CN101575950A - Riser pipe shoe - Google Patents
Riser pipe shoe Download PDFInfo
- Publication number
- CN101575950A CN101575950A CNA2009100872146A CN200910087214A CN101575950A CN 101575950 A CN101575950 A CN 101575950A CN A2009100872146 A CNA2009100872146 A CN A2009100872146A CN 200910087214 A CN200910087214 A CN 200910087214A CN 101575950 A CN101575950 A CN 101575950A
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- Prior art keywords
- pipe
- riser pipe
- shoe
- riser
- wall
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Abstract
The invention relates to a riser pipe shoe which is characterized by comprising a circular pipe shaped pipe body, wherein the pipe body is divided into an upper pipe, a middle pipe and a lower pipe which are integrally communicated from top to bottom, an external thread is arranged on the upper pipe, an external thread connected with an internal thread of a riser pipe is arranged on the outer wall of the upper pipe, the outer wall of the middle pipe and the outer wall of the riser pipe adopt streamline structures, the lower pipe is provided with a bevelled ellipsoid, and an included angle Alpha is formed between the normal line of the ellipsoid and the axial line of the pipe body. The riser pipe shoe is connected with the riser pipe to form a streamline integral structure, thus being beneficial to diffusing the soil mass around the riser pipe and effectively reducing the soil plug of the pipe shoe; and simultaneously, since the inner diameter and the outer diameter of the upper pipe are the same as that of the riser pipe, the diffusion of the soil mass around the pile is favorable, and the possibility of soil plug of the pipe shoe is further reduced. The invention can be widely applied to various oil exploration and development fields.
Description
Technical field
The present invention relates to a kind of offshore drilling equipment, particularly about be connected the riser pipe shoe of use in a kind of petroleum exploration and development process at sea with riser pipe.
Background technology
At sea in the petroleum exploration and development process, riser pipe shoe is very important parts, and being lowered to smoothly of riser pipe played important effect.As shown in Figure 1, existing pipe shoe is the joint geometry of concave surface in the junction with riser pipe, in going in the mud process of riser pipe, the joint of concave surface is unfavorable for the diffusion of riser pipe surrounding soil on the one hand, and pipe shoe body caliber is less than the riser pipe caliber, in going into the mud process on the other hand, the pipe shoe end easily forms the soil plug, can cause the resistance that is lowered to that increases riser pipe, therefore, make pipe shoe be unfavorable for being lowered to smoothly of riser pipe.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide a kind of riser pipe shoe that the riser pipe surrounding soil spreads, reduces the soil plug effectively that helps.
For achieving the above object, the present invention takes following technical scheme: a kind of riser pipe shoe, it is characterized in that: it comprises the body of a pipe shape, described body is divided into upper tube, central tube and the lower tube that one is communicated with from top to bottom, described upper tube is provided with external screw thread, the outer wall of described upper tube is provided with the external screw thread that is connected with the internal thread of riser pipe, the outer wall of described central tube and the outer wall of riser pipe are streamlined structure, described lower tube has the ellipsoid that is the shape of cutting sth. askew, and the normal of described ellipsoid and the axis of described body have an angle α.
The inner and outer diameter of described upper tube is identical with the inner and outer diameter of riser pipe.
The span of described angle α is between 30 °～60 °, and optimum value is 45 °.
The present invention is owing to take above technical scheme, it has the following advantages: 1, the present invention is owing to adopted the body of pipe shape, this body is divided into upper tube, central tube and the lower tube that one is communicated with from top to bottom, the outer wall of upper tube is provided with the external screw thread that is connected with the internal thread of riser pipe, when pipe shoe with form streamline integral structure after riser pipe is connected, therefore help the diffusion of riser pipe surrounding soil, reduce pipe shoe soil plug effectively.2, therefore the present invention helps the diffusion of pile peripheral earth owing to adopt the inner and outer diameter of upper tube identical with the inner and outer diameter of riser pipe, has further reduced the possibility of pipe shoe soil plug.3, the present invention is owing to be designed to ellipsoid with lower tube, and the normal of this ellipsoid and the axis angle of body are 45, therefore makes the present invention have good guidance quality.But in the present invention's extensive use and the various oil exploration and development fields.
