Wear-resistant parts, manufacturing process of wear-resistant parts, drill rod and drill string

Abstract

The present invention provides a wear-resistant part, a manufacturing process of the wear-resistant part, a drill rod and a drill string. The wear-resistant part comprises: a wearable body, an annular groove is provided on the outer side wall of the wearable body, and the annular groove is arranged along the circumference of the wearable body; an annular weldable base body is fixed in the annular groove; and a wear-resistant layer is welded on the outer side wall of the weldable base body. The present invention realizes the effective fixing of the wear-resistant layer on the pipe body of the titanium alloy drill rod joint, the aluminum alloy drill rod joint and the aluminum alloy drill rod, avoids the problem of drill rod failure caused by drill rod wear, improves the service life and wear resistance of the drill rod, and improves the cost performance of the titanium alloy drill rod and the aluminum alloy drill rod.

Description

Technical Field

[0001] This invention relates to the field of drilling technology, and in particular to a wear-resistant part, a manufacturing process for the wear-resistant part, a drill pipe, and a drill string. Background Technology

[0002] Titanium alloy and aluminum alloy drill pipes used in oil and gas exploration and development are characterized by corrosion resistance, low density, and high strength, making them suitable for the development of highly acidic oil and gas reservoirs, as well as drilling operations in ultra-deep and ultra-short horizontal wells. However, lightweight drill pipe materials such as titanium and aluminum alloys are highly oxidizable and have poor wear resistance. The wear-resistant band material of conventional steel drill pipes cannot be effectively fused and bonded with aluminum and titanium alloy materials. Due to the lack of a wear-resistant band layer, titanium alloy and aluminum alloy drill pipes will suffer severe wear during use, resulting in a short service life and increased application costs, seriously restricting their application and promotion. Summary of the Invention

[0003] The purpose of this invention is to provide a wear-resistant part, a manufacturing process for the wear-resistant part, a drill rod, and a drill string, so as to solve the problem that titanium alloy drill rods and aluminum alloy drill rods cannot be effectively fused and bonded with the wear-resistant layer in the prior art.

[0004] To achieve the above objectives, the present invention proposes a wear-resistant component, comprising: a wear-resistant body having an annular groove on its outer side wall, the annular groove being arranged circumferentially along the wear-resistant body; an annular weldable substrate fixed within the annular groove; and a wear-resistant layer welded to the outer side wall of the weldable substrate.

[0005] In the wear-resistant part described above, the weldable substrate and the wear-resistant body are connected by an anti-rotation structure.

[0006] As described above, the wear-resistant part includes a keyway on both ends of the annular groove and a convex key on both ends of the solderable substrate, wherein the convex key is embedded in the keyway.

[0007] In the wear-resistant part as described above, in the circumferential direction of the wear-resistant body, the keyway located on the first end face of the annular groove is misaligned with the keyway located on the second end face of the annular groove; in the circumferential direction of the weldable substrate, the convex key located on the first end face of the weldable substrate is misaligned with the convex key located on the second end face of the weldable substrate.

[0008] In the wear-resistant part described above, the weldable substrate has an outer annular surface with a uniform outer diameter, the outer surface of the convex key is coplanar with the outer annular surface of the weldable substrate, and the thickness of the convex key is less than the wall thickness of the weldable substrate.

[0009] The wear-resistant part as described above, wherein the weldable substrate is formed by the butt joint of two semi-circular rings.

[0010] In the wear-resistant part described above, the mating surfaces of the two semicircular rings are welded and fixed, and the weld between the two semicircular rings has an included angle with the central axis of the weldable substrate, the included angle being an acute angle.

[0011] The wear-resistant part as described above, wherein the included angle is 30° to 60°.

[0012] In the wear-resistant part described above, each of the semicircular rings has a chamfer on its mating surface, and a solder groove is formed between the chamfers on the mating surfaces of the two semicircular rings when they are mated.

[0013] In the wear-resistant part described above, there is a fitting gap between the end face of the weldable substrate and the end face of the annular groove, and the fitting gap is filled with adhesive.

[0014] In the wear-resistant part described above, the outer diameter of the weldable substrate is 0.6 mm to 1.0 mm smaller than the outer diameter of the wear-resistant body, and the outer diameter of the wear-resistant layer is 1.0 mm to 1.5 mm larger than the outer diameter of the wear-resistant body.

[0015] As described above, the wear-resistant part is an aluminum alloy drill pipe joint or a titanium alloy drill pipe joint.

[0016] As described above, the wear-resistant part is wherein the wear-resistant body is the tube body of an aluminum alloy drill rod, and the annular groove is provided on the thickened section in the middle of the tube body.

