CN216517868U - Stable pump sucker rod with supporting type centralizer - Google Patents
Stable pump sucker rod with supporting type centralizer Download PDFInfo
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- CN216517868U CN216517868U CN202123431644.0U CN202123431644U CN216517868U CN 216517868 U CN216517868 U CN 216517868U CN 202123431644 U CN202123431644 U CN 202123431644U CN 216517868 U CN216517868 U CN 216517868U
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- centralizer
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- sucker rod
- area support
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Abstract
The utility model relates to a stable pump sucker rod with a supporting type centralizer, which belongs to the technical field of oil fields and comprises a rod body, wherein the centralizer is arranged on the rod body and comprises a centralizer base body sleeved outside the rod body, a plurality of strip-shaped grooves are formed in the centralizer base body, a centralizing block is arranged in each strip-shaped groove, a plurality of accommodating holes are formed in the lower end of each centralizing block, and springs are arranged in the accommodating holes. The utility model improves the working mode of external friction of the conventional sucker rod centralizer into the working mode of internal friction of the supporting centralizer. The supporting type centralizer has the advantages of less abrasion of the centralizing block during working, good centralizing effect and long service life.
Description
Technical Field
The utility model relates to a stable pump sucker rod with a supporting centralizer, belonging to the technical field of oil fields.
Background
In the down process of the sucker rod string, the down resistance of the oil well pump enables the stress of the rod string to be below a neutral point, the rod string above the plunger of the oil well pump bears the compressive stress, and each friction resistance is greater than the critical bending pressure of the rod string to enable the rod string to be bent, particularly the sucker rod connected with the plunger of the oil well pump, so that eccentric wear of the sucker rod and an oil pipe is easy to occur, the threaded connection of the pump plunger and the sucker rod is loosened under the alternate action of pulling stress and compressive stress, and finally the sucker rod and the plunger are disengaged. Meanwhile, because the sucker rod at the bottom close to the plunger of the oil well pump runs unstably, the abrasion between the plunger of the oil well pump and the pump cylinder can be directly increased, the normal working state of the oil well pump is damaged, and oil extraction leakage, pump clamping and even failure of the oil well pump are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects in the prior art and provides a stable pump sucker rod with a supporting centralizer, which has better centralizing effect and longer service life.
The utility model is realized by the following technical scheme:
the stable pump sucker rod comprises a rod body, wherein a centralizer is arranged on the rod body, the centralizer comprises a centralizer base body sleeved outside the rod body, a plurality of strip-shaped grooves are formed in the centralizer base body, a centralizing block is arranged in each strip-shaped groove, a plurality of containing holes are formed in the lower end of each centralizing block, and a spring is arranged in each containing hole.
The utility model improves the working mode of the external friction of the conventional sucker rod centralizer into the working mode of the internal friction of the supporting centralizer. When the supporting type centralizer works, the abrasion of the centralizing block is smaller, the centralizing effect is good, and the service life is long.
The utility model is further improved in that two ends of the centering block are provided with limiting lugs, two ends of the centralizer base body are provided with second threaded connecting parts, locking caps are mounted on the second threaded connecting parts, and the same ends of all the centering blocks are located inside the locking caps. The locking cap is adopted to limit the centering block, so that the stability of the centering block can be ensured when the centering device works.
The utility model further improves that the sucker rod is positioned in the oil pipe when in use, and the outer diameter of the centralizer is larger than the inner diameter of the oil pipe when the centralizer is in a free state. The design can ensure that the centralizer is tightly attached to the inner wall in the oil pipe at any time.
In addition, the utility model is further improved, and the centralizing block is made of wear-resistant materials. When the oil pipe centering device works, friction often occurs between the centering block and the inner wall of the oil pipe, and the service life of the centering block can be prolonged by adopting a wear-resistant material.
The utility model further improves that the surface of the inner cavity of the centralizer matrix is polished, and the surface of the rod body is processed by tungsten alloy diffusion coating. Frequent friction before centralizer base member inner chamber and the body of rod surface, frictional force can be reduced to this kind of design, and can prolong the life of centralizer and the body of rod.
In a further development of the utility model, the rod body is connected to the plunger of the oil pump via a threaded connection arranged at its end.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model improves the working mode of the external friction of the conventional sucker rod centralizer into the working mode of the internal friction of the supporting centralizer. When the supporting type centralizer works, the abrasion of the centralizing block is smaller, the centralizing effect is good, and the service life is long.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a partial structural view of an embodiment of the present invention (omitting a centering block and a locking cap).
FIG. 3 is a schematic structural view of a centralizer base according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a centering block according to an embodiment of the present invention.
In the figure: 1. a rod body; 2. a first threaded connection part; 3. a coupling; 4. a centralizer base; 5. a righting block; 6. a locking cap; 7. a spring; 8. a second threaded connection part; 9. a strip-shaped groove; 10. an accommodation hole; 11. and a limiting bump.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The pump stabilizing sucker rod with the supporting centralizer shown in fig. 1 to 4 comprises a rod body 1, wherein the rod body 1 is connected with a plunger of an oil pump through a threaded connection part I2 arranged at the end part of the rod body 1, a coupling 3 is arranged at the other end of the rod body 1, the coupling 3 is used for connecting the rod bodies 1, the centralizer is arranged on the rod body 1 and comprises a centralizer base body 4 sleeved outside the rod body 1, a plurality of strip-shaped grooves 9 are arranged on the centralizer base body 4, a centralizing block 5 is arranged in each strip-shaped groove 9, a plurality of accommodating holes 10 are formed in the lower end of each centralizing block 5, and springs 7 are arranged in the accommodating holes 10;
the sucker rod is located the oil pipe when using, and the external diameter of centralizer is greater than the internal diameter of oil pipe under the free state.
Wherein, the both ends of righting piece 5 are equipped with spacing lug 11, and the both ends of centralizer base member 4 are equipped with two 8 of threaded connection portion, install locking cap 6 on two 8 of threaded connection portion, and all righting piece 5 are all located the inside of locking cap 6 with one end, and locking cap 6 plays limiting displacement to righting piece 5.
Wherein, the centralizer 5 is made of wear-resistant materials, the surface of the inner cavity of the centralizer basal body 4 is polished, and the surface of the rod body 1 is processed by tungsten alloy diffusion coating.
The working principle is as follows:
the centralizer cover is outside the pole body, and the pole body is installed to in the oil pipe together with the centralizer, under the spring action, makes the piece of righting paste tightly on the inner wall of oil pipe, and the piece of righting firmly supports the fixed position at the oil pipe inner wall during the assurance oil recovery, and the centralizer is unmovable, irrotational, and the oil pipe is arranged in to the steady pump sucker rod under the centralizer effect, forms even sliding friction with the centralizer base member inner chamber. The centralizer and the sucker rod body are combined to move up and down, the sucker rod string is protected by abrasion of the centralizer, the centralizer is ensured not to move with an oil pipe, a friction pair with a low friction coefficient formed by the sucker rod and an inner cavity of the centralizer is used as a sliding friction pair, so that abrasion of the centralizer caused by the fact that the centralizer moves up and down along with the sucker rod string is avoided, due to the centralizing effect of the centralizer, the bending resistance of the bottom sucker rod string in the operation process is improved, the deflection amplitude is small, the eccentric wear effect of the sucker rod string at the bottom of the sucker rod string can be effectively reduced, and the operation of a plunger of the sucker rod pump is more stable.
The stabilizing pump (anti-destabilization) sucker rod is designed into a short-joint type, and the shoulder structure of the stabilizing pump is utilized to limit the supporting type centralizer. The stable pump sucker rod is arranged above the plunger of the oil well pump, and the stable pump sucker rod has short rod body, thick diameter, high bearing capacity, good bending resistance and smooth surface and good corrosion and wear resistance and is favorable for stable operation of the bottom sucker rod string.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The terms "upper", "lower", "outside", "inside" and the like in the description and claims of the present invention and the above drawings are used for distinguishing relative positions if any, and are not necessarily given qualitatively. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. The utility model provides a steady pump sucker rod of area support formula centralizer, includes the body of rod (1), is equipped with centralizer, its characterized in that on the body of rod (1): the centralizer is equipped with a plurality of bar groove (9) including establishing centralizer base member (4) outside the body of rod (1) at centralizer base member (4), all is equipped with one in every bar groove (9) and rights piece (5), rights piece (5) lower extreme and has seted up a plurality of accommodation hole (10), is equipped with spring (7) in accommodation hole (10).
2. The stable pump sucker rod of area support formula centralizer of claim 1 which characterized in that: the two ends of the centering block (5) are provided with limiting convex blocks (11), the two ends of the centering device base body (4) are provided with two threaded connecting portions (8), the two threaded connecting portions (8) are provided with locking caps (6), and the same ends of all the centering blocks (5) are located inside the locking caps (6).
3. The stable pump sucker rod of area support formula centralizer of claim 1 or 2 characterized in that: the sucker rod is located the oil pipe when using, centralizer is under free state, and the external diameter of centralizer is greater than the internal diameter of oil pipe.
4. The stable pump sucker rod of area support formula centralizer of claim 3 which characterized in that: the centralizing block (5) is made of wear-resistant materials.
5. The stable pump sucker rod of area support formula centralizer of claim 3, its characterized in that: the surface of the inner cavity of the centralizer base body (4) is polished, and the surface of the rod body (1) is processed by tungsten alloy diffusion coating.
6. The stable pump sucker rod of area support formula centralizer of claim 1 which characterized in that: the rod body (1) is connected with a plunger of the oil well pump through a first threaded connection part (2) arranged at the end part of the rod body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123431644.0U CN216517868U (en) | 2021-12-30 | 2021-12-30 | Stable pump sucker rod with supporting type centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123431644.0U CN216517868U (en) | 2021-12-30 | 2021-12-30 | Stable pump sucker rod with supporting type centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216517868U true CN216517868U (en) | 2022-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123431644.0U Active CN216517868U (en) | 2021-12-30 | 2021-12-30 | Stable pump sucker rod with supporting type centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216517868U (en) |
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2021
- 2021-12-30 CN CN202123431644.0U patent/CN216517868U/en active Active
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