CN217602621U - Double-seal automatic deviation-adjusting compensation wellhead blowout preventer - Google Patents
Double-seal automatic deviation-adjusting compensation wellhead blowout preventer Download PDFInfo
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- CN217602621U CN217602621U CN202221695760.5U CN202221695760U CN217602621U CN 217602621 U CN217602621 U CN 217602621U CN 202221695760 U CN202221695760 U CN 202221695760U CN 217602621 U CN217602621 U CN 217602621U
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Abstract
The utility model relates to a double-sealing automatic deviation-adjusting compensation wellhead blowout preventer, which comprises a blowout preventer main body, wherein the bottom end of the blowout preventer main body is connected with a lower joint; two sides of the two-way valve are provided with occlusion sealing plugs, and the middle of the two occlusion sealing plugs is provided with a movable channel; both sides of the occlusion sealing plug are connected with hand wheel rods, and the end parts of the hand wheel rods are connected with hand wheels; the blowout preventer further comprises a sealing device group connected to the top end of the blowout preventer main body; the sealing ring group comprises a primary sealer and a secondary sealer; the automatic deviation adjusting sealing device group comprises a first-stage automatic deviation adjusting sealing device and a second-stage automatic deviation adjusting sealing device; the first-stage sealer, the first-stage automatic deviation adjusting sealer, the second-stage sealer, the channel and the second-stage automatic deviation adjusting sealer are concentric and are provided with a pore passage for the oil pumping polished rod to pass through. The utility model provides a double containment, automatic tuningout compensation and two kinds of open flow shut-in modes.
Description
Technical Field
The utility model relates to a dual containment automatic deviation adjustment compensation well head preventer that is used for high contain associated gas and gas drive oil field block oil recovery well head.
Background
The gas production reasons of oil wells in various blocks of the oil field are different, and on one hand, the high-yield block generally has the problem of large associated gas content; on the other hand, a part of oil fields adopt gas drive oil extraction to improve the oil field recovery ratio, and adopt a large-scale fracturing mode to extract oil and increase injection, which brings high oil well yield and causes the problem of gas channeling of a part of oil wells.
Conventional pumper producing wells employ conventional seal cartridges for sealing the well head, which are typically directed to liquids, i.e., oil field production fluids (including crude oil and water). Because it is sealed with the polished rod in contact, it can only reach the semi-sealed state with lower pressure bearing grade. When the gas production rate of the oil well is large, the pressure limit of the sealing box can be broken through, and the problem of gas channeling of a wellhead is caused. When the gas is fleed, the pressure is suddenly increased, and the fluid in the well breaks through the well mouth sealing box, so that pollution and dangerous conditions are caused. A set of equipment and a process are urgently needed to solve the problem, and powerful technical support is provided for improving the oil field recovery ratio in an oil field high-yield block and gas drive oil recovery.
The double-seal automatic deviation adjusting wellhead blowout preventer is designed aiming at the problems of large associated gas content in a high-yield block and oil well gas channeling caused by adopting a gas drive oil production block. The device structurally designs two sets of half sealing devices, two self-deflection sealing ring structures and a set of half/full sealing blowout preventer. The normal sealing of the pumping unit during normal operation is realized, and the automatic deviation adjustment sealing is realized when a polished rod of the pumping unit is eccentric, so that the upper and lower double-stage sealing is realized, and the normal operation of the pumping unit is guaranteed; when the pumping unit generates gas channeling, the pumping unit can be shut down, and a blowout preventer is closed to reach a semi-closed state; when the gas channeling is serious, the oil pumping machine can be shut down, the polished rod is lowered, the blowout preventer is completely closed, the well mouth full-sealing state is achieved, the possible breakthrough port of the gas channeling is cut off, and pollution and dangerous situations caused by the gas channeling are prevented.
Disclosure of Invention
The utility model aims at providing a simple structure to above-mentioned problem, the material dependable performance can partly seal, can totally seal, and the leakproofness is reliable, and functional design is reasonable, easy operation, the dual containment automatic deviation adjustment compensation well head preventer of characteristics such as low price.
