Reverse circulation drilling machine

Abstract

The utility model relates to the technical field of excavating drilling machines, in particular to a reverse circulation drilling machine which comprises a drilling machine advancing body, a power output device and a drilling rod. The power output device comprises a power head, an upper pump and a lower pump, the drilling machine advancing body is connected with the power head through a steel wire rope, the upper pump is installed above the power head through an upper pump fixing frame, the lower pump is arranged below the power head, the lower end of the power head is connected with an upper pump and lower pump connecting pipe, and the upper pump and lower pump connecting pipe is connected with the drilling machine advancing body. The end, away from the power head, of the upper and lower pump connecting pipe is connected with the lower pump, and the bottom end of the power output device is detachably connected with a drill rod. The drilling depth can be effectively increased, the circulation effect of the drilling machine can be effectively improved, and the drilling depth can be increased in the drilling process.

Description

Technical Field

[0001] The utility model relates to the technical field of excavation drills, in particular to a reverse circulation drill. Background Art

[0002] Rotary drilling rig is a kind of construction machinery widely used in geotechnical construction at home and abroad for hole-making operations. It plays a significant role in the foundation construction process of municipal construction, highway bridges, high-rise buildings, etc.

[0003] The existing reverse circulation drilling rig has a motor and a pump placed on the power head. The centrifugal pump is used to suck the mud from the wellbore. When drilling to a certain depth, the suction distance is reduced, the suction force is insufficient, the mud is pumped slowly, the drilling is also slow, or even the mud cannot be pumped out. The drilling depth is limited by the pump suction distance. When drilling to a deep layer, the drilling speed is slow, the time is long, and the energy consumption is high. The installation and disassembly is time-consuming and labor-intensive. The maintenance cost is high. The water flow area is small and it is easy to be blocked. Utility Model Content

[0004] (I) The utility model provides a reverse circulation drilling rig, which alleviates the technical problems of limited drilling depth and easy clogging in the prior art.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, an embodiment of the utility model provides a reverse circulation drilling rig, comprising a drilling rig travel body, a power output device and a drill rod;

[0007] The power output device includes a power head, an upper pump and a lower pump. The drilling rig travel body is connected to the power head through a wire rope. The upper pump is installed above the power head through an upper pump fixing frame. The lower pump is arranged below the power head. An upper and lower pump connecting pipe is connected to the lower end of the power head. One end of the upper and lower pump connecting pipe away from the power head is connected to the lower pump. The bottom end of the power output device is detachably connected to a drill rod.

[0008] Furthermore, the upper and lower pump connecting pipes are connected to the upper pump via a cylindrical connecting pipe.

[0009] Furthermore, the power head is provided with a driving sleeve, a lower pump outer cylinder is provided on the outer side of the lower pump, the driving sleeve is connected to one end of the cylinder connecting pipe, and the other end of the cylinder connecting pipe is connected to the lower pump outer cylinder.

[0010] Furthermore, one end of the outer cylinder of the lower pump away from the cylinder connecting pipe is connected to the lower flange.

[0011] Furthermore, the drill rod includes a drill rod connector, which is connected to the lower flange, and a drill bit is also connected to the lower end of the drill rod.

[0012] Furthermore, a first bearing is provided at the connection between the cylindrical connecting pipe and the driving sleeve, and a first oil seal and a first oil retaining ring are provided above the first bearing.

[0013] Furthermore, a second bearing is provided at the connection between the lower flange and the drill pipe connecting head, and a second oil seal and a second oil retaining ring are provided above the second bearing.

[0014] Furthermore, a bearing matching sleeve is provided on the upper and lower pump connecting pipes, and the bearing matching sleeve is connected to the first bearing for use.

[0015] Furthermore, a vacuum pump is provided below the lower pump.

[0016] Furthermore, the upper pump and the lower pump are two independent pumps connected via a connecting piece.

[0017] Beneficial effects of the utility model:

[0018] The utility model provides a reverse circulation drilling rig, comprising a drilling rig travel body, a power output device and a drill rod; the power output device comprises a power head, an upper pump and a lower pump, the drilling rig travel body is connected to the power head through a wire rope, the upper pump is installed above the power head through an upper pump fixing frame, the lower pump is arranged below the power head, an upper and lower pump connecting pipe is connected to the lower end of the power head, one end of the upper and lower pump connecting pipe away from the power head is connected to the lower pump, and the bottom end of the power output device is detachably connected to the drill rod. The utility model can effectively improve the drilling depth by the upper pump and the lower pump working at the same time after drilling to a certain depth, and the upper pump and the lower pump are connected by the upper and lower pump connecting pipes. The mud generated in the drilling process first enters through the bottom of the drill rod and then flows through the inner cavity of the lower pump, and then enters the upper pump from the lower pump through the upper and lower pump connecting pipes and is discharged to precipitate, thereby effectively improving the circulation effect of the drilling rig. During the drilling process, the power head can loosen the drill rod and rise, and then connect another drill rod to the drilling process to increase the drilling depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the overall structure of a reverse circulation drilling rig provided by an embodiment of the utility model;

