CN204371126U - Eccentric rotary centralizer - Google Patents
Eccentric rotary centralizer Download PDFInfo
- Publication number
- CN204371126U CN204371126U CN201420787277.9U CN201420787277U CN204371126U CN 204371126 U CN204371126 U CN 204371126U CN 201420787277 U CN201420787277 U CN 201420787277U CN 204371126 U CN204371126 U CN 204371126U
- Authority
- CN
- China
- Prior art keywords
- sucker rod
- eccentric rotary
- centralizer
- eccentric
- oil pipe
- 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.)
- Expired - Fee Related
Links
- 238000003754 machining Methods 0.000 claims description 7
- 238000007373 indentation Methods 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 abstract 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract 1
- 235000017491 Bambusa tulda Nutrition 0.000 abstract 1
- 241001330002 Bambuseae Species 0.000 abstract 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract 1
- 239000011425 bamboo Substances 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000931705 Cicada Species 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model relates to the technical field of oil field exploitation, in particular to an eccentric rotary centralizer, which comprises an anti-abrasion cylinder, a sucker rod short joint and a guide rod; the axis of the anti-abrasion cylinder and the axis of the inner cavity of the anti-abrasion cylinder are not on the same straight line, and the inner surface of the anti-abrasion cylinder is provided with a guide groove; the guide rod is arranged on the side face of the short joint of the sucker rod, and the outer diameter of the guide rod is smaller than the groove width of the guide groove; the anti-abrasion barrel is sleeved outside the short joint of the sucker rod, and the guide rod is positioned in the guide groove. The utility model discloses an eccentric rotatory centralizer, through eccentric rotation, when rotatory to different angles, the wear-resisting section of thick bamboo produces the contact eccentric wear with oil pipe's different faces, because eccentric rotation, the contact surface between eccentric rotatory centralizer and the oil pipe is multidirectional to be the timesharing contact, consequently, avoided only causing the oil pipe to grind the perforated condition at same point or line contact, prolonged oil pipe's life.
Description
Technical field
The utility model relates to oilfield exploitation technical field, particularly relates to a kind of eccentric rotary centralizer.
Background technology
Rotary centralizer is the one of centralizer, its spinfunction is mainly by rotary centralizer and tubing wall rubbing action, spiral limit on rotary centralizer promotes centralizer body and rotates, in prior art rotary centralizer due to only with same point or the linear contact lay of tube inner wall, easily be obstructed during rotation, the effect of even eccentric wear can not be played, easily cause the mill of oil pipe thoroughly to bore a hole, reduce the application life of oil pipe.
Utility model content
The utility model embodiment, by providing a kind of eccentric rotary centralizer, solves rotary centralizer in prior art and easily grinds the technical problem of oil pipe.
The utility model embodiment provides a kind of eccentric rotary centralizer, comprises anti-mill tube, pup joint of sucker rod and guide peg;
The axis of the axis of described anti-mill tube and the inner chamber of described anti-mill tube is not on same straight line, and the inner surface of described anti-mill tube is provided with gathering sill;
Described guide peg is arranged at the side of described pup joint of sucker rod, and the external diameter of described guide peg is less than the groove width of described gathering sill;
Described abrasionproof jacket casing is in the outside of described pup joint of sucker rod, and described guide peg is positioned at described gathering sill.
Preferably, beam hanger top connection and beam hanger lower contact is also comprised;
Described beam hanger top connection and described beam hanger lower contact are arranged at the two ends of described pup joint of sucker rod respectively.
Preferably, the internal diameter of described anti-mill tube is greater than the external diameter of described pup joint of sucker rod.
Preferably, the side of described sucker rod is provided with machining hole, and described guide peg is pressed in described machining hole by spring top.
Preferably, described gathering sill indentation.
Preferably, gathering sill described in is respectively set at the inner surface at the two ends of described anti-mill tube.
Preferably, guide peg described in is respectively set in the side at the two ends of described pup joint of sucker rod.
One or more technical schemes in the utility model embodiment, at least have following technique effect or advantage:
By arranging gathering sill in the anti-mill tube of bias, and guide peg is set in the corresponding position of pup joint of sucker rod, at abrasionproof jacket casing behind pup joint of sucker rod outside, guide peg is positioned at gathering sill, when moving up and down under the drive of pup joint of sucker rod at sucker rod, guide peg slides in gathering sill, anti-mill tube is driven to rotate relative to pup joint of sucker rod, thus eccentric rotary centralizer eccentric rotary, when rotating to different angles, anti-mill tube produces with the not coplanar of oil pipe and contacts eccentric wear, due to eccentric rotary, contact surface between eccentric rotary centralizer and oil pipe is multidirectional, and contact at times, therefore, avoid only in the situation that same point or linear contact lay cause oil pipe grinding thoroughly to bore a hole, extend the application life of oil pipe.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the structural representation of eccentric rotary centralizer in the utility model embodiment;
Fig. 2 is the sectional view of anti-mill tube 1 in the utility model embodiment;
Fig. 3 is the expansion schematic diagram of gathering sill 13 in the utility model embodiment;
Fig. 4 is the schematic diagram of relative position relation between eccentric rotary centralizer and oil pipe in the utility model embodiment;
Fig. 5 is the operating diagram of eccentric rotary centralizer in the utility model embodiment.
