CN201568022U - Pipe column underground switch for changing deep horizontal gas-well bare-hole after being segmented and cracked - Google Patents
Pipe column underground switch for changing deep horizontal gas-well bare-hole after being segmented and cracked Download PDFInfo
- Publication number
- CN201568022U CN201568022U CN2010200447953U CN201020044795U CN201568022U CN 201568022 U CN201568022 U CN 201568022U CN 2010200447953 U CN2010200447953 U CN 2010200447953U CN 201020044795 U CN201020044795 U CN 201020044795U CN 201568022 U CN201568022 U CN 201568022U
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- China
- Prior art keywords
- horizontal gas
- hole
- pipe column
- deep horizontal
- well
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- Expired - Fee Related
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Abstract
A pipe column underground switch for changing deep horizontal gas-well bare-hole after being segmented and cracked mainly solves the problems that a production pipe column is changed without pressing well after an existing deep horizontal gas-well bare-hole is segmented and cracked, has high well control requirement and high operation cost, and has a certain safe risks. The pipe column underground switch is characterized in that an outer screw thread on the upper end of a lower joint (1) is connected with an upper joint (2), a screw thread is arranged in the upper portion of the upper joint (2), a throttle nozzle (3) is connected with the inner screw thread on the upper end of the lower joint (1), the upper end of the throttle nozzle (3) is provided with an inner inclined surface (4), a spherical surface (5) is arranged on the lower portion of the inclined surface (4), a valve ball (6) is arranged on the spherical surface (5), and the contact portion of the throttle nozzle (3) and the upper joint (2) is provided with a seal ring (7). The pipe column underground switch for changing deep horizontal gas-well bare-hole after being segmented and cracked not only can change production pipe columns under the condition without pressing wells, but also has the characteristics of well control requirement, low operation cost, safety and reliability.
Description
Technical field:
The utility model relates to oil field gas well field underground work or the used down-hole switch of kill-job, especially changes the tubing string down-hole switch after the deep horizontal gas well bore hole staged fracturing.
Background technology:
In gas well field, oil field, after the deep horizontal gas well bore hole staged fracturing, need to change flow string, for subsequent production provides condition.And the main mode of changing flow string after the existing deep horizontal gas well bore hole staged fracturing is, the one, and kill job; The 2nd, not kill-job band is pressed and is removed.And kill job damages reservoir easily, influences production capacity; The snubbing serving well control requires high, and the operation cost height has certain security risk.
The utility model content:
In order to solve non-well killing change flow string after the existing deep horizontal gas well bore hole staged fracturing, well control requires high, the operation cost height, the problem that certain security risk is arranged, the utility model is changed the tubing string down-hole switch after a kind of deep horizontal gas well bore hole staged fracturing is provided, change the tubing string down-hole switch after this deep horizontal gas well bore hole staged fracturing and not only can under not kill-job situation, change flow string, and have the well control requirement and characteristics that operation cost is low, safe and reliable.
The technical solution of the utility model is: change the tubing string down-hole switch after this deep horizontal gas well bore hole staged fracturing and comprise lower contact, the lower contact upper external screw thread is connected with top connection, top connection has screw thread in the top, lower contact upper end internal thread is connected with flow nipple, inclined-plane in the flow nipple upper end, under the inclined-plane sphere is arranged, there is valve ball at the sphere seat of honour, and flow nipple and top connection contact position are provided with sealing ring.
The utlity model has following beneficial effect: change the tubing string down-hole switch after this deep horizontal gas well bore hole staged fracturing because employing is connected with top connection at the lower contact upper external screw thread, lower contact upper end internal thread is connected with flow nipple, inclined-plane in the flow nipple upper end, under the inclined-plane sphere is arranged, there is the valve ball structure at the sphere seat of honour.Utilize valve ball seat sealing characteristics on the Internal Spherical Surface of flow nipple upper end, fracturing string is closed.Realize downhole closing after the pressure break thus, safety is carried out job requirements such as follow-up replacing tubing string, has avoided kill job injury reservoir equivalent risk, particularly this device latus rectum big, and not influencing extensive fracturing reform carries out, and technology is simple, has improved operating efficiency greatly; And tool sizes is short and small, easy operating.Change the tubing string down-hole switch thus after this deep horizontal gas well bore hole staged fracturing and not only can under not kill-job situation, change flow string, and have the well control requirement and characteristics that operation cost is low, safe and reliable.
Description of drawings:
Accompanying drawing 1 is the utility model closed condition structural representation.
1-lower contact among the figure, 2-top connection, 3-flow nipple, 4-inclined-plane, 5-sphere, 6-valve ball, 7-sealing ring.
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
Shown in accompanying drawing, to change the tubing string down-hole switch after this deep horizontal gas well bore hole staged fracturing and comprise lower contact 1, lower contact 1 upper external screw thread is connected with top connection 2, and top connection has screw thread in 2 tops, and screw thread rises and interconnect function.Lower contact 1 upper end internal thread is connected with flow nipple 3, and inclined-plane 4 in flow nipple 3 upper ends, inclined-plane 4 play guiding valve ball 6 and accurately enter effect.There is sphere 5 on the inclined-plane 4 times, 5 on sphere and valve ball 6 sealing functions.There is valve ball 6 at sphere 5 seats of honour, 6 on-off actions of valve ball.Flow nipple 3 is provided with sealing ring 7 with top connection 2 contact positions, 7 sealing functions that strengthen flow nipple 3 and top connection 2 of sealing ring.
During actual the use, the lower contact 1 of changing the tubing string down-hole switch after this deep horizontal gas well bore hole staged fracturing is connected with following parts casing pipe, top connection 2 is connected with sleeve pipe top, can normally use.Before being lowered to the bore hole staged fracturing tool, according to parameters such as reservoir pressure coefficient, well depth, transformation scales, change the suitable position range of tubing string down-hole switch after calculating this deep horizontal gas well bore hole staged fracturing, connect according to the position of calculating changing the tubing string down-hole switch after this deep horizontal gas well bore hole staged fracturing then, under the lower going-into-well.When after pressure break, changing tubing string, adopt from well head and drop into valve ball 6, chase after then, calculate blanking plug time of advent, observe well head pressure and pump truck pressure, judge valve ball 6 in-positions according to discharge capacity into certain density completion fluid.Completion fluid is filled well and is led to well head, observes well head and does not have the gas demonstration, changes the tubing string operation.After having changed tubing string, the induced flow that circulates is resumed production.
Claims (1)
1. change the tubing string down-hole switch after a deep horizontal gas well bore hole staged fracturing, comprise lower contact (1), it is characterized in that: lower contact (1) upper external screw thread is connected with top connection (2), top connection (2) has screw thread in the top, lower contact (1) upper end internal thread is connected with flow nipple (3), and there is sphere (5) on inclined-plane (4) in flow nipple (3) upper end under inclined-plane (4), there is valve ball (6) at sphere (5) seat of honour, and flow nipple (3) is provided with sealing ring (7) with top connection (2) contact position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200447953U CN201568022U (en) | 2010-01-18 | 2010-01-18 | Pipe column underground switch for changing deep horizontal gas-well bare-hole after being segmented and cracked |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200447953U CN201568022U (en) | 2010-01-18 | 2010-01-18 | Pipe column underground switch for changing deep horizontal gas-well bare-hole after being segmented and cracked |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201568022U true CN201568022U (en) | 2010-09-01 |
Family
ID=42660309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200447953U Expired - Fee Related CN201568022U (en) | 2010-01-18 | 2010-01-18 | Pipe column underground switch for changing deep horizontal gas-well bare-hole after being segmented and cracked |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201568022U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329045A (en) * | 2014-09-01 | 2015-02-04 | 吉林市旭峰激光科技有限责任公司 | Ball throwing double-taper-angle sealing ball seat |
-
2010
- 2010-01-18 CN CN2010200447953U patent/CN201568022U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329045A (en) * | 2014-09-01 | 2015-02-04 | 吉林市旭峰激光科技有限责任公司 | Ball throwing double-taper-angle sealing ball seat |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100901 Termination date: 20140118 |