[0017] The present invention also proposes a manufacturing process for wear-resistant parts, which is used to manufacture the aforementioned wear-resistant parts. The manufacturing process includes: step S100: machining an annular groove on the outer wall of the wear-resistant body; step S200: welding a wear-resistant layer on the outer wall of the weldable substrate; step S300: milling the wear-resistant layer along a preset trajectory to obtain an opening that exposes the weldable substrate; step S400: cutting the weldable substrate into two semi-circular rings along the opening; step S500: fixing the two semi-circular rings in the annular groove.

[0018] The manufacturing process of the wear-resistant part as described above, wherein the inner diameter of the weldable substrate in step S200 is smaller than the outer diameter of the annular groove, the manufacturing process further includes step S310: enlarging the weldable substrate so that the inner diameter of the weldable substrate is larger than the outer diameter of the annular groove.

[0019] The manufacturing process of the wear-resistant part as described above further includes step S110: machining key connection structures on the annular groove and the weldable substrate respectively; in step S500, while the two semicircular rings are placed into the annular groove, the key connection structures of the two semicircular rings and the annular groove are engaged.

[0020] The manufacturing process of the wear-resistant part as described above, wherein step S500 includes: step S501: placing two semicircular rings into the annular groove and clamping and positioning the two semicircular rings using an auxiliary fixing clamp; step S502: welding and fixing the mating surfaces of the two semicircular rings; step S503: removing the auxiliary fixing clamp; step S504: filling the mating gap between the end face of the weldable substrate and the end face of the annular groove with adhesive.

[0021] The present invention also proposes a manufacturing process for a wear-resistant part, which is used to manufacture the aforementioned wear-resistant part. The manufacturing process includes: step S100: machining an annular groove on the outer wall of the wear-resistant body; step S200: cutting the weldable substrate into two semi-circular rings; step S300: placing the two semi-circular rings into the annular groove and clamping and positioning the two semi-circular rings using an auxiliary fixing clamp; step S400: welding a wear-resistant layer on the outer wall of the two semi-circular rings, ensuring that the wear-resistant layer avoids the mating surface of the two semi-circular rings; step S500: welding and fixing the mating surfaces of the two semi-circular rings; step S600: removing the auxiliary fixing clamp.

[0022] The present invention also proposes a drill rod, wherein the drill rod includes the aforementioned wear-resistant component.

[0023] The present invention also proposes a drill string, wherein the drill string comprises the drill rod described above.

[0024] The characteristics and advantages of the wear-resistant parts, the manufacturing process of the wear-resistant parts, the drill rods and drill strings of the present invention are as follows:

[0025] 1. This invention achieves effective fixation of the wear-resistant layer on the tube body of titanium alloy drill rod joints, aluminum alloy drill rod joints, and aluminum alloy drill rods by setting an easy-to-weld substrate that can easily bond with the wear-resistant layer. This avoids drill rod failure caused by drill rod wear, improves the service life and wear resistance of the drill rod, and improves the cost performance of titanium alloy drill rods and aluminum alloy drill rods.

[0026] 2. In this invention, the weldable substrate and the wear-resistant body are circumferentially fixed by an anti-rotation structure, so that there will be no relative rotation between the weldable substrate and the wear-resistant body, reducing the risk of the wear-resistant structure falling off during the operation of the drill pipe and improving safety and reliability.

[0027] 3. In this invention, the easy-to-weld substrate is composed of two semi-circular rings, which are easy to install. The two semi-circular rings are welded and fixed, which is firm and reliable. The weld between the two semi-circular rings is inclined relative to the axial direction of the easy-to-weld substrate, which can decompose the frictional force between the weld and the well wall or casing, improve the weld's resistance to circumferential friction, reduce the risk of weld cracking, and further improve the safety and reliability of the easy-to-weld substrate.

[0028] 4. In this invention, the gap between the end face of the weldable substrate and the end face of the annular groove is filled with adhesive to help fix the weldable substrate by bonding, thereby further improving the connection reliability between the weldable substrate and the wear-resistant body. Attached Figure Description

[0029] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

[0030] Figure 1 This is a schematic diagram of the structure of a wear-resistant part according to an embodiment of the present invention;

[0031] Figure 2 This is a front view of the wear-resistant body in this invention;

[0032] Figure 3 This is a half-sectional view of the wear-resistant body in this invention;

[0033] Figure 4 This is a front view of the solderable substrate in this invention;

[0034] Figure 5 This is a side view of the solderable substrate in this invention;

[0035] Figure 6 This is a schematic diagram of the auxiliary fixing clip in this invention;

[0036] Figure 7 This is a flowchart of a manufacturing process for the wear-resistant part of the present invention;

[0037] Figure 8 yes Figure 7 Fluid diagram showing two semi-circular rings fixed within an annular groove;

[0038] Figure 9 This is a flowchart of another manufacturing process for the wear-resistant parts of the present invention.

[0039] Explanation of key component designations:

[0040] 1. Easily worn body; 11. Annular groove; 12. Keyway;

[0041] 2. Solderable base; 21. Semi-circular ring; 211. Chamfer;

[0042] 3. Wear-resistant layer; 4. Protruding key; 5. Weld seam;

[0043] 6. Solder tank; 7. Adhesive; 8. Auxiliary fixing clip; 9. Bolt; 10. Fitting clearance. Detailed Implementation

[0044] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments are now described with reference to the accompanying drawings. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more.

[0045] Implementation Method 1

[0046] like Figure 1 As shown, the present invention provides a wear-resistant component, comprising a tubular wear-resistant body 1, an annular weldable substrate 2, and a wear-resistant layer 3, which can also be referred to as a wear-resistant band. An annular groove 11 is provided on the outer wall of the wear-resistant body 1, and the annular groove 11 is arranged along the circumference of the wear-resistant body 1. The weldable substrate 2 is fixed in the annular groove 11, so the weldable substrate 2 has good strength and toughness, and good welding performance. The wear-resistant layer 3 is welded to the outer wall of the weldable substrate 2. The wear-resistant layer 3 and the weldable substrate 2 constitute a wear-resistant structure disposed on the wear-resistant body 1. The present invention solves the problem that the wear-resistant body 1 cannot effectively fuse and bond with the wear-resistant band layer by providing a weldable substrate 2 that is easy to bond with the wear-resistant layer 3.

[0047] For example, the wear-resistant body 1 is made of titanium alloy or aluminum alloy. For instance, the wear-resistant body 1 is a titanium alloy drill pipe joint, an aluminum alloy drill pipe joint, or the tube body of an aluminum alloy drill pipe. When the wear-resistant body 1 is the tube body of an aluminum alloy drill pipe, the annular groove 11 is located on the middle thickened section of the tube body. Therefore, when the drill pipe is working downhole, the wear-resistant layer 3 located at the middle thickened section of the aluminum alloy tube body contacts the well wall or casing, preventing the well wall and casing from wearing down the aluminum alloy tube body and protecting the tube body.

[0048] For example, the material of the weldable substrate 2 is steel (e.g., carbon steel), weldable alloy, or other existing materials with good weldability.

[0049] This invention achieves effective fixation of the wear-resistant layer 3 on the tube body of titanium alloy drill rod joints, aluminum alloy drill rod joints, and aluminum alloy drill rods by setting an easy-to-weld substrate 2 that can easily bond with the wear-resistant layer 3. This avoids drill rod failure caused by drill rod wear, improves the service life and wear resistance of drill rods, and enhances the cost-effectiveness of titanium alloy drill rods and aluminum alloy drill rods.

[0050] Because the surface of the easy-to-weld substrate 2 (such as a steel substrate) can be repaired with wear-resistant materials multiple times, such as when the wear-resistant layer 3 is worn, the service life of the drill rod is further improved.

[0051] In one embodiment of the present invention, the weldable substrate 2 and the wear-resistant body 1 are connected by an anti-rotation structure to fix the weldable substrate 2 and the wear-resistant body 1 circumferentially, prevent them from rotating relative to each other, reduce the risk of the wear-resistant structure falling off during the operation of the drill pipe, and improve safety and reliability.

[0052] In the first specific embodiment, the anti-rotation structure is a key connection structure connecting the end of the easy-to-weld substrate 2 and the end of the annular groove 11. That is, the end of the easy-to-weld substrate 2 and the end of the easy-to-wear body 1 are connected by a key. The structure is simple, easy to process, and easy to install.

[0053] like Figure 2 , Figure 4 As shown, in the first technical solution of this embodiment, the anti-rotation structure includes keyways 12 provided on both end faces of the annular groove 11 and protruding keys 4 provided on both end faces of the solderable substrate 2, with the protruding keys 4 embedded in the keyways 12.

[0054] Specifically, multiple keyways 12 are provided on both end faces of the annular groove 11, and correspondingly, multiple raised keys 4 are provided on both end faces of the easy-to-weld substrate 2. The multiple raised keys 4 and the multiple keyways 12 correspond one-to-one, and each raised key 4 is embedded in the corresponding keyway 12. Since both the easy-to-wear body 1 and the easy-to-weld substrate 2 are annular parts, the keyways 12 are arc-shaped grooves, and the raised keys 4 are arc-shaped keys.

[0055] Furthermore, multiple keyways 12 located at the same end of the annular groove 11 are evenly distributed along the circumference of the wear-resistant body 1, and multiple protruding keys 4 located at the same end of the weldable substrate 2 are evenly distributed along the circumference of the weldable substrate 2.

[0056] For example, the two ends of the annular groove 11 are provided with two keyways 12, and the two ends of the easy-to-weld substrate 2 are provided with two protruding keys 4.