The technical scheme of the utility model lies in:
a double-seal automatic deviation-adjusting compensation wellhead blowout preventer comprises a blowout preventer main body, wherein a lower joint is connected to the bottom end of the blowout preventer main body; the blowout preventer main body is a circular tube; two sides of the two-way valve are provided with occlusion sealing plugs, and the middle of the two occlusion sealing plugs is provided with a movable channel; both sides of the occlusion sealing plug are connected with hand wheel rods, and the end parts of the hand wheel rods are connected with hand wheels; the blowout preventer further comprises a sealing device group connected to the top end of the blowout preventer main body; the sealing ring group comprises a primary sealer and a secondary sealer; the secondary sealer is connected with the top end of the blowout preventer main body; the automatic deviation adjusting sealing device group comprises a first-stage automatic deviation adjusting sealing device and a second-stage automatic deviation adjusting sealing device; the primary automatic deviation adjusting sealing device/the secondary automatic deviation adjusting sealing device comprises a deviation adjusting sealing ring and a deviation adjusting steel ring arranged on the deviation adjusting sealing ring; the primary automatic deviation adjusting sealing device is arranged between the primary sealer and the secondary sealer; the second-stage automatic deviation-adjusting sealing device is arranged between the bottom end of the blowout preventer main body and the lower connector; the first-stage sealer, the first-stage automatic deviation adjusting sealer, the second-stage sealer, the channel and the second-stage automatic deviation adjusting sealer are concentric and are provided with a pore passage for the oil pumping polished rod to pass through.
The primary sealer/the secondary sealer comprises a sealer cover, a rubber ring pressing pad and a sealing rubber ring group which are sequentially connected from top to bottom; the center of the first-stage sealer/the second-stage sealer is provided with a pore passage for the oil pumping polished rod to pass through; a circular hole is formed in the center of the sealing rubber ring group, and the aperture of the circular hole is equal to the diameter of the pore passage and is concentric; the primary sealer, the primary automatic deviation-adjusting sealing device, the secondary sealer, the blowout preventer main body, the secondary automatic deviation-adjusting sealing device and the lower connector are sequentially connected.
The primary sealer comprises a primary sealer cover, a primary rubber ring pressing pad and a primary sealing rubber ring group which are sequentially connected from top to bottom; the second grade sealer includes from last second grade sealer lid, second grade rubber ring pressure pad and the second grade sealing rubber ring group that connects gradually down.
The primary automatic deviation adjusting sealing device comprises a primary deviation adjusting sealing ring and a primary deviation adjusting steel ring arranged on the primary deviation adjusting sealing ring; the two-stage automatic deviation-adjusting sealing device comprises a two-stage deviation-adjusting sealing ring and a two-stage deviation-adjusting steel ring arranged on the two-stage deviation-adjusting sealing ring.
The technical effects of the utility model reside in that:
the utility model provides a double-sealing, automatic deviation-adjusting compensation and two blowout shut-in modes; on one hand, when the pumping unit works, the sealer set and the pumping polish rod generate contact sealing; on the other hand, the automatic deviation-adjusting sealing device group performs sealing compensation on the rest of the sealing unit group, so that a better dynamic sealing state is realized in the movement process of the polished pumping rod; on the other hand, due to the reasons of gas channeling of the oil well and the like, when the blowout preventer needs to be closed, the oil pumping unit is closed, the hand wheel is rotated, the hand wheel rod pushes the meshing sealing plugs on the two sides in the blowout preventer main body to approach to the center, and the meshing sealing plugs hold the polish rod to realize meshing semi-sealing. When the blowout preventer needs to be used on site, the pumping unit can be stopped, the pumping polished rod is lowered, the hand wheel is rotated, the hand wheel rod pushes the meshing sealing plugs on the two sides in the blowout preventer body to approach to the center, and the meshing sealing plugs are completely and hermetically meshed under the condition of no polished rod, so that the blowout preventer is in a fully-sealed state.
Drawings
Fig. 1 is the utility model discloses a section view of double containment automatic deviation adjustment compensation well head preventer.
Reference numerals are as follows: 1. a primary sealer cap; 2. a primary rubber ring pressing pad; 3. a primary sealing rubber ring group; 4. a first-stage deviation adjusting sealing ring; 5. a first-level deviation adjusting steel ring; 6. a secondary sealer cover; 7. a secondary rubber ring pressing pad; 8. a secondary sealing rubber ring group; 9. a blowout preventer body; 10. engaging the sealing plug; 11. a hand wheel lever; 12. a hand wheel; 13. a secondary offset sealing ring; 14. a secondary deviation adjusting steel ring; 15. and a lower joint.
Detailed Description
Example 1
A double-sealing automatic deviation-adjusting compensation wellhead blowout preventer comprises a blowout preventer main body 9, wherein the bottom end of the blowout preventer main body 9 is connected with a lower joint 15; the blowout preventer body 9 is a circular tube; two sides of the two occlusion sealing plugs are provided with occlusion sealing plugs 10, and the middle of the two occlusion sealing plugs 10 is provided with a movable channel; both sides of the occlusion sealing plug 10 are connected with hand wheel rods 11, and the end parts of the hand wheel rods 11 are connected with hand wheels 12; also comprises a sealing group connected with the top end of the blowout preventer main body 9; the sealing ring group comprises a primary sealer and a secondary sealer; the secondary sealer is connected with the top end of the blowout preventer main body 9; the automatic deviation adjusting sealing device group comprises a first-stage automatic deviation adjusting sealing device and a second-stage automatic deviation adjusting sealing device; the primary automatic deviation adjusting sealing device/the secondary automatic deviation adjusting sealing device comprises a deviation adjusting sealing ring and a deviation adjusting steel ring arranged on the deviation adjusting sealing ring; the primary automatic deviation adjusting sealing device is arranged between the primary sealing device and the secondary sealing device; the secondary automatic deviation-adjusting sealing device is arranged between the bottom end of the blowout preventer main body 9 and the lower joint 15; the first-stage sealer, the first-stage automatic deviation adjusting sealer, the second-stage sealer, the channel and the second-stage automatic deviation adjusting sealer are concentric and are provided with a pore passage for the oil pumping polished rod to pass through.
The specific implementation process of the embodiment is as follows:
when the blowout preventer is opened, the oil pumping polished rod reciprocates up and down in the pore channel; when the blowout preventer needs to be closed, the hand wheel 12 is rotated, and the hand wheel rod 11 pushes the meshing sealing plugs 10 on the two sides in the blowout preventer main body 9 to realize half-sealing meshing sealing; when the oil pumping unit is required on site, the oil pumping unit can be stopped, the oil pumping polished rod is lowered, the hand wheel 12 is rotated, the hand wheel rod 11 pushes the meshing sealing plugs 10 on the two sides in the blowout preventer main body 9 to approach to the center, complete sealing meshing of the meshing sealing plugs 10 is realized under the condition of no light rod, and the full sealing state of the blowout preventer is achieved.
The oil pumping polished rod is a smooth metal rod with the length of about 9m, when the oil pumping unit works, the oil pumping polished rod does up-and-down reciprocating mechanical motion, and the oil pumping polished rod is often eccentric due to the influence of the conditions such as the smoothness of the surface of the oil pumping polished rod, the stress of a rod column, the alignment of the oil pumping unit and the like in the motion process. When the oil pumping polished rod deviates from the center, the oil pumping polished rod is pressed to one side, the deviation adjusting sealing ring and the deviation adjusting steel ring are deformed, meanwhile, a clearance is generated on the opposite side, and the deviated side of the oil pumping polished rod pushes the deviation adjusting sealing ring to supplement the clearance generated by the eccentricity of the oil pumping polished rod due to the elastic characteristic of the deviation adjusting steel ring, so that the automatic deviation adjusting sealing is realized, and the sealing compensation effect on the primary sealer/the secondary sealer is realized.
Example 2
On the basis of embodiment 1, the method further comprises the following steps:
the primary sealer/the secondary sealer comprises a sealer cover, a rubber ring pressing pad and a sealing rubber ring group which are sequentially connected from top to bottom; the center of the first-stage sealer/the second-stage sealer is provided with a pore passage for the oil pumping polish rod to pass through; a circular hole is formed in the center of the sealing rubber ring group, and the diameter of the circular hole is equal to the diameter of the pore passage and is concentric; the primary sealer, the primary automatic deviation-adjusting sealing device, the secondary sealer, the blowout preventer main body 9, the secondary automatic deviation-adjusting sealing device and the lower joint 15 are sequentially connected.
The oil pumping polished rod and the sealing rubber ring group are in contact sealing, so that a sealing effect is realized on fluid in a wellhead, a first-stage sealer and a second-stage sealer are applied to two-stage sealing, a dual-sealing and dual-sealing effect is realized, and the problem of overflow of fluid in a well during normal production is prevented.
Example 3
The primary sealer comprises a primary sealer cover 1, a primary rubber ring pressing pad 2 and a primary sealing rubber ring group 3 which are sequentially connected from top to bottom; the secondary sealer comprises a secondary sealer cover 6, a secondary rubber ring pressing pad 7 and a secondary sealing rubber ring group 8 which are sequentially connected from top to bottom. The primary automatic deviation adjusting sealing device comprises a primary deviation adjusting sealing ring 4 and a primary deviation adjusting steel ring 5 arranged on the primary deviation adjusting sealing ring 4; the secondary automatic deviation-adjusting sealing device comprises a secondary deviation-adjusting sealing ring 13 and a secondary deviation-adjusting steel ring 14 arranged on the secondary deviation-adjusting sealing ring 13.
