CN112983351B - Reducing flashboard rubber core - Google Patents
Reducing flashboard rubber core Download PDFInfo
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- CN112983351B CN112983351B CN202110548818.7A CN202110548818A CN112983351B CN 112983351 B CN112983351 B CN 112983351B CN 202110548818 A CN202110548818 A CN 202110548818A CN 112983351 B CN112983351 B CN 112983351B
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- rubber core
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- metal frameworks
- centers
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- 239000002184 metal Substances 0.000 claims abstract description 46
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 239000003292 glue Substances 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Images
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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
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- 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)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
A variable-diameter gate plate rubber core comprises a pair of semi-circular arc-shaped rubber cores, wherein driving holes are formed in the rubber cores along the circumferential direction, and penetrate through the top surfaces and the bottom surfaces of the rubber cores; the metal framework comprises a pair of fan-shaped plates which are arranged in parallel, the fan-shaped plates are connected through a connecting rod, the connecting rod is arranged in a driving hole, the fan-shaped plates are provided with glue overflowing holes which penetrate through the top surface and the bottom surface, one side surface of each fan-shaped plate is provided with an assembling groove, the other side surface of each fan-shaped plate is connected with an assembling block, and the assembling blocks can move in the assembling grooves; and the driving mechanism is arranged on the sector plate, and when the middle part of the extruded rubber core moves to the centers of the two rubber cores, the driving mechanism can drive the metal frameworks at the two ends to move to the centers of the two rubber cores. The invention can realize that the metal frameworks at two ends move towards the centers of the two rubber cores, prevent the rubber cores from being torn, realize the sealing of the drill rods with different diameters, and ensure that the rubber cores can overflow into the rubber overflow hole, thereby reducing the pressure on the rubber cores and preventing the rubber cores from being separated from the metal frameworks.
Description
Technical Field
The invention relates to the field of a gate plate rubber core, in particular to a variable-diameter gate plate rubber core.
Background
During oilfield operations, when a drilling tool encounters high pressure fluids in the formation, the high pressure fluids may rush into the wellbore through the gap between the drilling tool and the borehole, causing a kick or blowout phenomenon. In order to improve the safety of operation and workers, a well control device is required to be used for sealing a well mouth in the well drilling process so as to prevent the occurrence of a blowout phenomenon. At present, a blowout prevention component commonly used in a well control device is mainly a flashboard rubber core, and when a well blowout occurs, the purpose of blowout prevention can be achieved by closing the flashboard rubber core to close a well mouth. Present flashboard rubber core is mostly the sizing, need change the flashboard rubber core of corresponding specification when sealed to the drilling rod of different diameters, the operation is complicated, when two flashboard rubber cores seal, the flashboard rubber core middle part is at first with the drilling rod contact, the action of flashboard rubber core both ends pressure is gradually to the drilling rod removal, this process is great to the torsional force of rubber, cause rubber tear easily, and glue the core pressure-bearing nature in order to improve the flashboard, generally can glue core top surface and bottom surface at the flashboard and add the parallels subassembly, when the flashboard rubber core receives the extrusion force too big, cause rubber and parallels separation easily, stability is relatively poor, need improve.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the reducing flashboard rubber core, which can realize that metal frameworks at two ends move to the centers of the two rubber cores, prevent the rubber cores from being torn, realize the sealing of drill rods with different diameters, enable the rubber cores to overflow into a rubber overflow hole, reduce the pressure on the rubber cores and prevent the rubber cores from being separated from the metal frameworks.
