enabled to preliminarily seal the oil well by controlling the hydraulic source, meanwhile, the first piston 4 is enabled to move upwards by controlling the hydraulic source, the first piston 4 can drive the annular rubber core 3 to shrink, the annular rubber core 3 and an oil pipe at the position of the well mouth are extruded together to realize the sealing of the well mouth, then the second piston 5 is controlled to move upwards by hydraulic force, the second piston 5 can drive the uniformly distributed sealing blocks 6 to synchronously move, the sealing blocks 6 uniformly distributed in the annular direction are combined together to realize the sealing of the well mouth, then the second piston 5 is controlled to move downwards to reset and open the annular rubber core 3, the annular rubber core 3 is prevented from keeping a long-term continuous sealing state, the annular rubber core 3 is reserved by the device, and the annular rubber core 3 can play a role of sealing and shielding, basically, blockked the blowout thing and lasted leading-in sealed piece 6 position, when stopping the blowout state, sealed piece 6 of control is sealed again, has guaranteed that sealed face position of sealed piece 6 can not block in a large amount into the foreign matter, influences sealed effect, seals through sealed piece 6 of stereoplasm, guarantees seal structure's intensity, consequently can realize lasting sealed effect.
As shown in fig. 3 and 4, a first pressing sheet 10 is fixedly connected to the top of the annular rubber core 3; the surface of the first pressing sheet 10 is provided with an inclined hole 11; a baffle plate 12 is fixedly connected to the top surface of the first pressing plate 10 at the position of the inclined hole 11; the during operation, through setting up first preforming 10, when the contact is sealed between core 3 and the oil pipe is glued to the annular, the first briquetting at core 3 top is glued to the annular also can be with oil pipe seal contact, if core 3 is glued to the annular sealed face card income when the foreign matter, the blowout thing can upwards spout through the clearance, under the sheltering from of first preforming 10, the blowout thing can upwards derive through inclined hole 11, then rethread baffle 12 is towards dispersion blowout thing all around, avoid the blowout thing direct a large amount of to sealed piece 6, when making sealed piece 6 sealed, the foreign matter is gone into to sealed face card of sealed piece 6 in a large number, influence sealed effect.
As shown in fig. 3 and 5, the bottom of the sealing block 6 is fixedly connected with a second pressing piece 13; the surface of the second pressing sheet 13 is provided with a through hole; a first filter screen 14 is fixedly connected inside the through hole; the during operation, through setting up second preforming 13, it is great to glue core 3 card to go into the foreign matter as the annular, glue core 3 and inclined hole 11 through the annular and upwards gush out when the blowout thing is more, the foreign matter piles up fast in sealed piece 6 below, and finally leading-in sealed piece 6 position, contact fast between second preforming 13 and the oil pipe through sealed piece 6 bottom, filter through the first filter screen 14 in second preforming 13 surface simultaneously, make the foreign matter can obtain basic filtration, the leading-in sealed piece 6 of stone and the oil pipe between the position has been avoided, it is finally sealed completely along with the folding up realization of sealed piece 6, because second preforming 13 has elastic deformation ability, can guarantee sealed piece 6 before sealed, the sheltering from the protective screen of basis has just been formed fast to its bottom.
As shown in fig. 6, the side surfaces of one side of the sealing block 6 are fixedly connected with top blocks 15; the side faces of the sealing blocks 6, which are opposite to the top blocks 15, are provided with top grooves; the side surface of the sealing block 6 is fixedly connected with a sealing gasket 16 at the position close to the top surface and the bottom surface of the sealing block 6; during operation, through setting up kicking block 15, when gathering together between two adjacent sealed pieces 6, insert through kicking block 15 and correspond the kerve for the blowout thing reduces or obtains complete control, then along with two sealed pieces 6 further draw close, correspond sealed 16 of filling up and contact again sealed, guaranteed can not block in a large amount between the sealed piece 6 and go into the foreign matter problem, improve sealed effect.
As shown in fig. 6 and 7, the cross sections of the top blocks 15 are all designed in a triangular structure, and the tips of the top blocks 15 face the corresponding top grooves; the inner parts of the top grooves are fixedly connected with connecting blocks 17; a pressure regulating groove is formed in the connecting block 17; a sealing opening is formed in the side face, opposite to one side face corresponding to the top block 15, of the connecting block 17; the section of the connecting block 17 is designed into a paired spiral structure at the position of a sealing opening; the during operation, through setting up connecting block 17, and offer sealed mouthful and oral area helical structure design to the surface of connecting block 17, under helical structure's elastic action when the sealed mouthful, be in encapsulated situation, when kicking block 15 inserts the sealed mouthful, connecting block 17 warp the indent, the internal pressure increase of adjustment tank this moment, sealed effect between connecting block 17 and kicking block 15 is better, when stopping sealing, kicking block 15 pulls out the sealed mouthful, under the spring action of connecting block 17 self, the whole outer hunch-up of sealed mouthful position structure, the sealed mouthful of soil stone block card income has been avoided, the influence is sealed.
The side surface of the top block 15, which is opposite to one side of the corresponding connecting block 17, is provided with a jet hole 18, and the jet hole 18 is externally connected with a pressure water source; in operation, by providing the nozzle holes 18, after the top block 15 is inserted into the inside of the connecting block 17, the inner pressure of the connecting block 17 is increased by controlling the nozzle holes 18 to introduce water into the pressure-regulating groove of the connecting block 17, thereby promoting the sealing effect between the connecting block 17 and the top block 15.
The connecting block 17 and the surface of the corresponding sealing block 6 are provided with cleaning holes 19 together, and the cleaning holes 19 are all positioned close to the sealing gasket 16; the inside of each cleaning hole 19 is fixedly connected with a second filter screen 20; during operation, through setting up washing hole 19, after the inside water pressure increase of connecting block 17, water can be through 19 spouts of washing hole, can wash sealed 16 through washing hole 19, before guaranteeing that the sealed 16 contact of filling up in pairs is sealed, sealed 16 sealing surface does not have a large amount of foreign matters.
Example two
As shown in fig. 8, a first comparative example, in which another embodiment of the present invention is: the surface of one of the sealing gaskets 16 is provided with a connecting groove, and the section of the connecting groove is designed into a spherical structure; the surface of the other corresponding sealing gasket 16 is fixedly connected with a connecting plate 21 relative to the connecting groove, and the volume of the connecting groove is larger than that of the connecting plate 21; during operation, through setting up connecting plate 21, when two sealed 16 relative motion that fill up, the connecting plate 21 on the sealed 16 surface that fills up of one side can insert inside the connecting groove on the sealed 16 surface that fills up of opposite side, because sealed 16 is the elastic material design, is encapsulated situation under the oral area initial condition of connecting groove, receives the automatic opening of back elastic deformation after the extrusion, has guaranteed that the inside of connecting groove can not lead into a large amount of foreign matters.
An injection groove is formed in the sealing gasket 16 close to the connecting groove; the interior of the injection groove is fixedly connected with an injection plate 22; the surface of the injection plate 22 is provided with an injection hole 23, and the injection hole 23 is externally connected with a rubber box through a pipeline; during operation, through setting up notes board 22, when sealed back, when still having a small amount of blowout material blowout, pour into glue into through annotating board 22 to the inside of spread groove, carry out the complete sealing with the clearance between spread groove and the connecting plate 21, satisfy the special requirement of handling under the emergency.
