CN211287562U

CN211287562U - Low-abrasion-resistance anode protection ring

Info

Publication number: CN211287562U
Application number: CN201922416451.4U
Authority: CN
Inventors: 史志升; 安子敬; 刘江涛; 宋中文; 史明欣
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-29
Filing date: 2019-12-29
Publication date: 2020-08-18
Anticipated expiration: 2029-12-29

Abstract

The utility model provides a low wearing resistance anode protection ring belongs to the well casing pipe accessory field of oil drilling usefulness, and its structure includes the annular protection ring body of circle, protection ring body wherein has 55-65 chamfers on the pipe wall of one end, has seted up a plurality of female screw holes at the middle part of protection ring body. The utility model discloses a low wearing hinders anode protection ring is because the chamfer with the wall thickness improves to about 60 degrees by about 45 degrees for this protection ring is gone into sheathed tube in-process resistance under and is reduced to the minimum after installing the sleeve pipe on, can play protective case's effect, can effectively reduce the resistance of lower sleeve pipe again, has realized "low wearing of sleeve pipe resistance and hinders", avoids the anode protection ring to the destruction of the wall of a well, the emergence of prevention accident.

Description

Low-abrasion-resistance anode protection ring

Technical Field

The utility model relates to an underground casing pipe accessory for petroleum drilling, in particular to a low-abrasion resistance anode protection ring which is arranged on the outer wall of a casing pipe when the casing pipe is arranged in a well completion.

Background

In the development process of oil fields, the service time of oil-water wells directly influences the development benefit, and the corrosion of casings directly shortens the service time of oil wells. At present, the condition of casing damage caused by corrosion of the casing commonly exists in various oil fields at home and abroad, the development benefit is seriously influenced, and the method is an important technical problem which is urgently needed to be solved by the oil fields.

The corrosion prevention method of the oil well casing is not a lot, and the method of using the stainless steel casing is more at present, but the price of the stainless steel casing is more expensive; in another method, an anode protection ring is sleeved on the outer wall of the sleeve, and the anode protection ring is corroded firstly by electrochemical corrosion generated in the production of the sleeve, so that the aim of protecting the sleeve is fulfilled. However, the existing anode protection ring has a small chamfer angle of the excircle, generally about 2 x 45 degrees, and is easy to generate a well wall scraping effect in the casing running process, so that partial mud cakes of the well wall are gradually scraped towards the underground part, the smoothness of casing running is influenced, and the serious problem can also cause annular blockage or collapse of the well wall, so that accidents occur. At present, no protective ring adopts a large chamfer angle to reduce the resistance of a running sleeve.

Disclosure of Invention

The technical task of the utility model is to provide a low-abrasion anode protection ring with a large chamfer and capable of greatly reducing the downward resistance aiming at the defects of the prior art. The scraping effect of the protective ring on the well wall is reduced to the minimum in the process of putting the sleeve, the application of the anode protective ring can play a role of a protective sleeve, the resistance of the sleeve can be effectively reduced, the low abrasion resistance of the sleeve resistance is realized when the tool is used, the damage of the anode protective ring on the well wall is avoided, and the occurrence of accidents is prevented.

The utility model provides a technical scheme that its technical problem adopted is:

the anode protection ring with low abrasion resistance comprises an annular protection ring body, wherein a 55-65-degree chamfer is formed in the pipe wall at one end of the protection ring body, so that the resistance of the protection ring is reduced to the minimum in the process of being placed into a sleeve after the protection ring is installed on the sleeve, and a plurality of female threaded holes are formed in the middle of the protection ring body.

Further, the wall thickness of the protective ring body is between 6-10 mm.

Further, the guard ring body has a length of between 18-25 cm.

Further, the protection ring body is cast.

Further, the protection ring body is a zinc-magnesium alloy body.

Further, the starting chamfer dimension L of the chamfer is 2-3.5mm from the nozzle.

Furthermore, the number of the female threaded holes is 4-6, and the protection ring is tightly arranged on the outer wall of the sleeve by using the inner hexagonal bolt when the sleeve is mounted on the sleeve, so that the protection ring is prevented from freely moving up and down, and the uniformity of corrosion resistance is improved.

Compared with the prior art, the anode protection ring with low abrasion resistance of the utility model has the advantages that,

the anode protection ring with low abrasion resistance of the utility model reduces the resistance to the minimum in the process of inserting the sleeve after being arranged on the sleeve because the chamfer angle of the wall thickness is improved from about 45 degrees to about 60 degrees,

the protective sleeve can play a role in protecting the sleeve, can effectively reduce the resistance of the sleeve, realizes the low abrasion resistance of the sleeve resistance, avoids the damage of the anode protective ring to the well wall, and prevents accidents.

Drawings

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

In the figure, 1, a protection ring body, 2, a chamfer, 3 and a female threaded hole.

Detailed Description

The low-wear anode guard ring of the present invention is described in detail below with reference to fig. 1.

As shown in attached figure 1, the structure of the anode protection ring with low abrasion resistance of the utility model comprises a circular protection ring body 1, which is a cast zinc-magnesium alloy body, the wall thickness of the protection ring body is between 6 mm and 10mm, the length of the protection ring body is between 18 cm and 25cm, a chamfer 2 with an angle of 55 degrees to 65 degrees is arranged on the pipe wall of one end of the protection ring body 1, and the starting chamfer dimension L of the chamfer 2 is 2 mm to 3.5mm away from the pipe orifice. 4-6 female thread holes 3 are arranged in the middle of the protective ring body 1.

In the process of putting the sleeve into the sleeve, the protection rings are sleeved on the outer wall of the sleeve one by one, and the protection rings are arranged on the outer wall of the sleeve through the inner hexagonal bolts, so that the protection rings are prevented from freely moving up and down. The running-in number of the protection ring is determined according to the calculation or estimation of the corrosion speed of the casing and the actual value of the mineralization degree of the stratum, and is embodied in the drilling design; the installation position is generally the middle part of the sleeve, and the protection ring is recommended to be installed every 3 sleeves. After the protective ring is installed, the sleeve can be normally buckled and lowered, and the lowering resistance can be reduced to the minimum by the large chamfer angle of the protective ring. The protective ring has no special requirements on the engineering parameters such as the speed of running in the casing, the torque of screwing on the casing and the like.

The anode protection ring with low abrasion resistance of the utility model is simple and convenient to process and manufacture, and can be processed and manufactured according to the attached drawings of the specification.

Claims

1. The anode protection ring with low abrasion resistance comprises a circular protection ring body (1) and is characterized in that a 55-65-degree chamfer (2) is formed in the pipe wall of one end of the protection ring body (1), and a plurality of female threaded holes (3) are formed in the middle of the protection ring body (1).

2. The low wear resistance anode guard ring according to claim 1, wherein the wall thickness of the guard ring body (1) is between 6-10 mm.

3. The low wear resistance anode guard ring according to claim 1, wherein the guard ring body (1) has a length of between 18-25 cm.

4. The low wear resistance anode guard ring according to claim 1, wherein the guard ring body (1) is cast.

5. The low wear resistance anode guard ring according to claim 1, wherein the guard ring body (1) is a zinc magnesium alloy body.

6. The low wear resistance anode guard ring according to claim 1, wherein the starting chamfer dimension L of the chamfer (2) is 2-3.5mm from the pipe orifice.

7. The low wear resistance anode guard ring according to claim 1, wherein the number of female threaded holes (3) is 4-6.