CN102359350B - Centering device - Google Patents
Centering device Download PDFInfo
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- CN102359350B CN102359350B CN 201110301389 CN201110301389A CN102359350B CN 102359350 B CN102359350 B CN 102359350B CN 201110301389 CN201110301389 CN 201110301389 CN 201110301389 A CN201110301389 A CN 201110301389A CN 102359350 B CN102359350 B CN 102359350B
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- matrix
- bearing
- external surface
- base body
- centralizer
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Abstract
The invention discloses a centering device overcoming the defect of larger clamping rate when the centering device in the prior art needs stopping at a certain depth under a well for a longer time. In the centering, an inner clamping ring (2) is arranged inside a base body (1) through a groove, two sides of the base body (1) are respectively provided with a spherical rotating head (3), a pressurecover (4) arranged on the outer surface of the base body (1) is used for stably arranging a bearing (6) inside the base body (1); the axial line of the bearing (6) is vertical to the axial line of the base body (1), a connecting rod (7) is arranged in an inner ring, the part of the connecting rod (7), extending out of the bearing (6), is provided with a rolling pin (8), and the rotating head (3) is arranged on the rolling pin (8). The embodiment of the invention realizes that the sliding friction of an apparatus and the well wall is converted into the rolling friction of the centering device and the well wall, thus the resistance force is greatly reduced, and the risk of clamping the apparatus is greatly reduced.
Description
Technical field
The present invention relates to a kind of field produces device, relate in particular to a kind of centralizer.
Background technology
For improving logging quality, reduce the probability that card is met in the down-hole, logger often need to be installed centralizer when going into the well.Centralizer commonly used is rubber centralizer, four arms/six arm centralizers etc. at present, these centralizers have certain effect to the normal conventional logger, but need to stop in certain degree of depth the instrument of long period (such as more than 2 hours) for similar formation testing, the effect of these centralizers is just not ideal, and instrument is met card in the down-hole probability can become higher.
On the other hand, for inclined shaft or horizontal well, use instrument resistance when transferring of traditional centralizer very large, often need special device instrument to be shifted onto the position of appointment, this has increased considerably difficulty and the risk of underground work.
Summary of the invention
Technical problem to be solved by this invention is to overcome centralizer of the prior art to meet the larger defective of card probability when the appliance requires long period rests on certain degree of depth of down-hole.
In order to solve the problems of the technologies described above, the invention provides a kind of centralizer, matrix (1) is inner to be provided with interior snap ring (2) by groove, and this matrix (1) both sides respectively are provided with the swivel head (3) of a spherical shape; Be arranged on the gland (4) of matrix (1) external surface with the stable inside that is arranged on matrix (1) of bearing (6); The axis of this bearing (6) is equipped with connecting rod (7) perpendicular to the axis of this matrix (1) in the inner ring; This connecting rod (7) stretches out volume pin (8) is installed on the part of this bearing (6), and this swivel head (3) is installed in this volume and sells on (8).
Preferably, outside of snap ring (2) is circular in this, and inside is hexagon.
Preferably, this matrix (1) is connected by the first screw (9) with interior snap ring (2).
Preferably, this gland (4) is installed on this lug boss (11) by the second screw (10).
Preferably, two these swivel heads (3) that are positioned at this matrix (1) both sides be oppositely arranged and sphere outwardly.
Preferably, the external surface of this matrix (1) includes lug boss (11), and this bearing (6) is positioned at this lug boss (11) inside, and this gland (4) is installed in the external surface of this lug boss (11) by the second screw (10).
Preferably, a part or whole part of this gland (4) is embedded in the external surface of this lug boss (11).
Preferably, be provided with first groove (31) of strip on the external surface of this swivel head (3).
Preferably, be provided with second groove (12) of strip on the external surface of matrix (1).
Preferably, have the gap between snap ring (2) and this matrix (1) in this and can relatively rotate.
Compared with prior art, embodiments of the invention can solve under the abominable hole condition and to meet card and the problem such as to transfer.Embodiments of the invention can radially rotate freely along axially reaching of instrument.When instrument rests in the well or move in inclined shaft, centralizer meeting automatic rotation is to swivel head axis direction level, thereby the meeting automatic rotation is to contacting with the borehole wall, realized the sliding friction of instrument and the borehole wall is converted into the rolling friction of centralizer and the borehole wall, decrease resistance, greatly reduce the risk that instrument is met card.
Other features and advantages of the present invention will be set forth in the following description, and, partly from manual, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in manual, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide the further understanding to technical solution of the present invention, and consists of the part of manual, is used for together with embodiments of the present invention explaining technical scheme of the present invention not consisting of the restriction to technical solution of the present invention.
Fig. 1 is the profile schematic diagram of the embodiment of the invention.
Fig. 2 be in the embodiment of the invention swivel head up and down towards the time top view.
Fig. 3 be in the embodiment of the invention about swivel head towards the time elevation.
Fig. 4 is the R-R sectional view of top view shown in Figure 2.
Fig. 5 is the A-A sectional view of top view shown in Figure 2.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawing embodiments of the invention are elaborated.Need to prove, in the situation that do not conflict, the embodiment among the application and the feature among the embodiment be any combination mutually.
Fig. 1 is the profile schematic diagram of the embodiment of the invention, Fig. 2 be in the embodiment of the invention swivel head up and down towards the time top view, Fig. 3 be in the embodiment of the invention about swivel head towards the time elevation, Fig. 4 is the R-R sectional view of top view shown in Figure 2, Fig. 5 is the A-A sectional view of top view shown in Figure 2.
As shown in Figure 1 and Figure 4, matrix 1 inside comprises outside for circular interior is hexagonal interior snap ring 2, can be fixedly installed instrument 5 in the inside of interior snap ring 2.Wherein be provided with groove on the matrix 1, interior snap ring 2 places this groove, and matrix 1 is connected by the first screw 9 with interior snap ring 2.
As shown in Figure 1, the end face 21 at the two ends of matrix 1 is the plane, and 3, two swivel heads 3 of swivel head that both sides respectively are provided with a spherical shape are oppositely arranged on the both sides of matrix 1, and sphere outwardly.
Embodiments of the invention are stablized the inside that are arranged on matrix 1 by the gland 4 that is arranged on matrix 1 external surface with bearing 6.As shown in Figure 5, matrix 1 external surface central part comprises lug boss 11, and lug boss 11 inside are provided with bearing 6, and gland 4 is installed on the lug boss 11 by the second screw 10 and is arranged in the lug boss 11 so that bearing 6 is stablized.The axis of bearing 6 is perpendicular to the axis of matrix 1, and a part or whole part of gland 4 is embedded in the external surface of lug boss 11 of matrix 1.Connecting rod 7 is installed in the inner ring of bearing 6, and connecting rod 7 stretches out volume pin 8 is installed on the part of bearing 6, and swivel head 3 is installed on the volume pin 8.Have the gap between interior snap ring 2 and the matrix 1 and can relatively rotate.
As shown in Figure 2, be provided with the first groove 31 of strip on the external surface of swivel head 3, can reduce the contact area of swivel head 3 and the borehole wall, thereby can reduce the borehole wall to the resistance of spin axis 3.As shown in Figure 3 and Figure 4, be provided with the second groove 12 of strip on the external surface of matrix 1, can alleviate the weight of centralizer integral body.
Embodiments of the invention are applied in the downhole instrument, can solve under the abominable hole condition to meet card and the problem such as to transfer.Embodiments of the invention can radially rotate freely along axially reaching of instrument, and rotation radially is by the swivel head realization, and axial rotation is to realize by the gap between interior snap ring 2 and the matrix 1.When instrument rests in the well or move in inclined shaft, be subjected to the impact of gravity, centralizer meeting automatic rotation is to swivel head axis direction level, thereby the meeting automatic rotation is to contacting with the borehole wall, realized the sliding friction of instrument and the borehole wall is converted into the rolling friction of centralizer and the borehole wall, decrease resistance (test data show reduce more than 60%), greatly reduce the risk that instrument is met card, simplified the work flow of instrument in inclined shaft (horizontal well).
Although the disclosed embodiment of the present invention as above, the embodiment that described content just adopts for the ease of understanding the present invention is not to limit the present invention.Technician in any the technical field of the invention; under the prerequisite that does not break away from the disclosed spirit and scope of the present invention; can do any modification and variation in the details that reaches of implementing in form; but scope of patent protection of the present invention still must be as the criterion with the scope that appending claims was defined.
Claims (9)
1. a centralizer is characterized in that, matrix (1) is inner to be provided with interior snap ring (2) by groove, and this matrix (1) both sides respectively are provided with the swivel head (3) of a spherical shape; Be arranged on the gland (4) of matrix (1) external surface with the stable inside that is arranged on matrix (1) of bearing (6); The axis of this bearing (6) is equipped with connecting rod (7) perpendicular to the axis of this matrix (1) in the inner ring; This connecting rod (7) stretches out volume pin (8) is installed on the part of this bearing (6), and this swivel head (3) is installed in this volume and sells on (8).
