CN207377535U - A kind of Simple casing head - Google Patents
A kind of Simple casing head Download PDFInfo
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- CN207377535U CN207377535U CN201820182699.1U CN201820182699U CN207377535U CN 207377535 U CN207377535 U CN 207377535U CN 201820182699 U CN201820182699 U CN 201820182699U CN 207377535 U CN207377535 U CN 207377535U
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Abstract
The utility model discloses a kind of Simple casing heads, and the CASINGHEAD STRUCTURE is simple, possess normal sleeve head basic function.Ring seal is hung on to the inner cavity of casing head body, the ectonexine of petroleum pipeline is connected respectively, hole can bear the pressure of production string in ring seal, the pressure of casing head is utilized simultaneously, so that the sealing ring on ring seal will be formed between surface pipe and production string and sealed, extracting device of oil can be mounted directly by production string pipe collar after wellhead assembly installs, it is convenient and efficient.It by the setting for through hole of meeting an urgent need, is engaged, can be selected according to the difference of construction technology with tapped through hole, in case of emergency can be beaten or pressurize into annular chamber by emergent through hole, ensure the safety of drilling process.At low cost, since the structure of the casing head is simple, cost is only the 1/2 1/3 of normal sleeve head, greatly reduces cost of winning.
Description
Technical field
The utility model is related to casing head technical field more particularly to a kind of Simple casing heads.
Background technology
Casing head is used for the well head of fixed drilling well, wellhead casing pipe column is connected, to support protective casing and oil reservoir set
The gravity of pipe seals the annular space between each layer pipe, provides transition connection for installation preventer, tubing head, production tree, and leads to
Two side ports on casing head body are crossed, can carry out mending the construction operations such as crowded mud, monitoring and filling equilibrium liquid.
The casing head of high-pressure well is presently used for, due to the needs of its bearing capacity, it has to use complicated, installation
Difficulty is big and expensive casing head.But come for geological condition compared with the mesolow well stablized, pressure is relatively low, yield is not high
It says, the significant wastage of cost and complicated for operation is also obviously will result in using the said goods.Usually require that safety coefficient height, cost
Low casing head.
Utility model content
It is at low cost and safe and reliable the technical problem to be solved by the utility model is to provide a kind of simple in structure
A kind of Simple casing head.
In order to solve the above technical problems, technical solution adopted in the utility model is：
A kind of Simple casing head, including casing head body；It is characterized in that：Casing head body, including coaxial from top to bottom
Flange portion, hub portion and the threaded joints for connecting surface pipe of setting, the middle part of described sleeve pipe head body have
One is coaxial therewith the suspension cavities set, the both ends of suspension cavities respectively straight up, under extend to form two cylindrical cavities, it is described
Suspension cavities side wall has inverted taper surface, horizontal in the hub portion to offer connection its internal tapped through hole, the spiral shell
Silk plug is sealed and installed on line through hole；The casing head further includes a ring seal；Ring seal hangs on casing head body
The top of inner cavity, the top of ring seal is in matched cylindric with casing head chamber body, and its underpart is in inverted cone
Mesa-shaped, and the side wall of ring seal lower part can be clamped with suspension cavities side wall, to ring seal axial limiting；Ring packing
Device, the trig loop including ring type seal and arranged on ring type seal upper/lower terminal, the ring type seal and trig loop lead to
Attachment screw concatenation is crossed to fix；Ring seal has the rank for being socketed petroleum casing pipe pipe collar and production string on axis
Scalariform inner cavity, the bottom diameter of the stepped inner cavity is less than the upper end internal diameter, and the bottom diameter of stepped inner cavity is less than set
The internal diameter of tube head chamber body lower part so that annular chamber is formed between surface pipe and production string；Ring seal also wraps
Emergent through hole is included, the emergent through hole is arranged on ring seal vertically, lower end connection annular chamber, close on the emergent through hole
Envelope is equipped with closure.
