CN210460536U

CN210460536U - Casting type sucker rod centralizer

Info

Publication number: CN210460536U
Application number: CN201920477830.1U
Authority: CN
Inventors: 李晓明
Original assignee: Qiqihar Yasheng Machinery Manufacturing Co ltd
Current assignee: Qiqihar Yasheng Machinery Manufacturing Co ltd
Priority date: 2019-04-10
Filing date: 2019-04-10
Publication date: 2020-05-05
Anticipated expiration: 2029-04-10

Abstract

The utility model discloses a casting formula sucker rod centralizer, including the centralizer body, the both ends of centralizer body all are connected with the centralizer end, the surface of centralizer end is the arc, the end-to-end connection of centralizer end has threaded connection head, threaded connection head's surface is equipped with connecting thread, the centralizer body is along radially being provided with four wear-resisting pieces of bar, four the wear-resisting piece of bar is central symmetric distribution, and four the water conservancy diversion channel, adjacent two have all been seted up to the top surface of the wear-resisting piece of bar constitute former well liquid runner between the wear-resisting piece of bar. The utility model discloses a set up the wear-resisting piece of bar and set up the water conservancy diversion channel on the wear-resisting piece surface of bar, can prolong the effective time of oil well eccentric wear cycle and increase centralizer life to the corruption phenomenon of former well fluid column to centralizer end body of rod sucker rod has been alleviated.

Description

Casting type sucker rod centralizer

Technical Field

The utility model relates to an oil development apparatus technical field, in particular to casting formula sucker rod centralizer.

Background

There are many kinds of sucker rod centralizers matched with sucker rod of sucker well in petroleum industry. Common sucker rod nylon clamp centralizer, its fixed knot constructs and inserts each other through two piece upper and lower nylon pieces and close interference locking on the sucker rod, and the weak point of this type of product is: 1. the axial locking force can not meet the requirement of an industrial standard SY/T5832-2009 sucker rod centralizer of more than or equal to 6 KN; 2. due to the restriction of the structure of the clamp centralizer, the flow area of an oil pipe cannot meet the requirements of an industry standard SY/T5832-2009 sucker rod centralizer): the flow area of the oil pipe is more than or equal to 1100mm 2; 3. because the end surfaces at two ends are planes due to the locking structure of the nylon hoop centralizer, when the sucker rod reciprocates up and down, the original well fluid (namely the oil-water mixed liquid pumped out from the underground) at two ends of the centralizer generates corresponding vortex and choked flow, the sucker rod at two ends of the centralizer is seriously corroded, and the sucker rod is frequently broken in the using process; the patent application number 200920095703.1 discloses a clamp type centralizer, which comprises a centralizer body, wherein the outer surface of the centralizer body is longitudinally provided with positioning support ribs and oil passing grooves, and the centralizer is characterized in that the centralizer body is date-pit-shaped, and two ends of the centralizer body are provided with flow guide angles with angles of 60-68 degrees. The utility model discloses an adopt two piece upper and lower centralizer to constitute a set ofly, two centralizers of every group are 90 to fix on the sucker rod. The two centralizers are arranged at a 90-degree corner, so that the effect of diversion on original well liquid in a tubular column cannot be realized in practical use, and the main reason is that a diversion groove formed by the two centralizers is narrow and the liquid flow is blocked; the utility model discloses a water conservancy diversion angle that centralizer body both ends set up still remains the plane on its terminal surface, and the discovery liquid column is still very big to the impact load of centralizer terminal surface in the in-service use, can't alleviate or eliminate the corruption of former well liquid column to the centralizer end sucker rod body of rod, can not play good guard action to the sucker rod.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a casting formula sucker rod centralizer can effectively solve the problem in the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a casting formula sucker rod centralizer, includes the centralizer body, the both ends of centralizer body all are connected with the centralizer end, the surface of centralizer end is the arc, the end-to-end connection of centralizer end has threaded connection head, threaded connection head's surface is equipped with connecting thread, the centralizer body is along radially being provided with four wear-resisting pieces of bar, four the wear-resisting piece of bar is central symmetric distribution, and four the water conservancy diversion channel way, adjacent two have all been seted up to the top surface of the wear-resisting piece of bar constitute former well liquid runner between the wear-resisting piece of bar.

Preferably, the included angle between two adjacent strip-shaped wear-resistant blocks is 90 degrees.

Preferably, the top surface of the strip-shaped wear-resistant block is a circular arc surface.

Preferably, the strip-shaped wear-resisting block is integrally connected with the centralizer body.

Preferably, the thicker end of the end head of the centralizer is connected with the centralizer body, and the thinner end of the end head of the centralizer is connected with the threaded connector.

Preferably, a gap is reserved between the strip-shaped wear-resistant block and the inner wall of the oil pumping pipe.