Description of drawings
Fig. 1 is existing riser pipe shoe structural representation
Fig. 2 is an overall structure schematic diagram of the present invention
The specific embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As shown in Figure 2, the present invention includes the body 1 of a pipe shape, body 1 is divided into upper tube 2, central tube 3 and the lower tube 4 that one is communicated with from top to bottom.The inner and outer diameter of upper tube 2 is identical with the inner and outer diameter of riser pipe, the outer wall of upper tube 2 is provided with the external screw thread that is connected with the internal thread of riser pipe, the outer wall of central tube 3 and the outer wall of riser pipe are streamlined structure, lower tube 4 is provided with the ellipsoid that is the shape of cutting sth. askew, and the axis of the normal of this ellipsoid and body 1 has an angle α.
In the foregoing description, the span of angle α is 30 °～60 °, the experiment proved that, when angle α is 45 °, can make pipe shoe of the present invention have best steering capability.
The present invention in use, go in the mud process at riser pipe, since body 1 be streamlined after riser pipe is connected, form coupling with riser pipe, avoided riser pipe the resistance sudden change in being lowered to the process of earth, to occur, help the diffusion of pile peripheral earth, can not cause the earth clogging of pipe shoe.Simultaneously, because upper tube 2 has identical interior external diameter with riser pipe, therefore further reduced to form the possibility of body 1 soil plug.So just can reduce the resistance that is lowered to of conduit, make the present invention that riser pipe is lowered in the earth smoothly, dwindle the time of offshore construction, and reduced construction cost.
In the various embodiments described above; can also with being connected other variation be arranged in structure, for example, upper tube 2 can change with being threaded of riser pipe; every based on the changes and improvements on the technical solution of the present invention, should not get rid of outside protection scope of the present invention.
Claims (3)
1, a kind of riser pipe shoe, it is characterized in that: it comprises the body of a pipe shape, described body is divided into upper tube, central tube and the lower tube that one is communicated with from top to bottom, described upper tube is provided with external screw thread, the outer wall of described upper tube is provided with the external screw thread that is connected with the internal thread of riser pipe, the outer wall of described central tube and the outer wall of riser pipe are streamlined structure, described lower tube has the ellipsoid that is the shape of cutting sth. askew, and the normal of described ellipsoid and the axis of described body have an angle α.
2, a kind of riser pipe shoe as claimed in claim 1 is characterized in that: the inner and outer diameter of described upper tube is identical with the inner and outer diameter of riser pipe.
3, a kind of riser pipe shoe as claimed in claim 1 or 2 is characterized in that: the span of described angle α is between 30 °～60 °, and optimum value is 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100872146A CN101575950A (en) | 2009-06-19 | 2009-06-19 | Riser pipe shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100872146A CN101575950A (en) | 2009-06-19 | 2009-06-19 | Riser pipe shoe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101575950A true CN101575950A (en) | 2009-11-11 |
Family
ID=41271004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100872146A Pending CN101575950A (en) | 2009-06-19 | 2009-06-19 | Riser pipe shoe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101575950A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400652A (en) * | 2011-11-30 | 2012-04-04 | 杨智恺 | Pipe shoe self-adapting to stratum environment |
| CN102561345A (en) * | 2012-02-10 | 2012-07-11 | 中国石油大学(北京) | Whipstock device for pre-inclining riser |
| CN103061689A (en) * | 2013-01-06 | 2013-04-24 | 中国海洋石油总公司 | Waterproof pipe shoe wedge tooth device |
| CN103075116A (en) * | 2012-12-28 | 2013-05-01 | 中国海洋石油总公司 | Riser pipe shoe |
-
2009
- 2009-06-19 CN CNA2009100872146A patent/CN101575950A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400652A (en) * | 2011-11-30 | 2012-04-04 | 杨智恺 | Pipe shoe self-adapting to stratum environment |
| CN102561345A (en) * | 2012-02-10 | 2012-07-11 | 中国石油大学(北京) | Whipstock device for pre-inclining riser |
| CN103075116A (en) * | 2012-12-28 | 2013-05-01 | 中国海洋石油总公司 | Riser pipe shoe |
| CN103075116B (en) * | 2012-12-28 | 2015-06-24 | 中国海洋石油总公司 | Riser pipe shoe |
| CN103061689A (en) * | 2013-01-06 | 2013-04-24 | 中国海洋石油总公司 | Waterproof pipe shoe wedge tooth device |
| CN103061689B (en) * | 2013-01-06 | 2014-11-05 | 中国海洋石油总公司 | Waterproof pipe shoe wedge tooth device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20091111 |