A connecting hole is formed between the injection groove and the connecting groove, and a sealing plug 24 is fixedly connected inside the connecting hole; the surface of the injection plate 22 is fixedly connected with an elastic membrane 25; the surface of the elastic membrane 25 is fixedly connected with a filling head 26 at the position of the sealing plug 24; a flow hole 27 is formed between the injection head 26 and the elastic membrane 25; a control block 28 is fixedly connected to the surface of the injection plate 22, and the control block 28 is slidably connected to the inside of the corresponding flow hole 27; the during operation, through setting up elastic membrane 25, when leading-in glue through notes hole 23, at first glue can promote the seal membrane inflation, the seal membrane can drive notes head 26 and remove, can release even hole with sealing plug 24 through annotating head 26, make even hole automatic opening, simultaneously the abundant inflation back of seal membrane, the control block 28 and the separation of discharge orifice 27 of fixed state, discharge orifice 27 automatic conduction, the inside glue of seal membrane can pour into the spread groove fast this moment, the realization is to the inside quick packing of spread groove, and then the realization is to the abundant sealing between two sealed pads 16.
When the device works and an oil well blowout problem occurs, firstly, the ram blowout preventer body 1 is enabled to preliminarily seal an oil well by controlling a hydraulic source, meanwhile, the first piston 4 is enabled to move upwards by controlling the hydraulic source, the first piston 4 can drive the annular rubber core 3 to shrink, the annular rubber core 3 and an oil pipe at the position of the well mouth are extruded together, sealing of the well mouth is achieved, then the second piston 5 is controlled to move upwards by hydraulic force, the second piston 5 can drive the uniformly-arranged sealing blocks 6 to move synchronously, the sealing blocks 6 uniformly distributed in the annular direction are combined together to achieve sealing of the well mouth, then the second piston 5 is controlled to move downwards, the annular rubber core 3 is enabled to reset and open, and the annular rubber core 3 is prevented from keeping a long-term continuous sealing state; by arranging the first pressing piece 10, when the annular rubber core 3 is in contact seal with an oil pipe, the first pressing piece at the top of the annular rubber core 3 can also be in seal contact with the oil pipe, if the sealing surface of the annular rubber core 3 is clamped with a foreign matter, a blowout object can be upwards ejected through a gap, under the shielding of the first pressing piece 10, the blowout object can be upwards led out through the inclined hole 11 and then is dispersed around through the baffle plate 12, the blowout object is prevented from being directly and massively ejected to the sealing block 6, and when the sealing block 6 is sealed, the sealing surface of the sealing block 6 is clamped with a large amount of foreign matters, so that the sealing effect is influenced; by arranging the second pressing sheet 13, when the annular rubber core 3 is clamped into a large amount of foreign matters and a large amount of blowout matters gushed upwards through the annular rubber core 3 and the inclined hole 11, the foreign matters are quickly accumulated below the sealing block 6 and are finally led into the position of the sealing block 6, the second pressing sheet 13 at the bottom of the sealing block 6 is quickly contacted with the oil pipe, and meanwhile, the foreign matters are filtered through the first filter screen 14 on the surface of the second pressing sheet 13, so that the foreign matters can be filtered basically, the situation that stones are led into the position between the sealing block 6 and the oil pipe is avoided, complete sealing is finally realized along with the folding of the sealing block 6, and the bottom of the sealing block 6 can be ensured to quickly form a basic shielding barrier before sealing due to the elastic deformation capacity of the second pressing sheet 13; by arranging the jacking blocks 15, when two adjacent sealing blocks 6 are gathered together, the jacking blocks 15 are inserted into corresponding jacking grooves, so that blowout objects are reduced or completely controlled, and then the corresponding sealing gaskets 16 are in contact sealing with the two adjacent sealing blocks 6 which are further gathered together, so that the problem that a large amount of foreign matters are clamped between the sealing blocks 6 is solved, and the sealing effect is improved; by arranging the connecting block 17 and arranging the sealing port and the spiral structure of the port on the surface of the connecting block 17, when the sealing