Resistance and friction reducing device for tight oil shale oil exploitation well drilling

Abstract

The utility model relates to the technical field of tight oil and shale oil exploitation, and discloses a resistance and friction reducing device for tight oil and shale oil exploitation well drilling, which comprises a shell, a resistance and friction reducing mechanism is arranged in the shell, the top of the shell is fixedly connected with a fixed seat, the fixed seat is internally in threaded connection with a drill bit base, and the drill bit base is in threaded connection with the drill bit base. Three supporting frames are fixedly connected to the end, away from the shell, of the drill bit base at equal intervals in a circumferential mode, drill bits are rotationally connected to the supporting frames, a spray head is arranged between every two adjacent supporting frames and fixedly installed on the drill bit base, and a conveying channel communicating with the spray heads is formed in the drill bit base. By arranging the resistance and friction reducing mechanism, supply and injection of lubricating liquid are accurately controlled, in the tight oil shale oil exploitation process, it is ensured that a layer of lubricating film is always kept between drilling equipment and the stratum, friction resistance in the drilling process can be effectively reduced in a continuous lubricating mode, and the drilling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tight oil shale oil exploitation, and more specifically to a drag and friction reducing device for tight oil shale oil exploitation drilling. Background Art

[0002] With the continuous growth of global energy demand and the gradual depletion of conventional oil and gas resources, tight oil shale oil, as an important non-traditional oil and gas resource, is gradually receiving widespread attention. Tight oil shale oil mainly exists in low-permeability, high-hardness shale formations. It is difficult to mine and requires advanced drilling technology for efficient mining. In the process of tight oil shale oil mining, drilling technology is a key link.

[0003] The shortcomings of the existing technology: Due to the particularity of shale formations, such as high formation hardness, large rock fragmentation, and complex formation structure, the drill rod faces greater resistance and friction when passing through the formation, which not only leads to low drilling efficiency and increased drilling costs, but may also cause damage to the drill rod and even cause drilling accidents. Therefore, it is necessary to design a drag and friction reduction device for tight oil shale oil extraction drilling. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a drag and friction reduction device for tight oil shale oil production drilling to solve the problems existing in the above-mentioned background technology.

[0005] The utility model provides the following technical solution: a drag and friction reduction device for drilling for tight shale oil exploitation, comprising a shell, a drag and friction reduction mechanism is arranged inside the shell, a fixing seat is fixedly connected to the top of the shell, a drill bit base is internally threadedly connected to the fixing seat, three support frames are fixedly connected to the drill bit base at an end away from the shell at equal intervals, a drill bit is rotatably connected to the support frame, a nozzle is arranged between two adjacent support frames, the nozzle is fixedly mounted on the drill bit base, and a conveying channel connected to the nozzle is opened inside the drill bit base.

[0006] Preferably, the drag and friction reduction mechanism includes a liquid storage tank, a lubrication pump and an injection assembly. The liquid storage tank is embedded in the shell, and a lubrication pump is provided at the bottom of the liquid storage tank. The lubrication pump and the liquid storage tank are connected by a pipeline. There are several injection assemblies, and the several injection assemblies are all arranged in the shell.

[0007] Preferably, a plurality of connecting pipes are embedded in the shell at equal intervals, the connecting pipes are connected to the lubrication pump through pipelines, a plurality of assembly grooves are opened on the outer wall of the shell at equal intervals on the circumference, the assembly grooves are adapted to the connecting pipes, and an injection assembly is rotatably connected to the connecting pipes.

[0008] Preferably, the injection assembly comprises a drag reduction wheel, and the drag reduction wheel is rotatably connected to bearings on both left and right sides, and the bearings are fixedly connected to the connecting pipe via a tightening sleeve.

[0009] Preferably, a plurality of nozzles are provided on the drag reduction wheel at equal intervals, and the nozzles are connected to the connecting pipe.

[0010] Preferably, a fixing cylinder is fixedly connected to the bottom of the shell, a lubrication pump is fixedly installed in the fixing cylinder, a connecting seat is fixedly connected to the bottom of the fixing cylinder, and a connecting flange is fixedly connected to the bottom of the connecting seat.

[0011] Technical effects and advantages of the utility model:

[0012] 1. The utility model is provided with a drag and friction reduction mechanism to accurately control the supply and injection of lubricating fluid, as well as the stable rotation and axial movement of the drag reduction wheel, thereby achieving the purpose of reducing friction resistance and improving drilling efficiency during the drilling process, fully considering the needs of actual drilling operations, and providing strong support for efficient and safe dense shale oil exploitation.

[0013] 2. The utility model is provided with a spray assembly. During the tight oil shale oil exploitation process, as the drag reduction wheel continues to rotate, the nozzle will continuously spray lubricating liquid to ensure that a lubricating film is always maintained between the drilling equipment and the formation. This continuous lubrication method can effectively reduce the friction resistance during the drilling process, improve the drilling efficiency, reduce the wear and energy consumption of the drill bit, and increase the drilling speed of the drill bit. In addition, the lubricating liquid can also cool the drill bit and remove drill cuttings, further improving the drilling conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the main cross-sectional structure of the utility model.

[0016] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0017] Figure 4 for Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0018] Figure 5 It is a structural schematic diagram of the injection assembly in the utility model.

[0019] The accompanying drawings are marked as follows: 1. Shell; 101. Assembly groove; 2. Drag reduction and friction reduction mechanism; 201. Liquid storage tank; 202. Lubrication pump; 203. Spray assembly; 2031. Drag reduction wheel; 2032. Bearing; 2033. Nozzle; 3. Fixed seat; 4. Drill base; 5. Support frame; 6. Drill; 7. Spray head; 8. Delivery channel; 9. Connecting pipe; 10. Fixed cylinder; 11. Connecting seat; 12. Connecting flange. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The utility model involves a drag and friction reduction device for tight oil shale oil production and drilling, and is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0021] The utility model provides a drag and friction reduction device for drilling in tight oil shale oil production. Figure 1-5 As shown, it includes a shell 1, a drag and friction reduction mechanism 2 is arranged inside the shell 1, a fixing seat 3 is fixedly connected to the top of the shell 1, a drill base 4 is internally threadedly connected to the fixing seat 3, and three support frames 5 are fixedly connected to the drill base 4 at an evenly spaced circumference at one end away from the shell 1, a drill bit 6 is rotatably connected to the support frame 5, a nozzle 7 is arranged between two adjacent support frames 5, the nozzle 7 is fixedly mounted on the drill base 4, and a conveying channel 8 connected to the nozzle 7 is opened inside the drill base 4.

[0022] Specifically, the delivery channel 8 is connected to the lubrication pump 202 through a pipeline, and the liquid in the liquid storage tank 201 is delivered to the nozzle 7. The nozzle 7 reduces the friction between the drill bit 6 and the formation by spraying liquid. When the drill bit 6 drills in the formation, the nozzle 7 will spray liquid with a certain pressure and flow rate. These fluids form a lubricating film between the drill bit 6 and the formation, thereby reducing friction resistance. At the same time, the sprayed fluid can also cool the drill bit 6 and remove drill cuttings, which helps to improve drilling efficiency.

[0023] Furthermore, the drag and friction reduction mechanism 2 includes a liquid storage tank 201, a lubrication pump 202 and an injection assembly 203. The liquid storage tank 201 is embedded in the housing 1. The lubrication pump 202 is arranged at the bottom of the liquid storage tank 201. The lubrication pump 202 is connected to the liquid storage tank 201 through a pipeline. There are a plurality of injection assemblies 203, and the plurality of injection assemblies 203 are arranged in the housing 1. The liquid storage tank 201 stores a proper amount of lubricating liquid. When the lubrication pump 202 is started, it draws lubricating liquid from the liquid storage tank 201 through the pipeline. In this process, the lubrication pump 20 The control unit 202 will monitor the liquid level of the liquid storage tank 201 to ensure that the lubricating fluid is always maintained at an appropriate level to avoid problems caused by too low or too high a liquid level. Next, the lubrication pump 202 will transport the sucked lubricating fluid to the connecting pipe 9 and the injection assembly 203 through a pipeline. After receiving the lubricating fluid, these injection assemblies 203 will spray it at a certain pressure and flow rate to the contact part between the drill pipe and the formation to form a lubricating film. This lubricating film can significantly reduce the friction resistance between the drill pipe and the formation, thereby improving the drilling efficiency and reducing the wear and energy consumption of the drill pipe.

[0024] Furthermore, a plurality of connecting pipes 9 are embedded at equal intervals in the shell 1, and the connecting pipes 9 are connected to the lubrication pump 202 through pipelines. A plurality of assembly grooves 101 are opened at equal intervals on the outer wall of the shell 1, and the assembly grooves 101 are adapted to the connecting pipes 9. The connecting pipes 9 are rotatably connected to the injection assemblies 203. When the lubrication pump 202 starts working, it will generate a certain pressure to push the lubricating fluid to flow in the pipeline. As the lubricating fluid flows, it will be transported to the connecting pipes 9 and then transported to each injection assembly 203 by the connecting pipes 9.

[0025] Furthermore, the injection assembly 203 includes a drag reduction wheel 2031, which is rotatably connected to bearings 2032 on both sides of the left and right sides. The bearings 2032 are fixedly connected to the connecting pipe 9 through a tightening sleeve. The drag reduction wheel 2031 is connected to the connecting pipe 9 through the bearing 2032 by using the tightening sleeve, which not only can realize the normal rotation of the drag reduction wheel 2031 on the connecting pipe 9, but also can ensure the stability and reliability of the rotation, thereby improving the working efficiency and service life of the entire device.

[0026] Furthermore, a plurality of nozzles 2033 are provided at equal intervals on the drag reduction wheel 2031, and the nozzles 2033 are connected to the connecting pipe 9. First, the lubricating liquid is transported from the liquid storage tank 201 to the inside of the drag reduction wheel 2031 through the pipeline. As the drag reduction wheel 2031 continues to rotate, the nozzles 2033 will continuously spray the lubricating liquid to ensure that a layer of lubricating film is always maintained between the drill pipe and the formation, which can effectively reduce the friction resistance during the drilling process and improve the drilling efficiency.

[0027] Furthermore, a fixed cylinder 10 is fixedly connected to the bottom of the shell 1, a lubrication pump 202 is fixedly installed in the fixed cylinder 10, a connecting seat 11 is fixedly connected to the bottom of the fixed cylinder 10, and a connecting flange 12 is fixedly connected to the bottom of the connecting seat 11. The drag reduction and friction reduction device can be fixedly connected to the drilling equipment through the connecting flange 12, so that it can provide stable drag reduction and friction reduction functions during the exploitation of dense oil shale.

[0028] The working principle of the utility model is as follows: when drilling is in progress, the drill bit 6 rotates and extends to the inside of the shale formation, the delivery channel 8 is connected to the lubrication pump 202 through a pipeline, and the liquid in the liquid storage tank 201 is delivered to the nozzle 7. When the drill bit 6 drills in the formation, the nozzle 7 will spray liquid with a certain pressure and flow rate to reduce the friction between the drill bit 6 and the formation. At the same time, the lubrication pump 202 will also transport the absorbed lubricating liquid to the connecting pipe 9 through a pipeline, and use the connecting pipe 9 to transport it to each injection assembly 203. The lubricating liquid is transported from the liquid storage tank 201 to the inside of the drag reduction wheel 2031 through a pipeline, and then the lubricating liquid is transported to the inside of the drag reduction wheel 2031. As the drag reduction wheel 2031 continues to rotate, the nozzles 2033 arranged at equal intervals on the drag reduction wheel 2031 spray the lubricating liquid at a certain pressure and flow rate onto the contact surface between the drill pipe and the formation, ensuring that a lubricating film is always maintained between the drill pipe and the formation, which can effectively reduce the friction resistance during the drilling process and improve the drilling efficiency. The presence of the lubricating film reduces the direct contact between the drill bit 6 and the formation, thereby reducing the friction resistance, which not only reduces the wear and energy consumption of the drill bit 6, but also increases the drilling speed of the drill bit 6. At the same time, the lubricating liquid can also cool the drill bit 6 and remove drill cuttings, further improving the drilling conditions.

[0029] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0030] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0031] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A drag and friction reduction device for tight shale oil production drilling, comprising a housing (1), characterized in that: The housing (1) is provided with a drag and friction reduction mechanism (2) inside. The top of the housing (1) is fixedly connected with a fixing seat (3). The fixing seat (3) is internally threadedly connected with a drill base (4). The end of the drill base (4) away from the housing (1) is fixedly connected with three support frames (5) at equal intervals in a circumferential manner. A drill (6) is rotatably connected to the support frame (5). A nozzle (7) is provided between two adjacent support frames (5). The nozzle (7) is fixedly mounted on the drill base (4). A conveying channel (8) communicating with the nozzle (7) is provided inside the drill base (4).

2. The device for reducing drag and friction for drilling of tight oil shale oil according to claim 1, characterized in that: The drag and friction reduction mechanism (2) comprises a liquid storage tank (201), a lubrication pump (202) and a spray assembly (203); the liquid storage tank (201) is embedded in a housing (1); a lubrication pump (202) is arranged at the bottom of the liquid storage tank (201); the lubrication pump (202) and the liquid storage tank (201) are connected via a pipeline; a plurality of spray assemblies (203) are arranged, and the plurality of spray assemblies (203) are all arranged in the housing (1).

3. The device for reducing drag and friction for drilling of tight oil shale oil according to claim 2, characterized in that: A plurality of connecting pipes (9) are embedded in the shell (1) at equal intervals, and the connecting pipes (9) are connected to the lubrication pump (202) through a pipeline. A plurality of assembly grooves (101) are opened at equal intervals on the outer wall of the shell (1), and the assembly grooves (101) are adapted to the connecting pipes (9). The connecting pipe (9) is rotatably connected to a spray assembly (203).

4. The device for reducing drag and friction for drilling of tight oil shale oil according to claim 3, characterized in that: The injection assembly (203) comprises a drag reduction wheel (2031), the drag reduction wheel (2031) is rotatably connected to bearings (2032) on both left and right sides, and the bearings (2032) are fixedly connected to the connecting pipe (9) via a tightening sleeve.

5. The device for reducing drag and friction for drilling of tight oil shale oil according to claim 4, characterized in that: A plurality of nozzles (2033) are provided at equal intervals on the drag reduction wheel (2031), and the nozzles (2033) are connected to the connecting pipe (9).

6. The device for reducing drag and friction for drilling of tight oil shale oil according to claim 5, characterized in that: The bottom of the housing (1) is fixedly connected to a fixed cylinder (10), a lubrication pump (202) is fixedly installed in the fixed cylinder (10), the bottom of the fixed cylinder (10) is fixedly connected to a connecting seat (11), and the bottom of the connecting seat (11) is fixedly connected to a connecting flange (12).

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