CN104895510A - Slip ring type centering device - Google Patents
Slip ring type centering device Download PDFInfo
- Publication number
- CN104895510A CN104895510A CN201510318959.4A CN201510318959A CN104895510A CN 104895510 A CN104895510 A CN 104895510A CN 201510318959 A CN201510318959 A CN 201510318959A CN 104895510 A CN104895510 A CN 104895510A
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- Prior art keywords
- centralizer
- ring
- slip ring
- main body
- centering device
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- 230000000903 blocking effect Effects 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract description 15
- 238000010168 coupling process Methods 0.000 abstract description 15
- 238000005859 coupling reaction Methods 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000003129 oil well Substances 0.000 abstract description 4
- 230000002265 prevention Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 238000005299 abrasion Methods 0.000 description 7
- 238000005086 pumping Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides a slip ring type centering device. The slip ring type centering device comprises a centering slip ring, a falling prevention separation blade with a through hole at the center and a centering device main body of a cylinder structure, wherein the centering slip ring is a hollow round ring, arc bulges are arranged on the surface of the round ring, the axis of the arc bulges is parallel to the axis of the round ring, the inner diameter of the round ring is larger than the diameter of two ends of the cylindrical centering device main body, and smaller than the diameter of a portion of the cylindrical centering device main body, located between the two ends of the cylindrical centering device main body, screw holes coaxial with the centering device main body are formed in the two ends of the cylindrical centering device main body, the screw holes are adaptive to outer threads, one end of the centering device main body passes through one end of the centering slip ring, and is stretched out of the other end of the centering slip ring or flush with the other end of the centering slip ring, the end of a sucker rod passes through the through hole in the falling prevention separation blade, and then an outer thread at the end of the sucker rod is fixed in the screw holes in the two ends of the cylindrical centering device main body. The slip ring type centering device does not influence an oil flow channel, prevents the phenomena that wax is precipitated on a coupling position, grit is gathered and cemented and the like, prolongs a production cycle of an oil well, and improves production efficiency of the oil well.
Description
Technical Field
The invention belongs to a sucker-rod pump oil production device, and particularly relates to a slip ring type centralizer.
Background
At present there is the sucker-rod pump oil recovery in-process, has the problem of pipe pole eccentric wear, and the leading cause of pipe pole eccentric wear has: (1) the deviation of the well causes the bending of the production pipe column, which causes the eccentric wear of the pipe rod, and the larger the well deviation is, the more serious the eccentric wear of the sucker rod is; (2) the pipe column is bent due to pressurization and anchoring of the pipe column, so that eccentric wear of a pipe rod is caused, and the larger the pressurization load is, the larger the bending degree of the oil pipe is; (3) the sucker rod string is subjected to bending deformation under the influence of alternating load in work, so that eccentric wear of a pipe rod is caused; (4) the change of the liquid outlet property accelerates the eccentric wear speed of the sucker rod, and the higher the water content is, the more serious the eccentric wear is.
In order to improve the condition of friction and abrasion between the sucker rod and the oil pipe wall, the main measure is to apply a sucker rod centralizer. The friction between the centralizer and the oil pipe is used for replacing the friction between the oil pipe and the sucker rod to prevent eccentric wear of the pipe rod. The centralizer can be divided into a sliding type centralizer and a rolling type centralizer according to the friction property between the centralizer and the oil pipe wall.
The abrasion caused by sliding friction is more serious than rolling friction, and the existing sliding centralizer is used for protecting the oil pipe and the sucker rod by a method of consuming the centralizer in order to protect the oil pipe; the rolling centralizer is usually installed on two pumping rods directly and manufactured into a lengthened coupling to replace a common pumping rod coupling, but in order to meet the technical requirements of roller or ball installation, the diameter of the rolling centralizer is large, the quality of the pumping rod coupling is concentrated, the contact between the roller centralizer coupling and the wall of an oil pipe is easy to generate friction and abrasion, no matter whether sliding or rolling centralization is adopted, in order to prevent eccentric abrasion of the rod pipe, the existing underground process design adopts a connection process of combining the centralizer and the oil pipe coupling, a connecting rod column prevents eccentric abrasion, the centralizer diameter is larger than the oil pipe coupling, the use period of the centralization process is short, the oil flow passage in the oil pipe is reduced, and meanwhile, the phenomena of wax precipitation, sand and cement accumulation and the like are easy to occur at the oil pipe coupling to influence normal production.
