CN204877307U - Mounting sleeve is with preventing that it connects to spout back -off - Google Patents
Mounting sleeve is with preventing that it connects to spout back -off Download PDFInfo
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- CN204877307U CN204877307U CN201520646575.0U CN201520646575U CN204877307U CN 204877307 U CN204877307 U CN 204877307U CN 201520646575 U CN201520646575 U CN 201520646575U CN 204877307 U CN204877307 U CN 204877307U
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Abstract
The utility model discloses a mounting sleeve is with preventing that it connects to spout back -off, it is installed at the bottom of production casing top and drilling rod to connect production casing and drilling rod, include: it connects the body to prevent spouting the back -off, preventing spouting back -off joint body and having cone and cylinder physique, it has one or a plurality of trompils just to open on the cylinder physique to go up the trompil as the spout hole. By adopting the above scheme in the utility model, one or a plurality of spout holes are processed to it on the basis that former back -off connects, solve effectively in the present sleeve pipe installation that disappearance mud leads to liquid column pressure uneven in the well, cause to spout mud inconvenient, unsafe problem that leads to being under construction in downhole safety, quality hidden danger and the drilling rod.
Description
Technical field
The utility model relates to a kind of mounting sleeve blowout prevention back-off joint.
Background technology
At present, when geothermal well production casing is installed, because of the sealing function of water-stop when geothermal well production casing is installed, mud in former well is sprayed in the descending process of production casing in production casing and drilling rod, cause construction inconvenient, dangerous, make disappearance mud in well cause head of liquid uneven simultaneously, cause downhole safety, hidden danger of quality.
Utility model content
Goal of the invention of the present utility model is the shortcoming overcoming prior art, to provide a kind of safe and reliable mounting sleeve blowout prevention back-off joint.
It is as follows that the utility model solves the problems of the technologies described above taked technical scheme:
A kind of mounting sleeve blowout prevention back-off joint, it is arranged at the bottom of production casing top and drilling rod, to connect production casing and drilling rod, comprise: blowout prevention back-off joint body, described blowout prevention back-off joint body has conical head and cylinder, and on cylinder, having one or more perforate, above perforate is as spout hole.
After the utility model takes such scheme, it processes one or more spout hole on the basis of former back-off joint, in the current sleeve pipe installation process of effective solution, in well, disappearance mud causes head of liquid uneven, and construction is inconvenient, unsafe problem to cause spray mud in downhole safety, hidden danger of quality and drilling rod to cause.
Other features and advantages of the utility model will be set forth in the following description, and, partly become apparent from manual, or understand by implementing the utility model.The purpose of this utility model and other advantages realize by structure specifically noted in write manual, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in detail, to make above-mentioned advantage of the present utility model definitely.
Fig. 1 is the structural representation of the utility model mounting sleeve blowout prevention back-off joint.
Detailed description of the invention
Below in conjunction with specific embodiment, the utility model is described in detail.
Specifically, as shown in Figure 1, a kind of mounting sleeve blowout prevention back-off joint, it is arranged at the bottom of production casing top and drilling rod, to connect production casing and drilling rod, comprising: blowout prevention back-off joint body 1, described blowout prevention back-off joint body has conical head and cylinder, and on cylinder, having one or more perforate 2, above perforate is as spout hole.In one embodiment, above spout hole is not on a horizontal plane.
Wherein, the manufacturing process of this utility model is as follows:
One or more is processed by tunica pipe back-off joint, and as 4 spout holes, UNICOM's drilling rod interior or exterior space, when making mounting sleeve, mud is discharged from spout hole, and can not spray from drilling rod top.
Wherein, using method: to install back-off joint using method identical with geothermal well production casing in the past, is arranged at the bottom of production casing top and drilling rod, for connecting production casing and drilling rod.
In a word, the utility model has following advantage:
1. easy to use, structure is simple;
2. effectively solve the problem of spray mud in drilling rod top when installing production casing, make that sleeve pipe installation work is convenient, safety;
3. keep head of liquid balance in well, get rid of the downhole safety, the hidden danger of quality that exist because head of liquid in well is uneven.
Last it is noted that the foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, although be described in detail the utility model with reference to previous embodiment, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (1)
1. a mounting sleeve blowout prevention back-off joint, it is arranged at the bottom of production casing top and drilling rod, to connect production casing and drilling rod, it is characterized in that, comprise: blowout prevention back-off joint body, described blowout prevention back-off joint body has conical head and cylinder, and on cylinder, have one or more perforate, and above perforate is as spout hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520646575.0U CN204877307U (en) | 2015-08-26 | 2015-08-26 | Mounting sleeve is with preventing that it connects to spout back -off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520646575.0U CN204877307U (en) | 2015-08-26 | 2015-08-26 | Mounting sleeve is with preventing that it connects to spout back -off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204877307U true CN204877307U (en) | 2015-12-16 |
Family
ID=54821690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520646575.0U Active CN204877307U (en) | 2015-08-26 | 2015-08-26 | Mounting sleeve is with preventing that it connects to spout back -off |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204877307U (en) |
-
2015
- 2015-08-26 CN CN201520646575.0U patent/CN204877307U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |