CN202745793U - Uniform-shrinkage spherical rubber core of blowout preventer - Google Patents
Uniform-shrinkage spherical rubber core of blowout preventer Download PDFInfo
- Publication number
- CN202745793U CN202745793U CN 201220365752 CN201220365752U CN202745793U CN 202745793 U CN202745793 U CN 202745793U CN 201220365752 CN201220365752 CN 201220365752 CN 201220365752 U CN201220365752 U CN 201220365752U CN 202745793 U CN202745793 U CN 202745793U
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- Prior art keywords
- taper seat
- spherical
- glue core
- rubber core
- conical surface
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- Expired - Fee Related
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000003292 glue Substances 0.000 claims description 59
- 230000008602 contraction Effects 0.000 claims description 4
- 238000004073 vulcanization Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 8
- 238000007789 sealing Methods 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 abstract description 2
- 230000007704 transition Effects 0.000 abstract 3
- 238000009826 distribution Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
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Abstract
The uniformly contracted spherical rubber core of the blowout preventer is applied to the blowout preventer for oil and gas field drilling. The inner part of the rubber core is uniformly distributed with 10-16 iron cores, the rubber is vulcanized into a hemisphere shape and is provided with a central hole, the inner wall of the spherical rubber core forms an inner cylindrical surface, the spherical rubber core is uniformly distributed with notches on the hemisphere, and a convex block is formed between the two notches; a first conical surface is arranged at the upper part of the inner cylindrical surface, and a first transition fillet is arranged between the first conical surface and the inner cylindrical surface; a second conical surface is arranged at the upper part of the first conical surface, and a second transition fillet is arranged between the first conical surface and the second conical surface; the outer edge of the second conical surface and the inner root of the convex block are in arc transition. The effect is as follows: the stress state of the spherical rubber core is improved, and the service life of the spherical rubber core is prolonged. Under the condition of meeting the requirements of sealing the well, the service life of the spherical rubber core is prolonged to the maximum extent, and the sealing effect is improved.
Description
Technical field
The utility model relates to oilfield drilling equipment technology field, and particularly preventer is a kind of packing unit of sphere, is a kind of spherical glue core of preventer of even contraction.
Background technology
Spherical blow-out preventer is widely used a kind of blowout hookup on the oil gas field well head, and spherical glue core is the sealing core component in the spherical blow-out preventer.Spherical glue core mainly is subject to the effect of following power in the course of the work: one, and spherical glue core bottom is subject to the driven in translation power effect that piston makes progress; They are two years old, spherical glue core is subject to the constraint of top cover Internal Spherical Surface, impose on pressure that points to the sphere centre direction of spherical glue core, this pressure makes spherical glue core distortion to the center contraction and moves up, and applies one along the frictional force of sphere tangent line downward direction for simultaneously spherical glue core; Its three, spherical glue core after the areal deformation to a certain extent of spherical glue in-core, can produce from contact, thereby form from contact during to the center shrinkage strain.Its four, act on from the high pressure fluid in shaft bottom in the annular groove on the upper and piston top of spherical glue core " funnel surface ", work the envelope effect that helps, i.e. self sealing action power.Under the acting in conjunction of these power, spherical glue core top shrinkage strain is larger, and the bottom shrinkage strain is less, so the phenomenon that spherical glue core top is very easily destroyed often occurs.
At present, the spherical glue core produced of most of preventer manufacturer all is to copy the external product design.Those skilled in the art are familiar with its outer shape and structure very much.Consult Fig. 2.Spherical glue core inner is evenly distributed with 10～16 iron cores and the vulcanization of rubber becomes the hemisphere bodily form, spherical glue core is to form the hemisphere bodily form by rubber, and centre bore is arranged, and spherical Jiao Xinneibi forms an inner periphery 1, at the hemispheroidal gap that is evenly distributed with, form protruding block 7 between two gap; On the top of inner periphery 1 taper seat 8 is arranged, ring-shaped platform 9 is arranged at the top of taper seat 8, and the interior root of the outer of ring-shaped platform 9 and protruding block 7 has circular arc excessive.Although this structure design has increased the storage glue amount of spherical glue core, after sealing with drilling-rod external wall, the rubber of its top " unnecessary " very easily is torn and comes off, and reduces the shut-in well ability of spherical glue core.
Existing spherical glue core shut-in well technical problem is: spherical glue core is in the shut-in well process, and the part rubber in the spherical glue core is extruded contact to form with the drill string outer wall and shunts in a well.Consult Fig. 3.The spherical glue core distortion starting stage, inner periphery 1 engenders more uniform axial depression 10 and axial projection 11; Along with the carrying out of shut-in well process, axial depression 10 and axial projection 11 degrees of irregularity increase, and axial depression 10 is obviously deepened, and the stress at axial depression 10 places is very big, considerably beyond the strength limit of rubber.Rubber begins to tear at axial depression 10 places and destroys and slowly expansion, causes spherical glue core segment rubber to come off, and last whole spherical glue core loses sealability.
The utility model content
The purpose of this utility model is: the spherical glue core of preventer that a kind of even contraction is provided, solve the spherical glue core of domestic existing spherical blow-out preventer low problem in application life, guarantee spherical glue core shut-in well effect, make the contact distribution between spherical glue core and the drill string more even, improve again its application life simultaneously.
The technical solution adopted in the utility model is: the spherical glue core of the preventer that evenly shrinks, inside is evenly distributed with 10～16 iron cores and the vulcanization of rubber becomes the hemisphere bodily form, centre bore is arranged, spherical Jiao Xinneibi forms an inner periphery, spherical glue core forms protruding block at the hemispheroidal gap that is evenly distributed with between two gap; It is characterized in that: first taper seat is arranged on the top of inner periphery, the first excessive fillet is arranged between the first taper seat and the inner periphery; On the top of the first taper seat second taper seat is arranged, the second excessive fillet is arranged between the first taper seat and the second taper seat; The interior root of the outer of the second taper seat and protruding block has circular arc excessive.
In order to make the spherical glue core distortion starting stage, when inner periphery engenders more uniform axial depression and axial projection, the axial depression and the axial projection that occur are regular, fluted on the first taper seat and the second taper seat, the position correspondence of the even distribution of described groove and groove is between two protruding blocks; The bottom of groove is the circular arc smooth curve.
The improvement principle of the spherical glue core of the preventer that summary is evenly shunk.Consult Fig. 2.(1) taper seat 8 and the ring-shaped platform 9 with existing spherical glue core changes (consulting Fig. 1) first taper seat 3 and the second taper seat 5 into, too fast part was extruded in the spherical glue core distortion in top when effect was to remove shut-in well, make spherical glue core plastic squeeze amount more even vertically, spherical glue core stress distribution improves; Simultaneously, the contact of spherical glue core and drill string also becomes more even vertically.(2) the first excessive fillet 2 is arranged between inner periphery 1 and the first taper seat 3, the second excessive fillet 4 is arranged between the first taper seat 3 and the second taper seat 5, can reduce the stress at seamed edge place and concentrate; Spherical glue in-core surface axial depression 10 and axial projection 11 made spherical glue core plastic squeeze amount reach unanimity along hoop when (3) effect of groove 6 was to reduce shut-in well, and spherical glue core stress distributes more even along hoop; Simultaneously, the distortion of spherical glue core is shunk more all even easy, and the required fluid control pressure of piston when helping to reduce shut-in well improves shut-in well speed.The degree of depth of groove 6 and downward length can not be too large, otherwise may can not shunt in a well because spherical glue core storage glue amount is inadequate.
The beneficial effects of the utility model: the spherical glue core of the preventer that the utility model evenly shrinks, the stress of this spherical glue cored structure and drill string contact area becomes more even, and the stress of spherical glue core improves, and has prolonged the application life of spherical glue core.Under the condition that satisfies the shut-in well requirement, prolong to greatest extent the application life of spherical glue core, improve sealing effectiveness; The required fluid control pressure of piston when helping simultaneously to reduce shut-in well improves shut-in well speed.
Description of drawings
Fig. 1 is the spherical glue cored structure of the preventer generalized section that the utility model evenly shrinks.