[0057] like Figure 2 , Figure 3 , Figure 4 As shown, further, in the circumferential direction of the wear-resistant body 1, the keyway 12 located on the first end face of the annular groove 11 is misaligned with the keyway 12 located on the second end face of the annular groove 11. Correspondingly, in the circumferential direction of the weldable substrate 2, the convex key 4 located on the first end face of the weldable substrate 2 is misaligned with the convex key 4 located on the second end face of the weldable substrate 2, in order to further improve the connection reliability. The misalignment angle between the keyways 12 and the misalignment angle between the convex keys 4 are the same. The misalignment in the circumferential direction can be understood as not being directly opposite each other in the axial direction. For example, the relative circumferential angle between the keyways 12 at both ends of the annular groove 11 is 30° to 60°, preferably 45°.

[0058] Furthermore, the weldable substrate 2 has an outer annular surface with a uniform outer diameter. The outer surface of the convex key 4 is coplanar with the outer annular surface of the weldable substrate 2. The thickness of the convex key 4 is less than the wall thickness of the weldable substrate 2. Therefore, the inner annular surface of the weldable substrate 2 and the inner surface of the convex key 4 form a stepped surface. The reason for this design is that the wear-resistant layer 3 needs to be welded on the weldable substrate 2, and welding the wear-resistant layer 3 will generate a heat-affected zone, thus requiring a larger wall thickness. However, the wear-resistant layer 3 does not need to be welded on the convex key 4, so the wall thickness can be reduced. The advantage of reducing the wall thickness of the convex key 4 is that the depth of the keyway 12 on the wear-resistant body 1 can be reduced, thereby reducing stress concentration at the keyway 12 and making the wear-resistant part safer in use.

[0059] For example, the circumferential length of each keyway 12 is 20mm to 40mm, such as 40±0.2mm; the axial depth of the keyway 12 in the axial direction of the easy-to-wear body 1 is 8mm to 15mm, such as 10±0.1mm; the radial depth of the keyway 12 in the radial direction of the easy-to-wear body 1 is 4mm to 6mm, such as 4.0±0.1mm; the circumferential length of each convex key 4 is 0 to 0.3mm smaller than the circumferential length of the keyway 12, such as 39.8±0.2mm; the axial length of the convex key 4 in the axial direction of the easy-to-weld substrate 2 is 0 to 0.3mm smaller than the axial depth of the keyway 12, such as 9.9±0.1mm; and the thickness of the convex key 4 is 3.5±0.1mm.

[0060] like Figure 4 As shown, the solderable substrate 2 and the protruding keys 4 located at both ends of it are integral structures.

[0061] In the second technical solution of this embodiment, the anti-rotation structure includes a convex key on both end faces of the annular groove 11 and a keyway on both end faces of the easy-to-solder substrate 2. The convex key is embedded in the keyway, which means that the positions of the keyway and the convex key in the first technical solution are interchanged, and the same effect of fixing the easy-to-solder substrate 2 in the circumferential direction can be achieved.

[0062] The number and arrangement of keyways and convex keys in this solution can be set with reference to the first technical solution, so they will not be described in detail here.

[0063] In the third technical solution of this embodiment, the anti-rotation structure includes a first keyway on both end faces of the annular groove 11, a second keyway on both end faces of the easy-to-weld substrate 2, and a connecting key. The first keyway and the second keyway correspond one-to-one and are connected. The connecting key is embedded in the first keyway and the second keyway, thereby circumferentially positioning the easy-to-weld substrate 2 and the easy-to-wear body 1.

[0064] In this solution, to prevent the connecting key from falling off, it can be fixed to the first keyway and the second keyway by welding.

[0065] The number and arrangement of the first keyway and the number and arrangement of the second keyway in this solution can be set with reference to the first technical solution, so they will not be described in detail.

[0066] In the second specific embodiment, the anti-rotation structure is a key connection structure that connects the inner side of the easy-to-solder substrate 2 and the bottom surface (i.e., the bottom wall of the groove) of the annular groove 11. The structure is simple, easy to process, and easy to install.

[0067] In one feasible technical solution of this embodiment, the anti-rotation structure includes a spline on the inner side of the easy-to-solder substrate 2 and multiple keyways on the bottom surface of the annular groove 11, with the spline cooperating with the multiple keyways.

[0068] In one embodiment of the present invention, the solderable substrate 2 is formed by joining two semi-circular rings 21 together, so as to facilitate the installation of the solderable substrate 2 into the annular groove 11.

[0069] like Figure 4 As shown, further, the mating surfaces of the two semicircular rings 21 are welded and fixed. The weld 5 between the two semicircular rings 21 has an included angle α with the central axis of the weldable substrate 2. This included angle α is an acute angle, for example, 30° to 60°, preferably 45°. This included angle α makes the weld 5 not parallel to the axial direction of the weldable substrate 2, but inclined relative to the axial direction of the weldable substrate 2. The advantage of this setting is that during the operation of the drill pipe, the wear-resistant structure rotates with the drill pipe, and the wear-resistant layer 3 contacts the well wall / casing. The contact force (i.e., friction) between the two is circumferential. By setting the weld 5 to be inclined relative to the axial direction of the weldable substrate 2, the friction force between the weld 5 and the well wall / casing can be decomposed, improving the bearing capacity of the weld 5 against circumferential friction, reducing the risk of weld 5 cracking, and improving the safety and reliability of the weldable substrate 2.

[0070] Specifically, the two semicircular rings 21 are obtained by cutting a ring (e.g., a steel metal ring) in half. The cutting direction is not the axial direction of the ring, but is inclined at an acute angle relative to the axial direction of the ring. Therefore, the two cutting surfaces (hereinafter referred to as mating surfaces) of each semicircular ring 21 are inclined surfaces relative to the axial direction.

[0071] Furthermore, when the solderable substrate 2 has protruding keys 4 at both ends, the cutting surfaces of the two semicircular rings 21 pass through the protruding keys 4. That is, when cutting the ring, at least one protruding key 4 located at the first end of the ring and at least one protruding key 4 located at the second end of the ring are also cut off, thereby cutting the protruding key 4 into two halves. This will make it easier for the protruding key 4 to be embedded into the keyway 12. For example, the cutting surface passes through the center position of the protruding key 4.

[0072] Furthermore, the two semicircular rings 21 are connected by welding.

[0073] like Figure 5 As shown, further, each semicircular ring 21 has a chamfer 211 on its mating surface. When the two semicircular rings 21 are mated, a solder groove 6 is formed between the chamfers 211 on the mating surfaces of the two semicircular rings 21, so as to connect the two semicircular rings 21 by submerged arc welding. For example, the chamfer 211 is 10±0.5°, and the depth of the chamfer surface of the chamfer 211 in the radial direction of the semicircular ring 21 is 3.0±0.1mm.

[0074] like Figure 1 As shown, in one embodiment of the present invention, there is a mating gap 10 between the end face of the solderable substrate 2 and the end face of the annular groove 11. The mating gap 10 is filled with adhesive 7, such as a metal adhesive, thereby assisting in fixing the solderable substrate 2 by bonding, further improving the connection reliability between the solderable substrate 2 and the wear-resistant body 1. For example, the metal adhesive can withstand high temperatures of 160℃ to 220℃.

[0075] In one embodiment of the present invention, the hardness value of the wear-resistant layer 3 is not less than HRC56 or greater than HRC53, so that the wear-resistant layer 3 has good wear resistance. For example, the material of the wear-resistant layer 3 is a high-chromium iron-based alloy material or tungsten carbide material, which has high hardness and good wear resistance. The thickness of the wear-resistant layer 3 is 2.0±0.2mm.

[0076] Furthermore, the wear-resistant layer 3 is welded to the surface of the weldable substrate 2 by a welding method. For example, this welding method is laser welding.

[0077] like Figure 1 , Figure 2 , Figure 4 As shown, in one embodiment of the present invention, the outer diameter D3 of the weldable substrate 2 is 0.6 mm to 1.0 mm smaller than the outer diameter D2 of the wearable body 1, so as to facilitate the welding of the wear-resistant layer 3. The outer diameter D1 of the wear-resistant layer 3 is 1.0 mm to 1.5 mm larger than the outer diameter D2 of the wearable body 1, so that the wear-resistant layer 3 protrudes from the outer surface of the wearable body 1, preventing the wearable body 1 from contacting the well wall / casing and being worn.

[0078] In one embodiment of the present invention, the width of the annular groove 11 is 50mm to 78mm, for example, 72.2±0.1mm; the depth of the annular groove 11 is 4mm to 6mm, for example, 4.5±0.1mm; the axial length of the solderable substrate 2 is 66mm to 118mm, for example, 92.0±0.2mm; and the thickness of the solderable substrate 2 is 4.0±0.1mm.

[0079] Implementation Method 2

[0080] like Figure 7As shown, the present invention also provides a manufacturing process for a wear-resistant part, which is used to manufacture the wear-resistant part of Embodiment 1. The manufacturing process includes:

[0081] Step S100: Machining an annular groove 11 on the outer wall of the wear-resistant body 1;

[0082] Step S200: Weld the wear-resistant layer 3 onto the outer wall of the weldable substrate 2;

[0083] Step S300: Mill the wear-resistant layer 3 along a preset trajectory to obtain a slot that exposes the weldable substrate 2. For example, the width of the slot is 2.0mm to 4.0mm.

[0084] Step S400: Cut the weldable substrate 2 into two semi-circular rings 21 along the opening;

[0085] Step S500: Fix the two semicircular rings 21 in the annular groove 11.

