Double-sealing high-bending-resistance drill rod joint

Abstract

The utility model discloses a double-seal high-bending-resistance drill rod joint which comprises a drill rod joint end portion, a drill bit is installed at the bottom end of the drill rod joint end portion, and a protective layer wraps the outer wall of the drill bit. The protective layer comprises a chromium alloy plating layer arranged on the outer wall of the drill bit, a molybdenum alloy plating layer arranged on the outer wall of the chromium alloy plating layer, a cobalt alloy plating layer arranged on the outer wall of the molybdenum alloy plating layer, a polymer coating layer arranged on the outer wall of the cobalt alloy plating layer and a nitride coating layer arranged on the outer wall of the polymer coating layer; the chromium alloy plating layer, the molybdenum alloy plating layer and the cobalt alloy plating layer are electroplated on the surface of the drill rod joint, so that the corrosion resistance and the hardness of the drill rod joint are effectively improved, the surface of the joint can be better prevented from being damaged by oxidation, corrosion, abrasion and the like, and the service life is prolonged; the molybdenum alloy coating and the cobalt alloy coating are added, so that the strength, toughness and durability of the drill rod joint can be remarkably improved, and the drill rod joint can keep stable performance in high-temperature, high-pressure and severe environments.

Description

Technical Field

[0001] This utility model relates to the field of drill pipe technology, and in particular to a double-sealed high bending resistance drill pipe joint. Background Technology

[0002] A double-seal drill pipe joint is a device used in oil and gas extraction to connect drill pipes. It consists of two threaded sleeves that are connected to both ends of the drill pipe and sealed with sealing gaskets. This joint is commonly used to connect drill pipes of different types or sizes, transmitting torque and rotational force in the drilling well while preventing leakage and breakage. This joint design can improve drilling efficiency and safety and reduce the incidence of drilling accidents.

[0003] Existing double-seal drill pipe joints are complex in structure and use sealing gaskets and other components for sealing. As a result, these joints are prone to breakage or damage during drilling. Once the joint breaks, the drill pipe will detach from the wellhead, causing an oil well accident. In oil and gas extraction, the downhole environment is complex and contains a large amount of acidic substances, brine and other chemicals. These substances can corrode and damage the double-seal drill pipe joint, reducing its service life and reliability. Therefore, we propose a double-seal high bending resistance drill pipe joint. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, electroplating chromium alloy, molybdenum alloy, and cobalt alloy coatings on the surface of drill pipe joints effectively improves their corrosion resistance and hardness. This better prevents damage such as oxidation, corrosion, and wear to the joint surface, thus extending its service life.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a double-sealed high bending resistance drill pipe joint, including a drill pipe joint end, wherein a drill bit is installed at the bottom end of the drill pipe joint end, and the outer wall of the drill bit is covered with a protective layer.

[0006] As a preferred embodiment of the present invention, the protective layer includes a chromium alloy plating layer disposed on the outer wall of the drill bit, a molybdenum alloy plating layer disposed on the outer wall of the chromium alloy plating layer, a cobalt alloy plating layer disposed on the outer wall of the molybdenum alloy plating layer, a polymer coating disposed on the outer wall of the cobalt alloy plating layer, and a nitride coating disposed on the outer wall of the polymer coating layer.

[0007] As a preferred embodiment of this utility model, the chromium alloy plating is electroplated on the outer wall of the drill bit, and the thickness of the chromium alloy plating is set to millimeters.

[0008] As a preferred embodiment of this utility model, the molybdenum alloy coating is electroplated on the outer wall of the chromium alloy coating, and the thickness of the molybdenum alloy coating is set to millimeters.

[0009] As a preferred embodiment of this utility model, the cobalt alloy coating is electroplated on the outer wall of the molybdenum alloy coating, and the thickness of the cobalt alloy coating is set to millimeters.

[0010] As a preferred embodiment of this invention, the polymer coating is electroplated on the outer wall of the cobalt alloy coating, and the thickness of the polymer coating is set to millimeters.

[0011] As a preferred embodiment of this invention, the nitride coating is electroplated onto the outer wall of the polymer coating, and the thickness of the nitride coating is set to millimeters.

[0012] Compared with the prior art, the beneficial effects that this utility model can achieve are:

[0013] 1. Improved corrosion resistance and hardness: By electroplating chromium alloy, molybdenum alloy and cobalt alloy coatings on the surface of the drill pipe joint, the corrosion resistance and hardness of the drill pipe joint are effectively improved. This can better prevent the joint surface from being damaged by oxidation, corrosion and wear, and extend its service life.

[0014] 2. Increased strength and toughness: Adding molybdenum alloy coating and cobalt alloy coating can significantly improve the strength, toughness and durability of drill pipe joints, enabling them to maintain stable performance under high temperature, high pressure and harsh environments.

[0015] 3. Improved wear resistance: By applying polymer and nitride coatings, the wear resistance of the drill pipe joint is enhanced. The coatings can effectively prevent wear and damage to the drill pipe surface and extend its service life.