[0021] Figure 2A schematic diagram of a sealing structure at a cylindrical connecting pipe of a reverse circulation drilling rig provided by an embodiment of the utility model;

[0022] Figure 3 A schematic diagram of a sealing structure at the lower flange of a reverse circulation drilling rig provided in an embodiment of the utility model;

[0023] Figure 4 A schematic diagram of a bearing matching sleeve of a reverse circulation drilling rig provided by an embodiment of the utility model;

[0024] Figure 5 A schematic diagram of an upper pump structure of a reverse circulation drilling rig provided in an embodiment of the utility model;

[0025] Figure 6 A schematic diagram of a lower pump structure of a reverse circulation drilling rig provided in an embodiment of the utility model;

[0026] Figure 7 A schematic diagram of the working cycle of a reverse circulation drilling rig provided in an embodiment of the utility model.

[0027] icon:

[0028] 1- Drilling rig travel body;

[0029] 2-power output device; 201-power head; 202-upper pump; 203-lower pump; 204-upper pump fixing frame; 205-upper and lower pump connecting pipes; 206-cylinder connecting pipe; 207-lower pump outer cylinder; 208-lower flange; 209-drill pipe connecting head; 210-first bearing; 211-first oil seal; 212 first oil retaining ring; 213-second bearing; 214-second oil seal; 215-second oil retaining ring; 216-bearing matching sleeve;

[0030] 3-drill rod; 301-drill bit;

[0031] 4-vacuum pump; 401-valve;

[0032] 5- Platform;

[0033] 6- Mud pool. DETAILED DESCRIPTION

[0034] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0037] like Figures 1 to 7 As shown, the utility model provides a reverse circulation drilling rig, including a drilling rig traveling body 1, a power output device 2 and a drill rod 3; the power output device 2 includes a power head 201, an upper pump 202 and a lower pump 203, the drilling rig traveling body 1 is connected to the power head 201 through a wire rope, the upper pump 202 is installed above the power head 201 through an upper pump fixing frame 204, the lower pump 203 is arranged below the power head 201, the lower end of the power head 201 is connected to an upper and lower pump connecting pipe 205, the upper and lower pump connecting pipes 205 are connected to the lower pump 203 at one end away from the power head 201, and the bottom end of the power output device 2 is detachably connected to the drill rod 3.

[0038] In this embodiment, after drilling to a certain depth, the upper pump 202 and the lower pump 203 work simultaneously, which can effectively increase the drilling depth, and the upper pump 202 and the lower pump 203 are connected by the upper and lower pump connecting pipes 205. The mud generated during the drilling process first enters from the bottom of the drill rod 3 and then flows through the inner cavity of the lower pump 203, and then enters the upper pump 202 from the lower pump 203 through the upper and lower pump connecting pipes 205 and is discharged to precipitate, thereby effectively improving the circulation effect of the drilling rig. During the drilling process, the power head 201 can loosen the drill rod 3 and rise, and then connect another drill rod 3 to the drilling process to increase the drilling depth.

[0039] The drilling rig traveling body 1 is connected to the power head 201 through a steel wire rope, the upper pump 202 is installed above the power head 201 through an upper pump fixing bracket 204, and the lower pump 203 is arranged below the power head 201. The upper and lower pumps 203 are connected through an upper and lower pump connecting pipe 205, so that the effect of controlling the rise or fall of the power output device 2 can be achieved by retracting and releasing the steel wire rope on the drilling rig traveling body 1.

[0040] Among them, the drilling rig travel body 1 is a public technology, so it will not be described in detail.

[0041] According to an embodiment provided by the utility model, Figure 1 As shown, the upper and lower pump connecting pipes 205 are connected to the upper pump 202 through a cylindrical connecting pipe 206.

[0042] Furthermore, the power head 201 is provided with a driving sleeve, and a lower pump outer cylinder 207 is provided on the outer side of the lower pump 203 . The driving sleeve is connected to one end of the cylinder connecting tube 206 , and the other end of the cylinder connecting tube 206 is connected to the lower pump outer cylinder 207 .

[0043] In this embodiment, a cylindrical connecting pipe 206 is further provided on the outside of the upper and lower pump connecting pipes 205, and the cylindrical connecting pipe 206 is used to connect the upper and lower pump connecting pipes 205 with the upper pump 202. The driving sleeve at the lower end of the power head 201 is fixedly connected to one end of the cylindrical connecting pipe 206, so that the upper and lower pump connecting pipes 205 are connected to the power head 201. Since the upper pump 202 is installed above the power head 201, the upper and lower pump connecting pipes 205 are also connected to the upper pump 202.

[0044] The other end of the circular tube connecting pipe is directly fixedly connected to the lower pump outer cylinder 207 outside the lower pump 203, so that the upper pump 202, the lower pump 203, the upper and lower pump connecting pipes 205 and the power head 201 can be connected into a reverse circulation whole for use.

