CN205189811U - Sealed wellhead assembly - Google Patents
Sealed wellhead assembly Download PDFInfo
- Publication number
- CN205189811U CN205189811U CN201521040881.6U CN201521040881U CN205189811U CN 205189811 U CN205189811 U CN 205189811U CN 201521040881 U CN201521040881 U CN 201521040881U CN 205189811 U CN205189811 U CN 205189811U
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- CN
- China
- Prior art keywords
- sub
- adapter flange
- crossover sub
- well
- tubing
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- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a sealed wellhead assembly is provided well head department and is used for sealed well head, a serial communication port, including adapter flange (4), fixed connection is on the first flange of oil pipe (9) upper portion, crossover sub (3), fixed connection is on the upper portion of adapter flange (4), hanging lifting sub (2), setting up in crossover sub (3), the bottom that hangs lifting sub (2) links to each other with sucker rod (6), will hang lifting sub (2) and can hang the sucker rod in placing the platform in crossover sub (3), plug (1), fixed connection can seal crossover sub (3) in order to realize that the well head is sealed on the top of crossover sub (3). The utility model discloses a sealed wellhead assembly realizes that the well head is sealed, prevents that oil gas from leaking, can satisfy the requirement that present pit shaft was handled, the leakage of stopping the intraductal oil gas medium of cover.
Description
Technical field
The present invention relates to a kind of oil field device, particularly relate to a kind of can the device of sealing wellhead.
Background technology
The oil well in many oil fields belongs to super-heavy oil deposit, needs on stream to carry out mixing rare, viscosity reduction production.But in actual production process, due to by artificial and mix the impact of the factors such as rare instrument, light oil mixing amount is unstable, it is large to mix rare fluctuation, the oil well viscous crude caused thus returns and happens occasionally, time serious oil well be forced to closing well, well of lying.
Because 350 production tree pressure-bearings are 35Mpa, top double disc high-tension blowout-prevention device pressure-bearing 21Mpa, when similar incidents occur, normal treatment measures utilize crane to coordinate to carry polished rod process pit shaft, and squeeze pressure must not more than 20Mpa.But part is aboveground to be returned serious, and pit shaft is blocked completely by oil is thick, squeeze pressure up to 40-50Mpa, therefore directly on to put forward the method for process inadvisable, belong to serious operation of violating well control code.
Now then need to carry out well head to exchange, installation high-voltage crossover sub, 350 production tree tubing head top 156 flanges need be removed with upper part when operating, high pressure crossover sub is connected with 350 production tree tubing hanger screw threads and tightens, sucker rod passes through suspension arrangement, be suspended on high pressure crossover sub inner, finally implement squeezing de-plugging operation.Although the method can realize high pressure injection operation, risk is higher, once tubing hanger O-ring seal lost efficacy, the hydraulic oil in sleeve pipe, gas just can hang position from tubing hanger and reveal, and cause well head out of control, blowout event occurs.
Summary of the invention
The object of the present invention is to provide a kind of can the device of sealing wellhead.
For achieving the above object, the concrete technical scheme of a kind of well top sealing device of the present invention is:
A kind of well top sealing device, is arranged on well head place for sealing wellhead, comprises adapter flange, be fixedly connected on tubing-head adapter flange top; Crossover sub, is fixedly connected on the top of adapter flange; Hang lifting sub, be arranged in crossover sub, the bottom hanging lifting sub is connected with sucker rod, is placed on by suspension lifting sub in the platform in crossover sub and can hangs sucker rod; Plug, is fixedly connected on the top of crossover sub, and salable crossover sub is to realize wellhead sealing.
Further, the steel ring for sealing is provided with between adapter flange and tubing-head adapter flange.
Further, adapter flange and tubing-head adapter flange are fixed together by hold-down bolt.
Further, hang on lifting sub and be provided with crossbeam, the landing inner diameter in crossover sub is less than crossbeam external diameter, hangs lifting sub and is placed on the platform of crossover sub by crossbeam.
Further, adapter flange comprises the different upper part of diameter and lower part, and the button-type of lower part and the button-type of tubing-head adapter flange match, and the screw thread bottom the button-type of upper part and high pressure crossover sub matches.