[0016] 4. Improved safety performance: The polymer coating also has an anti-slip effect, thereby improving the safety performance of the drill pipe joint and reducing the occurrence of accidents caused by slippage. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a front view schematic diagram of the structure of this utility model;

[0019] Figure 3 This is a top view schematic diagram of the structure of this utility model;

[0020] Figure 4 For the present utility model Figure 3 A magnified schematic diagram of the structure at point A.

[0021] The labels are as follows: 1. Drill pipe joint end; 2. Drill bit; 3. Protective layer; 31. Chromium alloy coating; 32. Molybdenum alloy coating; 33. Cobalt alloy coating; 34. Polymer coating; 35. Nitride coating. Detailed Implementation

[0022] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this utility model. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0023] Example:

[0024] like Figure 1-4 As shown, a double-sealed high bending resistance drill pipe joint includes a drill pipe joint end 1, a drill bit 2 is installed at the bottom end of the drill pipe joint end 1, and the outer wall of the drill bit 2 is wrapped with a protective layer 3.

[0025] The protective layer 3 includes a chromium alloy plating layer 31 disposed on the outer wall of the drill bit 2, a molybdenum alloy plating layer 32 disposed on the outer wall of the chromium alloy plating layer 31, a cobalt alloy plating layer 33 disposed on the outer wall of the molybdenum alloy plating layer 32, a polymer coating 34 disposed on the outer wall of the cobalt alloy plating layer 33, and a nitride coating 35 disposed on the outer wall of the polymer coating 34.

[0026] A chromium alloy plating 31 is electroplated on the outer wall of the drill bit 2. The thickness of the chromium alloy plating 31 is set to 1 mm, which can improve its corrosion resistance and hardness. Chromium alloy has good oxidation resistance, which can effectively prevent the drill pipe joint from being damaged by oxidation. At the same time, it can also improve the surface hardness of the drill pipe, thereby increasing its wear resistance. A molybdenum alloy plating 32 is electroplated on the outer wall of the chromium alloy plating 31. The thickness of the molybdenum alloy plating 32 is set to 1 mm. The molybdenum alloy plating 32 can maintain its strength and hardness under high temperature and high pressure, so it is a common durable material. By adding the molybdenum alloy plating 32 to the drill pipe joint, its corrosion resistance and strength can be significantly improved. In addition, the molybdenum alloy can also improve the toughness and durability of the joint, thereby extending its service life.

[0027] A cobalt alloy plating layer 33 is electroplated on the outer wall of the molybdenum alloy plating layer 32. The thickness of the cobalt alloy plating layer 33 is set to 1 mm. The cobalt alloy plating layer 33 is a high-strength, high-toughness alloy that can improve the strength and durability of the drill pipe joint. The cobalt alloy plating layer 33 has good corrosion resistance and can be used in harsh environments, such as seawater or chemical environments. Furthermore, the cobalt alloy plating layer 33 can also improve the wear resistance of the drill pipe joint, thereby extending its service life. A polymer coating 34 is electroplated on the outer wall of the cobalt alloy plating layer 33. The thickness of the polymer coating 34 is set to 1 mm. To improve its corrosion resistance and toughness, the coating can effectively prevent damage to the drill pipe surface from oxidation, corrosion, and wear. In addition, the coating can also play an anti-slip role, thereby improving the safety performance of the drill pipe joint. The nitride coating 35 is electroplated on the outer wall of the polymer coating 34. The thickness of the nitride coating 35 is set to 1 mm, which can improve its hardness and wear resistance. The nitride coating 35 has excellent wear resistance and can effectively prevent the drill pipe joint from being worn and damaged. In addition, the nitride coating 35 can also improve the corrosion resistance of the drill pipe joint, thereby extending its service life.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the utility model as defined by the appended claims and their equivalents.

Claims

1. A double-sealed high bending resistance drill pipe joint, comprising a drill pipe joint end (1), characterized in that: A drill bit (2) is installed at the bottom end of the drill pipe joint end (1). The outer wall of the drill bit (2) is covered with a protective layer (3). The protective layer (3) includes a chromium alloy plating (31) on the outer wall of the drill bit (2), a molybdenum alloy plating (32) on the outer wall of the chromium alloy plating (31), a cobalt alloy plating (33) on the outer wall of the molybdenum alloy plating (32), a polymer coating (34) on the outer wall of the cobalt alloy plating (33), and a polymer coating (34) on the outer wall of the polymer coating. Nitride coating (35) on the outer wall of layer (34), chromium alloy plating (31) electroplated on the outer wall of drill bit (2), the thickness of chromium alloy plating (31) is set to 1 mm, molybdenum alloy plating (32) electroplated on the outer wall of chromium alloy plating (31), the thickness of molybdenum alloy plating (32) is set to 1 mm, cobalt alloy plating (33) electroplated on the outer wall of molybdenum alloy plating (32), the thickness of cobalt alloy plating (33) is set to 1 mm.

2. The double-sealed high bending resistance drill pipe joint according to claim 1, characterized in that: The polymer coating (34) is electroplated on the outer wall of the cobalt alloy coating (33), and the thickness of the polymer coating (34) is set to 1 mm.

3. The double-sealed high bending resistance drill pipe joint according to claim 2, characterized in that: The nitride coating (35) is electroplated on the outer wall of the polymer coating (34), and the thickness of the nitride coating (35) is set to 1 mm.

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