2. centralizer according to claim 1 is characterized in that:
The outside of snap ring (2) is circular in being somebody's turn to do, and inside is hexagon.
3. centralizer according to claim 1 is characterized in that:
This matrix (1) is connected by the first screw (9) with interior snap ring (2).
4. centralizer according to claim 1 is characterized in that:
Two these swivel heads (3) that are positioned at this matrix (1) both sides be oppositely arranged and sphere outwardly.
5. centralizer according to claim 1 is characterized in that:
The external surface of this matrix (1) includes lug boss (11), and this bearing (6) is positioned at this lug boss (11) inside, and this gland (4) is installed in the external surface of this lug boss (11) by the second screw (10).
6. centralizer according to claim 5 is characterized in that:
A part or whole part of this gland (4) is embedded in the external surface of this lug boss (11).
7. centralizer according to claim 1 is characterized in that:
Be provided with first groove (31) of strip on the external surface of this swivel head (3).
8. centralizer according to claim 1 is characterized in that:
Be provided with second groove (12) of strip on the external surface of matrix (1).
9. centralizer according to claim 1 is characterized in that:
Should in have the gap between snap ring (2) and this matrix (1) and can relatively rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110301389 CN102359350B (en) | 2011-10-09 | 2011-10-09 | Centering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110301389 CN102359350B (en) | 2011-10-09 | 2011-10-09 | Centering device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102359350A CN102359350A (en) | 2012-02-22 |
| CN102359350B true CN102359350B (en) | 2013-09-18 |
Family
ID=45584724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110301389 Active CN102359350B (en) | 2011-10-09 | 2011-10-09 | Centering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102359350B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9850722B2 (en) | 2012-11-06 | 2017-12-26 | Evolution Engineering Inc. | Universal downhole probe system |
| CN104234647B (en) * | 2014-07-16 | 2017-02-08 | 大庆福斯特科技开发有限公司 | Underground opening self-locking casing centering device |
| GB2547471B (en) * | 2016-02-19 | 2019-12-11 | Well Deploy Ltd | Wheel securing system and method of use |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4011907A (en) * | 1975-12-19 | 1977-03-15 | Halliburton Company | Knockdown centralizer |
| CN1055979A (en) * | 1991-06-26 | 1991-11-06 | 石油大学 | Diameter-regulating centralizing device |
| CN2700543Y (en) * | 2004-04-08 | 2005-05-18 | 芦成山 | Rotary sucker rod coupling sleeve centralizer |
| CN201246114Y (en) * | 2008-09-11 | 2009-05-27 | 大港油田集团有限责任公司 | Anti-friction and twist well drilling collar |
| CN201705333U (en) * | 2010-06-04 | 2011-01-12 | 中国海洋石油总公司 | Special centralizer for highly-deviated well |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2448723C (en) * | 2003-11-07 | 2008-05-13 | Halliburton Energy Services, Inc. | Variable gauge drilling apparatus and method of assembly thereof |
| GB0417937D0 (en) * | 2004-08-12 | 2004-09-15 | Wireline Engineering Ltd | Downhole device |
| GB0712629D0 (en) * | 2007-06-29 | 2007-08-08 | Mcnay Graeme | Transport assembly |
-
2011
- 2011-10-09 CN CN 201110301389 patent/CN102359350B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4011907A (en) * | 1975-12-19 | 1977-03-15 | Halliburton Company | Knockdown centralizer |
| CN1055979A (en) * | 1991-06-26 | 1991-11-06 | 石油大学 | Diameter-regulating centralizing device |
| CN2700543Y (en) * | 2004-04-08 | 2005-05-18 | 芦成山 | Rotary sucker rod coupling sleeve centralizer |
| CN201246114Y (en) * | 2008-09-11 | 2009-05-27 | 大港油田集团有限责任公司 | Anti-friction and twist well drilling collar |
| CN201705333U (en) * | 2010-06-04 | 2011-01-12 | 中国海洋石油总公司 | Special centralizer for highly-deviated well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102359350A (en) | 2012-02-22 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China Oilfield Services Limited Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Oilfield Services Limited Patentee before: China National Offshore Oil Corporation |
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| CP01 | Change in the name or title of a patent holder |