CN210948532U - Tooth-shaped sucker rod centralizer - Google Patents
Tooth-shaped sucker rod centralizer Download PDFInfo
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- CN210948532U CN210948532U CN201921592154.9U CN201921592154U CN210948532U CN 210948532 U CN210948532 U CN 210948532U CN 201921592154 U CN201921592154 U CN 201921592154U CN 210948532 U CN210948532 U CN 210948532U
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Abstract
The utility model discloses a flute profile sucker rod centralizer, including cylindrical base member, evenly be provided with four at least lug an along the circumference on the side upper portion of base member, evenly be provided with four at least lug b along the circumference of the side lower part of base member, lug an and lug b set up relatively, evenly be provided with four at least lug c along the circumference at the side middle part of base member, lug c is located between lug an and the lug b, and sets up with lug an and lug b interval respectively, is provided with the sucker rod hole along its axial in the base member. The centralizer of the utility model solves the problems that the prior centralizer can not realize full circumferential anti-abrasion and full circumferential wax scraping; the wear and tear is fast, the short-lived problem; the pump detection period is prolonged, the oil extraction efficiency is improved, more energy is saved, and the oil extraction cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of oil field mechanical equipment, concretely relates to flute profile sucker rod centralizer.
Background
The sucker rod centralizer is an eccentric wear-resistant and wax scraping-resistant downhole tool used in oil extraction on land. The sucker rod is required to be in an up-stroke and down-stroke oil extraction process in the oil pipe, the sucker rod is inevitably contacted and rubbed with the inner wall of the oil pipe and is subjected to alternating load and torque load, so that the sucker rod and the inner wall of the oil pipe are easily seriously abraded, the sucker rod is broken, the oil pipe is perforated, and the like, and the service life of the sucker rod and the oil pipe in the underground is sharply shortened. When the sucker rod is broken or the oil pipe is perforated, the oil extraction operation is forced to stop, and the oil extraction operation is restarted only after the well is repaired (the broken rod is salvaged, the new sucker rod and the new oil pipe are replaced). Thus, the oil extraction efficiency is low, the cost is high, and the resource waste is serious.
At present, the oil extraction operation mainly adopts a straight type or spiral type centralizer. Although the two centralizers slow down the friction between the sucker rod and the inner wall of the oil pipe to a certain extent, the following problems still exist: (1) the straight centralizer cannot be in contact with the inner wall of the oil pipe in the full circumferential direction (360 degrees), and two groups of groove surfaces are in contact with the inner wall of the oil pipe, so that the contact groove surfaces are easy to stress unevenly, wear and consume quickly, the service life is short, and eccentric wear grooves are easy to be left in the inner wall of the oil pipe, so that the oil pipe is easy to perforate due to thick and thin wear of the wall of the oil pipe; the straight centralizer has a wax scraping effect only by two groups of groove surfaces contacted with the inner wall of the oil pipe, and the wax scraping effect is poor; (2) the spiral centralizer is of a spiral structure, so that a sucker rod string is easy to generate rotary torque in the process of reciprocating oil pumping up and down, the rotary torque often causes the phenomenon that the sucker rod string is tripped, and meanwhile, the rotary torque is loaded on the sucker rod string, so that the service life of the sucker rod is further shortened; the wax after the scraping of the spiral centralizer is easy to accumulate in the spiral channel and can not be discharged along with crude oil in time, thus being easy to cause pollution.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a tooth-shaped sucker rod centralizer, which solves the problems that the prior centralizer can not realize full circumferential abrasion resistance and full circumferential wax scraping; fast wear and tear and short service life.
The utility model discloses the technical scheme who adopts is a flute profile sucker rod centralizer, including cylindrical base member, evenly be provided with four at least lug an along the circumference on the side upper portion of base member, evenly be provided with four at least lug b along the circumference of the side lower part of base member, lug an and lug b set up relatively, evenly be provided with four at least lug c along the circumference at the side middle part of base member, lug c is located between lug an and the lug b, and sets up with lug an and lug b interval respectively, is provided with the sucker rod hole along its axial in the base member.