Compared with the prior art, the utility model discloses following beneficial effect has: this casting formula sucker rod centralizer, through the wear-resisting piece of four bars that set up on centralizer body surface, can bear the radial load of oil pipe inner wall jointly, the friction surface that wear-resisting piece circular arc surface of bar and oil pipe inner wall contact formed, its circular arc area is big, the contact surface atress is even, therefore the pressure that bears is less, can prolong the effective time of oil well eccentric wear cycle and increase centralizer life, the centralizer friction scar of oil pipe inner wall can not appear in the circular arc surface contact, through having seted up the water conservancy diversion channel at the top surface of wear-resisting piece of bar, make the flowing resistance of former well liquid reduce, choked flow and the vortex that the centralizer produced in the up-and-down reciprocating motion process have been weakened, and the corruption phenomenon of former well liquid column to centralizer end body of rod sucker rod has been alleviated.

Drawings

Fig. 1 is the overall structure schematic diagram of the casting type sucker rod centralizer of the utility model.

Fig. 2 is a cross-sectional view of the casting type sucker rod centralizer of the present invention.

Fig. 3 is a cross-sectional view of the casting type sucker rod centralizer during operation.

In the figure: 1. a centralizer body; 2. a centralizer tip; 3. a threaded connector; 4. connecting threads; 5. a strip-shaped wear-resistant block; 6. a diversion channel; 7. a raw well fluid flow channel.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1-3, a casting formula sucker rod centralizer, including centralizer body 1, centralizer body 1's both ends all are connected with centralizer end 2, the surface of centralizer end 2 is the arc, the end-to-end connection of centralizer end 2 has threaded connection head 3, threaded connection head 3's surface is equipped with connecting thread 4, centralizer body 1 radially is provided with four wear-resisting pieces of bar 5, four wear-resisting pieces of bar 5 are central symmetry and distribute, and four the water conservancy diversion channel 6 has all been seted up on the top surface of wear-resisting piece of bar 5, adjacent two constitute former well liquid runner 7 between the wear-resisting piece of bar 5.

In this embodiment, preferably, an included angle between two adjacent strip-shaped wear-resistant blocks 5 is 90 degrees.

In this embodiment, preferably, the top surface of the strip-shaped wear-resistant block 5 is a circular arc surface.

In this embodiment, preferably, the strip-shaped wear-resistant block 5 is integrally connected with the centralizer body 1.

In this embodiment, preferably, the thicker end of the centralizer end head 2 is connected with the centralizer body 1, and the thinner end of the centralizer end head 2 is connected with the threaded connector 3.

In this embodiment, preferably, a gap is left between the strip-shaped wear-resistant block 5 and the inner wall of the oil well pipe.

It is noted that the utility model relates to a casting type sucker rod centralizer, when in use, through four strip-shaped wear-resisting blocks 5 arranged on the surface of the centralizer body 1, can bear the radial load of the inner wall of the oil pumping pipe together, the circular arc outer surface of the strip-shaped wear-resistant block 5 is contacted with the inner wall of the oil pumping pipe to form a friction surface, the arc area is large, the stress on the contact surface is uniform, so the pressure born by the arc area is small, the effective time of the eccentric wear period of the oil well can be prolonged, the service life of the centralizer is prolonged, the friction scratch of the centralizer on the inner wall of the oil pumping pipe can not occur when the arc surface is in contact, the top surface of the strip-shaped wear-resistant block 5 is provided with the flow guide channel 6, so that the flow resistance of the original well fluid is reduced, the choked flow and the vortex generated in the up-and-down reciprocating motion process of the centralizer body 1 are weakened, and the corrosion phenomenon of the original well fluid column to the sucker rod at the end rod body of the centralizer is relieved.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a casting formula sucker rod centralizer, includes centralizer body (1), its characterized in that: the both ends of centralizer body (1) all are connected with centralizer end (2), the surface of centralizer end (2) is the arc, the end-to-end connection of centralizer end (2) has threaded connection head (3), the surface of threaded connection head (3) is equipped with connecting thread (4), centralizer body (1) radially is provided with four wear-resisting pieces of bar (5), four wear-resisting piece of bar (5) are central symmetric distribution, and four water conservancy diversion channel (6), adjacent two have all been seted up on the top surface of wear-resisting piece of bar (5) constitute former well liquid runner (7) between wear-resisting piece of bar (5).

2. The cast sucker rod centralizer of claim 1, wherein: the included angle between two adjacent strip-shaped wear-resistant blocks (5) is 90 degrees.

3. The cast sucker rod centralizer of claim 1, wherein: the top surface of the strip-shaped wear-resistant block (5) is a circular arc surface.

4. The cast sucker rod centralizer of claim 1, wherein: the strip-shaped wear-resistant block (5) and the centralizer body (1) are integrally connected and formed.

5. The cast sucker rod centralizer of claim 1, wherein: the thicker end of the centralizer end head (2) is connected with the centralizer body (1), and the thinner end of the centralizer end head (2) is connected with the threaded connector (3).

6. The cast sucker rod centralizer of claim 1, wherein: and a gap is reserved between the strip-shaped wear-resistant block (5) and the inner wall of the oil pumping pipe.