CN210685915U - Double-layer sealing structure of oil pipe head of drilling and production equipment for offshore oil field - Google Patents
Double-layer sealing structure of oil pipe head of drilling and production equipment for offshore oil field Download PDFInfo
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- CN210685915U CN210685915U CN201921263964.XU CN201921263964U CN210685915U CN 210685915 U CN210685915 U CN 210685915U CN 201921263964 U CN201921263964 U CN 201921263964U CN 210685915 U CN210685915 U CN 210685915U
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Abstract
The utility model relates to the technical field of oil field drilling equipment, in particular to a double-layer sealing structure of an oil pipe head of ocean oil field drilling equipment, which comprises an oil pipe head, wherein a valve flange is arranged above the oil pipe head, and a sealing device is arranged between the oil pipe head and the valve flange; the top surface of the flange positioned above the oil pipe head is provided with a first sealing ring, and the bottom surface of the valve flange is provided with a second sealing ring; the double-layer sealing structure of the oil pipe head of the drilling and production equipment for the offshore oil field changes the mode that the traditional valve flange is directly connected with the oil pipe head through the sealing device arranged between the oil pipe head and the valve flange, and meanwhile, the sealing ring and the sealing assembly which are arranged on the sealing device simultaneously can play a double-layer sealing effect on the joint of the oil pipe head and the valve flange, so that the oil leakage or the air leakage condition can be avoided, and the problem that the existing drilling and production equipment oil pipe head is not tightly connected with a valve is solved.
Description
Technical Field
The utility model relates to an oil field drilling equipment technical field specifically is a double-deck seal structure of oil pipe head is equipped in marine oil field drilling.
Background
The tubing head is a device part which is connected with the casing head at the uppermost layer and an oil (gas) production tree so as to suspend the tubing and seal the annular space between the tubing and the casing; the oil pipe head is positioned above the casing head, comprises a casing four-way joint and an oil pipe hanger and is used for hanging an oil pipe, a downhole tool and a sealing oil ring annular space which are put into a well; it is used for drilling and production in ocean oil field;
when the existing drilling and production equipment tubing head is used, the situation that connection is not tight is often caused when the tubing head is connected with a valve above the tubing head, and oil leakage and air leakage are caused due to the fact that the connection is not tight.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a double-deck seal structure of oil pipe head is equipped in marine oil field drilling and production to the untight problem is connected with the valve to the current drilling and production equipment oil pipe head that proposes in solving above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a double-layer sealing structure of an oil pipe head of drilling and production equipment of an offshore oil field comprises the oil pipe head, wherein a valve flange is arranged above the oil pipe head, and a sealing device is arranged between the oil pipe head and the valve flange; the top surface of the flange positioned above the oil pipe head is provided with a first sealing ring, and the bottom surface of the valve flange is provided with a second sealing ring; the sealing device comprises a shell, wherein sealing cavities are symmetrically arranged on the top surface and the bottom surface of the shell, a plurality of through holes are formed in the sealing cavities at equal intervals in an annular shape, a sealing groove is formed in each sealing cavity, and a round hole is formed in the center of the bottom surface of each sealing cavity; still be equipped with seal assembly in the sealed chamber, seal assembly includes two clamp plates that are parallel to each other, and one of them the clamp plate with sealed chamber passes through rivet fixed connection, set up flutedly on the clamp plate, two be equipped with flexible pipe between the clamp plate, flexible pipe includes a plurality of creases that are the equidistant distribution of annular and end to end and connect gradually, be equipped with the spring in the flexible pipe.
Preferably, the first sealing ring is in inserted fit with the sealing groove located below.
Preferably, the second sealing ring is in insertion fit with the sealing groove located above.
Preferably, the size of the seal cavity is matched with the size of the flange of the valve and the flange of the oil pipe head respectively.
Preferably, a plurality of connecting bolts which are distributed in an annular equal interval mode are further arranged on the valve flange, penetrate through the valve flange, the through holes and the flange of the oil pipe head in sequence, and are respectively in threaded connection with the valve flange and the flange of the oil pipe head.
Preferably, the groove is communicated with the round hole.
