CN206655674U - A kind of casing head for oil extraction well head - Google Patents
A kind of casing head for oil extraction well head Download PDFInfo
- Publication number
- CN206655674U CN206655674U CN201720479191.3U CN201720479191U CN206655674U CN 206655674 U CN206655674 U CN 206655674U CN 201720479191 U CN201720479191 U CN 201720479191U CN 206655674 U CN206655674 U CN 206655674U
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- straight
- screw hole
- bar
- casing head
- hole
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Abstract
The utility model discloses a kind of casing head for oil extraction well head, including casing head body, an annulus is cased among described sleeve pipe head body, annulus inner ring face and the outer ring face of casing head body are welded and fixed, casing head body surface is provided with more than one screw hole, more than one screw hole structure distribution in a ring, vertically a through hole is provided with the bottom surface of screw hole, a straight-bar is provided with through hole, straight-bar one end may be contained within screw hole, the other end both passes through through hole and extends to the external world, and a bottom plate is fixedly mounted, bottom plate be arranged in parallel with the surface of annulus, there is a certain distance between the two, the distance is identical with one section in screw hole of straight-bar length.The utility model is simple in construction, easy to use, and financial cost is low, when being attached, can quickly find out which fixing bolt is not tightened, and is effectively avoided the appearance of unbalance stress situation, is added sealing effectiveness.
Description
Technical field
It the utility model is related to a kind of casing head for oil extraction well head.
Background technology
At present, in recovery of subterranean oil, for the relatively simple well of shallow well or low pressure well or casing programme, commonly use simple
Casing head cemented the well.In these existing casing heads, typically it is attached by more than one fixing bolt, but
It is the situation for easily occurring discontinuity when multiple fixing bolts are tightened during fixation, and the feelings of the unbalance stress
Condition is typically all detectable, but can be influenceed after much time using connection sealing effectiveness the problems such as.
Utility model content
To solve the above problems, the utility model provide it is a kind of simple in construction, it is easy to use, when being attached, energy
Quickly find out which fixing bolt is not tightened, effectively avoid the appearance of unbalance stress situation, add sealing effectiveness
The casing head for oil extraction well head.
To achieve the above object, the technical scheme that the utility model is taken is：
A kind of casing head for oil extraction well head, including casing head body, one is cased among described sleeve pipe head body
Annulus, annulus inner ring face and the outer ring face of casing head body are welded and fixed, and casing head body surface is provided with more than one spiral shell
Silk hole, more than one screw hole structure distribution in a ring, vertically a through hole is provided with the bottom surface of screw hole, is provided with through hole
One straight-bar, straight-bar one end may be contained within screw hole, and the other end both passes through through hole and extends to the external world, and a bottom plate is fixedly mounted,
Bottom plate be arranged in parallel with the surface of annulus, has a certain distance between the two, the distance with one section in screw hole
Straight-bar length is identical.
As preferable technical scheme, a groove is equipped with the inwall of through hole side, it is solid that straight-bar is right against groove
Dingan County fills a projection, and projection one end is all extended in groove, and a spring, bullet is fixedly mounted on bottom surface in the grooves in projection
Spring one end is fixedly connected with the bottom surface of groove.
As preferable technical scheme, straight-bar and annulus are made by metal material.
As preferable technical scheme, the top surface of straight-bar is less than the surface of casing head body.
The utility model has the advantages that：The utility model is simple in construction, easy to use, and financial cost is low,
When being attached, it can quickly find out which fixing bolt is not tightened, effectively avoid the appearance of unbalance stress situation, increase
Sealing effectiveness is added.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the utility model embodiment；
Fig. 2 is the top view of the utility model embodiment.
Embodiment
In order that the purpose of this utility model and advantage are more clearly understood, the utility model is entered with reference to embodiments
Row is further described.It should be appreciated that specific embodiment described herein is only to explain the utility model, and do not have to
In restriction the utility model.
