CN111441731A - Multi-wheel centralizer - Google Patents
Multi-wheel centralizer Download PDFInfo
- Publication number
- CN111441731A CN111441731A CN202010304045.3A CN202010304045A CN111441731A CN 111441731 A CN111441731 A CN 111441731A CN 202010304045 A CN202010304045 A CN 202010304045A CN 111441731 A CN111441731 A CN 111441731A
- Authority
- CN
- China
- Prior art keywords
- roller
- central shaft
- centralizer
- wheel
- shaft rod
- 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.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1057—Centralising devices with rollers or with a relatively rotating sleeve
Abstract
The invention discloses a multi-wheel centralizer, which comprises a central shaft rod and a plurality of roller carriers, wherein the plurality of roller carriers are distributed around the central shaft rod in an annular array, the plurality of roller carriers are mutually independent, a plurality of rollers are arranged on the roller carriers, a spring is arranged between each roller carrier and the central shaft rod, the upper end and the lower end of each roller carrier are independently hinged with the central shaft rod through rivets, the multi-wheel centralizer is more attached to the inner wall of an oil pipeline compared with an integral single-wheel centralizer, through arranging the plurality of mutually independent roller carriers, when one roller carrier approaches to the direction of the central shaft rod through a corrosion part of the pipeline, other roller carriers are not influenced, so that the central shaft rod does not deviate from the axis of the oil pipeline, when the centralizer passes through a coupling, because the plurality of rollers are arranged, the centralizing diameter of the centralizer is not influenced when one roller does not contact with the pipeline wall, avoiding severe vibration of the centralizer.
Description
Technical Field
The invention relates to the technical field of oilfield exploitation, in particular to a multi-wheel centralizer.
Background
The existing centralizer of the instrument in the oil field operation tool is mostly a reed centralizer and an integral single-wheel centralizer. The disadvantages of the reed centralizer: 1. the well descending friction force is large; 2. the vibration caused by sliding friction between the reed and the well wall is large; 3. the compression of one reed reduces the overall righting diameter of the centralizer, so that the centralizer has no righting effect. The disadvantages of the integrated single-wheel centralizer: 1. a change in the centralizer diameter of one roller can cause a change in the centralizer diameter of the whole centralizer; 2. when the coupling is passed, the vibration caused by the coupling is large because the coupling is a single wheel.
Disclosure of Invention
The invention aims to provide a multi-wheel centralizer, which solves the problems that the integral single-wheel centralizer is easy to cause the change of the centralizing diameter of the whole centralizer and has large vibration when passing a coupling.
The invention is realized by the following technical scheme:
a multi-wheel centralizer comprises a central shaft rod and a plurality of roller carriers, wherein the plurality of roller carriers are distributed around the central shaft rod in an annular array mode, the plurality of roller carriers are mutually independent, a plurality of rollers are arranged on the roller carriers, and springs are arranged between the roller carriers and the central shaft rod.
Centralizing diameter (or diameter of centralizing cross section): i.e. the diameter of the circular cross-section formed by the central axis and the roller frame in the radial direction of the central axis.
Coupling: a hooping device at the joint of two oil pipes.
The upper end and the lower end of each roller carrier are independently hinged with the central shaft rod through rivets, when the multi-wheel centralizer extends into an oil production pipeline with a non-standard circle, if the pipeline is corroded to thicken the local position of the pipeline, compared with the integral single-wheel centralizer, the multi-wheel centralizer is more attached to the inner wall of the oil pipeline, namely, two ends of a plurality of roller carriers in the integral single-wheel centralizer are respectively taken as a whole, when a group of supporting frames are reduced in distance from the radial direction of the central shaft due to the reasons of iron rust and the like, one end of each roller carrier slides along the axial direction of the central shaft rod, so that the diameter of the whole righting circle is reduced, the pipeline deviates from the central position, in the invention, a plurality of independent roller frames are arranged, when one roller frame approaches to the direction of the central shaft rod through the rusted part of the pipeline, other roller frames are not influenced, and the central shaft rod does not deviate from the axis of the oil pipe.
When the centralizer passes through a coupling, according to the principle of determining a straight line at two points, because the centralizer is provided with a plurality of rollers, when one roller does not contact the pipe wall, the centralizing diameter of the centralizer is not influenced, namely, the centralizer does not sink the rollers into a joint between oil pipes like an integral single-wheel centralizer, so that the centralizer is severely vibrated.
Furthermore, a first sleeve and a second sleeve are arranged on the outer side face of the central shaft rod, and two ends of the roller carrier are hinged with the first sleeve and the second sleeve on the outer side face of the central shaft rod respectively.
Further, the roller frame includes fixed bracing, wheel pole, moves bracing and gyro wheel, wheel pole both ends are articulated with fixed bracing and move the bracing respectively, the other end and the center pin rod of fixed bracing and moving the bracing are articulated, evenly are provided with a plurality of gyro wheels on the wheel pole.
A plurality of rollers are arranged on one roller rod, so that when the centralizer passes through a coupling, a single roller can be prevented from being sunk into a connecting seam between oil pipes, and vibration is avoided.
Furthermore, a plurality of spring grooves c and d are formed in the central shaft rod, and spring grooves b and spring grooves a are respectively formed in the movable inclined support and the fixed inclined support close to the connecting ends connected with the wheel rods.
Furthermore, the spring grooves a correspond to the spring grooves c one by one, and the spring grooves b correspond to the spring grooves d one by one and are used for fixing two ends of the spring.
Furthermore, the end part of the movable inclined strut connected with the wheel rod is provided with a sliding rail.
Further, the number of the roller frames is at least 6.
Further, a plurality of gyro wheels that evenly set up on the wheel pole are 3 at least.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the sliding friction is changed into rolling friction by the roller, and the downhole resistance is small.
2. The vibration caused by the small resistance of the roller is small.
3. Because of the multiunit supports are independent supports, the change of a set of support diameter is little to the diameter influence of whole centralizer centering for the centralizer can laminate the oil pipe inner wall more.
4. When the centralizer passes through a coupling, two rollers always contact the pipe wall, and the centralizing diameter of the centralizer is not influenced when one roller does not contact the pipe wall according to the principle that a straight line is determined by two points.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a sectional view of the structure of the present invention.
Fig. 2 is a cross-sectional view of a central shaft of the present invention.
Figure 3 is a cross-sectional view of the roller frame of the present invention.
FIG. 4 is a cross-sectional view of the dynamic diagonal brace of the present invention.
FIG. 5 is a top view of the structure of the present invention.
Reference numbers and corresponding part names in the drawings:
1-central shaft rod, 2-roller frame, 3-spring, 11-first sleeve, 12-spring groove c, 13-spring groove d, 14-second sleeve, 21-fixed inclined strut, 22-roller, 23-roller rod, 24-movable inclined strut, 211-spring groove a, 241-spring groove b and 242-sliding rail.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
A multi-wheel centralizer comprises a central shaft rod 1 and a plurality of roller carriers 2, wherein the roller carriers 2 are distributed around the central shaft rod 1 in an annular array mode, the roller carriers 2 are mutually independent, a plurality of rollers 22 are arranged on the roller carriers 2, and springs 3 are arranged between the roller carriers 2 and the central shaft rod 1.
Righting diameter or (diameter of righting cross section): i.e. the diameter of the circular cross-section formed by the central axis and the roller frame in the radial direction of the central axis.
Coupling: a hooping device at the joint of two oil pipes.
The upper end and the lower end of each roller carrier 2 are independently hinged with the central shaft rod 1 through rivets, when the multi-wheel centralizer extends into a non-standard round oil production pipeline (such as a pipeline is corroded to thicken the local position of the pipeline), the multi-wheel centralizer is more attached to the inner wall of the oil production pipeline compared with an integral single-wheel centralizer, that is, two ends of the plurality of roller frames are respectively taken as a whole, when a group of supporting frames are reduced in distance from the radial direction of the central shaft due to the reasons of iron rust and the like, one ends of the plurality of roller frames slide along the axial direction of the central shaft, so that the diameter of the whole righting circle is reduced, and the pipeline deviates from the central position, and the invention arranges a plurality of mutually independent roller carriers 2, when one roller frame 2 approaches to the direction of the central shaft rod through the rusted part of the pipeline, other roller frames 2 are not influenced, so that the central shaft rod 1 does not deviate from the axis of the oil pipe.
When the centralizer passes through a coupling, according to the principle of determining a straight line at two points, because the centralizer is provided with the plurality of rollers 22, when one roller 22 does not contact the pipe wall, the centralizing diameter of the centralizer is not influenced, namely, the centralizer does not sink the rollers into a joint between oil pipes like an integral single-wheel centralizer, so that the centralizer is not vibrated violently.
Example 2
Based on the embodiment 1, the outer side surface of the central shaft rod 1 is provided with the first sleeve 11 and the second sleeve 14, and two ends of the roller frame 2 are respectively hinged with the first sleeve 11 and the second sleeve 14 on the outer side surface of the central shaft rod 1.
The roller frame 2 comprises a fixed inclined strut 21, a wheel rod 23, a movable inclined strut 24 and rollers 22, two ends of the wheel rod 23 are hinged to the fixed inclined strut 21 and the movable inclined strut 24 respectively, the other ends of the fixed inclined strut 21 and the movable inclined strut 24 are hinged to the central shaft rod 1, and the rollers 22 are evenly arranged on the wheel rod 23.
A plurality of rollers are arranged on one roller rod 23, so that when the centralizer passes through a coupling, a single roller can be prevented from being sunk into a connecting seam between oil pipes, and vibration is avoided.
The central shaft 1 is provided with a plurality of spring slots c12 and d13, and the movable inclined strut 24 and the fixed inclined strut 21 are respectively provided with a spring slot b241 and a spring slot a211 near the connecting end connected with the wheel rod 23.
The spring grooves a211 and c12 correspond to each other, and the spring grooves b241 and d13 correspond to each other, for fixing the two ends of the spring 3.
The end part of the movable inclined strut 24 connected with the wheel rod 23 is provided with a slide rail 242.
The number of the plurality of roller frames 2 is at least 6.
The number of the rollers 22 uniformly arranged on the roller rod 23 is at least 3.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1) the sliding friction is changed into rolling friction by the roller, and the downhole resistance is small. 2) The vibration caused by the small resistance of the roller is small. 3) Because of the multiunit supports are independent supports, the change of a set of support diameter is little to the diameter influence of whole centralizer centering for the centralizer can laminate the oil pipe inner wall more. 4) When the centralizer passes through a coupling, two rollers always contact the pipe wall, and the centralizing diameter of the centralizer is not influenced when one roller does not contact the pipe wall according to the principle that a straight line is determined by two points.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A multi-wheel centralizer comprises a central shaft rod (1) and a plurality of roller carriers (2) distributed around the central shaft rod (1) in an annular array manner, wherein springs (3) are arranged between the roller carriers (2) and the central shaft rod (1), and the multi-wheel centralizer is characterized in that the plurality of roller carriers (2) are mutually independent, and a plurality of rollers (22) are arranged on the roller carriers (2).
2. A multi-wheel centralizer according to claim 1, characterized in that the central shaft (1) is provided with a first sleeve (11) and a second sleeve (14) on the outer side, and the two ends of the roller frame (2) are hinged with the first sleeve (11) and the second sleeve (14) on the outer side of the central shaft (1) respectively.
3. A multi-wheel centralizer according to claim 1, characterized in that the roller frame (2) comprises a fixed inclined strut (21), a roller rod (23), a movable inclined strut (24) and rollers (22), two ends of the roller rod (23) are respectively hinged with the fixed inclined strut (21) and the movable inclined strut (24), the other ends of the fixed inclined strut (21) and the movable inclined strut (24) are hinged with the central shaft rod (1), and a plurality of rollers (22) are uniformly arranged on the roller rod (23).
4. A multi-wheel centralizer according to claim 3, characterized in that the central shaft (1) is provided with a plurality of spring slots c (12) and d (13), and the movable diagonal brace (24) and the fixed diagonal brace (21) are provided with spring slots b (241) and a (211), respectively, near the connection end with the wheel bar (23).
5. A multi-wheel centralizer according to claim 4, characterized in that the spring slots a (211) correspond one-to-one to the spring slots c (12) and the spring slots b (241) correspond one-to-one to the spring slots d (13) for fixing both ends of the spring (3).
6. A multi-wheel centralizer according to claim 4, characterized in that the end part of the movable diagonal brace (24) connected with the wheel rod (23) is provided with a sliding rail (242).
7. A multi-wheel centralizer according to claim 1, characterised in that the plurality of roller frames (2) is at least 6.
8. A multi-wheel centralizer according to claim 3, characterised in that the wheel bar (23) is provided with at least 3 rollers (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010304045.3A CN111441731A (en) | 2020-04-17 | 2020-04-17 | Multi-wheel centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010304045.3A CN111441731A (en) | 2020-04-17 | 2020-04-17 | Multi-wheel centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111441731A true CN111441731A (en) | 2020-07-24 |
Family
ID=71653247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010304045.3A Pending CN111441731A (en) | 2020-04-17 | 2020-04-17 | Multi-wheel centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111441731A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4557327A (en) * | 1983-09-12 | 1985-12-10 | J. C. Kinley Company | Roller arm centralizer |
| CN2809192Y (en) * | 2005-05-11 | 2006-08-23 | 大庆石油管理局 | Eight-arm roller centralizer |
| CN201273154Y (en) * | 2008-09-27 | 2009-07-15 | 国营第三八八厂 | Elastic centralizer for pumping rod |
| CN201391245Y (en) * | 2009-04-17 | 2010-01-27 | 中国石油天然气集团公司 | Underground logging centralizer |
| CN201391243Y (en) * | 2009-03-20 | 2010-01-27 | 王洪达 | Spray gun centralizer |
| CN201679460U (en) * | 2010-05-25 | 2010-12-22 | 西安格威石油仪器有限公司 | Centralizer with eccentric mounting of left and right balance rollers |
| CN202157757U (en) * | 2011-06-23 | 2012-03-07 | 中国石油天然气股份有限公司 | Integral type roller centralizer |
| CN203188935U (en) * | 2013-04-02 | 2013-09-11 | 成都恩承油气有限公司 | Casing centralizer of resistance-reduction spring |
| CN206418975U (en) * | 2017-01-10 | 2017-08-18 | 北京华航无线电测量研究所 | A kind of compact rolling wheel centralizer |
| CN207660558U (en) * | 2017-11-30 | 2018-07-27 | 湖北天圜工程有限公司 | A kind of reducing centralizer |
| CN207863887U (en) * | 2017-12-12 | 2018-09-14 | 天津山远石油工具有限公司 | A kind of monoblock type arch casing stabbing board |
| CN108756775A (en) * | 2018-06-13 | 2018-11-06 | 大庆市晟威机械制造有限公司 | A kind of elastic oil pumping rod centering device in oil field |
| CN209990457U (en) * | 2019-05-29 | 2020-01-24 | 常熟市石油固井工具有限公司 | Telescopic casing centralizer |
-
2020
- 2020-04-17 CN CN202010304045.3A patent/CN111441731A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4557327A (en) * | 1983-09-12 | 1985-12-10 | J. C. Kinley Company | Roller arm centralizer |
| CN2809192Y (en) * | 2005-05-11 | 2006-08-23 | 大庆石油管理局 | Eight-arm roller centralizer |
| CN201273154Y (en) * | 2008-09-27 | 2009-07-15 | 国营第三八八厂 | Elastic centralizer for pumping rod |
| CN201391243Y (en) * | 2009-03-20 | 2010-01-27 | 王洪达 | Spray gun centralizer |
| CN201391245Y (en) * | 2009-04-17 | 2010-01-27 | 中国石油天然气集团公司 | Underground logging centralizer |
| CN201679460U (en) * | 2010-05-25 | 2010-12-22 | 西安格威石油仪器有限公司 | Centralizer with eccentric mounting of left and right balance rollers |
| CN202157757U (en) * | 2011-06-23 | 2012-03-07 | 中国石油天然气股份有限公司 | Integral type roller centralizer |
| CN203188935U (en) * | 2013-04-02 | 2013-09-11 | 成都恩承油气有限公司 | Casing centralizer of resistance-reduction spring |
| CN206418975U (en) * | 2017-01-10 | 2017-08-18 | 北京华航无线电测量研究所 | A kind of compact rolling wheel centralizer |
| CN207660558U (en) * | 2017-11-30 | 2018-07-27 | 湖北天圜工程有限公司 | A kind of reducing centralizer |
| CN207863887U (en) * | 2017-12-12 | 2018-09-14 | 天津山远石油工具有限公司 | A kind of monoblock type arch casing stabbing board |
| CN108756775A (en) * | 2018-06-13 | 2018-11-06 | 大庆市晟威机械制造有限公司 | A kind of elastic oil pumping rod centering device in oil field |
| CN209990457U (en) * | 2019-05-29 | 2020-01-24 | 常熟市石油固井工具有限公司 | Telescopic casing centralizer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5971404A (en) | Self-centering suspension for in-pipe use | |
| CN201391245Y (en) | Underground logging centralizer | |
| CN102300487B (en) | For the self-stabilization supporting component of furniture | |
| CN210948545U (en) | Drill rod guiding device | |
| CN103362460A (en) | Dislocated support-type centering guide for cased well logger | |
| CN103237669A (en) | Connecting strut | |
| CN110984879A (en) | Oil pipe type centralizer | |
| CN109654301A (en) | Three-dimensional variable force damping frame and working method based on metal-rubber pipeline | |
| CN111441731A (en) | Multi-wheel centralizer | |
| CN211848879U (en) | Device for improving shock resistance of bridge | |
| CN104634373A (en) | Centering device for pipeline inspection gauge | |
| CN208670272U (en) | Para-seismic support | |
| CN202974944U (en) | Probe floating rack mechanism for pipeline detectors | |
| CN205577877U (en) | Pump sending elasticity centralizer | |
| CN215374083U (en) | Precession vortex flowmeter that antidetonation was moved | |
| US20100252279A1 (en) | Reduced Drag Centralizer | |
| CN210889909U (en) | Mechanical shock absorption ring for measurement while drilling system | |
| CN208777918U (en) | A kind of anti-slip oil pumping rod centering device | |
| CN206874649U (en) | A kind of roller bearing of cable turntable bottom on subsea cable ship | |
| CN103171575B (en) | A kind of locomotive bindiny mechanism and locomotive three-axle bogie radial direction mechanism | |
| CN217354290U (en) | Non-rigid casing centralizer for well cementation | |
| CN204851093U (en) | Stabilizer | |
| CN217999487U (en) | Anti-inclination drilling tool assembly | |
| CN108915614A (en) | A kind of resistance absorber | |
| CN219045422U (en) | U-shaped steel support with reinforced structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200724 |