Disclosure of Invention
The invention aims to provide a slip ring type centralizer, and aims to solve the problems that the conventional centralizer has a short period, an oil flow channel in an oil pipe is reduced, and a coupling is easy to wax deposition, gravel aggregation and cementation and the like.
The invention is realized in this way, a slip ring type centralizer, cooperate with sucker rod to use, including centering the slip ring, the centre has anti-drop separation blades of the through hole, the cylindrical centralizer body; wherein,
the end part of the sucker rod is provided with an external thread, an annular convex brim is arranged at the position close to the external thread, and the diameter of the convex brim is larger than that of the through hole;
the centering sliding ring is a hollow circular ring, and the surface of the circular ring is provided with an arc bulge which has a parallel axis with the circular ring; the inner diameter of the circular ring is larger than the diameters of the two ends of the cylinder of the centralizer main body and smaller than the diameter of the cylinder part between the two ends; screw holes which are coaxial with the centralizer main body are formed in the two ends of the cylinder, and the screw holes are matched with the external threads;
one end part of the centralizer body penetrates through one end of the centering sliding ring and extends out or is flush with the other end part of the centering sliding ring, and the end part of the sucker rod penetrates through the through hole of the anti-falling blocking piece and then is fixed in the screw hole at the end part of the centralizer body through the external thread at the end part of the sucker rod.
Preferably, the number of the circular arc bulges of the centering slip ring is 3, and the 3 circular arc bulges are symmetrically distributed on the surface of the circular ring.
Preferably, the centralizer body is made of a 35CrMn material; the centering sliding ring is made of stainless steel, and the centering sliding ring is polished inside and outside.
The invention overcomes the defects of the prior art, provides a slip ring type centralizer, has the function of eccentric wear prevention and centralization of a sucker rod coupling, is designed under the condition of not changing the diameter size according to the design parameter requirements of the existing sucker rod coupling, forms a sucker rod coupling centralizer with centralization function without influencing an oil flow channel, prevents the phenomena of wax deposition, sand aggregation and cementation and the like at the coupling, prolongs the production period of an oil well, and improves the production efficiency of the oil well.
Drawings
FIG. 1 is a schematic structural view of a slip-ring centralizer of the present invention;
FIG. 2 is a schematic structural view of a centralizer body in the slip-ring centralizer of the present invention;
FIG. 3 is a schematic view of the structure of a centering ring of the slip-ring centering device of the present invention;
FIG. 4 is an exploded view of the slip ring centralizer of the present invention in use with a sucker rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 4, fig. 1 is a schematic structural view of the slip ring type centralizer of the present invention; FIG. 2 is a schematic structural view of a centralizer body in the slip-ring centralizer of the present invention; FIG. 3 is a schematic view of the structure of a centering ring of the slip-ring centering device of the present invention; FIG. 4 is an exploded view of the slip ring centralizer of the present invention in use with a sucker rod.
A slip ring type centralizer is matched with a sucker rod 1 for use and comprises a centralizing slip ring 2, an anti-drop baffle 3 with a through hole in the center and a cylindrical centralizer body 4; wherein,
the end part of the sucker rod 1 is provided with an external thread 1-1, an annular convex brim 1-2 is arranged at the position close to the external thread 1-1, and the diameter of the convex brim 1-2 is larger than that of the through hole of the anti-falling blocking piece 3;
the centering sliding ring 2 is a hollow ring, and the surface of the ring is provided with an arc bulge 2-1 with a parallel axis with the ring; the inner diameter of the circular ring is larger than the diameters of the two ends of the cylinder of the centralizer body 4 and smaller than the diameter of the cylinder part between the two ends; screw holes 4-1 which are coaxial with the centralizer body 4 are formed in the two ends of the cylinder, and the screw holes 4-1 are matched with the external threads 1-1;
one end part of the centralizer main body 4 penetrates through one end of the centralizing slip ring 2 and extends out of or is flush with the other end part of the centralizing slip ring 2, and the end part of the sucker rod 1 penetrates through the through hole of the anti-falling baffle 3 and then is fixed in a screw hole 4-1 at the end part of the centralizer main body 4 through an external thread 1-1 at the end part.