The advantage of a kind of well top sealing device of the present invention is:
1) utilize the steel ring on former production tree and adapter flange of the present invention, by hold-down bolt to make the upper and lower Flange joint of tubing head, realize wellhead sealing, prevent oil and gas leakage;
2) button-type of adapter flange upper part is consistent with high pressure crossover sub screw thread, can realize quick connection, sealing;
3) can meet the requirement of existing wellbore treatments, stop the leakage of oil gas medium in sleeve pipe, be the effective well control device of one.
Accompanying drawing explanation
Fig. 1 is the structural representation of well top sealing device of the present invention;
Fig. 2 is the structural representation of the well top sealing device be arranged on well head;
Fig. 3 is the structural representation of plug in Fig. 1;
Fig. 4 is the structural representation hanging lifting sub in Fig. 1;
Fig. 5 is the structural representation of crossover sub in Fig. 1;
Fig. 6 is the structural representation of adapter flange in Fig. 1;
Fig. 7 is the structural representation of steel ring in Fig. 2.
Detailed description of the invention
In order to better understand object of the present invention, structure and function, below in conjunction with accompanying drawing, further detailed description is done to a kind of well top sealing device of the present invention.
As shown in Figures 1 to 7, it shows for a kind of well top sealing device of the present invention, be arranged on well head place for sealing wellhead, comprise the adapter flange 4 being fixedly connected on tubing-head adapter flange 9 top, the steel ring 7 for sealing is provided with between adapter flange 4 and tubing-head adapter flange 9, by hold-down bolt 8, adapter flange 4 and tubing-head adapter flange 9 are fixed together, the top of adapter flange 4 is connected with crossover sub 3, be provided with in crossover sub 3 and hang lifting sub 2, sucker rod 6 by with hang lifting sub 2 and be connected and will hang in platform that lifting sub 2 is placed in crossover sub 3, sucker rod can be hung.Suspension lifting sub 2 wherein in the present invention is cross fluid passage.
Further, hang on lifting sub 2 and be provided with crossbeam, the landing inner diameter in crossover sub 3 is less than crossbeam external diameter, hangs salable well head on lifting sub 2 is placed on crossover sub 3 platform by crossbeam.
Further, the top of crossover sub 3 has been threaded plug 1, and be connected with the box on crossover sub top by plug and tighten, the salable crossover sub of plug 1 is to realize wellhead sealing.
Further, adapter flange 4 comprises the different upper part of diameter and lower part, the button-type of lower part and the button-type of tubing-head adapter flange 9 match, the button-type diameter of upper part is less than the button-type diameter of lower part, screw thread bottom the button-type of upper part and high pressure crossover sub 3 matches, crossover sub and adapter flange are fixed together and can realize being connected and sealing fast, wherein, the adapter flange upper part button-type in the present invention is 3
1/2tubing thread (EUE).
Be described below in conjunction with the course of work of accompanying drawing to a kind of well top sealing device of the present invention:
First originally all two public hold-down bolts and tubing-head adapter flange is removed, adapter flange and Bx156 steel ring are arranged on tubing-head adapter flange, carry out press seal by hold-down bolt, the screw thread bottom crossover sub 3 is twined material strip and be connected with the box screw thread on adapter flange 4 top and tighten.
Then, upwards promoting sucker rod 6 and the suspension in crossover sub 3 and promotes and to be connected bottom short circuit 2 and to tighten, to transferring suspension lifting short circuit 2, hanging on the platform step place of crossover sub 3 inside.
Finally, the box of plug 1 with crossover sub 3 top is threaded and tightens, the sealing to well head can be realized.
The present invention is by using TH10121, TK669 etc. are aboveground, reach re-set target, meet well control safety specification, this apparatus design operating pressure is 70Mpa, the requirement of existing wellbore treatments can be met, can evade the leakage of medium in sleeve pipe, evade well control risk, be a kind of effective well control device.
