CN215108777U - Repair cladding sucker rod - Google Patents

Abstract

A repair coated sucker rod, the coating layer is coated on the sucker rod body, the lower part of the joint is in threaded connection with the upper part of the sucker rod body, the outer wall of the locking sleeve is a conical surface, the upper end of the conical surface is small in diameter and the lower end of the conical surface is large in diameter, a convex ring is arranged at the inner lower part of the locking sleeve, a plurality of milled open grooves are arranged on the locking sleeve, the lower end of each open groove is opened, the inner diameter of the upper part of the locking sleeve is smaller than the diameter of a boss below the upper part of the sucker rod body, the locking sleeve is sleeved on the sucker rod body, the upper inner part of the locking sleeve is limited at the boss below the upper part of the sucker rod body, the lower part of the locking sleeve covers the upper part of the coating layer, a conical hole is arranged at the inner lower part of the joint, when the lower part of the joint is in threaded connection with the upper part of the sucker rod body, the conical hole presses the conical surface to enable the convex ring to press the upper part of the coating layer when the conical surface is contracted, the upper part of the coating layer is tightly adhered to the sucker rod body, and well fluid cannot permeate into a gap between the sucker rod body and the coating layer.

Description

Repair cladding sucker rod

Technical Field

The utility model belongs to a sucker rod that oil-well pump and beam-pumping unit are connected and are used in the oil field oil-well is a repair cladding sucker rod.

Background

In an oil field pumping system, a pumping rod is soaked in well fluid to work, the well fluid contains corrosive media to corrode the pumping rod, so that the service life of a pumping rod string is short, the production cycle of an oil well is short, and the economic benefit is poor. In order to solve the problem, a material type anti-corrosion sucker rod is used in the oil field, but the sucker rod is made of metal materials, has limited anti-corrosion capability and cannot completely solve the problem of corrosion. In the technical scheme related to Chinese patent 200620086330.8 entitled "eccentric wear prevention sucker rod", in practical use, it is found that well fluid can enter the anti-wear pipe, so that the sucker rod is corroded by the well fluid, and the fracture accident of the sucker rod is easy to happen. Therefore, the technical personnel design Chinese patent 2012203275962 'a novel eccentric wear prevention sucker rod', the sucker rod is subjected to QPQ salt bath treatment on the surface layer of the sucker rod (1) to form a QPQ salt bath layer (4), well liquid can enter the anti-wear tube sucker rod and cannot be corroded, the processing is complex, and the production cost of the sucker rod is greatly increased. Therefore, the technical personnel have designed Chinese patent 201520959166.6 'novel polyethylene half-coated sucker rod', the well fluid can not enter the gap between the sucker rod and the coating, the sucker rod can not be corroded, but one end of the sucker rod close to the wrench installation part is provided with a section without a coating anti-corrosion and anti-abrasion layer, so the sucker rod is called as a half-coating, and the uncoated section of the sucker rod is seriously corroded in actual use although other anti-corrosion measures are taken, so the Chinese patent 201520959166.6 'novel polyethylene half-coated sucker rod' can not achieve the ideal effect. Therefore, a technical worker designs 2020205817880 'a half-coating repair full-coating sucker rod', but the technical worker has a processing step of 'extruding the lower part of the pushing and receiving head', on one hand, processing equipment is needed, the production investment is increased, on the other hand, the lower part of the pushing and receiving head is extruded to reduce the diameter by 2-5mm, and a harder material cannot be selected, so that the strength of the pushing and receiving head is insufficient, if the harder material is selected, although the strength is sufficient, cracks are easily generated during extrusion, and the service life of the pushing and receiving head can be influenced.

Disclosure of Invention

The utility model aims at solving the problem of the existing problem of designing a repair cladding sucker rod, overcoming the problem of the existing, reducing the extrusion processing step, improving the production quality and the life of cladding sucker rod.

The purpose of the utility model is realized like this: the sucker rod comprises a joint, a coating layer and a sucker rod body, wherein the coating layer is coated on the sucker rod body, the lower part of the joint is in threaded connection with the upper part of the sucker rod body, the outer wall of a locking sleeve is a conical surface, the diameter of the upper end of the conical surface is small, the diameter of the lower end of the conical surface is large, a convex ring is arranged at the inner lower part of the locking sleeve, a plurality of milled open grooves are formed in the locking sleeve, the lower end of each open groove is opened, the inner diameter of the upper part of the locking sleeve is smaller than the diameter of a boss below the upper part threads of the sucker rod body, the locking sleeve is sleeved on the sucker rod body, the upper part of the coating layer is limited at the boss below the upper part threads of the sucker rod body, a conical hole is formed in the lower part of the joint, when the lower part of the joint is in threaded connection with the upper part of the sucker rod body, the conical hole presses the conical surface to enable the convex ring coating layer to press the upper part when the conical surface contracts, the upper part of the coating layer is tightly adhered to the sucker rod body, and well fluid cannot permeate into a gap between the sucker rod body and the upper part of the coating layer.

The lower end of the joint is provided with a blocking hole, and the aperture of the blocking hole is smaller than the diameter of the lower end of the locking sleeve.

The utility model has the advantages that: just can make the lock sleeve suppression coating when connecting with the sucker rod body of rod, prevent that well liquid from getting into the clearance between coating and the sucker rod body of rod, prevent that the sucker rod body of rod from taking place to corrode, improve the life of the sucker rod body of rod, prolong oil well production cycle, reduce the oil well workover, the utility model discloses need not adopt the extrusion step just can reach above-mentioned purpose, overcome the problem that prior art exists, have apparent economic benefits.

Drawings

Fig. 1 is an upper end assembly view of the present invention.

Figure 2 is an external view of the piece 3 of figure 1.

Detailed Description

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As can be seen from the figure, the embodiment of the utility model comprises a joint 1, a locking sleeve 3, a coating layer 4 and a sucker rod body 5, wherein the coating layer 4 is coated on the sucker rod body 5, the lower part of the joint 1 is in threaded connection with the upper part of the sucker rod body 5, the outer wall of the locking sleeve 3 is a conical surface 3-2, the upper end of the conical surface 3-2 is small in diameter and large in diameter, a convex ring 3-1 is arranged at the inner lower part of the locking sleeve 3, a plurality of milled open grooves 3-3 (radially milled through) are arranged on the locking sleeve 3, the lower end of the open grooves 3-3 is opened (the upper part in the longitudinal direction is not milled through and the lower part is milled through), the inner diameter of the upper part of the locking sleeve 3 is smaller than the boss diameter below the upper part of the sucker rod body 5, the locking sleeve 3 is sleeved on the sucker rod body 5, the upper part of the locking sleeve 3 is limited at the boss below the upper part of the sucker rod body 5, the lower part of the locking sleeve 3 wraps the upper part of the coating layer 4, the inner lower part of the joint 1 is provided with a conical hole 1-1, when the lower part of the joint 1 is in threaded connection with the upper part of the sucker rod body 5, the conical hole 1-1 presses the conical surface 3-2, so that the convex ring 3-1 presses the upper part of the coating layer 4 when the conical surface 3-2 contracts, the upper part of the coating layer 4 is tightly attached to the sucker rod body 5, and well fluid cannot permeate into a gap between the sucker rod body 5 and the upper part of the coating layer 4. The lower end of the joint 1 is provided with a blocking hole 1-2, and the aperture of the blocking hole 1-2 is smaller than the diameter of the lower end of the locking sleeve 3. The surface of the convex ring 3-1 is arc-shaped. The convex ring 3-1 is pressed on the coating layer 4 to form an arc-shaped groove which plays a role of fixing the coating layer 4.

In figure 1, the upper end structure chart of the utility model is shown, and the structures of the two ends of the utility model are the same. (the lower end is not shown), the upper thread of the upper end fitting is an internal thread (or an external thread), and the lower thread of the lower end fitting is typically an external thread.

The top end of the locking sleeve 3 is provided with a sealing ring 2 to prevent well fluid from entering the upper thread of the sucker rod body 5.

The utility model is suitable for an old sucker rod is restoreed to anticorrosive sucker rod, this is because the head of old sucker rod all can reuse after needing to restore, its head basically will remove current screw thread when restoreing the sucker rod, the processing can not go out standard sucker rod head again after removing current screw thread, and old sucker rod removes and processes into the structure as shown in the figure more easily after the head, consequently, with old sucker rod comparatively being fit for restoring to anticorrosive sucker rod, especially, be fit for old CYG22 sucker rod and restore to anticorrosive sucker rod (by the head structure decision of CYG22 sucker rod). The utility model can also be processed with a new rod.

Claims (2)

1. The utility model provides a repair cladding sucker rod, includes joint (1), coating (4), the sucker rod body of rod (5), coating (4) cladding is on the sucker rod body of rod (5), the lower part of joint (1) and the upper portion threaded connection of the sucker rod body of rod (5), characterized by: the outer wall of the locking sleeve (3) is a conical surface (3-2), the diameter of the upper end of the conical surface (3-2) is small, the diameter of the lower end of the conical surface is large, a convex ring (3-1) is arranged at the inner lower part of the locking sleeve (3), a plurality of milled open grooves (3-3) are arranged on the locking sleeve (3), the lower end of each open groove (3-3) is opened, the inner diameter of the upper part of the locking sleeve (3) is smaller than the diameter of a boss below the upper part thread of the sucker rod body (5), the locking sleeve (3) is sleeved on the sucker rod body (5), the upper inner part of the locking sleeve (3) is limited at the boss below the upper part thread of the sucker rod body (5), the upper part of the coating layer (4) is wrapped by the lower part of the locking sleeve (3), a conical hole (1-1) is arranged at the inner lower part of the joint (1), and when the upper part of the sucker rod body (5) is in threaded connection, the conical hole (1-1) presses the conical surface (3-2), so that the upper part of the coating layer (4) is pressed by the convex ring (3-1) when the conical surface (3-2) shrinks, the upper part of the coating layer (4) is tightly attached to the sucker rod body (5), and well fluid cannot penetrate into a gap between the sucker rod body (5) and the upper part of the coating layer (4).

2. The repair coated sucker rod of claim 1 wherein: the lower end of the joint (1) is provided with a blocking hole (1-2), and the aperture of the blocking hole (1-2) is smaller than the diameter of the lower end of the locking sleeve (3).

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