[0086] like Figure 2 , Figure 5 As shown, in one embodiment of the present invention, the inner diameter d of the weldable substrate 2 in step S200 is smaller than the outer diameter D4 of the annular groove 11. The outer diameter D4 of the annular groove 11 is also the diameter of the annular bottom surface of the annular groove 11. For example, the inner diameter d of the weldable substrate 2 is 8.0 mm to 10.0 mm smaller than the outer diameter D4 of the annular groove 11. Since the inner diameter d of the weldable substrate 2 is smaller and the thickness is larger when welding the wear-resistant layer 3, it is beneficial to weld the wear-resistant layer 3. After the welding of the wear-resistant layer 3 is completed, in order to facilitate the installation of the weldable substrate 2 onto the annular groove 11, the inner diameter d of the weldable substrate 2 is smaller and the thickness is larger. Within the annular groove 11, the weldable substrate 2 needs to be enlarged so that the inner diameter d of the weldable substrate 2 is greater than the outer diameter of the annular groove 11. Therefore, the manufacturing process of the present invention also includes step S310: enlarging the weldable substrate 2 so that the inner diameter d of the weldable substrate 2 is greater than the outer diameter D4 of the annular groove 11. For example, after the enlargement process, the inner diameter d of the weldable substrate 2 is 0.1 mm to 0.5 mm larger than the outer diameter D4 of the annular groove 11, such as 0.3 mm larger. Therefore, the weldable substrate 2 and the annular groove 11 are in clearance fit.

[0087] like Figure 7 As shown, in one embodiment of the present invention, the manufacturing process further includes step S110: machining key connection structures on the annular groove 11 and the easy-to-solder substrate 2 respectively, so as to facilitate the subsequent key connection of the easy-to-solder substrate 2 and the easy-to-wear body 1; correspondingly, in step S500, while the two semi-circular rings 21 are placed into the annular groove 11, the key connection structures of the two semi-circular rings 21 and the annular groove 11 are engaged.

[0088] For example, in step S110, keyways 12 are machined on both ends of the annular groove 11, and protruding keys 4 are machined on both ends of the solderable substrate 2; in step S500, while the two semicircular rings 21 are placed into the annular groove 11, the protruding keys 4 at both ends of the two semicircular rings 21 are embedded in the keyways 12 at both ends of the annular groove 11.

[0089] However, the present invention is not limited thereto. Protruding keys can be processed on both ends of the annular groove 11, keyways can be processed on both ends of the solderable substrate 2, or keyways can be processed on both ends of the annular groove 11 and both ends of the solderable substrate 2.

[0090] like Figure 8 As shown, in one embodiment of the present invention, step S500 includes:

[0091] Step S501: Place the two semicircular rings 21 into the annular groove 11, and use the auxiliary fixing clamp 8 to clamp and position the two semicircular rings 21 to position the two semicircular rings 21 circumferentially, so as to facilitate subsequent welding.

[0092] Step S502: Weld the mating surfaces of the two semicircular rings 21 to fix them in place;

[0093] Step S503: Remove the auxiliary fixing clip 8;

[0094] Step S504: Fill the mating gap 10 between the end face of the solderable substrate 2 and the end face of the annular groove 11 with adhesive 7 to help fix the solderable substrate 2 by bonding.

[0095] like Figure 6 As shown, the auxiliary fixing clip 8 is a clamping ring with a notch, and the two free ends of the clamping ring are connected by bolts 9, which makes it easy to assemble and disassemble.

[0096] The manufacturing process of this invention adds a wear-resistant structure to the body of titanium alloy drill pipe joints, aluminum alloy drill pipe joints, or aluminum alloy drill pipes, solving the technical problem of difficulty in adding a wear-resistant layer to titanium alloy drill pipes and aluminum alloy drill pipes. This effectively reduces the risk of wear failure of titanium alloy drill pipes and aluminum alloy drill pipes, improves their service life, and enhances their cost-effectiveness.

[0097] Implementation Method 3

[0098] like Figure 9 As shown, the present invention also provides a manufacturing process for a wear-resistant part, which is used to manufacture the wear-resistant part of Embodiment 1. The manufacturing process includes:

[0099] Step S10: Machining an annular groove 11 on the outer wall of the wear-resistant body 1;

[0100] Step S20: Cut the solderable substrate 2 into two semi-circular rings 21;

[0101] Step S30: Place the two semicircular rings 21 into the annular groove 11, and use the auxiliary fixing clamp 8 to clamp and position the two semicircular rings 21 to position the two semicircular rings 21 circumferentially, so as to facilitate subsequent welding.