port is in a sealing state under the elastic action of the spiral structure, when the jacking block 15 is inserted into the sealing port, the connecting block 17 deforms and concaves inwards, the internal pressure of the adjusting groove is increased at the moment, the sealing effect between the connecting block 17 and the jacking block 15 is better, when the sealing is stopped, the jacking block 15 pulls out of the sealing port, and the sealing port is integrally arched outwards under the elastic action of the connecting block 17, so that the phenomenon that soil and stone blocks are clamped into the sealing port to influence the sealing is avoided; by arranging the spray holes 18, after the top block 15 is inserted into the connecting block 17, the spray holes 18 are controlled to introduce water into the pressure regulating groove of the connecting block 17, so that the internal pressure of the connecting block 17 is increased, and the sealing effect between the connecting block 17 and the top block 15 is promoted; by arranging the cleaning holes 19, after the internal water pressure of the connecting block 17 is increased, water can be sprayed out through the cleaning holes 19, the sealing gaskets 16 can be cleaned through the cleaning holes 19, and the sealing surfaces of the sealing gaskets 16 are free of a large number of foreign matters before the paired sealing gaskets 16 are contacted and sealed; by arranging the connecting plate 21, when the two sealing gaskets 16 move relatively, the connecting plate 21 on the surface of the sealing gasket 16 on one side can be inserted into the connecting groove on the surface of the sealing gasket 16 on the other side, and because the sealing gasket 16 is designed by elastic materials, the opening part of the connecting groove is in a sealing state in an initial state, and is automatically opened by elastic deformation after being extruded, so that a large amount of foreign matters cannot be led into the connecting groove; by arranging the injection plate 22, when a small amount of blowout objects are still sprayed after sealing, glue is injected into the connecting groove through the injection plate 22, and a gap between the connecting groove and the connecting plate 21 is completely sealed, so that the special treatment requirement under emergency is met; through setting up elastic membrane 25, when leading-in glue through notes hole 23, at first glue can promote the seal membrane inflation, the seal membrane can drive notes head 26 and remove, can release even hole with sealing plug 24 through annotating head 26, make even hole automatic open, simultaneously the abundant inflation back of seal membrane, the control block 28 and the separation of discharge orifice 27 of fixed state, discharge orifice 27 automatic conduction, the inside glue of seal membrane can pour into the spread groove fast this moment, the realization is to the inside quick packing of spread groove, and then the realization is to the abundant sealing between two sealed pads 16.
The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A blowout preventer stack for a workover rig comprises a ram blowout preventer body (1), an annular blowout preventer shell (2) and an annular rubber core (3); the method is characterized in that: the top of the ram blowout preventer body (1) is fixedly connected with an annular blowout preventer shell (2), and the annular blowout preventer shell (2) is designed into an annular structure; a first sealing groove is formed in the annular blowout preventer shell (2); a first piston (4) is connected inside the first sealing groove in a sliding manner; the top of the first piston (4) is provided with an annular rubber core (3); a second sealing groove is formed in the annular blowout preventer shell (2) at the top of the first piston (4); a second piston (5) is connected inside the second sealing groove in a sliding manner; the inside of the second sealing groove is connected with sealing blocks (6) at the top of the second piston (5) in a sliding manner, and the sealing blocks (6) are uniformly distributed along the ring shape; an annular guide block (7) is fixedly connected to the bottom of the sealing block (6) in the second sealing groove; the top surface of the annular guide block (7) is provided with a guide groove; the bottom surface of sealed piece (6) has linked firmly baffle (8), and all has linked firmly spring (9) between the side of baffle (8) and guide slot.
2. The blowout preventer stack for a workover rig of claim 1, wherein: the top of the annular rubber core (3) is fixedly connected with a first pressing sheet (10); the surface of the first pressing sheet (10) is provided with an inclined hole (11); the top surface of the first pressing piece (10) is fixedly connected with a baffle (12) at the position of the inclined hole (11).
