CN202081861U - Special well head device for testing oil and gas well stratums - Google Patents
Special well head device for testing oil and gas well stratums Download PDFInfo
- Publication number
- CN202081861U CN202081861U CN 201120190159 CN201120190159U CN202081861U CN 202081861 U CN202081861 U CN 202081861U CN 201120190159 CN201120190159 CN 201120190159 CN 201120190159 U CN201120190159 U CN 201120190159U CN 202081861 U CN202081861 U CN 202081861U
- Authority
- CN
- China
- Prior art keywords
- tubular column
- tee joint
- well head
- threeway
- head device
- 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 - Fee Related
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Abstract
A special well head device for testing oil and gas well stratums comprises an upper tee joint and a lower tee joint. The upper tee joint is connected with upper components by flanges, the lower end of the upper tee joint is directly seated on the lower tee joint and connected with the lower tee joint by a quick fastener, and the lower end of the lower tee joint is connected with an outer tubular column. An inner tubular column is tripped into the outer tubular column and can be conveniently mounted by a quick fastener without rotating the inner tubular column and the outer tubular column. After being tripped into the outer tubular column, an upper channel connecting the inner tubular column with the upper tee joint is closed, and annular space of the inner tubular column and annular space the outer tubular column are connected with the external by a bypass hole. The special well head device solves the problem that a conventional well head device can only provide a single channel in all-service gas lifting testing operation for tubular columns, a well head of the special well head device has double channels and meets operational requirements of steel wire operation, circular well killing and the like in a testing period. The special well head device is simple in structure, convenient in operation and low in manufacturing cost.
Description
Technical field
The utility model belongs to oil gas well formation testing technical field, the special-purpose wellhead assembly of particularly a kind of oil gas well formation testing.
Background technology
In present brill completion practice, conventional gaslift and coiled tubing gas lift equipment are many, and construction sequence is comparatively complicated, and operating cost is big, and the restriction of managed column dimension, can not be lowered to the steel wire instrument and carry out operations such as pressure measurement, sampling in gaslift, and its limitation is arranged.In order to realize that a casing string has gaslift and formation testing function simultaneously, this tubing string needs well head to keep two relatively independent passages when normal gaslift operation, and conventional well head is single channel, can't satisfy this technological requirement.
Summary of the invention
The purpose of this utility model is that conventional wellhead assembly can only provide single pass problem when solving the operation of multipotency gaslift test string, and the well head that provides has binary channels, satisfies job requirements such as the steel wire operation of test period and circulation kill-job.
The special-purpose wellhead assembly of the oil gas well formation testing that the utility model provides comprises threeway and following threeway, last threeway side connects flutter valve one, following threeway side connects flutter valve two, last threeway upper end is connected with top by flange, the lower end directly is sitting in down in the threeway and connects by linking fast, and following threeway lower end is connected with outer tubing string.
Last threeway lower end is provided with steel wire operation abrasionproof lining and tubing hanger, and the upper end connects wax removal valve and top extension successively by flange, and top parts can be changed at any time.
Main beneficial effect of the present utility model is:
1) after well head installs, have binary channels, satisfy the binary channels requirement of multipotency test string, can realize positive and negative circulation kill-job, steel wire operation is carried out in positive and negative circulation gaslift at any time;
2) last threeway is used to link fast with following threeway and connect, and does not rotate tubing string and can go up the button shackle, and is easy to operate;
3) go up the threeway mounting flange, convenient disassembly is convenient to change top sub.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing specific implementation method of the present utility model is further described.
As shown in the figure, be lowered to outer tubing string earlier, will descend threeway 7 to be connected to outer tubing string top, interior tubing string in being lowered to again, the fluid in the tubing string passes through flutter valve 28 drainages to tubing string inner fluid gathering-device.Interior tubing string is lowered to the sealing of its underpart, back that puts in place and inserts in the seal operation tube, realizes the sealing of inside and outside tubing string, and interior tubing string top is connected with tubing hanger 9.Well head is joined the interior tubing string in long back and is connected to threeway 4, is connected with following threeway 7 by quick button 6, detains on the tubing string in can realizing not rotating.The connection of well head reaches pressure-bearing 34.5Mpa, sealing and pressure requirement when satisfying test.
During the gaslift operation, flutter valve 28 connects nitrogen and injects pipeline, and flutter valve 1 connects test manifold, by flutter valve 28 nitrogen injections, after nitrogen enters inner and outer pipes band of column sky, enter in the interior tubing string from gas lift valve, carry liquid and go out to enter testing process, can realize the nitrogen gaslift from flutter valve 5 internal returns.
If need the direct circulation kill-job, flutter valve 1 is connected to kill line, and the wing two valves 8 connect test manifold, inject well killing fluid by flutter valve 5, and well killing fluid enters inner and outer pipes band of column sky by interior tubing string, returns out from flutter valve 28, can realize the direct circulation kill-job.
After well head installs, can realize steel wire operation according to the test needs.The lower end of last threeway 4 is provided with steel wire operation abrasionproof lining 1.Close paraffin valve door 3 under the state of driving a well, dismantling prolongs plugs in the pipe 2, install lubricator for slick line and sampling instrument string after, open wax removal valve 3 and can realize steel wire operation under the state of driving a well.
Use flange to be connected between extension 2 and the wax removal valve 3, can change extension 2 length and size as required, satisfy the steel wire operation needs of different situations under this.
Claims (2)
1. the special-purpose wellhead assembly of an oil gas well formation testing, it is characterized in that: comprise threeway (4) and following threeway (7), last threeway (4) side connects flutter valve one (5), following threeway (7) side connects flutter valve two (8), last threeway (4) upper end is connected with top by flange, the lower end directly is sitting in down threeway (7) and goes up by button (6) connection fast, and following threeway (7) lower end is connected with outer tubing string.
2. according to the special-purpose wellhead assembly of the described oil gas well of claim 1 formation testing, it is characterized in that: described threeway (4) lower end of going up is provided with steel wire operation abrasionproof lining (1) and tubing hanger (9), and the upper end connects wax removal valve (3) and top extension (2) successively by flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120190159 CN202081861U (en) | 2011-06-02 | 2011-06-02 | Special well head device for testing oil and gas well stratums |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120190159 CN202081861U (en) | 2011-06-02 | 2011-06-02 | Special well head device for testing oil and gas well stratums |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202081861U true CN202081861U (en) | 2011-12-21 |
Family
ID=45342497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120190159 Expired - Fee Related CN202081861U (en) | 2011-06-02 | 2011-06-02 | Special well head device for testing oil and gas well stratums |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202081861U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322241A (en) * | 2011-06-02 | 2012-01-18 | 中国海洋石油总公司 | Special well head device for formation test of oil and gas wells |
-
2011
- 2011-06-02 CN CN 201120190159 patent/CN202081861U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322241A (en) * | 2011-06-02 | 2012-01-18 | 中国海洋石油总公司 | Special well head device for formation test of oil and gas wells |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20160602 |