Further technical solution is：The side wall of the suspension cavities include card access surface connected up and down, transition face and
Guide surface, the card access surface and transition face are in the card of inverted taper surface, the ring seal lower sides and suspension cavities
Junction had ebb interval, the card access surface and the taper phase of ring seal lower sides to contact and between guide surface
Together.
Further technical solution is：The card access surface is arranged in parallel with guide surface.
Further technical solution is：The tapped through hole includes axially uniformly distributed two.
Further technical solution is：Dovetail groove is equipped in the middle part of the upper and lower end face of the ring type seal, it is described
Trig loop is equipped with the pressurization part in embedded dovetail groove.
It is using advantageous effect caused by above-mentioned technical proposal：
The CASINGHEAD STRUCTURE is simple, possesses normal sleeve head basic function.Ring seal is hung on into casing head sheet
The inner cavity of body connects the ectonexine of petroleum pipeline respectively, and hole can bear the pressure of production string in ring seal, while utilize set
The pressure of tube head so that the sealing ring on ring seal will be formed between surface pipe and production string to be sealed, when well head fills
Extracting device of oil can be mounted directly by production string pipe collar by putting after installing, convenient and efficient.
It moreover, by the setting for through hole of meeting an urgent need, is engaged, can be selected according to the difference of construction technology with tapped through hole,
In case of emergency it can be beaten or pressurize into annular chamber by emergent through hole, ensure the safety of drilling process.
Also, the cost of the casing head is low, and since the structure of the casing head is simple, cost is only the 1/ of normal sleeve head
2-1/3 greatly reduces cost of winning.
Description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the structure diagram of ring seal described in the utility model；
Fig. 3 is the structure diagram of suspension cavities described in the utility model.
Specific embodiment
With reference to the attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu is fully described by, it is clear that described embodiment is the implementation of the part of the embodiment rather than whole of the utility model
Example.Based on the only embodiment in the utility model, those skilled in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Many details are elaborated in the following description in order to fully understand the utility model, but this practicality is new
Type can also be implemented using other different from other manner described here, and those skilled in the art can be without prejudice to this reality
With doing similar popularization in the case of new intension, therefore the utility model is from the limitation of following public specific embodiment.
As depicted in figs. 1 and 2, a kind of Simple casing head, including casing head body, for the table with preventer and petroleum pipeline
Layer casing is connected.Casing head body, including be from top to bottom coaxially disposed flange portion 11, hub portion 12 and for connection table
The threaded joints 13 of layer casing.The middle part of casing head body has one to be coaxial therewith the suspension cavities 14 set, suspension cavities 14
Both ends respectively straight up, under extend to form two cylindrical cavities, 14 side wall of suspension cavities has inverted taper surface.Its
In, flange portion 11 be standard flange, meet GB/T22513-2013 standards, can with standard preventer flanged joint, so as to
Ensure the safety of drilling process.It is horizontal in hub portion 12 to offer the tapped through hole 15 connected inside it, the tapped through hole
Silk plug is sealed and installed on 15.
The casing head further includes a ring seal.Ring seal is hung on by suspension cavities 14 in casing head body
The top of chamber is connected by conducting oneself with dignity with casing head body, specifically, the top of ring seal is in and casing head chamber body phase
What is coordinated is cylindric, and its underpart is in inverted frustum, and the side wall of ring seal lower part can be with 14 side wall card of suspension cavities
It connects so that suspension cavities 14 prevent ring seal from moving down ring seal axial limiting.
The structure of ring seal includes ring type seal 21 and the trig loop arranged on 21 upper/lower terminal of ring type seal
22, the ring type seal 21 and trig loop 22 are concatenated by attachment screw 23 and fixed, and attachment screw 23 includes circumferentially uniformly distributed
It is multiple, to strengthen the bonding strength of ring seal entirety, and by the trig loop 22 of upper/lower terminal to ring type seal 21
Different extruding dynamics realizes the crimp of ring type seal 21, can expand outwardly and realize ring seal and casing
Sealing between head chamber body.
And the effect of ring seal is mainly used for being connected with the production string of petroleum pipeline 102.Specifically, on its axis
With for being socketed the stepped inner cavity of petroleum casing pipe pipe collar 101 and production string 102, petroleum casing pipe pipe collar 101 passes through ladder
Shape inner cavity is subject to axial /V, is connected by conducting oneself with dignity with ring seal, and the bottom diameter of the stepped inner cavity is less than it
Upper-end inner diameter, and the bottom diameter of stepped inner cavity is less than the internal diameter of casing head chamber body lower part so that surface pipe and oil
Annular chamber 30 is formed between layer casing 102.
The leakproofness installed by detection device, can be determined by detecting the pressure in annular chamber 30.Annular chamber 30
Or slip casting passage, and in order to which slurries is made smoothly to walk downward and to prevent descending liquid up reverse osmosis, it is also necessary to annular chamber 30
Interior pressurization.And tapped through hole 15 can survey annular pressure when silk plug is installed, and at work remove silk plug, can be used as Xun Huan mud
The inlet of slurry.
In order to after generation accident can emergent management, ring seal further includes emergent through hole 24, anxious through hole 24 and spiral shell
The effect of line through hole 15 is identical, can also realize cycling well cementing operation, but corresponding construction technology is different when in use for the two.Institute
It states emergent through hole 24 to be arranged on ring seal vertically, lower end connection annular chamber 30, seals and be equipped on the emergent through hole 24
Closure 25.
The CASINGHEAD STRUCTURE is simple, possesses normal sleeve head basic function, and the major metal material of the structure is
35CrMo forging, by modifier treatment, hardness HB=174-235 is met the requirements of the standard.Ring seal is hung on into casing head
The inner cavity of body connects the ectonexine of petroleum pipeline respectively, and hole can bear the pressure of production string in ring seal, utilize simultaneously
The pressure of casing head so that the sealing ring on ring seal will be formed between surface pipe and production string to be sealed, and works as well head
Device can be mounted directly extracting device of oil by production string pipe collar after installing, convenient and efficient.
It moreover, by the setting for through hole of meeting an urgent need, is engaged, can be selected according to the difference of construction technology with tapped through hole,
In case of emergency it can be beaten or pressurize into annular chamber by emergent through hole, ensure the safety of drilling process.
Also, at low cost, since the structure of the casing head is simple, cost is only the 1/2-1/3 of normal sleeve head, significantly
Reduce cost of winning.
As shown in figure 3, for the concrete structure of suspension cavities 14, the side wall of suspension cavities 14 includes card access surface connected up and down
141st, transition face 142 and guide surface 143, the card access surface 141 and transition face 142 are in inverted taper surface, the annular
The card access surface 141 of sealer lower sides and suspension cavities 14 is to contacting and had ebb interval, the card between guide surface 143
Junction 141 is identical with the taper of ring seal lower sides, can prevent that ring seal lower sides and suspension cavities 14 are complete
Full connected blocks annular chamber 30.And in order to which slurries is enable smoothly to enter from emergent through hole 24 in annular chamber 30, card access surface
141 are arranged in parallel with guide surface 143.
Wherein, tapped through hole 15 includes axially uniformly distributed two, can into annular chamber 30 with and quick slip casting and
Can a slip casting, one pressurization, accelerate slurries flow down, prevent slurries up reverse osmosis.
And dovetail groove is equipped in the middle part of the upper and lower end face of ring type seal 21, the trig loop 22 is equipped with insertion
Pressurization part in dovetail groove.The deflection of ring type seal 21 is improved, makes sealing effect more preferable.21 material of ring type seal is
Nitrile rubber, oil resistant are high pressure resistant.
It the above is only the preferred embodiment of the utility model, anyone content according to the present utility model is to the utility model
A little simple modification, deformation and the equivalent substitution made each falls within the scope of protection of the utility model.
Claims (5)
1. a kind of Simple casing head, including casing head body；
It is characterized in that：
Casing head body, including be from top to bottom coaxially disposed flange portion (11), hub portion (12) and for connect surface layer set
The threaded joints (13) of pipe, the middle part of described sleeve pipe head body have one to be coaxial therewith the suspension cavities (14) set, suspension cavities
(14) both ends respectively straight up, under extend to form two cylindrical cavities, suspension cavities (14) side wall has inverted
Taper surface, it is horizontal on the hub portion (12) to offer connection its internal tapped through hole (15), on the tapped through hole (15)
It is sealed and installed with silk plug；
The casing head further includes a ring seal；
Ring seal, hangs on the top of casing head chamber body, and the top of ring seal is in and casing head chamber body
Matched cylindric, its underpart is in inverted frustum, and the side wall of ring seal lower part can be with suspension cavities (14) side
Wall is clamped, to ring seal axial limiting；
Ring seal, the trig loop (22) including ring type seal (21) and arranged on ring type seal (21) upper/lower terminal,
The ring type seal (21) and trig loop (22) are concatenated by attachment screw (23) to be fixed；
Ring seal has to be socketed the stepped interior of petroleum casing pipe pipe collar (101) and production string (102) on axis
Chamber, the bottom diameter of the stepped inner cavity is less than the upper end internal diameter, and the bottom diameter of stepped inner cavity is less than casing head sheet
The internal diameter of intracoelomic cavity lower part so that annular chamber (30) is formed between surface pipe and production string (102)；
Ring seal further includes emergent through hole (24), and the emergent through hole (24) is arranged on ring seal vertically, lower end
Annular chamber (30) is connected, sealing is equipped with closure (25) on the emergent through hole (24).
2. a kind of Simple casing head according to claim 1, it is characterised in that：The side wall of the suspension cavities (14) includes upper
Connected card access surface (141), transition face (142) and guide surface (143) down, the card access surface (141) and transition face (142) are equal
In inverted taper surface, the card access surfaces (141) of the ring seal lower sides and suspension cavities (14) to contact and with guiding
There is ebb interval, the card access surface (141) is identical with the taper of ring seal lower sides between face (143).
3. a kind of Simple casing head according to claim 2, it is characterised in that：The card access surface (141) and guide surface
(143) it is arranged in parallel.
4. a kind of Simple casing head according to claim 1, it is characterised in that：The tapped through hole (15) includes axial equal
Two of cloth.
5. a kind of Simple casing head according to claim 1, it is characterised in that：The ring type seal (21) it is upper and lower
Dovetail groove is equipped in the middle part of end face, the trig loop (22) is equipped with the pressurization part in embedded dovetail groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820182699.1U CN207377535U (en) | 2018-02-01 | 2018-02-01 | A kind of Simple casing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820182699.1U CN207377535U (en) | 2018-02-01 | 2018-02-01 | A kind of Simple casing head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207377535U true CN207377535U (en) | 2018-05-18 |
Family
ID=62333637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820182699.1U Active CN207377535U (en) | 2018-02-01 | 2018-02-01 | A kind of Simple casing head |
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| Country | Link |
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| CN (1) | CN207377535U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111335840A (en) * | 2020-05-18 | 2020-06-26 | 东营鑫华莲石油机械有限公司 | Slip type casing head |
| CN113107472A (en) * | 2021-05-11 | 2021-07-13 | 京鸿石油钻采工程技术有限公司 | Active magnetic distance measuring device and method suitable for well drilling collision prevention |
-
2018
- 2018-02-01 CN CN201820182699.1U patent/CN207377535U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111335840A (en) * | 2020-05-18 | 2020-06-26 | 东营鑫华莲石油机械有限公司 | Slip type casing head |
| CN111335840B (en) * | 2020-05-18 | 2020-07-28 | 东营鑫华莲石油机械有限公司 | Slip type casing head |
| CN113107472A (en) * | 2021-05-11 | 2021-07-13 | 京鸿石油钻采工程技术有限公司 | Active magnetic distance measuring device and method suitable for well drilling collision prevention |
| CN113107472B (en) * | 2021-05-11 | 2022-12-20 | 京鸿石油钻采工程技术有限公司 | Active magnetic distance measuring device and method suitable for well drilling collision prevention |
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