CN2709639Y - Split casing centralising apparatus - Google Patents
Split casing centralising apparatus Download PDFInfo
- Publication number
- CN2709639Y CN2709639Y CN 200420072799 CN200420072799U CN2709639Y CN 2709639 Y CN2709639 Y CN 2709639Y CN 200420072799 CN200420072799 CN 200420072799 CN 200420072799 U CN200420072799 U CN 200420072799U CN 2709639 Y CN2709639 Y CN 2709639Y
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- CN
- China
- Prior art keywords
- casing
- centralising apparatus
- centralizer
- split casing
- split
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- Expired - Fee Related
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Abstract
Disclosed is a split casing centralising apparatus, solving the problems that in the prior art, a hot-wedge type centralising apparatus used in the casing drilling generates definite undersize action on a casing body, and the position of the hot-wedge type centralising apparatus is not conveniently adjusted at site. The utility model is characterized in that the split casing centralising apparatus body (2) is composed of two half bodies of structure symmetry, a groove (5) is arranged in the inner wall of the split casing centralising apparatus body (2), and the two ends of the split casing centralising apparatus body (2) are provided with stop ring grooves (7). The two ends of a casing coupling (4) are both provided with internal threads, the centre part of the outer wall of the split casing centralising apparatus body (2) is provided with a locating shoulder (1), and the locating shoulder (1) and the groove (5) are in clearance fit. The split casing centralising apparatus which is of easy assembly and disassembly can generate no undersize effect on the casing body and can conveniently adjust the position of the split casing centralising apparatus on the casing.
Description
Technical field:
The utility model relates to the instrument of a kind of used in oil drilling field centralizing function, especially relate to a kind of be applied in the casing drilling sleeve pipe risen set upright and the centralizer of interconnect function.
Background technology:
In sleeve in oil field drilling well field,, need on sleeve pipe, fixedly have the centralizer of spirality guiding gutter usually in order to prevent the sleeve pipe disalignment.Present this centralizer adopts thermal wedge dress formula centralizer more, the thermal wedge that is adopted when for example U.S. Tesco company carries out casing drilling dress formula centralizer.Although it is respond well that this centralizer is set upright, but in actual applications, but find to exist following deficiency: at first, this kind centralizer is by wedge heating back is wedged, after the wedge cooling, can realize the locking between centralizer body and sleeve pipe, in case the therefore fixing first malposition of centralizer, the drill-well operation personnel will be difficult to readjust the position of centralizer; In addition, this thermal wedge dress formula centralizer is to lock in the mode of cold contraction, can produce the undergauge influence to sleeve body to a certain extent, is unfavorable for the normal use of sleeve pipe.
The utility model content:
In order to overcome the problem that the thermal wedge dress formula centralizer that is used for casing drilling in the prior art can produce certain undergauge effect to sleeve body and the position of centralizer is not easy to adjust when using at the scene, the utility model provides a kind of split type casing stabbing board that is used for casing drilling, this kind centralizer can not produce the undergauge influence to sleeve body, and be easy to installation and removal, can adjust the permanent position of centralizer on sleeve pipe easily at the scene.
The technical solution of the utility model is: this kind is used for the centralizer of casing drilling, comprise that external surface has the centralizer body of guiding gutter, casing coupling, baffle ring, wherein centralizer body is made of the halfbody of two symmetrical configuration, and some grooves are arranged on the wall within it, at its two ends the baffle ring groove is arranged; All having the internal thread that can match with the external screw thread of casing joint place at the two ends of casing coupling, have and the corresponding some locating shoulders of centralizer body upper groove number at its outer wall middle part, is matched in clearance between described locating shoulder and the groove.
The utlity model has following beneficial effect: owing to take the centralizer of such scheme to constitute by two halfbodies that have detent and baffle ring groove, after the casing coupling that utilization has a locating shoulder is finished up and down connection between two sleeve pipes, with two halfbodies of centralizer according to locating shoulder being placed the mode of detent fasten, then baffle ring is placed the baffle ring groove to lock, so just can realize circumferentially reaching axial limiting to the connection of sleeve pipe and to centralizer, the fixed form of this casing stabbing board is very simple, is easy to adjust as required at any time at the scene the permanent position of centralizer; Utilize this kind centralizer can not produce the well effect of contracting, therefore the application life of having guaranteed sleeve pipe to sleeve pipe; In addition, this kind centralizer production technology is simple, cost of production is low, uses it and carries out casing drilling, can reduce drilling cost.