In order to achieve the above object, the present invention employs the following techniques:
a reducing gate rubber core comprises:
the rubber core is provided with driving holes along the circumferential direction, the driving holes penetrate through the top surface and the bottom surface of the rubber core, the inner diameter of the rubber core is connected with an inner sealing layer in an arc shape, and the outer diameter of the rubber core is connected with an outer sealing layer in an arc shape;
the metal frameworks are provided with two groups and are respectively embedded in the two rubber cores, the metal frameworks are provided with a plurality of arc-shaped arrangements, gaps are reserved between every two adjacent metal frameworks, each metal framework comprises a pair of fan-shaped plates which are arranged in parallel, the fan-shaped plates are connected through connecting rods, the connecting rods are arranged in the driving holes, the fan-shaped plates are provided with glue overflowing holes which penetrate through the top surface and the bottom surface, one side surface of each fan-shaped plate is provided with an assembling groove, the other side surface of each fan-shaped plate is connected with an assembling block, and the assembling blocks can move in the assembling grooves;
and the driving mechanism is arranged on the sector plate, and when the middle part of the extruded rubber core moves to the centers of the two rubber cores, the driving mechanism can drive the metal frameworks at the two ends to move to the centers of the two rubber cores.
Further, the top and bottom surfaces of the inner and outer containment sheets are flush with the sector plate.
Furthermore, the driving mechanism comprises an arc-shaped outer ring, the outer ring is located in the middle of the rubber cores, the middle of the outer ring is fixed on the sector plate, the arc-shaped inner rings are matched with the inner sides of the two ends of the outer ring, and when the two outer rings move towards the centers of the two rubber cores, the inner rings can be driven to move towards the centers of the two rubber cores.
Furthermore, the other end of the inner ring is fixed on the sector plate located at the end part, a slot is formed in one end part of the inner ring, an inserting rod is arranged at the other end part of the inner ring, when the two rubber cores are matched, the inserting rod on one group of metal frameworks is completely matched with the slot on the other group of metal frameworks, and the assembling block on one group of metal frameworks is inserted into the assembling slot on the other group of metal frameworks.
Furthermore, the sector plates positioned in the moving range of the inner ring are connected with vertical rods, the vertical rods are rotatably connected with a rotating drum, and the rotating drum is in contact with the inner ring.
Furthermore, a pair of support rods is connected with the matching end of the inner ring and the outer ring, the end parts of the support rods are rotatably connected with rotating rollers, and the rotating rollers are in rolling contact with the inner wall of the outer ring.
Furthermore, the top end of the upright rod is connected with a limiting block, and the bottom surface of the limiting block is attached to the top surface of the inner ring.
Furthermore, the outer sealing layer is symmetrically connected with a pair of mounting blocks, the inner side surface of one group of mounting blocks is provided with a positioning groove, the inner side surface of the other group of mounting blocks is connected with a positioning rod, and the positioning rod is inserted into the positioning groove in a sliding manner.
Furthermore, the outer side surface of the mounting block is connected with a mounting rod, and the mounting rod is radially provided with a mounting hole.
Further, the end of the positioning rod is tapered.
The invention has the beneficial effects that:
1. utilize the metal framework at actuating mechanism drive both ends to two rubber core center removal, prevent that the moment of torsion to the rubber core is too big, cause the rubber core to tear, realize the sealed of different diameter drilling rods, when the rubber core received the extrusion force too big, the rubber core spills over to the excessive gluey downthehole of flash of sector plate opening, reduces the pressure that the rubber core received, prevents the separation of rubber core and metal framework, improves flashboard rubber core stability.
2. After the inner rings on the two groups of metal frameworks are connected, when the two outer rings move to the centers of the two rubber cores along with the metal frameworks, the outer rings extrude the end parts of the inner rings to slide along the inner walls of the outer rings, and the inner rings move to the centers of the two rubber cores.
3. The inner ring extrudes the rotary drum, the inner ring and the rotary drum generate relative rotation, the abrasion to the inner ring is reduced, and the rotary drum drives the sector plates located in the moving range of the inner ring to move towards the centers of the two rubber cores through the vertical rods.
4. The inner ring end part is in rolling contact with the inner wall of the outer ring through the rotating roller, the abrasion of the inner wall of the outer ring can be reduced, the vertical rod is provided with a limiting block, the bottom surface of the limiting block is attached to the top surface of the inner ring, the inner ring can be prevented from being separated from the rotating cylinder when the rubber core is extruded and deformed, and the structural stability of the driving mechanism is improved.
5. When two sets of two rubber cores move to the center, the locating lever inserts the constant head tank, keeps two rubber cores to be located the coplanar, improves sealed effect, and the locating lever tip is the toper can realize that the locating lever inserts in the constant head tank fast.