In the embodiment of the invention, after the sucker rod 1 and the centralizer body 4 are fixed, the centralizing slip ring 2 is sleeved at one end part of the centralizer body 4 and can freely rotate along the axis of the centralizer body 4, and in addition, the centralizing slip ring 2 is effectively ensured to move in a preset displacement range due to the supporting action of the convex cap edge 1-2 on the anti-falling blocking sheet 3 and the supporting action of the middle part of the cylinder of the centralizer body 4 on the centralizing slip ring 2. And finally, the assembled slip ring type centralizer is loaded into the oil pipe.
In the practical application process of the invention, the centralizer body 4 should be made of 35CrMn material and have high tensile strength, and meanwhile, the hardness of the centralizer body 4 should be smaller than that of the sucker rod 1, so as to avoid damaging the sucker rod 1.
The centering sliding ring 2 is made of stainless steel, so that the corrosion resistance of the centering sliding ring can be greatly improved, and meanwhile, the centering sliding ring 2 is polished inside and outside, so that the friction between the centering sliding ring and the sucker rod can be reduced. In addition, the arc bulges 2-1 of the centering sliding ring 2 are designed as the outer arcs of the middle thick waist drum of the right triangle, the three arc bulges 2-1 are symmetrically distributed on the stool surface of the centering sliding ring 2, and the axes of the arc bulges 2-1 are completely consistent with the radian of the inner wall of the oil pipe. From this, the incline direction of centering sliding ring 2 ability automatic judgement sucker rod 1, quick autogiration, the wear-resisting face of centering sliding ring 2 coincide with the oil pipe inner wall, area of contact is 20 times bigger than traditional centralizer, then pressure just reduces 20 times relatively, change the point of traditional centralizer, line contact mode for the face contact, and can form one deck polymer film on the contact surface, the effectual mill that has reduced hinders, the friction has been reduced, this has guaranteed that vice card of friction can not take place at the oil pumping in-process is dead and the phenomenon of immobility.
In the practical application process of the invention, the centering sliding rings 2 are arranged at both ends of the centralizer body 4, when the centralizer is contacted with an oil pipe interface, the mutual cutting abrasion of the centralizer and the end surface of the oil pipe is avoided, simultaneously the problems of jitter and instability of the sucker rod 1 are solved, the impact is effectively avoided, the centralizer is stably scratched, the alternating load is effectively reduced, and the sucker rod 1 and the pumping unit are stably operated; and the outer diameter of the slip ring type centralizer is larger than that of the sucker rod 1 coupling, so that the contact between the sucker rod 1 coupling and the related contact is effectively avoided, and the tripping probability of the sucker rod 1 is reduced.
Compared with the defects and shortcomings of the prior art, the invention has the following beneficial effects:
(1) the invention has good antifriction property and the sliding ring type free rotation design, can ensure that the friction is uniformly distributed, and effectively reduces the axial pressure and the suspension point load of the sucker rod string;
(2) the invention has better centralizing effect, and can prevent the rod pipe from generating friction abrasion after the sucker rod string is bent;
(3) the invention can bear a certain transverse load and can effectively prevent the oil pumping pipe from loosening and releasing the buckle;
(4) the relatively small cross-sectional area of the present invention provides a large effective oil flow passage for oil flow in the unit column space.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. A slip ring type centralizer is matched with a sucker rod for use and is characterized by comprising a centralizer slip ring, an anti-drop baffle plate with a through hole in the center and a cylindrical centralizer main body; wherein,
the end part of the sucker rod is provided with an external thread, an annular convex brim is arranged at the position close to the external thread, and the diameter of the convex brim is larger than that of the through hole;
the centering sliding ring is a hollow circular ring, and the surface of the circular ring is provided with an arc bulge which has a parallel axis with the circular ring; the inner diameter of the circular ring is larger than the diameters of the two ends of the cylinder of the centralizer main body and smaller than the diameter of the cylinder part between the two ends; screw holes which are coaxial with the centralizer main body are formed in the two ends of the cylinder, and the screw holes are matched with the external threads;
one end part of the centralizer body penetrates through one end of the centering sliding ring and extends out or is flush with the other end part of the centering sliding ring, and the end part of the sucker rod penetrates through the through hole of the anti-falling blocking piece and then is fixed in the screw hole at the end part of the centralizer body through the external thread at the end part of the sucker rod.
2. The slip-ring centralizer of claim 1, wherein the number of the arc bulges of the centralizing slip ring is 3, and the 3 arc bulges are symmetrically distributed on the surface of the slip ring.
3. The slip-ring centralizer of claim 2 wherein the centralizer body is fabricated from 35 CrMn; the centering sliding ring is made of stainless steel, and the centering sliding ring is polished inside and outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510318959.4A CN104895510A (en) | 2015-06-11 | 2015-06-11 | Slip ring type centering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510318959.4A CN104895510A (en) | 2015-06-11 | 2015-06-11 | Slip ring type centering device |
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| Publication Number | Publication Date |
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| CN104895510A true CN104895510A (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510318959.4A Pending CN104895510A (en) | 2015-06-11 | 2015-06-11 | Slip ring type centering device |
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| CN (1) | CN104895510A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255018A (en) * | 2017-07-11 | 2017-10-17 | 深圳市远东石油钻采工程有限公司 | A kind of non-rotation centralizer of variable-diameter roller type |
| CN108412433A (en) * | 2018-05-18 | 2018-08-17 | 淮安市井神钻采机具有限公司 | Anticreep high temperature resistance high pressure oil pumping rod centering device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4787448A (en) * | 1987-08-18 | 1988-11-29 | Sable Donald E | Rod guide |
| CN2133666Y (en) * | 1992-03-21 | 1993-05-19 | 马学山 | Sucker rod with oil pumping function |
| CN2308705Y (en) * | 1997-10-28 | 1999-02-24 | 樊玉兰 | Oil pumping rod |
| CN201306127Y (en) * | 2008-11-10 | 2009-09-09 | 郑文光 | Double curved surface protective sucker rod coupling |
| CN101832111A (en) * | 2010-04-28 | 2010-09-15 | 中国科学院力学研究所 | Bi-directionally sliding pup-joint coupling centralizer |
| CN201650150U (en) * | 2010-03-12 | 2010-11-24 | 陈晓辉 | Novel elastically-supported wear-resistant and wear-reducing pair |
| CN204877308U (en) * | 2015-06-11 | 2015-12-16 | 西南石油大学 | Sliding ring formula centralizer |
-
2015
- 2015-06-11 CN CN201510318959.4A patent/CN104895510A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4787448A (en) * | 1987-08-18 | 1988-11-29 | Sable Donald E | Rod guide |
| CN2133666Y (en) * | 1992-03-21 | 1993-05-19 | 马学山 | Sucker rod with oil pumping function |
| CN2308705Y (en) * | 1997-10-28 | 1999-02-24 | 樊玉兰 | Oil pumping rod |
| CN201306127Y (en) * | 2008-11-10 | 2009-09-09 | 郑文光 | Double curved surface protective sucker rod coupling |
| CN201650150U (en) * | 2010-03-12 | 2010-11-24 | 陈晓辉 | Novel elastically-supported wear-resistant and wear-reducing pair |
| CN101832111A (en) * | 2010-04-28 | 2010-09-15 | 中国科学院力学研究所 | Bi-directionally sliding pup-joint coupling centralizer |
| CN204877308U (en) * | 2015-06-11 | 2015-12-16 | 西南石油大学 | Sliding ring formula centralizer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255018A (en) * | 2017-07-11 | 2017-10-17 | 深圳市远东石油钻采工程有限公司 | A kind of non-rotation centralizer of variable-diameter roller type |
| CN108412433A (en) * | 2018-05-18 | 2018-08-17 | 淮安市井神钻采机具有限公司 | Anticreep high temperature resistance high pressure oil pumping rod centering device |
| CN108412433B (en) * | 2018-05-18 | 2019-05-17 | 淮安市井神钻采机具有限公司 | Anticreep high pressure oil pumping rod centering device resistant to high temperatures |
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Application publication date: 20150909 |