Compared with the prior art, the beneficial effects of the utility model are that: the double-layer sealing structure of the oil pipe head of the drilling and production equipment for the offshore oil field changes the mode that the traditional valve flange is directly connected with the oil pipe head through the sealing device arranged between the oil pipe head and the valve flange, and meanwhile, the sealing ring and the sealing assembly which are arranged on the sealing device simultaneously can play a double-layer sealing effect on the joint of the oil pipe head and the valve flange, so that the oil leakage or the air leakage condition can be avoided, and the problem that the existing drilling and production equipment oil pipe head is not tightly connected with a valve is solved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the overall explosion structure of the present invention;
fig. 3 is a schematic view of an explosion structure of the sealing device of the present invention;
fig. 4 is a schematic structural view of the sealing assembly of the present invention;
FIG. 5 is an enlarged schematic view of the structure at A of the present invention;
fig. 6 is a schematic structural view of the middle valve flange of the present invention.
In the figure: 1. a tubing head; 11. a first seal ring; 2. a valve flange; 21. a second seal ring; 3. a sealing device; 31. a housing; 311. sealing the cavity; 312. a through hole; 313. a sealing groove; 314. a circular hole; 32. a seal assembly; 321. pressing a plate; 3211. a groove; 322. a telescopic pipe; 3221. folding; 323. a spring; 4. and connecting the bolts.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Example 1
A double-layer sealing structure of an oil pipe head of drilling and production equipment of an offshore oil field is shown in figures 1 to 6 and comprises an oil pipe head 1, a valve flange 2 is arranged above the oil pipe head 1, and a sealing device 3 is arranged between the oil pipe head 1 and the valve flange 2; the top surface of the flange above the oil pipe head 1 is provided with a first sealing ring 11, the first sealing ring 11 is tightly welded with the top surface of the flange above the oil pipe head 1, the bottom surface of the valve flange 2 is provided with a second sealing ring 21, and the second sealing ring 21 is tightly welded with the bottom surface of the valve flange 2; the sealing device 3 comprises a shell 31, wherein a sealing cavity 311 is symmetrically arranged on the top surface and the bottom surface of the shell 31, a plurality of through holes 312 are annularly and equidistantly formed in the sealing cavity 311, a sealing groove 313 is also formed in the sealing cavity 311, and a round hole 314 is formed in the center of the bottom surface of the sealing cavity 311; still be equipped with seal assembly 32 in the seal chamber 311, seal assembly 32 includes two clamp plates 321 that are parallel to each other, and one of them clamp plate 321 passes through rivet fixed connection with seal chamber 311, has seted up recess 3211 on the clamp plate 321, is equipped with flexible pipe 322 between two clamp plates 321, and clamp plate 321 closely bonds with the both ends of flexible pipe 322, and flexible pipe 322 includes a plurality of crease 3221 that are the equidistant distribution of annular and connect gradually end to end, is equipped with spring 323 in the flexible pipe 322.
Specifically, the first sealing ring 11 is in insertion fit with the sealing groove 313 located below, and the first sealing ring 11 and the sealing groove 313 have a good sealing effect.
Specifically, the second sealing ring 21 is inserted into and matched with the sealing groove 313 located above, and the second sealing ring 21 and the sealing groove 313 have a good sealing effect.
Specifically, the size of the sealing cavity 311 is respectively matched with the size of the flange of the valve flange 2 and the size of the flange of the tubing head 1, which facilitates the housing 31 to perform a connection function with good sealing performance between the valve flange 2 and the tubing head 1.
Furthermore, a plurality of connecting bolts 4 which are distributed annularly at equal intervals are further arranged on the valve flange 2, the connecting bolts 4 sequentially penetrate through the valve flange 2, the through holes 312 and the flange of the oil pipe head 1, the connecting bolts 4 are respectively in threaded connection with the flange of the valve flange 2 and the flange of the oil pipe head 1, and the valve flange 2, the sealing device 3 and the oil pipe head 1 can be conveniently connected through the bolts 3.
In addition, the groove 3211 is communicated with the circular hole 314, so that a pipeline on the oil pipe head 1 can be conveniently communicated with the valve flange 2 through the groove 3211 and the circular hole 314, and fuel oil and the like can be conveniently conveyed.
It should be noted that the pressure plate 32 in this embodiment is made of rubber, which has good trouble and can increase the sealing performance between the valve flange 2 and the upper sealing cavity 31, and between the flange of the tubing head 1 and the lower sealing cavity 31.