[0102] Step S40: Weld the wear-resistant layer 3 to the outer side wall of the two semicircular rings 21, and make the wear-resistant layer 3 avoid the mating surface of the two semicircular rings 21, that is, do not weld the wear-resistant layer 3 at the mating surface of the two semicircular rings 21, and leave a gap to expose the easy-to-weld substrate 2, for example, the width of the gap is 2.0mm to 4.0mm.

[0103] Step S50: Weld the mating surfaces of the two semicircular rings 21 to fix them in place;

[0104] Step S60: Remove the auxiliary fixing clip 8.

[0105] like Figure 9 As shown, in one embodiment of the present invention, the manufacturing process further includes step S11: machining key connection structures on the annular groove 11 and the easy-to-solder substrate 2 respectively, so as to facilitate the subsequent key connection of the easy-to-solder substrate 2 and the easy-to-wear body 1; correspondingly, in step S30, while the two semi-circular rings 21 are placed into the annular groove 11, the key connection structures of the two semi-circular rings 21 and the annular groove 11 are engaged.

[0106] For example, in step S11, keyways 12 are machined on both ends of the annular groove 11, and protruding keys 4 are machined on both ends of the solderable substrate 2; in step S30, while the two semicircular rings 21 are placed into the annular groove 11, the protruding keys 4 at both ends of the two semicircular rings 21 are embedded in the keyways 12 at both ends of the annular groove 11.

[0107] However, the present invention is not limited thereto. Protruding keys can be processed on both ends of the annular groove 11, keyways can be processed on both ends of the solderable substrate 2, or keyways can be processed on both ends of the annular groove 11 and both ends of the solderable substrate 2.

[0108] like Figure 9 As shown, the manufacturing process further includes step S70: filling the mating gap 10 between the end face of the solderable substrate 2 and the end face of the annular groove 11 with adhesive 7 to help fix the solderable substrate 2 by bonding.

[0109] The manufacturing process of this invention adds a wear-resistant structure to the body of titanium alloy drill pipe joints, aluminum alloy drill pipe joints, or aluminum alloy drill pipes, solving the technical problem of difficulty in adding a wear-resistant layer to titanium alloy drill pipes and aluminum alloy drill pipes. This effectively reduces the risk of wear failure of titanium alloy drill pipes and aluminum alloy drill pipes, improves their service life, and enhances their cost-effectiveness.

[0110] Implementation Method 4

[0111] The present invention also provides a drill pipe, which includes the wear-resistant component of Embodiment 1.

[0112] In a first embodiment of the present invention, the wear-resistant component is a titanium alloy drill pipe joint. The drill pipe includes a titanium alloy drill pipe joint and a titanium alloy drill pipe body. Since the titanium alloy drill pipe body does not have a thickened section in the middle, there is no need to set a wear-resistant structure on the titanium alloy drill pipe body.

[0113] In a second embodiment of the present invention, the wear-resistant component is an aluminum alloy drill pipe joint, and the drill pipe includes an aluminum alloy drill pipe joint and an aluminum alloy drill pipe body.

[0114] In a third embodiment of the present invention, the wear-resistant component is an aluminum alloy drill rod body, and the drill rod includes an aluminum alloy drill rod body and a connector, which is an aluminum alloy drill rod connector or a steel connector.

[0115] The drill rod of the present invention has a wear-resistant structure, which effectively reduces the risk of wear failure of titanium alloy drill rods and aluminum alloy drill rods, improves the service life of titanium alloy drill rods and aluminum alloy drill rods, and improves the cost performance of titanium alloy drill rods and aluminum alloy drill rods.

[0116] Implementation Method 5

[0117] The present invention also provides a drill string, which includes the drill rod of embodiment four.

[0118] The drill string of this invention has a wear-resistant structure, which effectively reduces the risk of wear failure of titanium alloy drill rods and aluminum alloy drill rods, improves the service life of titanium alloy drill rods and aluminum alloy drill rods, and improves the cost performance of titanium alloy drill rods and aluminum alloy drill rods.

[0119] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention. Furthermore, it should be noted that the components of the present invention are not limited to the overall application described above. Each technical feature described in the specification can be used individually or in combination as needed. Therefore, the present invention naturally covers other combinations and specific applications related to the inventive points of this case.

Claims

1. A wear-resistant part, characterized in that: The wear-resistant parts include: The wearable body has an annular groove on its outer side wall, and the annular groove is arranged along the circumference of the wearable body; An annular easy-to-weld base body is fixed in the annular groove; A wear-resistant layer welded to the outer side wall of the easy-to-weld base; The easy-to-weld base is formed by butting two semicircular rings, the butting surfaces of the two semicircular rings are welded and fixed, and there is an angle between the weld between the two semicircular rings and the central axis of the easy-to-weld base, and the angle is an acute angle.

2. The wear-resistant part according to claim 1, characterized in that: The easy-to-weld base and the easy-to-wear body are connected via an anti-rotation structure.