The utility model discloses a characteristics still lie in:
the structure of the convex block a is the same as that of the convex block b, and gaps are arranged between every two of the convex block a, the convex block b and the convex block c.
The cross section of the lug a is irregular rectangle, one side of the cross section is semicircular, an arc-shaped surface is arranged at one end of the lug a connected with the end part of the base body, the arc-shaped surface is arranged along the axial direction of the base body, and one end of the lug a close to the lug b is in a round angle shape;
the cross section of the lug b is irregular rectangle, one side of the cross section is semicircular, an arc-shaped surface is arranged at one end, connected with the end part of the base body, of the lug b, the arc-shaped surface is arranged along the axial direction of the base body, and one end, close to the lug a, of the lug b is in a round angle shape.
The maximum excircle of the convex block a body is the same as the maximum excircle of the convex block b body.
The cross section of the convex block c is oval, and the maximum excircle of the convex block a body is the same as that of the convex block c body.
At least four diversion trenches are arranged between the convex blocks a, and at least four diversion trenches are arranged between the convex blocks b.
The axial included angle between each lug c and the lug a adjacent to the lug c is 45 degrees; the axial included angle between each lug c and the lug b adjacent to the lug c is 45 degrees.
The utility model has the advantages that:
compared with the existing centralizer, the centralizer of the utility model realizes the functions of full circumferential (360 degrees) abrasion resistance and full circumferential wax scraping; the centralizer of the utility model solves the problems of the rotation torque generated by the spiral centralizer and the tripping of the sucker rod string caused by the rotation torque; the utility model discloses a centralizer makes the life of going into the well of body and sucker rod string increase, has also prolonged and has examined pump cycle, has promoted oil recovery efficiency, and more energy-conservation has reduced the oil recovery cost.
Drawings
FIG. 1 is a schematic structural view of a tooth-shaped sucker rod centralizer of the present invention;
FIG. 2 is a top view of the tooth-shaped sucker rod centralizer of the present invention;
fig. 3 is an assembly diagram of the tooth-shaped sucker rod centralizer and the sucker rod of the present invention.
In the figure, 1 is a bump a, 2 is a bump b, 3 is a sucker rod hole, 4 is a base body, and 5 is a bump c.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model relates to a flute profile sucker rod centralizer, the structure is as shown in figure 1, fig. 2, including cylindrical base member 4, circumference along the side upper portion of base member 4 evenly is provided with four at least lugs a1, circumference along the side lower part of base member 4 evenly is provided with four at least lugs b2, lug a1 sets up with lug b2 relatively, circumference along the side middle part of base member 4 evenly is provided with four at least lugs c5, lug c5 is located between lug a1 and the lug b2, and set up with lug a1 and lug b2 interval respectively, be provided with sucker rod hole 3 along its axial in the base member 4.
Preferably, the bump a1 has the same structure as the bump b2, and a gap is arranged between each of the bump a1, the bump b2 and the bump c 5; the centering device is mainly used for centering and scraping wax, and eliminating the rotating torque generated by the centering device and the tripping phenomenon of a sucker rod string caused by the rotating torque; the cross section of the bump a1 is irregular rectangle, one side of the cross section is semicircular, one end of the bump a1 connected with the end of the base 4 is provided with an arc-shaped surface, the arc-shaped surface is arranged along the axial direction of the base 4, and one end of the bump a1 close to the bump b2 is in a round angle shape;
the cross section of the bump b2 is irregular rectangle, one side of the cross section is semicircular, an arc-shaped surface is arranged at one end of the bump b2 connected with the end part of the base 4, the arc-shaped surface is arranged along the axial direction of the base 4, and one end of the bump b2 close to the bump a1 is in a round angle shape.
The maximum excircle of the convex block a1 body is the same as the maximum excircle of the convex block b2 body; at least four diversion trenches are arranged between the bumps a1, and at least four diversion trenches are arranged between the bumps b 2; the cross section of the bump c5 is oval, and the maximum excircle of the bump a1 body is the same as the maximum excircle of the bump c5 body; the axial included angle between each lug c5 and the lug a1 adjacent to the lug c5 is 45 degrees; the axial included angle between each projection c5 and its adjacent projection b2 is 45 °.