In addition, the telescopic pipe 322 in this embodiment is an integrally formed structure, and meanwhile, the telescopic pipe 322 has the characteristics of contraction and extension, so when the flange of the tubing head 1 abuts against the sealing assembly 32, the telescopic pipe 322 contracts, and the pressing plate 321 abuts against the flange of the tubing head 1, and the sealing performance is good.
Before the double-layer sealing structure of the oil pipe head of the offshore oil field drilling and production equipment is used, a user firstly aligns and places the sealing cavity 311 located below on the shell 31 with the flange of the oil pipe head 1, at the moment, the first sealing ring 11 located on the flange located above the oil pipe head 1 is inserted into the sealing groove 313 located below, meanwhile, the pressing plate 321 on the sealing assembly 32 is abutted against the flange of the oil pipe head 1, the spring 323 is synchronously compressed, the telescopic pipe 322 is extruded and contracted, then the user places the valve flange 2 valve into the sealing cavity 311 located above, simultaneously, the second sealing ring 21 is inserted into the sealing groove 313 located above, meanwhile, the sealing assembly 32 located above is compressed, and finally, the user sequentially penetrates the plurality of connecting bolts 4 through the valve flange 2, the through hole 312 and the flange of the oil pipe head 1 and screws up, and installation can be completed.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a double-deck seal structure of marine oil field drilling and production equipment tubing head, includes tubing head (1), its characterized in that: a valve flange (2) is arranged above the oil pipe head (1), and a sealing device (3) is arranged between the oil pipe head (1) and the valve flange (2); the top surface of the flange above the oil pipe head (1) is provided with a first sealing ring (11), and the bottom surface of the valve flange (2) is provided with a second sealing ring (21); the sealing device (3) comprises a shell (31), wherein sealing cavities (311) are symmetrically arranged on the top surface and the bottom surface of the shell (31), a plurality of through holes (312) are annularly and equidistantly formed in the sealing cavities (311), a sealing groove (313) is formed in the sealing cavity (311), and a round hole (314) is formed in the center of the bottom surface of the sealing cavity (311); still be equipped with seal assembly (32) in sealed chamber (311), seal assembly (32) include two clamp plates (321) that are parallel to each other, and one of them clamp plate (321) with sealed chamber (311) pass through rivet fixed connection, recess (3211) have been seted up on clamp plate (321), two be equipped with flexible pipe (322) between clamp plate (321), flexible pipe (322) include a plurality of crease (3221) that are the equidistant distribution of annular and end to end and connect gradually, be equipped with spring (323) in flexible pipe (322).
2. The double-layer sealing structure of the oil pipe head of the offshore oil field drilling and production equipment of claim 1, characterized in that: the first sealing ring (11) is in inserted fit with the sealing groove (313) located below.
3. The double-layer sealing structure of the oil pipe head of the offshore oil field drilling and production equipment of claim 1, characterized in that: the second sealing ring (21) is in insertion fit with the sealing groove (313) positioned above.
4. The double-layer sealing structure of the oil pipe head of the offshore oil field drilling and production equipment of claim 1, characterized in that: the size of the sealing cavity (311) is respectively matched with the size of the valve flange (2) and the size of the flange of the oil pipe head (1).
5. The double-layer sealing structure of the oil pipe head of the offshore oil field drilling and production equipment of claim 1, characterized in that: still be equipped with a plurality of connecting bolt (4) that are the equidistant distribution of annular on valve flange (2), connecting bolt (4) pass in proper order the flange of valve flange (2), through-hole (312) and oil pipe head (1), just connecting bolt (4) respectively with valve flange (2) with the flange threaded connection of oil pipe head (1).
6. The double-layer sealing structure of the oil pipe head of the offshore oil field drilling and production equipment of claim 1, characterized in that: the groove (3211) is communicated with the round hole (314).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921263964.XU CN210685915U (en) | 2019-08-06 | 2019-08-06 | Double-layer sealing structure of oil pipe head of drilling and production equipment for offshore oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921263964.XU CN210685915U (en) | 2019-08-06 | 2019-08-06 | Double-layer sealing structure of oil pipe head of drilling and production equipment for offshore oil field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210685915U true CN210685915U (en) | 2020-06-05 |
Family
ID=70894451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921263964.XU Active CN210685915U (en) | 2019-08-06 | 2019-08-06 | Double-layer sealing structure of oil pipe head of drilling and production equipment for offshore oil field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210685915U (en) |
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2019
- 2019-08-06 CN CN201921263964.XU patent/CN210685915U/en active Active
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