Wherein, 1 is anti-mill tube, and 2 is pup joint of sucker rod, and 3 is guide peg, and 4 is beam hanger top connection, and 5 is beam hanger lower contact, and 6 is oil pipe, and 7 is sucker rod, and 11 is the axis of abrasionproof tube inner chamber, and 12 is the axis of anti-mill tube, and 13 is gathering sill.
Detailed description of the invention
The technical problem of oil pipe is easily ground in order to solve rotary centralizer in prior art, the utility model embodiment provides a kind of eccentric rotary centralizer, by arranging gathering sill in the anti-mill tube of bias, and guide peg is set in the corresponding position of pup joint of sucker rod, at abrasionproof jacket casing behind pup joint of sucker rod outside, guide peg is positioned at gathering sill, when moving up and down under the drive of pup joint of sucker rod at sucker rod, guide peg slides in gathering sill, anti-mill tube is driven to rotate relative to pup joint of sucker rod, thus eccentric rotary centralizer eccentric rotary, contact surface between eccentric rotary centralizer and oil pipe is multidirectional, and contact at times, avoid only in the situation that same point or linear contact lay cause oil pipe grinding thoroughly to bore a hole, extend the application life of oil pipe.
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The application provides a kind of eccentric rotary centralizer, as shown in Figure 1, comprises anti-mill tube 1, pup joint of sucker rod 2 and guide peg 3.
Concrete, anti-mill tube 1 is for having the cylindrical shell of some strength, and not point-blank, this anti-mill tube 1 is eccentric anti-mill tube, as shown in Figure 2 for the axis 11 of the inner chamber that anti-mill tube 1 is offered and the axis 12 of anti-mill tube itself.The inner surface of anti-mill tube 1 is provided with gathering sill 13.Gathering sill 13 indentation, around being arranged at anti-mill tube 1 inner surface circumferentially, wherein, the expansion schematic diagram of gathering sill 13 as shown in Figure 3.
Concrete, pup joint of sucker rod 2 is connected between sucker rod 7 in oil pipe and sucker rod 7, and guide peg 3 is arranged at the side of pup joint of sucker rod 2, guide peg 3 is for coordinating with gathering sill 13, guide peg 3 can slide in gathering sill 13, and therefore, the external diameter of guide peg 3 is less than the groove width of gathering sill 13.Wherein, guide peg 3 can be arranged at the side of pup joint of sucker rod 2 by welding manner.In addition, preferably, the position first can installing guide peg 3 in the side of pup joint of sucker rod 2 arranges machining hole, then, and mounting spring in machining hole, thus guide peg 3 is pressed in machining hole by spring top.
Concrete, anti-mill tube 1 is placed on the outside of pup joint of sucker rod 2, and, make guide peg 3 be positioned at gathering sill 13.
The eccentric rotary centralizer of the application is connected with sucker rod 7, and eccentric rotary centralizer and sucker rod 7 are together positioned in oil pipe 6, when sucker rod 7 moves up and down, guide peg 3 slides in gathering sill 13, eccentric anti-mill tube 1 is driven to rotate relative to pup joint of sucker rod 2, thus eccentric rotary centralizer eccentric rotary, due to eccentric rotary, when the eccentric thick part of anti-mill tube 1 contacts with oil pipe 6, the sucker rod 7 of other adjacent segment can not contact with oil pipe 6, or contact surface is less, avoid sucker rod to contact with oil pipe and produce eccentric wear, and, eccentric rotary is when rotating to different angles, anti-mill tube 1 can be made to produce with the not coplanar of oil pipe 6 and to contact eccentric wear, contact surface between eccentric rotary centralizer and oil pipe 6 is multidirectional, and contact at times, therefore, avoid and only cause oil pipe 6 to grind the situation of perforation in same point or linear contact lay, extend the application life of oil pipe 6.
Preferably, in this application, the internal diameter of anti-mill tube 1 is greater than the external diameter of pup joint of sucker rod 2, thus make, between abrasionproof 1 and pup joint of sucker rod 2, there is certain gap, so that when sucker rod 7 up-down stroke, the sandstone that may be detained rinses out, and can not be deposited in gathering sill 13 or between anti-mill tube 1 and pup joint of sucker rod 2 because of sandstone, causes retardance to rotate.
Preferably, in this application, eccentric rotary centralizer also comprises beam hanger top connection 4 and beam hanger lower contact 5, and beam hanger top connection 4 and beam hanger lower contact 5 are arranged at the two ends of pup joint of sucker rod 2 respectively, and pup joint of sucker rod 2 is connected with sucker rod 7 by the joint at two ends.
In this application, for avoiding rotating inequality between anti-mill tube 1 and pup joint of sucker rod 2, preferably, a gathering sill 13 is respectively set at the inner surface at the two ends of anti-mill tube 1.Meanwhile, a guide peg 3 is respectively set in the side at the two ends of pup joint of sucker rod 2.The guide peg 3 at two ends lays respectively in the gathering sill 13 at corresponding two ends.When in motion, two synchronous slips in two gathering sills 13 of guide peg 3.
Need to illustrate time, according to the needs of practical application, the sucker rod 7 in oil pipe 6 can install multiple eccentric rotary centralizer additional, the direction of rotation of multiple eccentric rotary centralizer can be different, and namely multiple eccentric rotary centralizer can asynchronous movement.Such as, as shown in Figure 4, sucker rod 7 arranges two eccentric rotary centralizers, i.e. eccentric rotary centralizer A and eccentric rotary centralizer B, as shown in Figure 5, two eccentric rotary centralizer asynchronous movements, preferably, two eccentric rotary centralizer direction of rotation are contrary.
Technical scheme in above-mentioned the embodiment of the present application, at least has following technique effect or advantage:
By arranging gathering sill in the anti-mill tube of bias, and guide peg is set in the corresponding position of pup joint of sucker rod, at abrasionproof jacket casing behind pup joint of sucker rod outside, guide peg is positioned at gathering sill, when moving up and down under the drive of pup joint of sucker rod at sucker rod, guide peg slides in gathering sill, anti-mill tube is driven to rotate relative to pup joint of sucker rod, thus eccentric rotary centralizer eccentric rotary, when rotating to different angles, anti-mill tube produces with the not coplanar of oil pipe and contacts eccentric wear, due to eccentric rotary, contact surface between eccentric rotary centralizer and oil pipe is multidirectional, and contact at times, therefore, avoid only in the situation that same point or linear contact lay cause oil pipe grinding thoroughly to bore a hole, extend the application life of oil pipe.
Although described preferred embodiment of the present utility model, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the utility model scope.
Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.
Claims (7)
1. an eccentric rotary centralizer, is characterized in that, comprises anti-mill tube, pup joint of sucker rod and guide peg;
The axis of the axis of described anti-mill tube and the inner chamber of described anti-mill tube is not on same straight line, and the inner surface of described anti-mill tube is provided with gathering sill;
Described guide peg is arranged at the side of described pup joint of sucker rod, and the external diameter of described guide peg is less than the groove width of described gathering sill;
Described abrasionproof jacket casing is in the outside of described pup joint of sucker rod, and described guide peg is positioned at described gathering sill.
2. eccentric rotary centralizer as claimed in claim 1, is characterized in that, also comprise beam hanger top connection and beam hanger lower contact;
Described beam hanger top connection and described beam hanger lower contact are arranged at the two ends of described pup joint of sucker rod respectively.
3. eccentric rotary centralizer as claimed in claim 1, it is characterized in that, the internal diameter of described anti-mill tube is greater than the external diameter of described pup joint of sucker rod.
4. eccentric rotary centralizer as claimed in claim 1, it is characterized in that, the side of described sucker rod is provided with machining hole, and described guide peg is pressed in described machining hole by spring top.
5. eccentric rotary centralizer as claimed in claim 1, is characterized in that, described gathering sill indentation.
6. eccentric rotary centralizer as claimed in claim 1, is characterized in that, respectively arrange gathering sill described at the inner surface at the two ends of described anti-mill tube.
7. eccentric rotary centralizer as claimed in claim 1, is characterized in that, respectively arrange guide peg described in the side at the two ends of described pup joint of sucker rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420787277.9U CN204371126U (en) | 2014-12-11 | 2014-12-11 | Eccentric rotary centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420787277.9U CN204371126U (en) | 2014-12-11 | 2014-12-11 | Eccentric rotary centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204371126U true CN204371126U (en) | 2015-06-03 |
Family
ID=53327355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420787277.9U Expired - Fee Related CN204371126U (en) | 2014-12-11 | 2014-12-11 | Eccentric rotary centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204371126U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370222A (en) * | 2015-12-01 | 2016-03-02 | 中国石油天然气股份有限公司 | hydraulic eccentric centralizer for fishing spear |
-
2014
- 2014-12-11 CN CN201420787277.9U patent/CN204371126U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370222A (en) * | 2015-12-01 | 2016-03-02 | 中国石油天然气股份有限公司 | hydraulic eccentric centralizer for fishing spear |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 |