Drawings
Fig. 1 is a first structural diagram of the present invention.
FIG. 2 is a second schematic structural diagram of the present invention.
FIG. 3 is a schematic view of the rubber core structure of the present invention.
FIG. 4 is a schematic view of the metal skeleton structure of the present invention.
Fig. 5 is a schematic view of a partial structure a in fig. 1.
Figure 6 is a schematic view of the pole construction of the present invention.
Fig. 7 is a schematic view of a portion B of fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, but the described embodiments of the present invention are a part of the embodiments of the present invention, not all of the embodiments of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only for convenience of describing the present invention and simplifying the description. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "parallel", "perpendicular", etc. do not require that the components be absolutely parallel or perpendicular, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; either directly or indirectly through intervening media, or through both elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1 to 4, a reducing gate rubber core comprises a pair of semi-arc rubber cores 1, two sets of metal frameworks 2 embedded in the two rubber cores 1 respectively, the metal frameworks 2 are provided with a plurality of arc-shaped arrangements, a gap is left between the two adjacent metal frameworks 2, and the reducing gate rubber core further comprises a driving mechanism 3.
The rubber core 1 is provided with a driving hole 101 along the circumferential direction, the driving hole 101 penetrates through the top surface and the bottom surface of the rubber core 1, the inner diameter of the rubber core 1 is connected with an inner sealing layer 102 in a circular arc shape, the outer diameter of the rubber core 1 is connected with an outer sealing layer 103 in a circular arc shape, and the top surface and the bottom surface of the inner sealing layer 102 and the top surface and the bottom surface of the outer sealing layer 103 are flush with the sector plate 201.
The metal framework 2 comprises a pair of fan-shaped plates 201 which are arranged in parallel, the fan-shaped plates 201 are connected through a connecting rod 202, the connecting rod 202 is arranged in the driving hole 101, the fan-shaped plates 201 are provided with glue overflowing holes 203 which penetrate through the top surface and the bottom surface, one side surface of each fan-shaped plate 201 is provided with an assembling groove 204, the other side surface of each fan-shaped plate 201 is connected with an assembling block 205, and the assembling blocks 205 can be moved in the assembling grooves 204.
The driving mechanism 3 is arranged on the sector plate 201, and when the middle part of the extruded rubber core 1 moves to the centers of the two rubber cores 1, the driving mechanism 3 can drive the metal frameworks 2 at the two ends to move to the centers of the two rubber cores 1.
When the flashboard rubber core works, firstly, the flashboard rubber core is arranged on the flashboard, the driving device is utilized to push the two outer sealing layers 103 to move towards the drill rod so as to enable the two rubber cores 1 to be matched, at the moment, the assembling block 205 is positioned in the assembling groove 204, when the outer sealing layers 103 continue to move towards the drill rod, the outer sealing layers 103, the rubber cores 1 and the inner sealing layers 102 are all extruded and deformed, meanwhile, the driving mechanism 3 drives the metal frameworks 2 at two ends to move towards the centers of the two rubber cores 1, the gap between the two adjacent metal frameworks 2 is gradually reduced, as the connecting rod 202 is arranged in the driving hole 101, the two ends of the rubber cores 1 can be pushed to move towards the centers of the two rubber cores 1, the phenomenon that the rubber cores 1 are torn due to overlarge torque force is prevented, the application range is wide, when the rubber cores 1 are extruded too much, the rubber cores 1 overflow holes 203 opened by the sector plates 201 are overflowed, the pressure that rubber core 1 received is reduced, prevents that rubber core 1 and metal framework 2 from separating, improves flashboard rubber core stability, and the top surface and the bottom surface of interior sealing layer 102 and external seal layer 103 all are with sector plate 201 parallel and level, increase the width of interior sealing layer 102 and external seal layer 103, improve sealed effect.
Further, as shown in fig. 5 to 7, the driving mechanism 3 includes an arc-shaped outer ring 301, the outer ring 301 is located in the middle of the rubber cores 1, the middle of the outer ring 301 is fixed to the sector plates 201, the inner sides of the two ends of the outer ring 301 are fitted with the arc-shaped inner rings 302, when the two outer rings 301 move towards the centers of the two rubber cores 1, the inner rings 302 can be driven to move towards the centers of the two rubber cores 1, the other ends of the inner rings 302 are fixed to the sector plates 201 located at the ends, one of the inner rings 302 is provided with a slot 303, the other inner ring 302 is provided with an insertion rod 304, when the two rubber cores 1 are fitted, the insertion rod 304 on one group of the metal frameworks 2 is completely fitted with the slot 303 on the other group of the metal frameworks 2, the assembling block 205 on one group of the metal frameworks 2 is inserted into the assembling slot 204 on the other group of the metal frameworks 2, the sector plates 201 located in the moving range of the inner rings 302 are both connected with the upright rods 305, the upright rods 305 are rotatably connected with the rotating drum 306, the rotating cylinder 306 is contacted with the inner ring 302, the matching end of the inner ring 302 and the outer ring 301 is connected with a pair of supporting rods 307, the end parts of the supporting rods 307 are rotatably connected with rotating rollers 308, the rotating rollers 308 are in rolling contact with the inner wall of the outer ring 301, the top end of the vertical rod 305 is connected with a limiting block 309, and the bottom surface of the limiting block 309 is attached to the top surface of the inner ring 302.
When the driving mechanism 3 works, firstly, the two rubber cores 1 are matched to enable the inserted rod 304 on one group of metal frameworks 2 to be completely matched with the slot 303 on the other group of metal frameworks 2, the inner rings 302 on the two groups of metal frameworks 2 are connected, when the two outer rings 301 move towards the centers of the two rubber cores 1 along with the metal frameworks 2, the outer rings 301 press the end parts of the inner rings 302 to slide along the inner walls of the outer rings 301, so that the inner rings 302 move towards the centers of the two rubber cores 1, meanwhile, the inner rings 302 press the rotating cylinders 306, the inner rings 302 and the rotating cylinders 306 rotate relatively to reduce the abrasion to the inner rings 302, the rotating cylinders 306 drive the sector plates 201 positioned in the moving range of the inner rings 302 to move towards the centers of the two rubber cores 1 through the upright rods 305, the end parts of the inner rings 302 are in rolling contact with the inner walls of the outer rings 301 through the rotating rollers 308, the abrasion to reduce the inner walls of the outer rings 301, the upright rods 305 are provided with the limiting blocks 309, and the bottom surfaces of the limiting blocks 309 are attached to the top surfaces of the inner rings 302, the inner ring 302 and the drum 306 can be prevented from being separated when the rubber core 1 is extruded and deformed, and the structural stability of the driving mechanism 3 is improved.
Furthermore, the outer sealing layer 103 is symmetrically connected with a pair of mounting blocks 104 outside, wherein a positioning groove 105 is formed on the inner side surface of one of the mounting blocks 104, a positioning rod 106 is connected to the inner side surface of the other mounting block 104, the positioning rod 106 is slidably inserted into the positioning groove 105, the end portion of the positioning rod 106 is tapered, a mounting rod 107 is connected to the outer side surface of the mounting block 104, and a mounting hole 108 is formed in the mounting rod 107 along the radial direction.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is apparent that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. The utility model provides a reducing flashboard rubber core which characterized in that includes:
the rubber core (1) is provided with driving holes (101) along the circumferential direction, the driving holes (101) penetrate through the top surface and the bottom surface of the rubber core (1), the inner diameter of the rubber core (1) is connected with an inner sealing layer (102) in an arc shape, and the outer diameter of the rubber core (1) is connected with an outer sealing layer (103) in an arc shape;
the rubber core assembly comprises two groups of metal frameworks (2), wherein the two groups of metal frameworks are arranged and are respectively embedded in two rubber cores (1), the metal frameworks (2) are provided with a plurality of arc-shaped arrangements, gaps are reserved between every two adjacent metal frameworks (2), each metal framework (2) comprises a pair of sector plates (201) which are arranged in parallel, the sector plates (201) are connected through connecting rods (202), the connecting rods (202) are arranged in driving holes (101), the sector plates (201) are provided with glue overflowing holes (203) which penetrate through the top surface and the bottom surface, one side surface of each sector plate (201) is provided with an assembly groove (204), the other side surface of each sector plate (201) is connected with an assembly block (205), and the assembly blocks (205) can be moved into the assembly grooves (204);
drive mechanism (3), locate sector plate (201), when extrusion rubber core (1) middle part moves to two rubber core (1) centers, drive mechanism (3) can drive metal framework (2) at both ends and move to two rubber core (1) centers, drive mechanism (3) are including curved outer lane (301), outer lane (301) are located rubber core (1) middle part, outer lane (301) middle part is fixed in sector plate (201), outer lane (301) both ends inboard cooperation has curved inner circle (302), can drive inner circle (302) and move to two rubber core (1) centers when two outer lanes (301) move to two rubber core (1) centers.
