CN202467686U - Special wellhead reflux unit used for oil field well completing test - Google Patents
Special wellhead reflux unit used for oil field well completing test Download PDFInfo
- Publication number
- CN202467686U CN202467686U CN2011205618411U CN201120561841U CN202467686U CN 202467686 U CN202467686 U CN 202467686U CN 2011205618411 U CN2011205618411 U CN 2011205618411U CN 201120561841 U CN201120561841 U CN 201120561841U CN 202467686 U CN202467686 U CN 202467686U
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- reflux
- barrel
- reflux unit
- urceolus
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Abstract
The utility model relates to a special wellhead reflux unit used for an oil field well completing test. The special wellhead reflux unit is characterized by comprising a reflux barrel and a special joint, wherein the reflux barrel comprises an inner barrel and an outer barrel, the inner barrel is fixedly connected with the outer barrel through a circular ring at the bottom, the inner side of the top of the inner barrel is fixedly connected with the special joint, and a return outlet is arranged at the bottom of the outer barrel. The special wellhead reflux unit provided by the utility model has the advantages that the special wellhead reflux unit can safely and rapidly reflux crude oil or other kinds of liquids in a pipe pillar, the operating efficiency of a lower inner tube pillar is improved, and the operational scheme is simplified.
Description
Technical field
The utility model belongs to oil gas well completion or formation testing technical field, particularly relates to a kind of oilfield well completion and tests special-purpose well head backflow device.
Background technology
In present completion and test jobs, usually down in tubing string carry out stimulation work, use conventional well head threeway reflux crude oil or other fluid in the tubing string; Back-flow velocity is slow; Have the crude oil potential safety hazard in sea that falls, and pithead position is higher when connecting, down in the tubing string complicated operation.For crude oil or other fluid in the tubing string of realizing refluxing safely and fast, and the operating efficiency of tubing string in improving down, the flow process that simplifies the operation, conventional well head threeway can't be satisfied above-mentioned requirements.
The utility model content
The utility model provides a kind of oilfield well completion to test special-purpose well head backflow device for solving the technical problem that exists in the known technology; This device can realize refluxing safely and fast crude oil or other fluid in the tubing string; And the operating efficiency of tubing string in improving down, flow process simplifies the operation.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is:
Oilfield well completion is tested special-purpose well head backflow device; It is characterized in that: comprise reflux tube and special joint; The tube that refluxes comprises inner core and urceolus, and inner core and urceolus are affixed through the annulus of bottom, and the top of inner core is lower than the top of urceolus; The inside top of inner core is fixedly connected with special joint, and the bottom of urceolus is equipped with returns outlet.
Special joint comprises screw thread and the welding ends that is connected with inner core, and special joint and outside tubing string return outlet and then are connected directly to ground tanks or surface production flow process through last buckle.
The utility model can also adopt following technical scheme:
The said urceolus outside also is equipped with hanger.
Advantage and the good effect that the utlity model has are:
After the utility model has adopted above technical scheme; This reflux is installed only need can be realized through last button through special joint and outer tubing string; After reflux is installed; The tube urceolus is higher than inner core owing to reflux, and uncovered big, can realize that the interior crude oil of tubing string or other fluid successfully are back in the tube that refluxes through welding ends safety.The tube that refluxes has the function of buffer memory backflow crude oil or other fluid, can improve the speed of down interior tubing string.Reflux is directly through screwed connection, and the kelly-up height of outer tubing string can need be regulated based on operation, and therefore very convenient to tubing string building platform in down, operating process is simple, and operating efficiency is high.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the upward view of Fig. 1.
Among the figure: 1, special joint; 2, backflow tube; 3, hanger; 4, return outlet.
The specific embodiment
For further understanding utility model content, characteristics and the effect of the utility model, the following examples of giving an example now, and conjunction with figs. specifies as follows:
See also Fig. 1 to Fig. 3,
A kind of oilfield well completion is tested special-purpose well head backflow device; Comprise reflux tube 2 and special joint 1, the tube that refluxes comprises inner core and urceolus, and inner core and urceolus are affixed through the annulus of bottom; The top of inner core is lower than the top of urceolus; The inside top of inner core is fixedly connected with special joint, and the upper end of socket is concordant with the upper end of inner core, and the bottom of urceolus is equipped with returns outlet 4.
Special joint comprises screw thread and the welding ends that is connected with inner core, and special joint and outside tubing string return outlet and then are connected directly to ground tanks or surface production flow process through last buckle.
The said urceolus outside also is equipped with hanger 3.
The operating principle of the utility model is:
Before the tubing string, this device is winched on the outer tubing string down through hanger 3, through special joint 1, with outer tubing string through last buckle, reach suitable torque value after directly rotating this device buckle; Return outlet 4 and be connected to ground tanks or surface production pipeline through 1502 union joints or 602 union joints.
Behind the workbench of tubing string, can be lowered to interior tubing string in building down; Crude oil during the down interior tubing string in the outer tubing string or other fluid are back to a buffer memory that refluxes through the welding ends between special joint and the backflow tube; Crude oil in the backflow tube or other fluids are back to ground tanks or production procedure through returning outlet 4, also can be through delivery pump from returning outlet with crude oil or other FLUID TRANSPORTATION to ground tanks or production procedure.
Special joint can be made dissimilar button-types according to outer tubing string button-type, and returning outlet then is to select 1502 unions or 602 union joints according to ground pipeline button-type commonly used, also can change according to the required button-type of reality.
Although combine accompanying drawing that the preferred embodiment of the utility model is described above; But the utility model is not limited to the above-mentioned specific embodiment, and the above-mentioned specific embodiment only is schematically, is not restrictive; Those of ordinary skill in the art is under the enlightenment of the utility model; Not breaking away under the scope situation that the utility model aim and claim protect, can also make a lot of forms, these all belong within the protection domain of the utility model.
Claims (2)
1. an oilfield well completion is tested special-purpose well head backflow device; It is characterized in that: comprise reflux tube and special joint; The tube that refluxes comprises inner core and urceolus, and inner core and urceolus are affixed through the annulus of bottom, and the top of inner core is lower than the top of urceolus; The inside top of inner core is fixedly connected with special joint, and the bottom of urceolus is equipped with returns outlet.
2. a kind of oilfield well completion according to claim 1 is tested special-purpose well head backflow device, it is characterized in that: the said urceolus outside also is equipped with hanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205618411U CN202467686U (en) | 2011-12-29 | 2011-12-29 | Special wellhead reflux unit used for oil field well completing test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205618411U CN202467686U (en) | 2011-12-29 | 2011-12-29 | Special wellhead reflux unit used for oil field well completing test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202467686U true CN202467686U (en) | 2012-10-03 |
Family
ID=46915852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205618411U Expired - Fee Related CN202467686U (en) | 2011-12-29 | 2011-12-29 | Special wellhead reflux unit used for oil field well completing test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202467686U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505922A (en) * | 2011-12-29 | 2012-06-20 | 中国海洋石油总公司 | Wellhead backflow device special for oil field well completing test |
-
2011
- 2011-12-29 CN CN2011205618411U patent/CN202467686U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505922A (en) * | 2011-12-29 | 2012-06-20 | 中国海洋石油总公司 | Wellhead backflow device special for oil field well completing test |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20171229 |