A kind of well top sealing device of the present invention, utilizes the steel ring on former production tree and adapter flange of the present invention, by hold-down bolt to make the upper and lower Flange joint of tubing head, realizes wellhead sealing, prevents oil and gas leakage; The button-type of adapter flange upper part is consistent with high pressure crossover sub screw thread, can realize quick connection, sealing; Can meet the requirement of existing wellbore treatments, stop the leakage of oil gas medium in sleeve pipe, be the effective well control device of one.
Further describe invention has been by specific embodiment above; but it should be understood that; here concrete description; should not be construed as the restriction to the spirit and scope of the invention; one of ordinary skilled in the art to the various amendments that above-described embodiment is made, belongs to the scope that the present invention protects after reading this specification.
Claims (5)
1. a well top sealing device, is arranged on well head place for sealing wellhead, it is characterized in that, comprise
Adapter flange (4), is fixedly connected on tubing-head adapter flange (9) top;
Crossover sub (3), is fixedly connected on the top of adapter flange (4);
Hang lifting sub (2), be arranged in crossover sub (3), the bottom hanging lifting sub (2) is connected with sucker rod (6), can hang sucker rod by hanging in platform that lifting sub (2) is placed in crossover sub (3);
Plug (1), is fixedly connected on the top of crossover sub (3), and salable crossover sub (3) is to realize wellhead sealing.
2. well top sealing device according to claim 1, is characterized in that, is provided with the steel ring (7) for sealing between adapter flange (4) and tubing-head adapter flange (9).
3. well top sealing device according to claim 1 and 2, is characterized in that, adapter flange (4) and tubing-head adapter flange (9) are fixed together by hold-down bolt (8).
4. well top sealing device according to claim 1, it is characterized in that, hang on lifting sub (2) and be provided with crossbeam, landing inner diameter in crossover sub (3) is less than crossbeam external diameter, hangs lifting sub (2) and is placed on the platform of crossover sub (3) by crossbeam.
5. well top sealing device according to claim 1, it is characterized in that, adapter flange (4) comprises the different upper part of diameter and lower part, the button-type of the button-type of lower part and tubing-head adapter flange (9) matches, and the screw thread of the button-type of upper part and high pressure crossover sub (3) bottom matches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521040881.6U CN205189811U (en) | 2015-12-15 | 2015-12-15 | Sealed wellhead assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521040881.6U CN205189811U (en) | 2015-12-15 | 2015-12-15 | Sealed wellhead assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205189811U true CN205189811U (en) | 2016-04-27 |
Family
ID=55782811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521040881.6U Withdrawn - After Issue CN205189811U (en) | 2015-12-15 | 2015-12-15 | Sealed wellhead assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205189811U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370235A (en) * | 2015-12-15 | 2016-03-02 | 中国石油化工股份有限公司 | Wellhead sealing device |
| CN108952616A (en) * | 2018-07-24 | 2018-12-07 | 毛谦明 | One kind making envelope tool and does envelope operational method |
| CN113550709A (en) * | 2021-09-07 | 2021-10-26 | 北京中海沃邦能源投资有限公司石楼分公司 | Pressure-bearing leakage blocking device adopting drilling fluid leakage blocking agent |
-
2015
- 2015-12-15 CN CN201521040881.6U patent/CN205189811U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370235A (en) * | 2015-12-15 | 2016-03-02 | 中国石油化工股份有限公司 | Wellhead sealing device |
| CN105370235B (en) * | 2015-12-15 | 2017-11-03 | 中国石油化工股份有限公司 | A kind of well top sealing device |
| CN108952616A (en) * | 2018-07-24 | 2018-12-07 | 毛谦明 | One kind making envelope tool and does envelope operational method |
| CN108952616B (en) * | 2018-07-24 | 2021-09-17 | 毛谦明 | Sealing tool and sealing operation method |
| CN113550709A (en) * | 2021-09-07 | 2021-10-26 | 北京中海沃邦能源投资有限公司石楼分公司 | Pressure-bearing leakage blocking device adopting drilling fluid leakage blocking agent |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160427 Effective date of abandoning: 20171103 |
|
| AV01 | Patent right actively abandoned |