Fig. 2 is the spherical glue cored structure of existing preventer generalized section.
Fig. 3 is the A-A generalized section of Fig. 2.
Among the figure, 1-inner periphery, 2-the first excessive fillet, 3-the first taper seat, 4-the second excessive fillet, 5-the second taper seat, 6-groove, 7-protruding block, 8-taper seat, 9-ring-shaped platform, 10-axial depression, 11-axial projection.
The specific embodiment
Embodiment 1: take a spherical glue core of the preventer that evenly shrinks as example, the utility model is described in further detail.
Consult Fig. 1.The spherical glue core of the preventer that the utility model evenly shrinks, inside is evenly distributed with 16 iron cores and the vulcanization of rubber becomes the hemisphere bodily form, and centre bore is arranged, center-hole diameter 204mm, spherical Jiao Xinneibi forms an inner periphery 1.Spherical glue core is at hemispheroidal 16 gap, protruding block 7 of formation between per two gap of being evenly distributed with.It is between 95 the first taper seat 3, the first taper seats 3 of spending and the inner periphery 1 the first excessive fillet 2 to be arranged that a tapering is arranged on the top of inner periphery 1.It is the second taper seat 5 of 150 degree that a tapering is arranged on the top of the first taper seat 3, and the second excessive fillet 4 is arranged between the first taper seat 3 and the second taper seat 5.It is that the circular arc of 25mm is excessive that the interior root of the outer of the second taper seat 5 and protruding block 7 has radius.
At the first taper seat 3 and the second taper seat 5 16 grooves 6 are arranged, the position correspondence of described groove 6 even distributions and groove 6 is between two protruding blocks 7.The bottom of groove 6 is the circular arc smooth curve.The upper end of groove 6 is than the wide 6mm in the lower end of groove 6.The external shape of the spherical glue core of external shape and existing preventer does not change.
Claims (2)
1. spherical glue core of the preventer that evenly shrinks, inside is evenly distributed with 10～16 iron cores and the vulcanization of rubber becomes the hemisphere bodily form, centre bore is arranged, spherical Jiao Xinneibi forms an inner periphery (1), spherical glue core forms protruding block (7) at the hemispheroidal gap that is evenly distributed with between two gap; It is characterized in that: on the top of inner periphery (1) first taper seat (3) is arranged, the first excessive fillet (2) is arranged between the first taper seat (3) and the inner periphery (1); On the top of the first taper seat (3) second taper seat (5) is arranged, the second excessive fillet (4) is arranged between the first taper seat (3) and the second taper seat (5); The interior root of the outer of the second taper seat (5) and protruding block (7) has circular arc excessive.
2. the spherical glue core of the preventer of even contraction according to claim 1, it is characterized in that: in the first taper seat (3) and the second taper seat (5) upper fluted (6), described groove (6) evenly distribute and the position correspondence of groove (6) between two protruding blocks (7); The bottom of groove (6) is the circular arc smooth curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220365752 CN202745793U (en) | 2012-07-26 | 2012-07-26 | Uniform-shrinkage spherical rubber core of blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220365752 CN202745793U (en) | 2012-07-26 | 2012-07-26 | Uniform-shrinkage spherical rubber core of blowout preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202745793U true CN202745793U (en) | 2013-02-20 |
Family
ID=47705210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220365752 Expired - Fee Related CN202745793U (en) | 2012-07-26 | 2012-07-26 | Uniform-shrinkage spherical rubber core of blowout preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202745793U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115898319A (en) * | 2023-02-24 | 2023-04-04 | 四川新为橡塑有限公司 | Compound annular preventer of two rubber cores |
-
2012
- 2012-07-26 CN CN 201220365752 patent/CN202745793U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115898319A (en) * | 2023-02-24 | 2023-04-04 | 四川新为橡塑有限公司 | Compound annular preventer of two rubber cores |
| CN115898319B (en) * | 2023-02-24 | 2023-05-09 | 四川新为橡塑有限公司 | Double-rubber-core composite annular blowout preventer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130220 Termination date: 20210726 |