The utility model relates to a preferred structure of flute profile sucker rod centralizer does:
the cylindrical substrate comprises a cylindrical substrate 4, four bumps a1 are uniformly arranged along the circumferential direction of the upper part of the side surface of the substrate 4, four bumps b2 are uniformly arranged along the circumferential direction of the lower part of the side surface of the substrate 4, the bumps a1 and the bumps b2 are oppositely arranged, the structure is the same, four bumps c5 are uniformly arranged along the circumferential direction of the middle part of the side surface of the substrate 4, and the bumps c5 are positioned between the bumps a1 and the bumps b2 and are respectively arranged at intervals with the bumps a1 and the bumps b 2; gaps are arranged between every two of the bump a1, the bump b2 and the bump c 5;
the cross section of the bump a1 is irregular rectangle, one side of the cross section is semicircular, one end of the bump a1 connected with the end of the base 4 is provided with an arc-shaped surface, the arc-shaped surface is arranged along the axial direction of the base 4, and one end of the bump a1 close to the bump b2 is in a round angle shape; the cross section of the bump b2 is irregular rectangle, one side of the cross section is semicircular, one end of the bump b2 connected with the end of the base 4 is provided with an arc-shaped surface, the arc-shaped surface is arranged along the axial direction of the base 4, and one end of the bump b2 close to the bump a1 is in a round angle shape; the maximum excircle of the convex block a1 body is the same as the maximum excircle of the convex block b2 body; the cross section of the bump c5 is oval, and the maximum excircle of the bump a1 body is the same as the maximum excircle of the bump c5 body; four diversion trenches are arranged between the bumps a1, and four diversion trenches are arranged between the bumps b 2; the axial included angle between each lug c5 and the lug a1 adjacent to the lug c5 is 45 degrees; the axial included angle between each lug c5 and the lug b2 adjacent to the lug c5 is 45 degrees;
a sucker rod hole 3 is arranged in the base body 4 along the axial direction of the base body, and a sucker rod is arranged in the sucker rod hole 3; the diameter of the sucker rod suitable for the centralizer of the utility model is phi 16mm, phi 19mm and phi 22 mm;
wherein the diameter of the substrate 4 is phi 40 mm; the maximum outer circle diameters of the convex block a1 and the convex block b2 are phi 58 +/-0.4 mm; the minimum spacing between tab a1 and tab b2 is 50 mm; the fillet radius of the bump a1 and the bump b2 is 10 mm; the width of the bump a1 and the width of the bump b2 are both 20 +/-0.4 mm; the length of the centralizer of the utility model is 110 mm; the length of the bump c5 is 30 mm.
The utility model relates to a flute profile sucker rod centralizer, the working process as follows:
the centralizer is used as a downhole tool and is matched with the sucker rod for use; the sucker rod moves along with the up-and-down reciprocating motion of the sucker rod in the oil pipe.
As shown in figure 3, the sucker rod is placed in the sucker rod hole 3 of the centralizer of the utility model, in the moving process, because the sucker rod column is subjected to alternating load, the centralizer and the inner wall of the oil pipe generate contact friction, so as to avoid the direct contact of the sucker rod and the inner wall of the oil pipe, and play a role in preventing abrasion; the lug a1, the lug b2 and the lug c5 of the centralizer realize the full circumferential contact with the inner wall of the oil pipe, so that the anti-abrasion effect is more outstanding; along with the up-down stroke oil extraction motion of sucker rod string, the utility model discloses the fillet face of lug a1, lug b2 and lug c5 of centralizer will strike off the wax of adhering to at the oil pipe inner wall totally, and strike off the in-process of the adnexed wax of oil pipe inner wall, play the effect of a buffering beam-pumping unit load.
