CN201581816U - Gap coupling for lateral drilling - Google Patents
Gap coupling for lateral drilling Download PDFInfo
- Publication number
- CN201581816U CN201581816U CN2009202519718U CN200920251971U CN201581816U CN 201581816 U CN201581816 U CN 201581816U CN 2009202519718 U CN2009202519718 U CN 2009202519718U CN 200920251971 U CN200920251971 U CN 200920251971U CN 201581816 U CN201581816 U CN 201581816U
- Authority
- CN
- China
- Prior art keywords
- box cupling
- chamfer angle
- sidetracked hole
- gap
- thread
- 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
The utility model provides a gap coupling for lateral drilling, which is composed of a coupling body and chamfer angle structures on two ends of the coupling body. In the technical scheme, the coupling body is a cylindrical sleeve pipe, the inner side is provided with screw threads, and the chamfer angle degree of the chamfer angle structures is 30-60 degrees. With the design of the special chamfer angle structure, the gap coupling for lateral drilling satisfies the demand for successful descent of the sleeve pipe in an oil well with lateral windowing, and the connection strength can meet the field requirement, thereby having important productive and practical significance on the potential exploration of the remaining oil and the recovery ratio improvement of the old oil field.
Description
Technical field
The utility model relates to a kind of box cupling, particularly relates to a kind of sidetracked hole gap box cupling.
Background technology
Sidetracked hole is an important wing that is used to excavate the remaining oil potentiality and improves the old filed recovery ratio.Sidetracked hole is exactly on the basis of original well, needs according to geological design, certain depth at old well is implemented " windowing ", bore a kind of boring method of meeting target zone or remaining oil enrichment district along planned course, it can realize better that abandoned well utilizes again, has characteristics such as less investment, construction are simple, instant effect.Yet according to the requirement that use in the oil field, need provide specific direct linkage type sleeve pipe and supporting casing hardware, wherein casing hardware is mainly used in and connects downhole tool and hanger.Sidetracked hole is to implement to window at the certain depth of old well, and employed casing hardware must satisfy the condition that is lowered to old well smoothly, but does not also have corresponding casing hardware at present.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of sidetracked hole gap box cupling.
For solving the problems of the technologies described above, the technical solution of the utility model is:
A kind of sidetracked hole gap box cupling is made up of the chamfering structure at box cupling body and box cupling body two ends, and wherein the box cupling body is a cylinder-shaped sleeve, and the inboard is provided with screw thread, and the chamfer angle of chamfering structure is 30-60 °.
Preferably, above-mentioned sidetracked hole gap box cupling, the chamfer angle of described chamfering structure are 45 °.
Preferably, above-mentioned sidetracked hole gap box cupling, the inside thread of described box cupling body are oval screw thread, short round thread or buttress thread.
Preferably, above-mentioned sidetracked hole gap box cupling, the inside thread of described box cupling body are buttress thread.
The beneficial effects of the utility model are:
Above-mentioned sidetracked hole passes through the design of its special chamfering structure with the gap box cupling, the needs that oil well that sleeve pipe windows for side is gone into the well have smoothly been satisfied, and its bonding strength also can satisfy on-the-spot needs, has important production practices meaning for excavating the remaining oil potentiality and improving the old filed recovery ratio.
Description of drawings
Fig. 1 is the structural representation of a kind of sidetracked hole that provides of the utility model with the gap box cupling.
Among the figure: 1-box cupling body 2-chamfering structure
The specific embodiment
Below in conjunction with accompanying drawing the utility model structure is described in detail:
As shown in Figure 1, a kind of sidetracked hole gap box cupling is made up of the chamfering structure 2 at box cupling body 1 and box cupling body two ends, and wherein box cupling body 1 is a cylinder-shaped sleeve, and the inboard is provided with buttress thread, and the chamfer angle of chamfering structure 2 is 45 °.
The above-mentioned sidetracked hole course of work of gap box cupling:
Screw thread by box cupling body 1 inboard is fastened described sidetracked hole with gap box cupling one end and sleeve pipe (having the external screw thread that matches with box cupling body 1), sidetracked hole is fixedlyed connected with hanger with the gap box cupling other end, when sleeve pipe down when the down-hole desire is windowed by side, described sidetracked hole has guaranteed carrying out smoothly of sleeve pipe lateral movement with the special chamfering structure 2 of gap box cupling, and going into the well smoothly for it provides powerful guarantee.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. sidetracked hole gap box cupling, it is characterized in that: the chamfering structure by box cupling body and box cupling body two ends is formed, and wherein the box cupling body is a cylinder-shaped sleeve, and the inboard is provided with screw thread, and the chamfer angle of chamfering structure is 30-60 °.
2. a kind of sidetracked hole gap box cupling according to claim 1 is characterized in that: the chamfer angle of described chamfering structure is 45 °.
3. a kind of sidetracked hole gap box cupling according to claim 1 is characterized in that: the inside thread of described box cupling body is oval screw thread, short round thread or buttress thread.
4. a kind of sidetracked hole gap box cupling according to claim 3 is characterized in that: the inside thread of described box cupling body is a buttress thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202519718U CN201581816U (en) | 2009-12-25 | 2009-12-25 | Gap coupling for lateral drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202519718U CN201581816U (en) | 2009-12-25 | 2009-12-25 | Gap coupling for lateral drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201581816U true CN201581816U (en) | 2010-09-15 |
Family
ID=42723814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202519718U Expired - Fee Related CN201581816U (en) | 2009-12-25 | 2009-12-25 | Gap coupling for lateral drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201581816U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113374423A (en) * | 2020-02-25 | 2021-09-10 | 中国石油天然气股份有限公司 | Coupling and casing with coupling |
-
2009
- 2009-12-25 CN CN2009202519718U patent/CN201581816U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113374423A (en) * | 2020-02-25 | 2021-09-10 | 中国石油天然气股份有限公司 | Coupling and casing with coupling |
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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: 20100915 Termination date: 20101225 |