The primary sealing rubber ring group 3/the secondary sealing rubber ring group 8 consists of a plurality of independent sealing rubber rings; the surface of the oil pumping polished rod and each contacted sealing rubber ring form a dynamic sealing combination, and because the sealing rubber rings have elasticity, each sealing rubber ring can generate tiny shape change along with the shape of the contacted oil pumping polished rod, so that a plurality of sealing rubber rings form a dynamic sealing state along with the up-and-down reciprocating motion of the oil pumping polished rod, and the gaps are compensated mutually. Considering that the reciprocating distance of the oil pumping polished rod is different when the oil pumping polished rod is arranged in different strokes, the first-stage sealer can meet the requirement of dynamic sealing when the oil pumping polished rod runs in a short stroke, and the dynamic sealing can be influenced to a certain extent when the oil pumping polished rod runs in a long stroke, so that the sealer sets of the first-stage sealer and the second-stage sealer are designed, and the sealer sets perform sealing compensation with each other when the oil pumping machine runs in a long stroke, so that double sealing protection is formed, and the optimal dynamic sealing effect is achieved. Similarly, an automatic deviation-adjusting sealing device group of a first-stage automatic deviation-adjusting sealing device and a second-stage automatic deviation-adjusting sealing device is designed, the bevel angle generated by insufficient sealing caused by the inclination of the oil-pumping polished rod is compensated, and the well mouth is sealed better.
Claims (4)
1. A double-seal automatic deviation-adjusting compensation wellhead blowout preventer comprises a blowout preventer main body (9), wherein the bottom end of the blowout preventer main body (9) is connected with a lower joint (15); the blowout preventer main body (9) is a circular tube; two sides of the two-way pipe are provided with occlusion sealing plugs (10), and the middle of the two occlusion sealing plugs (10) is provided with a movable channel; both sides of the occlusion sealing plug (10) are connected with hand wheel rods (11), and the end parts of the hand wheel rods (11) are connected with hand wheels (12); the method is characterized in that:
the blowout preventer further comprises a sealing device group connected to the top end of the blowout preventer main body (9); the sealer group comprises a primary sealer and a secondary sealer; the secondary sealer is connected with the top end of the blowout preventer main body (9);
the automatic deviation adjusting sealing device group comprises a primary automatic deviation adjusting sealing device and a secondary automatic deviation adjusting sealing device; the primary automatic deviation adjusting sealing device/the secondary automatic deviation adjusting sealing device comprises a deviation adjusting sealing ring and a deviation adjusting steel ring arranged on the deviation adjusting sealing ring; the primary automatic deviation adjusting sealing device is arranged between the primary sealer and the secondary sealer; the secondary automatic deviation adjusting sealing device is arranged between the bottom end of the blowout preventer main body (9) and the lower joint (15);
the primary sealer, the primary automatic deviation-adjusting sealer, the secondary sealer, the channel and the secondary automatic deviation-adjusting sealer share the same center and are provided with a pore channel for the oil-pumping polished rod to pass through.
2. The dual seal auto-bias compensating wellhead blowout preventer of claim 1, wherein: the primary sealer/the secondary sealer comprise a sealer cover, a rubber ring pressing pad and a sealing rubber ring group which are sequentially connected from top to bottom; the center of the first-stage sealer/the second-stage sealer is provided with a pore passage for the oil pumping polish rod to pass through; a circular hole is formed in the center of the sealing rubber ring group, and the diameter of the circular hole is equal to the diameter of the pore passage and is concentric; the primary sealer, the primary automatic deviation-adjusting sealing device, the secondary sealer, the blowout preventer main body (9), the secondary automatic deviation-adjusting sealing device and the lower connector (15) are sequentially connected.
3. The dual seal automatic offset compensation wellhead blowout preventer as claimed in claim 2, wherein: the primary sealer comprises a primary sealer cover (1), a primary rubber ring pressing pad (2) and a primary sealing rubber ring group (3) which are sequentially connected from top to bottom; the secondary sealer comprises a secondary sealer cover (6), a secondary rubber ring pressing pad (7) and a secondary sealing rubber ring group (8) which are sequentially connected from top to bottom.
4. The dual seal auto-bias compensating wellhead blowout preventer of claim 3, wherein: the primary automatic deviation adjusting sealing device comprises a primary deviation adjusting sealing ring (4) and a primary deviation adjusting steel ring (5) arranged on the primary deviation adjusting sealing ring (4); the two-stage automatic deviation-adjusting sealing device comprises a two-stage deviation-adjusting sealing ring (13) and a two-stage deviation-adjusting steel ring (14) arranged on the two-stage deviation-adjusting sealing ring (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221695760.5U CN217602621U (en) | 2022-07-04 | 2022-07-04 | Double-seal automatic deviation-adjusting compensation wellhead blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221695760.5U CN217602621U (en) | 2022-07-04 | 2022-07-04 | Double-seal automatic deviation-adjusting compensation wellhead blowout preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217602621U true CN217602621U (en) | 2022-10-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221695760.5U Active CN217602621U (en) | 2022-07-04 | 2022-07-04 | Double-seal automatic deviation-adjusting compensation wellhead blowout preventer |
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| Country | Link |
|---|---|
| CN (1) | CN217602621U (en) |
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2022
- 2022-07-04 CN CN202221695760.5U patent/CN217602621U/en active Active
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