As depicted in figs. 1 and 2, the utility model embodiment provides a kind of casing head for oil extraction well head, bag
Casing head body 5 is included, an annulus 9, the inner ring face of annulus 9 and the outer ring face of casing head body 5 are cased among described sleeve pipe head body 5
It is welded and fixed, the surface of casing head body 5 is provided with more than one screw hole 4, and more than one screw hole 4 in a ring divide by structure
Cloth, vertically a through hole 6 is provided with the bottom surface of screw hole 4, is provided with a straight-bar 7 in through hole 6, the one end of straight-bar 7 may be contained within screw
In hole 4, the other end both passes through through hole 6 and extends to the external world, and a bottom plate 8 is fixedly mounted, and bottom plate 8 is parallel with the surface of annulus 9
Set, have a certain distance between the two, the distance is identical with one section in screw hole 4 of the length of straight-bar 7.
In the present embodiment, a groove 2 is equipped with the inwall of the side of through hole 6, straight-bar 7 is right against at groove 2 fixed peace
A projection 1 is filled, the one end of projection 1 is all extended in groove 2, and a spring 3 is fixedly mounted on the bottom surface that projection 1 is located in groove 2,
Bottom surface of the one end of spring 3 with groove 2 is fixedly connected, and can be jacked up straight-bar by spring so that one section of straight-bar is in screw hole
In, and can reset straight-bar by spring.
In the present embodiment, straight-bar 7 and annulus 9 are made by metal material；The top surface of straight-bar 7 is less than casing head body 5
Surface.
Operation principle：First the surface of the flange on oil pipe and casing head body is offseted, screw hole and sleeve pipe on flange
Screw hole on head body is oppositely arranged, and at this moment, will between the two be fixed by fixing bolt, is being tightened the process of fixing bolt
In, fixing bolt can drive straight-bar to move down, until cause bottom plate on straight-bar bottom surface and the surface of annulus to offset, due to straight-bar with
The distance that the distance between annulus is located at straight-bar in screw hole is identical, and this explanation is after bottom plate and annulus offset, fixed spiral shell
Bottom surface of the bottom surface of bolt just with screw hole offsets, so by checking whether bottom plate with ring textures offsets which just can know that
Individual fixing bolt is not tightened also, so as to avoid discontinuity.
This specific implementation is simple in construction, easy to use, and financial cost is low, and when being attached, which can quickly find out
Fixing bolt is not tightened, and is effectively avoided the appearance of unbalance stress situation, is added sealing effectiveness.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (4)
- A kind of 1. casing head for oil extraction well head, it is characterised in that：Including casing head body, in described sleeve pipe head body Between be cased with an annulus, annulus inner ring face and the outer ring face of casing head body are welded and fixed, casing head body surface be provided with one More than screw hole, more than one screw hole structure distribution in a ring, vertically be provided with a through hole on the bottom surface of screw hole, it is logical A straight-bar is provided with hole, straight-bar one end may be contained within screw hole, and the other end both passes through through hole and extends to the external world, and is fixedly mounted One bottom plate, bottom plate be arranged in parallel with the surface of annulus, have a certain distance between the two, the distance with screw hole One section of straight-bar length is identical.
- 2. the casing head according to claim 1 for oil extraction well head, it is characterised in that：On the inwall of through hole side A groove is equipped with, straight-bar is right against groove and a projection is fixedly mounted, and projection one end is all extended in groove, and projection is located at A spring is fixedly mounted on bottom surface in groove, spring one end is fixedly connected with the bottom surface of groove.
- 3. the casing head according to claim 1 for oil extraction well head, it is characterised in that：Straight-bar and annulus are by gold Category material is made.
- 4. the casing head according to claim 1 for oil extraction well head, it is characterised in that：The top surface of straight-bar is less than set The surface of tube head body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720479191.3U CN206655674U (en) | 2017-04-21 | 2017-04-21 | A kind of casing head for oil extraction well head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720479191.3U CN206655674U (en) | 2017-04-21 | 2017-04-21 | A kind of casing head for oil extraction well head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206655674U true CN206655674U (en) | 2017-11-21 |
Family
ID=60320179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720479191.3U Active CN206655674U (en) | 2017-04-21 | 2017-04-21 | A kind of casing head for oil extraction well head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206655674U (en) |
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2017
- 2017-04-21 CN CN201720479191.3U patent/CN206655674U/en active Active
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