Drill rod coated with a film of polyphenylene sulfide

Abstract

Drill rod coated with a polyphenylene sulfide (PPS) film, comprising a rod body (1), wherein a first connecting head (2) is provided at a lower end of the rod body (1) and a second connecting head (3) is provided at a lower end of the first connecting head (2); wherein a sleeve (4) is arranged at an upper end of the rod body (1), which is movable in the longitudinal direction of the rod body (1) and is connected to the first connecting head (2) via a thread; wherein a connecting opening (12) is further formed at the upper end of the rod body (1) and the second connecting head (3) is coupled to the connecting opening (12) via insertion therein; wherein the cross-section of the second connecting head (3) is polygonal.

Description

Summary

[0001] The utility model relates to a boring bar coated with a polyphenylene sulfide (PPS) film and pertains to the technical field of boring bars. The boring bar is intended to solve the prior art problem of a single connection type and low reliability. The boring bar comprises a rod body with a first connector or connecting head at its lower end, and a second connector or connecting head at the lower end of the first connector or connecting head. A sleeve is provided at the upper end of the rod body, which is movable along the length of the rod body and connected to the first connecting head via a thread. Furthermore, a connecting opening is formed at the upper end of the rod body into which the second connecting head can be inserted.The polygonal plug connection between the second connecting head and the connecting opening, combined with the threaded engagement of the sleeve with the first connecting head, creates a dual connection type. This ensures that the drill rods are reliably connected without twisting, thus significantly improving the reliability of the drill rod in complex working environments. Field of invention

[0002] The present utility model relates to the technical field of drill rods and in particular a drill rod coated with a polyphenylene sulfide (PPS) film. background

[0003] In the field of drilling technology, the performance and quality of drill rods directly influence the efficiency, safety, and cost of drilling operations. Conventional drill rods typically use a single threaded connection. Although such threaded connections are relatively easy to handle, they tend to rotate, loosen, or even detach under complex geological conditions or high external forces. Such failures can lead to interruptions in drilling operations, resulting in lost time, potential damage to drilling equipment, and increased construction costs. Therefore, there is a need for drill rods with improved connection reliability and durability. Summary of the invention Task

[0004] In view of the disadvantages of the prior art, the objective of the present utility model is to provide a drill rod with a polyphenylene sulfide (PPS) foil coating in order to solve the technical problems of a single type of connection and low connection reliability in conventional drill rods. Technical solution

[0005] To solve the aforementioned technical problems, this utility model provides a boring bar with a PPS film, comprising a rod body. A first connector or connecting head is provided at one lower end of the rod body, and a second connector or connecting head is provided at the lower end of the first connector or connecting head. A sleeve is provided at the upper end of the rod body, which is movable along the longitudinal direction of the rod body and connected to the first connecting head via a thread. Furthermore, a connecting opening is formed at the upper end of the rod body into which the second connecting head is inserted, the cross-section of which is polygonal.

[0006] A projection is preferably provided at an upper end of the side wall of the rod body, wherein the lower end of the socket tube is in sliding contact with the side wall of the rod body, and wherein the projection prevents the socket tube from detaching from the upper end of the rod body.

[0007] The sleeve pipe preferably has a threaded area for connection, wherein the extension surrounds the rod body in a ring shape and is provided in the threaded area, and wherein the extension is movable within the threaded area in the longitudinal direction of the rod body.

[0008] Preferably, the cross-sectional radius of the first connecting head is larger than that of the rod body, wherein the threaded section for connection has an internal thread and the surface of the first connecting head is provided with an external thread. The socket pipe and the first connecting head are threaded together via the internal thread of the threaded section and the external thread of the first connecting head. The depth of the threaded section is equal to the sum of the thickness of the extension and the length of the second connecting head.

[0009] A recess is preferably provided on an outer wall of the socket pipe, wherein at least one pair of recesses is arranged symmetrically.

[0010] Preferably a first chamfer is provided at a corner of the lower end of the first connecting head, a second chamfer at a corner of the lower end of the second connecting head, a third chamfer at an outer edge of the lower end of the sleeve, and a fourth chamfer at an outer edge of the upper end of the sleeve.

[0011] The third chamfer is preferably a beveled chamfer, wherein the first chamfer, the second chamfer and the fourth chamfer are arc-shaped chamfers.

[0012] A PPS film is preferably wound onto a surface of the rod body, wherein the PPS film is wound helically along the longitudinal direction of the rod body and is attached with adhesive. Beneficial effects

[0013] Compared to the prior art, the present utility model has the following advantages: The utility model achieves a dual connection type through the polygonal plug connection between the second connecting head and the connecting opening, as well as the threaded connection between the socket pipe and the first connecting head. This design ensures that the drill rods do not twist relatively during connection, while simultaneously guaranteeing a firm connection, thereby significantly improving the reliability of the drill rod in complex working environments.