3. The wear-resistant part according to claim 2, characterized in that: The anti-rotation structure comprises keyways arranged on both end surfaces of the annular groove and convex keys arranged on both end surfaces of the easy-to-weld base, and the convex keys are embedded in the keyways.

4. The wear-resistant part according to claim 3, characterized in that: In the circumferential direction of the easy-to-wear body, the keyway located on the first end face of the annular groove is staggered with the keyway located on the second end face of the annular groove; in the circumferential direction of the easy-to-weld base, the convex key located on the first end face of the easy-to-weld base is staggered with the convex key located on the second end face of the easy-to-weld base.

5. The wear-resistant part according to claim 3, characterized in that: The easy-to-weld base has an outer annular surface with a constant outer diameter, the outer side surface of the convex key is coplanar with the outer annular surface of the easy-to-weld base, and the thickness of the convex key is smaller than the wall thickness of the easy-to-weld base.

6. The wear-resistant part according to claim 1, characterized in that: The angle is 30° to 60°.

7. The wear-resistant part according to claim 1, characterized in that: The butt joint surfaces of the semicircular rings are respectively provided with chamfers. When the two semicircular rings are butt jointed, a solder groove is formed between the chamfers on the butt joint surfaces of the two semicircular rings.

8. The wear-resistant part according to claim 1, characterized in that: There is a fitting gap between the end surface of the easy-to-weld base and the end surface of the annular groove, and the fitting gap is filled with adhesive.

9. The wear-resistant part according to claim 1, characterized in that: The outer diameter of the easily weldable base is 0.6 mm to 1.0 mm smaller than the outer diameter of the easily wearable body, and the outer diameter of the wear-resistant layer is 1.0 mm to 1.5 mm larger than the outer diameter of the easily wearable body.

10. The wear-resistant part according to any one of claims 1 to 9, characterized in that: The wearable body is an aluminum alloy drill rod joint or a titanium alloy drill rod joint.

11. The wear-resistant part according to any one of claims 1 to 9, characterized in that: The wearable body is a tube body of an aluminum alloy drill rod, and the annular groove is arranged on the middle thickened section of the tube body.

12. A manufacturing process for wear-resistant parts, characterized in that: The manufacturing process of the wear-resistant part is used to manufacture the wear-resistant part according to any one of claims 1 to 11, and the manufacturing process comprises: Step S100: machining an annular groove on the outer side wall of the wearable body; Step S200: welding a wear-resistant layer on the outer side wall of the easy-to-weld base; Step S300: milling the wear-resistant layer along a preset trajectory to obtain an opening that exposes the easily welded substrate; Step S400: cutting the easy-to-weld base into two semicircular rings along the opening; Step S500: Fix the two semicircular rings in the annular groove.

13. The manufacturing process of the wear-resistant part according to claim 12, characterized in that: The inner diameter of the easy-to-weld substrate in step S200 is smaller than the outer diameter of the annular groove. The manufacturing process further includes step S310: performing hole expansion processing on the easy-to-weld substrate to make the inner diameter of the easy-to-weld substrate larger than the outer diameter of the annular groove.

14. The manufacturing process of the wear-resistant part according to claim 12, characterized in that: The manufacturing process further includes step S110: processing key connection structures on the annular groove and the easy-to-weld base respectively; In step S500, while the two semi-circular rings are placed into the annular groove, the key connection structures of the two semi-circular rings and the annular groove are matched.

15. The manufacturing process of the wear-resistant part according to claim 12, characterized in that: The step S500 includes: Step S501: placing two semicircular rings into the annular groove, and clamping and positioning the two semicircular rings with auxiliary fixing clamps; Step S502: welding and fixing the butt joint surfaces of the two semicircular rings; Step S503: removing the auxiliary fixing clip; Step S504: filling adhesive into the matching gap between the end surface of the easy-to-weld substrate and the end surface of the annular groove.

16. A manufacturing process for wear-resistant parts, characterized in that: The manufacturing process of the wear-resistant part is used to manufacture the wear-resistant part according to any one of claims 1 to 11, and the manufacturing process comprises: Step S100: machining an annular groove on the outer side wall of the wearable body; Step S200: cutting the easy-to-weld substrate into two semicircular rings; Step S300: placing two semicircular rings into the annular groove, and clamping and positioning the two semicircular rings with auxiliary fixing clamps; Step S400: welding a wear-resistant layer on the outer side walls of the two semicircular rings, and making the wear-resistant layer avoid the butt joint surfaces of the two semicircular rings; Step S500: welding and fixing the butt joint surfaces of the two semicircular rings; Step S600: remove the auxiliary fixing clip.

17. A drill pipe, characterized in that: The drill pipe comprises the wear-resistant part according to any one of claims 1 to 11.

18. A drill string, characterized in that: The drill string comprises the drill pipe of claim 17.

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