CN212201937U - Sucker rod centralizer - Google Patents
Sucker rod centralizer Download PDFInfo
- Publication number
- CN212201937U CN212201937U CN202020737391.6U CN202020737391U CN212201937U CN 212201937 U CN212201937 U CN 212201937U CN 202020737391 U CN202020737391 U CN 202020737391U CN 212201937 U CN212201937 U CN 212201937U
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- sleeve
- sucker rod
- clamping sleeve
- centering sleeve
- centering
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Abstract
The utility model provides a sucker rod centralizer. Relates to the technical field of oil extraction machines. The clamping sleeve and the centering sleeve are both of a semi-cylinder structure and are connected into a cylinder sleeve through bolts, the excircle of the clamping sleeve is in clearance fit connection with the inner hole of the centering sleeve, and the centering sleeve and the clamping sleeve are provided with annular grooves and annular holes on the fit surface of the clamping sleeve and the centering sleeve to be provided with nylon rings. The utility model discloses following beneficial effect has: the clamping sleeve, the centering sleeve and the nylon rings of the half bodies can be installed outside the sucker rod, the structure is suitable for the structural characteristics that the middle of a continuous sucker rod is not provided with a joint, the centering sleeve can be positioned and rotated on the clamping sleeve to prevent the carbon fiber sucker rod from being distorted when the centering sleeve rotates and reduce the tensile strength, lubricating oil is filled in the cavity to keep the lubrication of the rotating surface and reduce the friction force, the centering sleeve rotates flexibly, the nylon rings arranged on the upper side and the lower side of the lubricating oil cavity play a role in sealing, and external dirty oil and impurities are prevented from entering the rotating fit surface, so that the centering sleeve fails to rotate.
Description
The technical field is as follows:
the utility model relates to an oil production machines technical field, concretely relates to sucker rod centralizer.
Background art:
the carbon fiber has two characteristics of strong tensile resistance of carbon materials and soft machinability of the fiber, the specific gravity is not 1/4 of steel, but the strength is 7-9 times of that of steel, the continuous sucker rod produced by applying the carbon fiber reinforced composite material can reach 5000 meters at most, the defects that the prior sucker rod needs sleeve rod connection, the working time of tripping up and down a drill is long, a metal rod is easy to corrode, the service life is short, the power consumption in operation is large and the like are successfully overcome, and the carbon fiber reinforced composite material continuous sucker rod and other high-strength carbon fiber continuous sucker rods are used.
The utility model has the following contents:
in order to solve the problem, the utility model aims at providing a sucker rod centralizer.
The technical scheme of the utility model is that: a sucker rod centralizer comprises a clamping sleeve and a centralizing sleeve, wherein the clamping sleeve and the centralizing sleeve are of a semi-cylinder structure and are connected into a cylinder sleeve through bolts, a section of stepped shaft with a reduced diameter is arranged on the outer circular surface of the clamping sleeve, a section of stepped hole with a reduced diameter is arranged in the inner hole of the centralizing sleeve, the stepped hole of the centralizing sleeve and the stepped shaft of the clamping sleeve are in clearance fit connection in the length direction, the outer circular surface of the clamping sleeve and the inner hole of the centralizing sleeve are in clearance fit connection, a cavity is formed between the outer circular surface of the stepped shaft and the inner hole of the stepped hole, and lubricating oil is filled;
three annular holes are respectively formed in the inner hole of the centering sleeve, annular grooves are formed in the outer circular surface of the clamping sleeve corresponding to each annular hole, a nylon ring is mounted in a space formed by each annular groove and the annular hole, and the nylon ring is in clearance fit connection with the annular holes and the annular grooves;
the nylon ring is a half ring and an integral ring, and the joint surface of the two half rings is an inclined opening surface;
the size of the central hole of the clamping sleeve is in interference fit with the excircle of the carbon fiber sucker rod.
The outer circle surface of the centering sleeve is provided with evenly distributed overflowing grooves, and two cylindrical end surfaces of the centering sleeve are provided with guide cones.
The both ends of centre bore of centre gripping cover all are equipped with the transition taper hole of diameter grow.
The clamping sleeve and the centralizing sleeve are made of stainless steel.
The utility model discloses following beneficial effect has: the clamping sleeve, the centering sleeve and the nylon ring of the half bodies can be installed outside the carbon fiber sucker rod, the carbon fiber sucker rod centering sleeve is suitable for the structural characteristics that a joint does not exist in the middle of a continuous sucker rod, the centering sleeve in clearance fit can be positioned and rotated on the clamping sleeve, so that the carbon fiber sucker rod is prevented from being distorted when the centering sleeve rotates, the tensile strength is reduced, lubricating oil is filled in the cavity, the lubrication of the rotating surface is kept, the friction force is reduced, the centering sleeve is kept to rotate flexibly, a plurality of nylon rings are arranged on the upper side and the lower side of the lubricating oil cavity to play a sealing role, external dirty oil and impurities are prevented from entering the rotating matching surface, the centering sleeve is enabled to be out of rotation, the inclined opening surface of the nylon ring can enable the two half ring joint surfaces.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is a schematic structural diagram of a nylon ring in the present invention.
In the figure, 1-a centering sleeve, 2-a flow passing groove, 3-a cavity, 4-a nylon ring, 5-a guide cone, 6-a clamping sleeve, 7-a transition taper hole, 8-a central hole, 9-a step shaft, 10-an inclined opening surface, 11-a ring hole, 12-a ring groove and 13-a step hole.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings:
as shown by the combination of figure 1 and figures 2-3, the sucker rod centralizer comprises a clamping sleeve 6 and a centralizing sleeve 1, wherein the clamping sleeve 6 and the centralizing sleeve 1 are both in a semi-cylinder structure and are connected into a cylinder sleeve through bolts, the outer circular surface of the clamping sleeve 6 is provided with a step shaft 9 with a reduced diameter, the inner hole of the centralizing sleeve 1 is provided with a step hole 13 with a reduced diameter, the step hole 13 of the centralizing sleeve 1 is in clearance fit connection with the step shaft 9 of the clamping sleeve 6 in the length direction, the outer circular surface of the clamping sleeve 6 is in clearance fit connection with the inner hole of the centralizing sleeve 1, the centralizing sleeve 1 in clearance fit can be positioned and rotated on the clamping sleeve 6, the carbon fiber sucker rod is prevented from being distorted when the centering sleeve 1 rotates, the tensile strength is reduced, a cavity 3 is formed between the outer circular surface of the stepped shaft 9 and the inner hole of the stepped hole 13, lubricating oil is filled in the cavity 3 to keep the rotating surface lubricated, the friction force is reduced, and the centering sleeve 1 is kept to rotate flexibly;
three annular holes 11 are respectively formed in the inner hole of the centering sleeve 1, annular grooves 12 are formed in the outer circular surface of the clamping sleeve 6 corresponding to each annular hole 11, a nylon ring 4 is arranged in a space formed by each annular groove 12 and each annular hole 11, and the nylon ring 4 is in clearance fit connection with the annular holes 11 and the annular grooves 12;
the nylon ring 4 is a half ring and an integral ring, the joint surface of the two half rings is an inclined opening surface 10, the plurality of nylon rings 4 are arranged on the upper side and the lower side of the lubricating oil cavity 3 to play a role in sealing, so that external dirty oil and impurities are prevented from entering a rotating joint surface, the centering sleeve 1 is enabled to be out of rotation, the inclined opening surfaces 10 of the nylon rings 4 can enable the joint surfaces of the two half rings to be overlapped together, and the sealing effect is improved;
8 sizes of centre bore and the carbon fiber sucker rod excircle interference fit of centre gripping cover 6, 6 interference fit centre grippings of centre gripping cover are on the carbon fiber sucker rod, and centre gripping cover 6 can not change at the clamping position of sucker rod, prevents that centralizer from changing the clamping position under the effect of external force and causing to lose the effect of rightting, and the centre gripping cover 6 of halfbody, right cover 1 and nylon ring 4 can install in the carbon fiber sucker rod outside, and the centre that adapts to continuous sucker rod does not have the structural feature who connects.
