CN109899018A - One kind is to reverse circulation washing device on oil well - Google Patents
One kind is to reverse circulation washing device on oil well Download PDFInfo
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- CN109899018A CN109899018A CN201711289175.9A CN201711289175A CN109899018A CN 109899018 A CN109899018 A CN 109899018A CN 201711289175 A CN201711289175 A CN 201711289175A CN 109899018 A CN109899018 A CN 109899018A
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- Prior art keywords
- drifting
- pipe
- reverse circulation
- inner tube
- circulation washing
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Abstract
The invention discloses one kind to reverse circulation washing device on oil well, and underground bulk junk is salvaged in the reverse circulation washing applied to oilfield horizontal well.It is connected with drifting pipe in the lower end of top connection, drifting pipe is cylindrical shape, interior fishing cup is fixed in drifting pipe, interior fishing cup is made of inner tube and conical pipe, and the lower end of inner tube is welded on the smaller diameter end of conical pipe, and the lower end of conical pipe is welded on the inner wall of drifting pipe.Effect is: fishing cup in being arranged on drifting tube wall can salvage underground bulk junk, reliably be lifted out pit shaft；It realizes drifting and fishing integrated operation, is there is block-like junk horizontal segment drifting, it, can backwash well operations when drifting operation is hampered；It reduces and bores other operation auxiliary processes such as mill, the actual effect for well operations of improving the standard.
Description
Technical field
The invention belongs to technical field of petroleum extraction, are related to one kind to reverse circulation washing device on oil well.
Background technique
In horizontal well production process, when drilling through the well cementation junks such as blind plate and underground stove bolt, generated in horizontal segment certain
The biggish blocky junk of the volume of amount.And these blocky junks, directly affect the other process of horizontal well construction operation and normal
Well completion work.Currently, salvaging blocky junk using conventional anti-sand washing process, since tubing string is isodiametric inner wall, and pump
The discharge capacity of vehicle is limited, these biggish blocky (junks) can not be gone out pit shaft.Such horizontal well trouble of lost tool in hole is handled without more
Effective fishing tool.
Summary of the invention
The object of the present invention is to provide one kind to reverse circulation washing device on oil well, and interior fishing is arranged on drifting tube wall
Cup is realized and reliably salvages underground bulk junk；Overcoming at present cannot be by larger blocky fishing junk only with back-flushing method
The deficiency not come out.
The technical solution adopted by the present invention is that: to reverse circulation washing device on oil well, mainly by top connection, drifting pipe and
Interior fishing cup composition.There is oil pipe internal screw thread in the upper end of top connection, can be connect with tubing string, it is characterised in that: in the lower end of top connection
It is connected with drifting pipe, drifting pipe is cylindrical shape, and interior fishing cup is fixed in drifting pipe, and interior fishing cup is made of inner tube and conical pipe,
The lower end of inner tube is welded on the smaller diameter end of conical pipe, and the lower end of conical pipe is welded on the inner wall of drifting pipe.
In order to make junk have better suited storage space, the center line of the inner tube and the center line of drifting pipe are at one
On straight line, and the distance between the outer wall of inner tube and drifting inside pipe wall are between 30~40 millimeters.
The length of the inner tube is between 120~160 millimeters.
Between 30~60 degree of taper of the conical pipe.
Sketch the salvaging principle to reverse circulation washing device on oil well.Refering to fig. 1.Horizontal well reverse circulation washing is salvaged
Tool is connected to the lower end G.I.H of reverse circulation washing tubing string；Turn on pump carries out reverse circulation washing drifting, reacting cycle well-flushing.If any
Junk, first junk are rinsed liquid and pour in drifting pipe 1, due to small (62 millimeters identical as the oil pipe interior diameter) flow velocity of inner tube diameter
Fastly, junk enters drifting pipe 1 by inner tube, and 1 internal diameter of drifting pipe is big, and liquid is flowing into slow-down in drifting pipe 1, thus by block
Shape junk pours in the annular space between inner tube and drifting pipe 1.After completing backwash drifting construction, act tubing string, junk
Taken to ground together.It completes to salvage clast junk.
Beneficial effects of the present invention: the present invention has interior fishing cup, interior fishing in drifting pipe to reverse circulation washing device on oil well
Cup is welded in drifting tube body, and anti-flushing well while, interior fishing cup guaranteed the fishing junks such as bulk.
Drifting pipe and interior fishing cup weld together, and realize drifting and fishing integrated operation, are having block-like junk horizontal
Section drifting can backwash well operations when drifting operation is hampered；Due to the special role of interior fishing cup, blocky junk can be carried into fishing
Cup inner cavity, realizes improving efficiency for horizontal well drifting operation, reduces other operation auxiliary processes.
Drifting and fishing integrated tool can reliably take blocky junk out of pit shaft: block-like junk once enters interior fishing
Cup during trip-out, is not influenced by liquid flowing, realizes and take junk out of pit shaft.
Detailed description of the invention
Fig. 1 the structural representation of present invention.
Specific embodiment
Referring to Fig. 1, the present invention is to reverse circulation washing device on oil well, mainly by top connection 1, drifting pipe 2 and interior fishing cup 3
Composition.There is API standard oil pipe internal screw thread in the upper end of top connection 1, can be connect with tubing string.It is connected in the lower end of top connection 1 outer
The drifting pipe 2 that diameter is 152 millimeters, 2 length of drifting pipe are 230 millimeters.An interior fishing cup 3, interior fishing cup are fixed in drifting pipe 2
3 are made of inner tube and conical pipe.73 millimeters of the outer diameter of inner tube, the length of inner tube be 140 millimeters (containing tapered portion), in inner tube
The center line of heart line and drifting pipe 2 is point-blank.The lower end of inner tube is welded on the smaller diameter end of conical pipe, under conical pipe
End is welded on the inner wall of drifting pipe 2.The taper of conical pipe is 90 degree (gradient is 45 degree).
Claims (4)
1. one kind is mainly made of top connection (1), drifting pipe (2) and interior fishing cup (3) to reverse circulation washing device on oil well,
There is oil pipe internal screw thread in the upper end of top connection (1), it is characterised in that: be connected with drifting pipe (2) in the lower end of top connection (1), lead to
Well casing (2) is cylindrical shape, is fixed with interior fishing cup (3) in drifting pipe (2), interior fishing cup (3) is made of inner tube and conical pipe, inner tube
Lower end be welded on the smaller diameter end of conical pipe, the lower end of conical pipe is welded on the inner wall of drifting pipe (2).
2. it is according to claim 1 to reverse circulation washing device on oil well, it is characterized in that: the center line of the inner tube
Point-blank with the center line of drifting pipe (2), and the distance between the outer wall end of inner tube and drifting pipe (2) inner wall are 30
Between~40 millimeters.
3. it is according to claim 1 or 2 to reverse circulation washing device on oil well, it is characterized in that: the length of the inner tube
Degree is between 120~160 millimeters.
4. it is according to claim 1 or 2 to reverse circulation washing device on oil well, it is characterized in that: the conical pipe
Taper is between 30~60 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711289175.9A CN109899018A (en) | 2017-12-08 | 2017-12-08 | One kind is to reverse circulation washing device on oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711289175.9A CN109899018A (en) | 2017-12-08 | 2017-12-08 | One kind is to reverse circulation washing device on oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109899018A true CN109899018A (en) | 2019-06-18 |
Family
ID=66939674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711289175.9A Pending CN109899018A (en) | 2017-12-08 | 2017-12-08 | One kind is to reverse circulation washing device on oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109899018A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114059951A (en) * | 2020-07-31 | 2022-02-18 | 中国石油化工股份有限公司 | Fishing type falling-proof device and falling-proof device using same |
-
2017
- 2017-12-08 CN CN201711289175.9A patent/CN109899018A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114059951A (en) * | 2020-07-31 | 2022-02-18 | 中国石油化工股份有限公司 | Fishing type falling-proof device and falling-proof device using same |
| CN114059951B (en) * | 2020-07-31 | 2024-04-26 | 中国石油化工股份有限公司 | Fishing type falling-preventing device and falling-preventing device using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190618 |
|
| WD01 | Invention patent application deemed withdrawn after publication |