CN2898262Y - Sucker-rod stabilizer of supporting spiral pump - Google Patents
Sucker-rod stabilizer of supporting spiral pump Download PDFInfo
- Publication number
- CN2898262Y CN2898262Y CN 200620084360 CN200620084360U CN2898262Y CN 2898262 Y CN2898262 Y CN 2898262Y CN 200620084360 CN200620084360 CN 200620084360 CN 200620084360 U CN200620084360 U CN 200620084360U CN 2898262 Y CN2898262 Y CN 2898262Y
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- rod
- centralizer
- abrasion
- support member
- cylinder
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Abstract
The utility model provides a sucker rod centralizer for support-type screw pump production well, comprising a centralizer rod, an abrasion proof layer, an abrasion proof cylinder and a supporting part from inside to outside. An evenly abrasion proof layer with the thickness of 0.01 to 10mm is arranged on the cylindrical surface of the centralizer rod; the inner diameter of the abrasion proof cylinder is a little bigger than the external diameter of the abrasion proof layer; the abrasion proof cylinder wall thickness is 3 to 10mm and the inner surface is polished and abrasion-proof processed to form a friction pair with the centralizer rod; the supporting part is composed of a cylinder cover and a supporting edge; the cylinder cover of the supporting part is sleeved outside of the abrasion proof cylinder; the supporting edge of the supporting part is supported on the inner wall of the pipeline. The centralizer is arranged between two sucker rods and enters the oil pipe of the oil well. During operation, the rotating centralizer rod is considered as a rotating shaft of the bearing; the un-rotating abrasion proof cylinder is considered as the bushings; abrasion proof material with long service life is used for effectively avoiding the bias abrasion of the rod so as to increase the abrasion life; the supporting part does not rotate along with the centralizer and the flow between supporting edges can ensure the smooth flowing.
Description
Technical field:
The invention belongs to the oil exploitation device, especially be applicable to the screw pump oil production well oil pumping rod centering device.
Background technology:
Driven progressive is oilfield exploitation a kind of oil extraction system commonly used, and employing sucker rod rotary movement to the subsurface progressive cavity transferring power, drives the screw pump rotation by ground.Sucker rod rotatablely moves in oil pipe, if the R a T wearing and tearing will take place the contact of R a T inwall, this phenomenon is called rod and tube partial-wear.
In order to prevent eccentric wear, there has been multiple centralizer to be applied, centralizer is installed between two sucker rods, be lowered in the oil pipe of oil well, its basic principle is: the centralizer external diameter is greater than the sucker rod external diameter, when sucker rod departed from the oil pipe center during work, centralizer contacted with tube inner wall earlier, thereby avoids sucker rod to contact with tube inner wall.In order to alleviate the wearing and tearing to tube inner wall, the centralizer external surface is generally made by softer materials such as nylon, therefore, exists centralizer external surface intensity low, and the rate of wear is fast, the problem that the life-span is short.In addition, because the centralizer rotation, the liquid flow path of processing on the centralizer is affected, and the area of passage of liquid reduces in the oil pipe, has increased liquid flowing resistance, influences oil well production.
Summary of the invention:
The purpose of this utility model is that a kind of brace type screw pump oil production well oil pumping rod centering device will be provided, in case stopping bar pipe eccentric wear.
The purpose of this utility model be achieved in that the centralizer from-inner-to-outer by the centralizer body of rod, grind bearing layer, hold the rounding tube, support member is formed.Processing one layer thickness is the even grind bearing layer of 0.01～10mm on the periphery of the centralizer body of rod.Hold rounding tube internal diameter and be slightly larger than the grind bearing layer external diameter, holding the rounding tube is that wall thickness is the cylinder of 3～10mm, and its inner surface is through polishing and Wear-resistant Treatment, and a pair of friction pair of formation between the centralizer body of rod.Support member is made up of cylindrical sleeve and support rib, is liquid flow path between the support rib, and support member can adopt the elastomeric material manufacturing.The cylindrical sleeve of support member is enclosed within holds outside the rounding tube, can rely on interference to connect, and also can stick with glue or restraint zone reinforcement connection.The support rib of support member is supported on the tube inner wall, during work, holds rounding tube and support member and does not rotate.
Description of drawings:
Fig. 1 is the brace type screw pump oil production well oil pumping rod centering device structural representation that proposes according to the utility model.
Fig. 2 is the structural representation of support member in the brace type screw pump oil production well oil pumping rod centering device that proposes according to the utility model.
Among the figure, the 1-centralizer body of rod, 2-grind bearing layer, 3-hold the rounding tube, 4-support member, the cylindrical sleeve of 5-support member, the support rib of 6-support member, 7-fluid flowing passage, 8-oil pipe.
The specific embodiment:
Describe the utility model in detail below in conjunction with accompanying drawing.
As shown in Figure 1, centralizer from inside to outside by the centralizer body of rod 1, grind bearing layer 2, hold rounding tube 3, support member 4 is formed.Centralizer is installed between two sucker rods, is connected with sucker rod by screw thread, is lowered in the oil pipe of oil well.
The centralizer body of rod 1 is similar to sucker rod substitute material, structure and performance, and just the body diameter of the centralizer body of rod can change as required.Process the grind bearing layer 2 that a layer thickness is 0.01～10mm at the external surface of the centralizer body of rod 1, can adopt modes such as powder metallurgy, spraying to process, with centralizer body of rod cylindrical-concentric, any surface finish, better with peripheral milling processing or polishing.The effect of grind bearing layer is a taking up wear, because on its cylinder attached to the centralizer body of rod, need not bear axial tension and moment of torsion that the centralizer body of rod is born, therefore, its anti-wear performance is mainly considered in the manufacturing of grind bearing layer.During work, the centralizer body of rod 1 and grind bearing layer 2 rotate with sucker rod.
The rounding tube 3 that holds that is enclosed within the centralizer body of rod 1 and grind bearing layer 2 outsides is the bright and clean wear-resisting cylinder of 3～10mm, internal circular surfaces for wall thickness, can adopt metal bar or tubing machining, also available powder metallurgy mode is processed, better with processing of interior circle mill or polishing effect, the effect of holding rounding tube 3 is taking up wears, and it and body of rod grind bearing layer constitute a pair of friction pair.Therefore, its anti-wear performance is mainly considered in the manufacturing of holding the rounding tube.
Hold rounding tube 3 outsides and connect support member 4, as shown in Figure 2, support member 4 is made up of cylindrical sleeve 5 and support rib 6, is liquid flow path between the support rib, and support member can adopt the elastomeric material manufacturing.The round buss of support member is enclosed within and holds outside the rounding tube, can rely on interference to connect, and also can stick with glue or restraint zone reinforcement connection.The support rib of support member is supported on the tube inner wall, during work, holds rounding tube and support member and does not rotate.
Because the frictional force between rubber and the tube inner wall metal is greater than grind bearing layer and hold frictional force between the rounding tube, thus its external diameter greater than, be equal to or slightly less than pipe aperture and can guarantee that all support member and the rounding tube that holds that is attached thereto thereof do not follow the centralizer body of rod and rotate.The cone shape should be processed in the support member end, and be convenient to centralizer and be lowered in the oil pipe with sucker rod less than pipe aperture at the minimum outer diameter place.Support rib can be processed into and be parallel to the vertical bar shape of holding rounding tube direction, also can be processed into around holding the spiral-shaped of rounding tube.Add nonmetal silk thread in the support member rubber and strengthen its intensity the best.Support member outer diameter is during greater than pipe aperture, and under the support rib free state situation of support member, its external diameter is greater than pipe aperture, and the back is less than pipe aperture by compression, and being installed in the oil pipe has certain interference with oil pipe.
During work, the centralizer body of rod of rotation is equivalent to the rotating shaft of bearing, and the non-rotary rounding tube that holds is equivalent to bearing shell, becomes a pair of friction pair.Answer the coadapted high life high-abrasive material of adapted, thereby improve wear-out life.Because with the centralizer rotation, the liquid flow path between its upper support rib can not keep liquid flow unimpeded to support member.The utility model is simple in structure, and is easy to process, with low cost, long service life.It is aboveground to be installed in screw pump oil production, can avoid the friction between rod string and oil pipe, prevents eccentric wear between sucker rod and the oil pipe effectively.
Have advantage and effect according to the brace type screw pump oil production well oil pumping rod centering device that the utility model proposed:
1. the utility model adopts special-purpose support member, and support member adopts the elastomeric material manufacturing, and certain elasticity is arranged, be supported on the tube inner wall, support member with hold the rounding tube and be connected, guarantee support member and hold the rounding tube and do not rotate.
2. changed the position of wearing and tearing, the whole rotation of centralizer originally, and directly wearing and tearing between the oil pipe.The utility model is that grind bearing layer and non-rotary the holding between the rounding tube on the centralizer body of rod worn and torn mutually, becomes a pair of friction pair.Because friction pair does not bear axial load and moment of torsion, needn't consider strength problem, but the coadapted high life high-abrasive material of adapted, thus wear-out life improved.
3. avoided the inhibition of centralizer rotation to liquid flow, between the support rib of support member liquid flow path is arranged, during work, support member does not rotate, the liquid flow path fixed-site has been avoided the inhibition of common centralizer rotation to liquid flow path.
4. played good centralizing function, existing centralizer is for fear of the obstruction to liquid flow, and the centralizer external diameter is less than more than the pipe aperture 5mm, and sucker rod can not be fine placed in the middle.The centralizer external diameter that the utility model proposed is equal to or slightly less than pipe aperture, can make sucker rod be in the middle position.
Claims (3)
1. brace type screw pump oil production well oil pumping rod centering device, it is characterized in that from-inner-to-outer by the centralizer body of rod (1), grind bearing layer (2), hold rounding tube (3), support member (4) is formed, the even grind bearing layer of processing one deck on the periphery of the centralizer body of rod (1), hold rounding tube internal diameter and be slightly larger than the grind bearing layer external diameter, holding rounding tube (3) is the cylinder of 3～10mm for wall thickness, its inner surface is through polishing and Wear-resistant Treatment, and a pair of friction pair of formation between the centralizer body of rod; Support member (4) is made up of cylindrical sleeve (5) and support rib (6), and the cylindrical sleeve of support member (5) is enclosed within holds outside the rounding tube (3), and support rib (6) is supported on oil pipe (8) inwall.
2. centralizer according to claim 1 is characterized in that grind bearing layer (2) thickness on the said centralizer body of rod (1) is 0.01～10mm, and is concentric with the body of rod, adopts the processing of powder metallurgy or spraying method.
3. centralizer according to claim 1 is characterized in that said support rib (6) can be processed into and is parallel to the vertical bar shape of holding rounding tube (3) direction, or is processed into around holding the spiral-shaped of rounding tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620084360 CN2898262Y (en) | 2006-05-13 | 2006-05-13 | Sucker-rod stabilizer of supporting spiral pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620084360 CN2898262Y (en) | 2006-05-13 | 2006-05-13 | Sucker-rod stabilizer of supporting spiral pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2898262Y true CN2898262Y (en) | 2007-05-09 |
Family
ID=38073598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620084360 Expired - Fee Related CN2898262Y (en) | 2006-05-13 | 2006-05-13 | Sucker-rod stabilizer of supporting spiral pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2898262Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994488A (en) * | 2009-08-25 | 2011-03-30 | 罗绍东 | Screw pump well sucker rod centralizer with bidirectional protection effect |
| CN102839924A (en) * | 2011-06-23 | 2012-12-26 | 中国石油天然气股份有限公司 | Sucker rod centralizer lubricated by high pressure well fluid |
| CN108222856A (en) * | 2016-12-12 | 2018-06-29 | 四川煜天石油机械设备有限公司 | Wear-resisting rotary centralizer |
| CN111537337A (en) * | 2020-05-06 | 2020-08-14 | 中国石油大学(华东) | Method for processing clamping part of hollow sucker rod fatigue test sample |
-
2006
- 2006-05-13 CN CN 200620084360 patent/CN2898262Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994488A (en) * | 2009-08-25 | 2011-03-30 | 罗绍东 | Screw pump well sucker rod centralizer with bidirectional protection effect |
| CN102839924A (en) * | 2011-06-23 | 2012-12-26 | 中国石油天然气股份有限公司 | Sucker rod centralizer lubricated by high pressure well fluid |
| CN102839924B (en) * | 2011-06-23 | 2015-05-13 | 中国石油天然气股份有限公司 | Sucker rod centralizer lubricated by high pressure well fluid |
| CN108222856A (en) * | 2016-12-12 | 2018-06-29 | 四川煜天石油机械设备有限公司 | Wear-resisting rotary centralizer |
| CN111537337A (en) * | 2020-05-06 | 2020-08-14 | 中国石油大学(华东) | Method for processing clamping part of hollow sucker rod fatigue test sample |
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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: 20070509 |