The outer circle surface of the centering sleeve 1 is provided with evenly distributed flow passing grooves 2 for crude oil to pass through, and two cylindrical end faces of the centering sleeve 1 are provided with guide cones 5 which serve as guide effects when the centering sleeve moves up and down, so that the occurrence of clamping stagnation is reduced.
The 8 both ends of centre bore of centre gripping cover 6 all are equipped with the transition taper hole 7 of diameter grow, and the effect in transition hole makes carbon fiber sucker rod by the changeover portion that the centre gripping warp, stress concentration when avoiding carbon fiber sucker rod centre gripping.
The clamping sleeve 6 and the centering sleeve 1 are made of stainless steel, so that the service life is prolonged.
Claims (4)
1. The utility model provides a sucker rod centralizer, includes centre gripping cover (6) and righting cover (1), its characterized in that: the clamping sleeve (6) and the centering sleeve (1) are both of a semi-cylinder structure and are connected into a cylinder sleeve through bolts, a section of stepped shaft (9) with a reduced diameter is arranged on the outer circular surface of the clamping sleeve (6), a section of stepped hole (13) with a reduced diameter is arranged in the inner hole of the centering sleeve (1), the stepped hole (13) of the centering sleeve (1) is in clearance fit connection with the stepped shaft (9) of the clamping sleeve (6) in the length direction, the outer circle of the clamping sleeve (6) is in clearance fit connection with the inner hole of the centering sleeve (1), a cavity (3) is formed between the outer circular surface of the stepped shaft (9) and the inner hole of the stepped hole (13), and lubricating oil is filled in the cavity (3);
the clamping sleeve (6) and the centering sleeve (1) are in clearance fit connection on the surface, the upper side and the lower side of the stepped hole (13) are respectively provided with three annular holes (11) in the inner hole of the centering sleeve (1), the outer circular surface of the clamping sleeve (6) corresponding to each annular hole (11) is provided with an annular groove (12), a nylon ring (4) is arranged in a space formed by each annular groove (12) and each annular hole (11), and the nylon ring (4) is in clearance fit connection with the annular holes (11) and the annular grooves (12);
the nylon ring (4) is a half ring and an integral ring, and the joint surface of the two half rings is a bevel surface (10);
the size of a central hole (8) of the clamping sleeve (6) is in interference fit with the excircle of the carbon fiber sucker rod.
2. The sucker rod centralizer of claim 1, wherein: the outer circle surface of the centering sleeve (1) is provided with evenly distributed overflowing grooves (2), and two cylindrical end surfaces of the centering sleeve (1) are provided with guide cones (5).
3. The sucker rod centralizer of claim 1, wherein: transition taper holes (7) with enlarged diameters are arranged at two ends of a central hole (8) of the clamping sleeve (6).
4. The sucker rod centralizer of claim 1, wherein: the clamping sleeve (6) and the centralizing sleeve (1) are both made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020737391.6U CN212201937U (en) | 2020-05-08 | 2020-05-08 | Sucker rod centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020737391.6U CN212201937U (en) | 2020-05-08 | 2020-05-08 | Sucker rod centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212201937U true CN212201937U (en) | 2020-12-22 |
Family
ID=73831149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020737391.6U Active CN212201937U (en) | 2020-05-08 | 2020-05-08 | Sucker rod centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212201937U (en) |
-
2020
- 2020-05-08 CN CN202020737391.6U patent/CN212201937U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |