CN201041013Y - Well mouth coupling device - Google Patents
Well mouth coupling device Download PDFInfo
- Publication number
- CN201041013Y CN201041013Y CNU2007201404794U CN200720140479U CN201041013Y CN 201041013 Y CN201041013 Y CN 201041013Y CN U2007201404794 U CNU2007201404794 U CN U2007201404794U CN 200720140479 U CN200720140479 U CN 200720140479U CN 201041013 Y CN201041013 Y CN 201041013Y
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- China
- Prior art keywords
- thread
- well head
- flange
- main body
- coupling arrangement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a wellhead connecting device consisting of a flanged joint, a main body, a slip hanger, a flanged filling-up plate, a vent valve and a conversion joint, etc. The main body is connected to a surface casing and the flanged joint respectively through the screw of the lower part and the screw of the upper part of the cavity, and also fulfills the control to the heated extension of the inner casing. The lateral ring groove of the slip hanger is provided with a lock ring therein which is matched with the groove in the cavity of the main body to realize the axial lock of the slip hanger in the cavity. The seal with the cavity of the main body and the inner casing is realized respectively by the outer sealing and the inner sealing at the same time. The lower part of the main body is also provided with a through hole where the flanged filling-up plate, the vent valve and other accessories are installed. The utility model is of simple structure, easy installation, which reduces the complex degree of operation so that the reliability of the wellhead connecting device can be ensured.
Description
Technical field
The utility model relates to drilling well in a kind of petroleum works, completion practice wellhead assembly, the well head coupling arrangement that a kind of specifically and special well-completing process is supporting.
Background technology
At present, the viscous crude field exploitation in the China Petroleum development mainly is to take as the leading factor with the viscous crude intensified oil reduction technology of heavy crude heat extraction.This technology is to heat oil reservoir by the high-temperature steam that injects 280 ℃～370 ℃ in the stratum, and the viscous crude in the oil reservoir is heated back viscosity to be reduced significantly, and flow resistance reduces greatly, makes very convenient that exploitation becomes.But viscous crude heating exploitation technology has also been brought following problem when realizing the efficient exploitation of heavy crude reservoir:
1, under oil well casing is heated to 280 ℃～370 ℃ situation, can produce too high thermal stress, this will cause the damage in advance of production string, even oil well is scrapped.
2, under production string was heated to 280 ℃～370 ℃ situation, the elongation meeting of sleeve pipe caused hidden danger to well head.
Therefore, be to eliminate the adverse effect that heavy crude heat extraction technology is brought, generally adopt production string is applied prestressed method to reduce and to eliminate its harm.At present, the thermal recovery well head device with the prestressing techniques complete sets of Techniques that domestic oil-field thick-oil exploitation is adopted has two classes, and the one, the simple wellhead device of doughnut-shaped steel plate class, the 2nd, special-purpose heavy crude heat extraction casing head.Use the simple wellhead device of doughnut-shaped steel plate class, must lay down when well cementing operation that preventer just can be cemented the well and the fixed operation of production string, and the bonding strength deficiency of well head.And use the heavy crude heat extraction casing head, exist installation steps many, the shortcoming of complicated operation.
Summary of the invention
The utility model relates to a kind of well head linkage, its purpose is to provide a kind of oil well head linkage, blowout preventer needn't be laid down when being implemented in well cementing operation and just the fixed operation of cementing and inner layer sleeve can be carried out, and guarantee the bonding strength of well head, have simple to operate, it is convenient to install, the characteristics of increasing work efficiency.
The utility model is achieved in that this well head linkage, comprise flange socket, main body, slips hanger, slips, external seal, interior sealing, pressure ring, location lock ring, flange closure plate, drain valve, screw thread is arranged respectively at the top of lower body part and inner chamber, flange socket utilizes the external screw-thread of lower end to be connected with main body inner chamber top screw thread, main body is connected with surface pipe by lower thread, inner layer sleeve is hung fixing by the slips in the slips hanger, both sides are provided with intercommunicating pore, but adpting flange closure plate, drain valve annex.
The screw thread on the top of main body inner chamber is regular screw threads, or the petroleum casing pipe taper pipe thread.
The screw thread of lower body part is the used taper pipe thread of petroleum casing pipe, or the screw thread of lower body part, is internal thread, or external screw thread.
Connecting thread is arranged at the bottom of flange socket, and this connecting thread matches with the connecting thread on chamber body top, or the top of flange socket is a single flange, and the steel ring seal groove is arranged on the end face of this flange.
Have annular groove on the outer wall of slips hanger, or in the annular groove of slips hanger outer wall lock ring is installed, the material of lock ring is spring steel, aluminium alloys, rubber or engineering plastics.
Intercommunicating pore is that flange connects with the connecting mode of drain valve, flange closure plate, the steel ring sealing, or intercommunicating pore is that taper pipe thread connects with the connecting mode of drain valve, plug wire.
The bottom end face of slips hanger is equipped with sealing ring.
The material of the sealing ring that the bottom end face of slips hanger is installed is rubber, folder fabric rubber or polyurethane.
The type of the sealing ring that the bottom end face of slips hanger is installed is U-shaped, Y shape, L shaped or J-shaped sealing ring.
Of the present utility model simple in structure, easy for installation, reduced the complexity of operating, make the reliability of well head linkage that assurance arranged.
Description of drawings
Fig. 1 is the structural representation of the utility model well head linkage.
Fig. 2 is the syndeton schematic diagram of the utility model well head linkage and drilling well well head.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
Embodiment 1: main body is connected with surface pipe and flange socket respectively by the screw thread of bottom and the screw thread on inner chamber top, and realizes inner layer sleeve is subjected to the control of thermal stretching.Slips hanger utilizes slips to finish fixing inner layer sleeve by the step location at main body inner chamber middle part.In the annular groove in the slips hanger outside locking ring is installed, by with the groove of main body inner chamber, cooperate and realize the axial locking of slips hanger in inner chamber.Realize respectively simultaneously by external seal, interior sealing and main body inner chamber and inner layer sleeve between sealing.Also designed the side hole in lower body part, but annexes such as mounting flange closure plate, drain valve.
Embodiment 2: the utility model well head linkage, as shown in Figure 1, 2, form by flange socket (1), inner layer sleeve (2), main body (3), slips hanger (4), slips (5), interior sealing (6), pressure ring (7), flange closure plate (8), ring gasket (9), drain valve (10), external seal (11), location lock ring (12), connection sealing (13), crossover flange (14) etc.The inner chamber upper and lower of main body (3) has been designed screw thread respectively, the screw thread of main body in drilling process (3) by inner chamber top, connect sealing (13) and realize being tightly connected, finish connection by crossover flange (14) again with the drilling well blowout preventer with crossover flange (14).Screw thread by inner chamber top after completion can be connected with flange socket (1), realizes inner layer sleeve (2) is subjected to the control of thermal stretching.The design of inner chamber middle part has step, is used for the location of slips hanger (4).In the annular groove in slips hanger (4) outside locating ring (12) is installed, realizes the axial locking of slips hanger (4) in inner chamber, utilize slips (5) to finish fixing inner layer sleeve (2) by groove fit with main body (3) inner chamber.Sealing (6) and external seal (11) in utilizing simultaneously, the sealing between realization and inner layer sleeve (2) and main body (3) inner chamber.Intercommunicating pore has also been designed in inner chamber bottom in main body (3), but mounting flange closure plate (8), drain valve annexes such as (10).
Claims (9)
1. well head coupling arrangement, comprise flange socket, main body, slips hanger, slips, external seal, interior sealing, pressure ring, location lock ring, flange closure plate, drain valve, it is characterized in that: screw thread is arranged respectively at the top of lower body part and inner chamber, flange socket utilizes the external screw-thread of lower end to be connected with main body inner chamber top screw thread, main body is connected with surface pipe by lower thread, inner layer sleeve is hung fixing by the slips in the slips hanger, both sides are provided with intercommunicating pore, but adpting flange closure plate, drain valve annex.
2. a kind of well head coupling arrangement according to claim 1, it is characterized in that: the screw thread on the top of main body inner chamber is regular screw threads, or the petroleum casing pipe taper pipe thread.
3. well head coupling arrangement according to claim 1 is characterized in that: the screw thread of lower body part is the used taper pipe thread of petroleum casing pipe, or the screw thread of lower body part, is internal thread, or external screw thread.
4. a kind of well head coupling arrangement according to claim 1, it is characterized in that: connecting thread is arranged at the bottom of flange socket, this connecting thread matches with the connecting thread on chamber body top, or the top of flange socket is a single flange, and the steel ring seal groove is arranged on the end face of this flange.
5. a kind of well head coupling arrangement according to claim 1 is characterized in that: have annular groove on the outer wall of slips hanger, or in the annular groove of slips hanger outer wall lock ring is installed, the material of lock ring is spring steel, aluminium alloys, rubber or engineering plastics.
6. a kind of well head coupling arrangement according to claim 1 is characterized in that: intercommunicating pore is that flange connects with the connecting mode of drain valve, flange closure plate, the steel ring sealing, or intercommunicating pore is that taper pipe thread connects with the connecting mode of drain valve, plug wire.
7. a kind of well head coupling arrangement according to claim 1, it is characterized in that: the bottom end face of slips hanger is equipped with sealing ring.
8. a kind of well head coupling arrangement according to claim 1 is characterized in that: the material of the sealing ring that the bottom end face of slips hanger is installed is rubber, folder fabric rubber or polyurethane.
9. a kind of well head coupling arrangement according to claim 1 is characterized in that: the type of the sealing ring that the bottom end face of slips hanger is installed is U-shaped, Y shape, L shaped or J-shaped sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201404794U CN201041013Y (en) | 2007-03-15 | 2007-03-15 | Well mouth coupling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201404794U CN201041013Y (en) | 2007-03-15 | 2007-03-15 | Well mouth coupling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201041013Y true CN201041013Y (en) | 2008-03-26 |
Family
ID=39252719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201404794U Expired - Lifetime CN201041013Y (en) | 2007-03-15 | 2007-03-15 | Well mouth coupling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201041013Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015941A (en) * | 2011-09-26 | 2013-04-03 | 韦特柯格雷公司 | Guide funnel |
| CN107989566A (en) * | 2018-01-12 | 2018-05-04 | 科莱斯（天津）电热科技有限公司 | A kind of high-pressure well mouth T cables hanger sealing connection mechanism |
-
2007
- 2007-03-15 CN CNU2007201404794U patent/CN201041013Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015941A (en) * | 2011-09-26 | 2013-04-03 | 韦特柯格雷公司 | Guide funnel |
| US9328572B2 (en) | 2011-09-26 | 2016-05-03 | Vetco Gray, Inc. | Guide funnel |
| CN107989566A (en) * | 2018-01-12 | 2018-05-04 | 科莱斯（天津）电热科技有限公司 | A kind of high-pressure well mouth T cables hanger sealing connection mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080326 |
|
| CX01 | Expiry of patent term |