3. The blowout preventer stack for a workover rig of claim 2, wherein: the bottom of the sealing block (6) is fixedly connected with a second pressing piece (13); the surface of the second pressing sheet (13) is provided with a through hole; and a first filter screen (14) is fixedly connected inside the through hole.
4. The blowout preventer stack for a workover rig of claim 1, wherein: the side surface of one side of each sealing block (6) is fixedly connected with a top block (15); the side face, opposite to the top block (15), of one side of the sealing block (6) is provided with a top groove; the side surface of the sealing block (6) is close to the top surface and the bottom surface of the sealing block (6) and is fixedly connected with a sealing gasket (16).
5. The blowout preventer stack for a workover rig according to claim 4, wherein: the cross section of each jacking block (15) is designed into a triangular structure, and the tips of the jacking blocks (15) face to the corresponding jacking grooves; the inner parts of the top grooves are fixedly connected with connecting blocks (17); a pressure regulating groove is formed in the connecting block (17); a sealing opening is formed in the side face, corresponding to the ejecting block (15), of the connecting block (17); the cross section of the connecting block (17) is designed into a paired spiral structure at the position of the sealing port.
6. The blowout preventer stack for a workover rig according to claim 5, wherein: the ejecting block (15) is provided with jet holes (18) relative to the side face of one side of the corresponding connecting block (17), and the jet holes (18) are externally connected with a pressure water source.
7. The blowout preventer stack for a workover rig according to claim 6, wherein: the connecting block (17) and the surface of the corresponding sealing block (6) are provided with cleaning holes (19) together, and the cleaning holes (19) are all positioned close to the sealing gasket (16); and the inside of the cleaning hole (19) is fixedly connected with a second filter screen (20).
8. The blowout preventer stack for a workover rig according to claim 4, wherein: the surface of one of the sealing gaskets (16) is provided with a connecting groove, and the section of the connecting groove is designed into a spherical structure; and the surface of the other corresponding sealing gasket (16) is fixedly connected with a connecting plate (21) relative to the connecting groove, and the volume of the connecting groove is larger than that of the connecting plate (21).
9. The blowout preventer stack for a workover rig of claim 8, wherein: an injection groove is formed in the position, close to the connecting groove, in the sealing gasket (16); a casting plate (22) is fixedly connected inside the casting groove; and the surface of the injection plate (22) is provided with an injection hole (23), and the injection hole (23) is externally connected with a rubber box through a pipeline.
10. The blowout preventer stack for a workover rig according to claim 9, wherein: a connecting hole is formed between the injection groove and the connecting groove, and a sealing plug (24) is fixedly connected inside the connecting hole; the surface of the injection plate (22) is fixedly connected with an elastic membrane (25); the surface of the elastic membrane (25) is fixedly connected with a filling head (26) at the position of the sealing plug (24); a flow hole (27) is formed between the injection head (26) and the elastic membrane (25) together; a control block (28) is attached to the surface of the injection plate (22), and the control block (28) is slidably connected to the inside of the corresponding flow hole (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111214659.3A CN113898311A (en) | 2021-10-19 | 2021-10-19 | Blowout preventer stack for workover rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111214659.3A CN113898311A (en) | 2021-10-19 | 2021-10-19 | Blowout preventer stack for workover rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113898311A true CN113898311A (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111214659.3A Withdrawn CN113898311A (en) | 2021-10-19 | 2021-10-19 | Blowout preventer stack for workover rig |
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| Country | Link |
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| CN (1) | CN113898311A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116335575A (en) * | 2023-05-23 | 2023-06-27 | 东营孚瑞特能源设备有限公司 | Auxiliary device for petroleum well repairing operation |
-
2021
- 2021-10-19 CN CN202111214659.3A patent/CN113898311A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116335575A (en) * | 2023-05-23 | 2023-06-27 | 东营孚瑞特能源设备有限公司 | Auxiliary device for petroleum well repairing operation |
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Application publication date: 20220107 |