[0014] In the present utility model, the PPS film applied or wound onto the surface of the drill rod exhibits excellent resistance to high temperatures and chemical corrosion, thus effectively protecting the drill rod from various harsh environmental conditions during operation. Simultaneously, the formation of chamfers on the components reduces stress concentrations, prevents edge damage, extends the service life of the drill rod, and lowers operating costs. Brief description of the characters

[0015] To illustrate the technical solutions of the embodiments of the present application or the prior art more clearly, the drawings necessary for describing the embodiments or the prior art are briefly explained below. It is clear that the drawings described below represent only some embodiments of the present application. Other drawings would be apparent to a person skilled in the art based on these drawings without any inventive effort. • Fig. Figure 1 is a schematic diagram of the overall structure of the present utility model; • Fig. Figure 2 is a schematic diagram showing the construction of the connection between the rod body, the first connecting head, the second connecting head and the socket pipe of the present utility model; • Fig. Figure 3 is a front view showing the connection between the rod body, the first connecting head, the second connecting head and the socket pipe of the present utility model; • Fig. Figure 4 is a sectional view showing the connection between the rod body, the first connecting head, the second connecting head and the socket pipe of the present utility model. Reference symbols in the drawings: 1 rod body; 2 first connecting head; 3 second connecting head; 4 sleeves; 5. In-depth study; 6 first phase; 7 second phase; 8 third phase; 9 fourth phase; 10 threaded chambers; 11th Federation; 12 Connection opening. Detailed description of the embodiments

[0016] The technical solutions in the embodiments of this utility model are described clearly and completely below with reference to the drawings. It is clear that the described embodiments represent only some embodiments of this utility model and not all embodiments. Based on the embodiments of this utility model, all other embodiments that a person skilled in the art can arrive at without inventive effort fall within the scope of protection of this utility model.

[0017] One embodiment of the present utility model provides a drill rod with a polyphenylene sulfide (PPS) coating. As in the Fig. As shown in Figures 1 to 4, the drill rod comprises a rod body (1), a first connecting head (2), a second connecting head (3) and a socket or socket pipe (4).

[0018] In this embodiment, a PPS film is applied or wound onto the surface of the rod body (1). The film is wound helically along the longitudinal direction of the rod body (1) and attached to the surface of the rod body (1) by adhesive bonding. The PPS film exhibits excellent resistance to high temperatures and chemical corrosion, thereby effectively protecting the rod body (1) and extending the service life of the drill rod.

[0019] Furthermore, in this embodiment, the first connecting head (2) is arranged at the lower end of the rod body (1), its cross-sectional radius being larger than that of the rod body (1). This design allows the first connecting head (2) to provide a larger contact area when connected to external devices or other drill rods, thereby increasing the connection stability. A first chamfer (6), designed as an arcuate or circular chamfer, is provided at the corner of the lower end of the first connecting head (2).

[0020] Furthermore, in this embodiment, the second connecting head (3) is arranged at the lower end of the first connecting head (2) and has a polygonal cross-section, which can, in particular, assume the shape of a hexagon or another conventional shape. The second connecting head (3) is inserted into the connecting opening (12) formed at the upper end of the rod body (1). Such a polygonal connection design ensures that the second connecting head (3) does not rotate relative to the connecting opening (12) during the connection process, thereby increasing the reliability of the connection. A second chamfer (7) is provided at the corner of the lower end of the second connecting head (3), which is also formed as an arcuate or circular chamfer. This facilitates the insertion of the second connecting head (3) into the connecting opening (12), protects the edges, and reduces the occurrence of stress concentrations.

[0021] Furthermore, in this embodiment, the sleeve or sleeve tube (4) is arranged at the upper end of the rod body (1) and is movable in the longitudinal direction of the rod body (1). The lower end of the sleeve (4) rests slidably against the side wall of the rod body (1). A projection (11) is provided at the upper end of the side wall of the rod body (1). The projection (11) surrounds the rod body (1) in an annular manner and is arranged in the threaded area (10) of the sleeve (4). The projection (11) is movable in the threaded area (10) in the longitudinal direction of the rod body (1) and also serves to prevent the sleeve (4) from detaching from the upper end of the rod body (1). The threaded area (10) is provided with an internal thread, while the surface of the first connecting head (2) has an external thread.The sleeve (4) and the first connecting head (2) engage via the internal thread of the threaded section (10) and the external thread on the surface of the first connecting head (2). This threaded connection facilitates the assembly and disassembly of the boring bar while simultaneously ensuring a secure connection. The depth of the threaded chamber (10) corresponds to the sum of the thickness of the extension (11) and the length of the second connecting head (3). These dimensions ensure a precise fit between the sleeve (4) and the first connecting head (2), preventing an insufficient or faulty connection.

[0022] Furthermore, recesses (5) are provided on the outer wall of the sleeve (4), with at least one pair arranged symmetrically. The recesses (5) facilitate operation by allowing the sleeve (4) to be gripped and rotated with a tool, thus making it easier to screw the sleeve (4) onto or off the first connecting head (2). A third chamfer (8), designed as a beveled chamfer, is provided on the outer edge of the lower end of the sleeve (4), while a fourth chamfer (9), designed as an arcuate or rounded chamfer, is provided on the outer edge of the upper end of the sleeve (4). These chamfers serve to protect the edges, reduce the occurrence of stress concentrations, lower drilling resistance, and also improve the external appearance of the drill rod. How it works

[0023] When used, if a connection of drill rods is required, the second connecting head (3) of one drill rod is inserted into the connecting opening (12) at the upper end of another drill rod. Since the second connecting head (3) is polygonal, relative rotation between the two drill rods is prevented after insertion into the connecting opening (12). Subsequently, the sleeve (4) is rotated by engaging a tool in the recesses (5), causing the threaded section (10) inside the sleeve (4) to engage with the external thread provided on the surface of the first connecting head (2). As the sleeve (4) continues to rotate, it gradually moves downwards until it rests firmly against the projection (11) on the side wall of the rod body (1). At this point, the two drill rods are reliably connected.

[0024] During drilling operations, the PPS film on the surface of the drill rod body (1) protects the rod body. Due to its resistance to high temperatures and chemical corrosion, the PPS film prevents the drill rod body (1) from being damaged by heat or chemical substances in the working environment, thus extending the service life of the drill rod. At the same time, the chamfers on the components reduce the occurrence of stress concentrations, prevent edge damage under external loads, and ensure the normal operation of the drill rod.

[0025] All technical features of this embodiment can be freely combined as required.

[0026] Finally, it should be noted that the embodiments described above represent only preferred examples of the present utility model and are not intended to limit the utility model. Although the present utility model has been described in detail with reference to the embodiments described above, a person skilled in the art may modify the technical solutions described in the above embodiments or replace individual technical features with equivalent ones. All such modifications, equivalent replacements, or improvements made in the spirit and within the principle of the present utility model fall within the scope of protection of the present utility model.

Claims

[1] Drill rod coated with a polyphenylene sulfide (PPS) film, comprising a rod body (1), wherein a first connecting head (2) is provided at a lower end of the rod body (1) and a second connecting head (3) is provided at a lower end of the first connecting head (2); wherein a sleeve (4) is arranged at an upper end of the rod body (1), which is movable in the longitudinal direction of the rod body (1) and is connected to the first connecting head (2) via a thread; wherein a connecting opening (12) is further formed at the upper end of the rod body (1) and the second connecting head (3) is coupled to the connecting opening (12) via insertion therein; wherein the cross-section of the second connecting head (3) is polygonal. [2] Drill rod coated with a polyphenylene sulfide (PPS) film according to claim 1, wherein a projection (11) is provided at an upper end of the side wall of the rod body (1), wherein a lower end of the sleeve (4) slides against the side wall of the rod body (1), and wherein the projection (11) prevents the sleeve (4) from detaching from the upper end of the rod body (1). [3] Drill rod coated with a polyphenylene sulfide (PPS) film according to claim 2, wherein the sleeve (4) has an inner threaded area (10), wherein the projection (11) surrounds the rod body (1) in an annular manner and is arranged in the threaded area (10), and wherein the projection (11) is movable within the threaded area (10) in the longitudinal direction of the rod body (1). [4] A drill rod coated with a polyphenylene sulfide (PPS) film according to claim 3, wherein a cross-sectional radius of the first connecting head (2) is larger than that of the rod body (1), wherein the threaded section (10) has an internal thread and wherein a surface of the first connecting head (2) has an external thread; wherein the sleeve (4) and the first connecting head (2) are threaded together via the internal thread of the threaded section (10) and the external thread of the first connecting head (2); and wherein a depth of the threaded section (10) is equal to the sum of a thickness of the projection (11) and a length of the second connecting head (3). [5] Drill rod coated with a polyphenylene sulfide (PPS) film according to claim 1, wherein a recess (5) is provided on an outer wall of the sleeve (4), wherein at least one pair of the recesses (5) is arranged symmetrically. [6] Drill rod coated with a polyphenylene sulfide (PPS) film according to claim 1, wherein a first chamfer (6) is formed at a corner of the lower end of the first connecting head (2), a second chamfer (7) is formed at a corner of the lower end of the second connecting head (3), a third chamfer (8) is formed at an outer edge of the lower end of the sleeve (4) and a fourth chamfer (9) is formed at an outer edge of the upper end of the sleeve (4). [7] Drill rod coated with a polyphenylene sulfide (PPS) film according to claim 6, wherein the third chamfer (8) is a chamfered chamfer and the first chamfer (6), the second chamfer (7) and the fourth chamfer (9) are round chamfers. [8] Drill rod coated with a polyphenylene sulfide (PPS) film according to claim 1, wherein a PPS film is wound onto a surface of the rod body (1), wherein the PPS film is wound helically along the longitudinal direction of the rod body (1) and is adhesively attached.

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