2. The rubber core of the variable-diameter gate plate as claimed in claim 1, wherein: the top surface and the bottom surface of the inner sealing layer (102) and the outer sealing layer (103) are flush with the sector plate (201).
3. The rubber core of the variable-diameter gate plate as claimed in claim 1, wherein: the other end of the inner ring (302) is fixed on the sector plate (201) located at the end part, a slot (303) is formed in the end part of one inner ring (302), an inserting rod (304) is arranged at the end part of the other inner ring (302), when the two rubber cores (1) are matched, the inserting rod (304) on one group of metal frameworks (2) is completely matched with the slot (303) on the other group of metal frameworks (2), and an assembling block (205) on one group of metal frameworks (2) is inserted into an assembling slot (204) on the other group of metal frameworks (2).
4. The rubber core of the variable-diameter gate plate as claimed in claim 1, wherein: vertical rods (305) are connected to the sector plates (201) within the moving range of the inner ring (302), the vertical rods (305) are connected with rotating cylinders (306) in a rotating mode, and the rotating cylinders (306) are in contact with the inner ring (302).
5. The rubber core of the variable-diameter gate plate as claimed in claim 1, wherein: the inner ring (302) and the outer ring (301) are connected with a pair of supporting rods (307), the ends of the supporting rods (307) are rotatably connected with a rotating roller (308), and the rotating roller (308) is in rolling contact with the inner wall of the outer ring (301).
6. The rubber core of the variable-diameter gate plate as claimed in claim 4, wherein: the top end of the upright rod (305) is connected with a limiting block (309), and the bottom surface of the limiting block (309) is attached to the top surface of the inner ring (302).
7. The rubber core of the variable-diameter gate plate as claimed in claim 1, wherein: the outer sealing layer (103) is externally and symmetrically connected with a pair of mounting blocks (104), wherein a positioning groove (105) is formed in the inner side surface of one group of mounting blocks (104), a positioning rod (106) is connected to the inner side surface of the other group of mounting blocks (104), and the positioning rod (106) is slidably inserted into the positioning groove (105).
8. The rubber core of the variable-diameter gate plate as claimed in claim 7, wherein: the outer side surface of the mounting block (104) is connected with a mounting rod (107), and the mounting rod (107) is provided with a mounting hole (108) along the radial direction.
9. The rubber core of the variable-diameter gate plate as claimed in claim 7, wherein: the end of the positioning rod (106) is conical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110548818.7A CN112983351B (en) | 2021-05-20 | 2021-05-20 | Reducing flashboard rubber core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110548818.7A CN112983351B (en) | 2021-05-20 | 2021-05-20 | Reducing flashboard rubber core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112983351A CN112983351A (en) | 2021-06-18 |
| CN112983351B true CN112983351B (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110548818.7A Active CN112983351B (en) | 2021-05-20 | 2021-05-20 | Reducing flashboard rubber core |
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| CN (1) | CN112983351B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323617B (en) * | 2021-08-03 | 2021-11-02 | 四川新为橡塑有限公司 | Novel variable-diameter gate plate rubber core |
| CN114396241B (en) * | 2022-03-28 | 2022-06-10 | 四川新为橡塑有限公司 | Double-layer sealed spherical rubber core and annular blowout preventer |
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| US3897038A (en) * | 1973-01-22 | 1975-07-29 | Hydril Co | Blowout preventer with variable inside diameter |
| US4295001A (en) * | 1979-12-03 | 1981-10-13 | Inspiration Consolidated Copper Company | Electrode seal |
| US4332367A (en) * | 1980-05-02 | 1982-06-01 | Nl Industries, Inc. | Blowout preventer having a variable ram seal |
| US4930745A (en) * | 1988-04-29 | 1990-06-05 | Granger Stanley W | Variable bore ram rubber |
| US5064164A (en) * | 1990-08-16 | 1991-11-12 | Baroid Technology, Inc. | Bop seal with improved metal inserts |
| US5406580A (en) * | 1993-12-23 | 1995-04-11 | Hatch Associates Ltd. | Electrode seal for arc furnaces |
| US6955357B2 (en) * | 2002-10-07 | 2005-10-18 | Cooper Cameron Corporation | Extended range variable bore ram packer for a ram type blowout preventer |
| US8844898B2 (en) * | 2009-03-31 | 2014-09-30 | National Oilwell Varco, L.P. | Blowout preventer with ram socketing |
| CN202360056U (en) * | 2011-11-10 | 2012-08-01 | 重庆中重石油机械有限公司 | Left variable-diameter flashboard |
| US20140048245A1 (en) * | 2012-08-16 | 2014-02-20 | Hydril Usa Manufacturing Llc | Replaceable Wear Plates for Use with Blind Shear Rams |
| CN104612622A (en) * | 2013-11-03 | 2015-05-13 | 卞康群 | Reducing rubber core |
| CN104131798A (en) * | 2014-08-27 | 2014-11-05 | 上海神开石油化工装备股份有限公司 | Large-range variable-diameter flashboard for blowout preventer |
| CN104315011A (en) * | 2014-09-25 | 2015-01-28 | 芜湖市中亚汽车制动元件有限公司 | Spring clutch |
| CN104405327A (en) * | 2014-10-13 | 2015-03-11 | 重庆中重石油机械有限公司 | Variable diameter ram monomer |
| CN204663460U (en) * | 2015-05-05 | 2015-09-23 | 河北华北石油荣盛机械制造有限公司 | Ram preventer variable bore ram on a large scale |
| US10087698B2 (en) * | 2015-12-03 | 2018-10-02 | General Electric Company | Variable ram packer for blowout preventer |
| US10233715B2 (en) * | 2016-07-25 | 2019-03-19 | Cameron International Corporation | Packer assembly with multi-material inserts for blowout preventer |
| CN206926156U (en) * | 2017-06-26 | 2018-01-26 | 四川新为橡塑有限公司 | A kind of mould of reducing glue core |
| CN208502718U (en) * | 2018-04-28 | 2019-02-15 | 江苏亿德隆石油机械有限公司 | A kind of reducing blowout preventer flashboard |
| CN109236206A (en) * | 2018-10-18 | 2019-01-18 | 西南石油大学 | A kind of reducing air operated slips suitable for more size tubing strings |
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2021
- 2021-05-20 CN CN202110548818.7A patent/CN112983351B/en active Active
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| CN112983351A (en) | 2021-06-18 |
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Inventor after: Zhou Yongguo Inventor after: Wu Xiangdong Inventor after: Liu Ming Inventor after: Yang Zaixu Inventor after: Liao Jiajun Inventor after: Zheng Suhua Inventor after: Wang Dong Inventor after: Zhao Jigang Inventor after: Feng Xuhai Inventor before: Zhou Yongguo Inventor before: Wang Dong Inventor before: Zhao Jigang Inventor before: Feng Xuhai Inventor before: Wu Xiangdong Inventor before: Kuang Shengping Inventor before: Du Fenghui Inventor before: Jia Hongjun Inventor before: Liu Ming Inventor before: Yang Zaixu Inventor before: Liao Jiajun Inventor before: Zheng Suhua |