CN216617448U - Cladding type anticorrosion sucker rod - Google Patents

Abstract

The utility model discloses a coated anti-corrosion sucker rod which comprises a female joint, a rod body and a male joint which are sequentially connected, wherein the female joint and the male joint are made of stainless steel, the rod body is made of alloy steel, a female joint rod neck is arranged on the female joint, a male joint rod neck is arranged on the male joint, and coating layers are coated on the outer sides of the female joint, the rod body and the male joint which are positioned between the female joint rod neck and the male joint rod neck, are coated from the male joint rod neck to the female joint rod neck and cover the whole rod body, so that the complete isolation of the rod body and oil liquid is realized, and the complete corrosion prevention of the whole rod is realized.

Description

Cladding type anticorrosion sucker rod

Technical Field

The utility model belongs to the field of oil extraction systems in oil fields, is applied to the connection of an oil well pump and an oil pumping unit, and particularly relates to a coated anti-corrosion sucker rod.

Background

The water content in the well fluid continuously rises along with the development of the oil field in the middle and later stages, so that the mineralization degree of the well fluid and the content of corrosive media are gradually increased, in addition, some oil wells also contain a large amount of corrosive gases such as hydrogen sulfide, carbon dioxide and the like, the working environment of the sucker rod is more and more severe, the corrosion problem is more and more serious, the accident that the sucker rod is broken due to corrosion fatigue is continuously caused, the production period of the oil well is short, and the economic benefit of the oil field is reduced.

In order to solve the corrosion problem of the sucker rod, the oil field usually adopts the modes of a material type sucker rod, a surface spraying type sucker rod and the like, but the material type sucker rod has limited self corrosion resistance and higher cost, and the spraying process type sucker rod cannot well solve the problem that the sucker rod is corroded because the coating has poor adhesive force, is not wear-resistant, is easy to fall off and the like.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a coated anti-corrosion sucker rod which covers the whole rod body and realizes complete isolation of the rod body and oil liquid aiming at the defects in the prior art.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a cladding type anticorrosion sucker rod, is including the female joint, the body of rod and the male joint that connect gradually, be provided with the female joint hosel on the female joint, be provided with the male joint hosel on the male joint, follow the female joint hosel to the outside of female joint, the body of rod and male joint between the male joint hosel covers has the coating, and the coating covers to the male joint hosel part from the female joint hosel part, covers whole body of rod, has realized the complete isolation of the body of rod and fluid.

All install on female joint hosel and the male joint hosel and seal the cover, can make coating and the public female joint hosel in both ends combine closely, stopped fluid and got into the body of rod and the body of rod that leads to from coating one end port department corrodes, also avoids temperature variation simultaneously and arouses the coating to slide along the body of rod, makes the body of rod lose the protection, has prolonged the life of sucker rod.

The utility model discloses a sucker rod, including female joint, and female joint, female joint's both ends are female joint internal thread, and female joint mid portion is female joint rod neck, be equipped with female joint spanner side on the outside of the last one end of keeping away from the body of rod of female joint, can use when installing, changing or maintaining anticorrosive sucker rod, female joint rod neck and female joint spanner side place are equipped with female joint transition circular arc between the outside, and this transition circular arc is the same with ordinary sucker rod transition circular arc size, and elevator hook here avoids destroying the coating. Female joint transition circular cone is equipped with between female joint hosel and the other end female joint internal thread place outside, and this transition circular cone makes the transition between different rod footpaths mild, does benefit to the laminating of coating.

The two ends of the male joint are respectively provided with male joint internal threads and male joint external threads, the middle part of the male joint is a male joint rod neck, a male joint transition cone is arranged between the male joint rod neck and the outer side of the male joint internal threads, and the transition cones enable transition between different rod diameters to be smooth and are beneficial to attaching of a coating layer; a male joint transition circular arc and a male joint external thread shoulder are arranged between the male joint rod neck and the male joint external thread; the male joint wrench side is arranged on the male joint external thread shoulder and can be used for installing, replacing or maintaining the anticorrosion sucker rod.

The utility model discloses a pole body, including the pole body, the intermediate part of the pole body is the long shaft neck of pole body, the long shaft neck both ends of pole body are provided with body of rod external screw thread circular bead, be equipped with body of rod transition circular cone between the long shaft neck of pole body and body of rod external screw thread circular bead, this transition circular cone makes the transition between different rod footpaths mild, does benefit to the laminating of coating.

The female joint internal thread and the male joint internal thread are respectively connected with the rod body external threads arranged at the two ends of the rod body.

The female joint internal thread is matched with the male joint external thread, so that a plurality of coated anticorrosion sucker rods are sequentially connected into a sucker rod string.

Compared with the prior art, the utility model has the beneficial effects that: the coating covers the whole alloy steel rod body from the cladding of stainless steel male joint rod neck part to the cladding of stainless steel female joint rod neck part, has realized the body of rod and fluid and has kept apart completely, makes whole pole possess corrosion resisting property.

The coating both ends are sealed through sealing the cover, make the coating closely combine with public, female joint rod neck, stopped fluid from the coating one end port department and get into the body of rod and the body of rod that leads to corrodes, also avoid temperature variation simultaneously and arouse the coating to slide along the body of rod, make the body of rod lose the protection, prolonged the life of sucker rod.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the drawings: 1 is female joint, 1.1 is female joint internal thread, 1.2 is female joint spanner side, 1.3 is female joint transition circular arc, 1.4 is female joint stock neck, 1.5 is female joint transition circular cone, 2 is sealing cover, 3 is the coating, 4 is the body of rod, 4.1 is body of rod external screw thread, 4.2 is body of rod external screw thread circular bead, 4.3 is body of rod transition circular cone, 4.4 is body of rod stock neck, 5 is the male joint, 5.1 is the male joint internal thread, 5.2 is male joint transition circular cone, 5.3 is the male joint stock neck, 5.4 is male joint transition circular arc, 5.5 is male joint external screw thread circular bead, 5.6 is male joint spanner side, 5.7 is the male joint external screw thread.

Detailed Description

The present invention will be described in further detail with reference to specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

As shown in fig. 1, a cladding type anticorrosion sucker rod, including female joint 1, the body of rod 4 and the male joint 5 that connect gradually, be provided with female joint shaft neck 1.4 on the female joint 1, be provided with male joint shaft neck 5.3 on the male joint 5, the outside cladding that is located female joint 1 between female joint shaft neck 1.4 to the male joint shaft neck 5.3, the body of rod 4 and male joint 5 has coating 3, coating 3 covers whole body of rod 4 from the partial cladding of female joint shaft neck 1.4 to male joint shaft neck 5.3 part, has realized the complete isolation of the body of rod 4 with fluid.

The coated anti-corrosion sucker rod also comprises a sealing sleeve 2; seal the cover 2 and install female joint rod neck 1.4 and male joint rod footpath 5.3 are last, seal cover 2 and can cover and compress tightly sealed the end of coating 3 to paste closely with public, female joint rod neck, stopped fluid and got into the body of rod 4 and the body of rod 4 that leads to from 3 end port departments of coating 4 corrodes, also avoid temperature variation simultaneously and arouse that coating 3 slides along the body of rod 4, make the body of rod 4 lose the protection, prolonged the life of sucker rod.

In the above embodiment, both ends of the female joint 1 are female joint internal threads 1.1, the middle portion of the female joint 1 is a female joint rod neck 1.4, a female joint wrench square 1.2 is arranged on the outer side of one end of the female joint, which is far away from the rod body 4, a female joint transition arc 1.3 is arranged between the outer sides of the female joint rod neck 1.4 and the female joint wrench square 1.2, and a female joint transition cone 1.5 is arranged between the outer sides of the female joint rod neck 1.4 and the female joint internal threads 1.1 at the other end.

In the above embodiment, the both ends of male joint 5 are equipped with male joint internal thread 5.1 and male joint external screw thread 5.7 respectively, the intermediate portion of male joint 5 is male joint rod neck 5.3, be equipped with male joint transition circular cone 5.2 between the male joint rod neck 5.3 and the male joint internal thread 5.1 outside, male joint rod neck 5.3 with be equipped with male joint transition circular arc 5.4 and male joint external screw thread circular bead 5.5 between the male joint external screw thread 5.7, be equipped with male joint spanner side 5.6 on the male joint external screw thread circular bead 5.5, spanner side 5.6 can use when the sucker rod is installed, is changed or is maintained anticorrosive.

In the above embodiment, the middle portion of the rod body 4 is a rod body long rod neck 4.4, rod body external thread shoulders 4.2 are arranged at two ends of the rod body long rod neck 4.4, and a rod body transition cone 4.3 is arranged between the rod body long rod neck 4.4 and the rod body external thread shoulders 4.2.

In the above embodiment, the female joint internal thread 1.1 and the male joint internal thread 5.1 are respectively connected with the rod body external threads 4.1 arranged at two ends of the rod body 4.

In the above embodiment, the female joint internal thread 1.1 at the end of the female joint wrench 1.2 is matched with the male joint external thread 5.7 of the male joint 5, and when in use, a plurality of coated anticorrosion sucker rods are connected with the male joint external thread 5.7 through the female joint internal thread 1.1 to form a sucker rod string.

In the above embodiment, the female connector 1 and the male connector 5 are made of stainless steel, so that the female connector and the male connector have excellent corrosion resistance; the sealing sleeve 2 is made of engineering plastics, preferably reinforced nylon, and has excellent temperature resistance and friction resistance; the coating layer 3 is made of engineering plastics, preferably selected from ultra-high molecular weight polyethylene and has excellent corrosion resistance.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and adaptations can be made without departing from the principle of the present invention, and such modifications and adaptations should also be considered as the scope of the present invention.

Claims (6)

1. A coated anti-corrosion sucker rod is characterized by comprising a female joint (1), a rod body (4) and a male joint (5) which are sequentially connected, wherein the female joint (1) is provided with a female joint rod neck (1.4), female joint internal threads (1.1) are arranged at two ends of the female joint (1), the female joint rod neck (1.4) is arranged in the middle of the female joint (1), a female joint wrench square (1.2) is arranged at the outer side of one end, far away from the rod body (4), of the female joint (1), a female joint transition circular arc (1.3) is arranged at the part, between the female joint rod neck (1.4) and the female joint wrench square (1.2), of the female joint rod neck (1.4) and the outer side of the middle of the female joint internal threads (1.1) at one end, far away from the female joint square (1.2), of the female joint transition circular arc (1.5) are provided with female joint transition cones (1.5), and the male joint rod neck (5.3) is arranged on the male joint (5), all install on female joint pole neck (1.4) and male joint pole neck (5.3) and seal cover (2), be located female joint pole neck (1.4) extremely between male joint pole neck (5.3) the outside cladding of female joint (1), the body of rod (4) and male joint (5) has coating (3).

2. The coated anticorrosion sucker rod of claim 1, wherein the two ends of the male joint (5) are respectively provided with a male joint internal thread (5.1) and a male joint external thread (5.7), the middle part of the male joint (5) is a male joint rod neck (5.3), the outer sides of the middle parts of the male joint rod neck (5.3) and the male joint internal thread (5.1) are provided with a male joint transition taper cone (5.2), a male joint transition circular arc (5.4) and a male joint external thread shoulder (5.5) are arranged between the male joint rod neck (5.3) and the male joint external thread (5.7), and a male joint wrench square (5.6) is arranged on the male joint external thread shoulder (5.5).

3. The coated anticorrosion sucker rod of claim 1, wherein the middle part of the rod body (4) is a rod body long rod neck (4.4), rod body external thread shoulders (4.2) are arranged at two ends of the rod body long rod neck (4.4), and a rod body transition cone (4.3) is arranged between the rod body long rod neck (4.4) and the rod body external thread shoulders (4.2).

4. The coated anticorrosion sucker rod of claim 2, wherein the female joint internal thread (1.1) and the male joint internal thread (5.1) are respectively connected with the rod body external threads (4.1) arranged at the two ends of the rod body (4).

5. The coated anti-corrosion sucker rod of claim 2, wherein the female joint internal thread (1.1) is matched with the male joint external thread (5.7) of the male joint (5).

6. The coated anti-corrosion sucker rod of claim 1, wherein the sealing sleeve (2) is overlapped with the end of the coating layer (3).

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