The utility model discloses the profile of tooth of longitudinal symmetry and dislocation type is adopted to the structure of centralizer, for the centralizer of ordinary screw-tupe, has eliminated the rotatory moment of torsion that the centralizer produced and the sucker rod post dropout phenomenon that this rotatory moment of torsion caused.
The utility model relates to a flute profile sucker rod centralizer, its advantage lies in:
(1) the centralizer of the utility model not only can contact with the inner wall of the oil pipe in the whole circumferential direction, but also can play the roles of whole circumferential anti-abrasion and better wax scraping, thereby improving the service life of the pipe and the sucker rod, prolonging the pump checking period and avoiding the perforation phenomenon of the oil pipe;
(2) compared with a spiral centralizer, the contact area of the centralizer and an oil pipe is reduced, so that the friction resistance is reduced, and the resistance generated by interception in descending is reduced;
(3) compared with a spiral centralizer, the centralizer of the utility model greatly reduces the rotating torque and avoids the tripping problem of the sucker rod column in the up-and-down reciprocating motion;
(4) the utility model discloses the area of flowing through of centralizer is big, and the eccentric wear resistance of going down and liquid flow resistance are little to the phenomenon of damming has been reduced.
Claims (7)
1. The utility model provides a flute profile sucker rod centralizer, its characterized in that includes cylindrical base member (4), follows the circumference on the side upper portion of base member (4) evenly is provided with four at least lugs a (1), follows the circumference of the side lower part of base member (4) evenly is provided with four at least lugs b (2), lug a (1) and lug b (2) set up relatively, follow the circumference in the side middle part of base member (4) evenly is provided with four at least lugs c (5), lug c (5) are located between lug a (1) and lug b (2), and set up with lug a (1) and lug b (2) interval respectively, be provided with sucker rod hole (3) along its axial in base member (4).
2. The centralizer of claim 1, wherein the projections a (1) and b (2) have the same structure, and a gap is provided between each projection a (1), the projection b (2) and the projection c (5).
3. The toothed sucker rod centralizer of claim 2, wherein the cross section of the projection a (1) is irregular rectangle, one side of the cross section is semicircular, an arc-shaped surface is arranged at the end of the projection a (1) connected with the end of the base body (4), the arc-shaped surface is arranged along the axial direction of the base body (4), and the end of the projection a (1) close to the projection b (2) is in a round angle shape;
the cross section of the convex block b (2) is irregular rectangle, one side of the cross section is semicircular, one end, connected with the end part of the base body (4), of the convex block b (2) is provided with an arc-shaped surface, the arc-shaped surface is arranged along the axial direction of the base body (4), and one end, close to the convex block a (1), of the convex block b (2) is in a round angle shape.
4. The toothed sucker rod centralizer of claim 2, wherein the maximum outer circumference of the body of the projection a (1) is the same as the maximum outer circumference of the body of the projection b (2).
5. The toothed sucker rod centralizer of claim 4, wherein the cross section of the projection c (5) is elliptical, and the maximum outer circumference of the body of the projection a (1) is the same as the maximum outer circumference of the body of the projection c (5).
6. The tooth-type sucker rod centralizer of claim 1, wherein at least four flow guide grooves are arranged between the convex blocks a (1), and at least four flow guide grooves are arranged between the convex blocks b (2).
7. The tooth type sucker rod centralizer of claim 1, wherein the axial angle between each lug c (5) and the lug a (1) adjacent to the lug c is 45 degrees; the axial included angle between each lug c (5) and the lug b (2) adjacent to the lug c is 45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921592154.9U CN210948532U (en) | 2019-09-24 | 2019-09-24 | Tooth-shaped sucker rod centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921592154.9U CN210948532U (en) | 2019-09-24 | 2019-09-24 | Tooth-shaped sucker rod centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210948532U true CN210948532U (en) | 2020-07-07 |
Family
ID=71381764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921592154.9U Active CN210948532U (en) | 2019-09-24 | 2019-09-24 | Tooth-shaped sucker rod centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210948532U (en) |
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2019
- 2019-09-24 CN CN201921592154.9U patent/CN210948532U/en active Active
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