Description of drawings:
Accompanying drawing 1 is the utility model and structure sectional view after sleeve pipe is connected;
Accompanying drawing 2 are the utility model with A-A after sleeve pipe is connected to sectional view.
1-locating shoulder among the figure, 2-centralizer body, 3-sleeve pipe, 4-casing coupling, 5-groove, 6-baffle ring, 7-baffle ring groove.
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
As Fig. 1 in conjunction with shown in Figure 2, this kind is exclusively used in the split type casing stabbing board of casing drilling, comprise that external surface has the centralizer body 2 of spirality guiding gutter, casing coupling 4, baffle ring 6, wherein said centralizer body 2 is that the halfbody by two symmetrical configuration constitutes, having some grooves 5 within it on the wall, is example with 4 grooves in this example.At the two ends of centralizer body 2 baffle ring groove 7 is arranged, its effect is after two halfbodies of centralizer body fasten, and baffle ring 6 is pressed in the baffle ring groove 7, can finish the circumferential locking to centralizer body.All have the internal thread that can match at the two ends of casing coupling 4, can realize the connection between sleeve pipe up and down like this with the external screw thread in the casing joint.There are some locating shoulders 1 at outer wall middle part at casing coupling 4, be matched in clearance between these locating shoulders 1 and the groove 5, its number also should be corresponding with the groove number, and the purpose that these grooves and boss are set is to make that centralizer body is fixed in the periphery of sleeve pipe, realizes circumferentially with axial spacing.
In the utility model between each parts concrete annexation as follows: at first utilize between casing coupling 4 and the upper and lower sleeve pipe 3 and form threaded connection, halfbody with two centralizers 2 fastens according to the mode that locating shoulder 1 is embedded groove 5 then, and baffle ring 6 is pressed into back locking.Like this, axial relative motion and circumferential relative motion can not take place between centralizer body and the sleeve pipe, make centralizer body accurately to be fixed on the sleeve pipe, can play good centralizing function when sleeve pipe carries out drilling well.
Claims (1)
1, a kind of split type casing stabbing board, comprise that external surface has the centralizer body of guiding gutter (2), casing coupling (4), baffle ring (6), it is characterized in that: described centralizer body (2) is made of the halfbody of two symmetrical configuration, and fluted on the wall within it (5) have baffle ring groove (7) at its two ends; The two ends of casing coupling (4) all have internal thread, and there is locating shoulder (1) at its outer wall middle part, is matched in clearance between described locating shoulder (1) and the groove (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420072799 CN2709639Y (en) | 2004-07-07 | 2004-07-07 | Split casing centralising apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420072799 CN2709639Y (en) | 2004-07-07 | 2004-07-07 | Split casing centralising apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2709639Y true CN2709639Y (en) | 2005-07-13 |
Family
ID=34852667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420072799 Expired - Fee Related CN2709639Y (en) | 2004-07-07 | 2004-07-07 | Split casing centralising apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2709639Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332661A (en) * | 2015-10-14 | 2016-02-17 | 北京海蓝科技开发有限责任公司 | Flow guide type centralizer and petroleum instrument |
| CN108868659A (en) * | 2018-07-10 | 2018-11-23 | 河南理工大学 | Split type coal mine circle stile |
-
2004
- 2004-07-07 CN CN 200420072799 patent/CN2709639Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332661A (en) * | 2015-10-14 | 2016-02-17 | 北京海蓝科技开发有限责任公司 | Flow guide type centralizer and petroleum instrument |
| CN108868659A (en) * | 2018-07-10 | 2018-11-23 | 河南理工大学 | Split type coal mine circle stile |
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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: 20050713 Termination date: 20130707 |