[0045] According to an embodiment provided by the utility model, Figure 1 As shown, one end of the lower pump outer cylinder 207 away from the cylinder connecting pipe 206 is connected to the lower flange 208.

[0046] Furthermore, the drill rod 3 includes a drill rod connector 209 , which is connected to the lower flange 208 , and a drill bit 301 is also connected to the lower end of the drill rod 3 .

[0047] In this embodiment, one end of the lower pump outer cylinder 207 away from the cylinder connecting pipe 206 is connected to the drill rod 3 through a drill rod connecting head 209, and a lower flange 208 is also installed between the lower pump outer cylinder 207 and the drill rod connecting head 209, so that the lower pump outer cylinder 207 and the drill rod connecting head 209 can be stably connected.

[0048] A drill bit 301 is provided below the drill rod 3. During drilling, the generated mud first enters from the pipe opening below the drill bit 301, then passes through the drill rod 3 and enters the inner cavity of the lower pump 203, and then enters the upper pump 202 through the connecting rods of the upper and lower pumps 203, and is discharged from the water outlet of the upper pump 202 for sedimentation.

[0049] According to an embodiment provided by the utility model, Figure 2 As shown, a first bearing 210 is provided at the connection between the cylindrical connecting pipe 206 and the driving sleeve, and a first oil seal 211 and a first oil retaining ring 212 are provided above the first bearing 210 .

[0050] In this embodiment, a first bearing 210 is arranged at the connection between the cylindrical connecting tube 206 and the driving sleeve, and a first oil seal 211 and a first oil retaining ring 212 are arranged above the first bearing 210 to increase the sealing, dustproof, water vapor-proof and oil-proof effects, while also protecting the internal key components from being invaded by external substances such as dust, impurities and water vapor.

[0051] Among them, optionally, sealing and coaxiality can also be ensured by other means, such as using a light-contact rubber cover seal, etc., the purpose of which does not deviate from the design concept of the utility model and should belong to the protection scope of the utility model.

[0052] According to an embodiment provided by the utility model, Figure 3 As shown, a second bearing 213 is provided at the connection between the lower flange 208 and the drill pipe connector 209 , and a second oil seal 214 and a second oil retaining ring 215 are provided above the second bearing 213 .

[0053] In this embodiment, a second bearing 213 is arranged at the connection between the lower flange 208 and the drill pipe connector 209, and a second oil seal 214 and a second oil retaining ring 215 are arranged above the second bearing 213 to increase the sealing, dustproof, water vapor-proof and oil-proof effects, while also protecting the internal key components from being invaded by external substances such as dust, impurities and water vapor.

[0054] Among them, optionally, sealing and coaxiality can also be ensured by other means, such as using a light-contact rubber cover seal, etc., the purpose of which does not deviate from the design concept of the utility model and should belong to the protection scope of the utility model.

[0055] According to an embodiment provided by the utility model, Figure 4 As shown, a bearing matching sleeve 216 is provided on the upper and lower pump connecting pipes 205, and the bearing matching sleeve 216 is connected to the first bearing 210 for use.

[0056] In this embodiment, a bearing matching sleeve 216 is provided on the upper and lower pump connecting pipes 205, wherein preferably, an oil pipe is also provided on the upper and lower pump connecting pipes 205, and is tightly matched with the first bearing 210 through the bearing connecting sleeve to increase the sealing effect.

[0057] According to an embodiment provided by the utility model, Figure 1 and Figure 7 As shown, a vacuum pump 4 is provided below the lower pump 203 .

[0058] In this embodiment, since the lower pump 203 cannot be submerged above the water surface at the beginning of drilling, a vacuum pump 4 is arranged below the lower pump 203. At the beginning, the vacuum pump 4 works to extract the mud generated during the drilling process. When a certain depth is reached, the lower pump 203 can start working, close the valve 401, and the vacuum pump 4 stops extracting.

[0059] According to an embodiment provided by the utility model, Figure 5 and Figure 6 As shown, the upper pump 202 and the lower pump 203 are two independent pumps connected via a connecting piece.

[0060] In this embodiment, the upper pump 202 and the lower pump 203 are two separate pumps connected by connecting parts, and a reducer is installed on the pump. The four pumps are connected to extract at the same time, which can effectively improve the drilling depth and drilling efficiency.

[0061] Preferably, the connecting piece is made of pipe and flange for connection.

[0062] like Figure 7As shown, when the reverse circulation drilling rig provided in this embodiment is working, the drill bit 301 is first placed on the platform 5, and the platform 5 is connected to the bottom of the mast. Optionally, two door panels are provided on the platform 5 for fixing the drill rod 3 and the drill bit 301. After the power head 201 is lowered to a suitable position, the drill rod 3 is installed above the drill bit 301, wherein, preferably, the drill rod 3 and the drill bit 301 are connected by threads, and the power head 201 is rotated forward to tighten the threads. A corresponding slot is provided above the drill rod 3 and the drill rod connector 209. After the upper end of the drill rod 3 enters the drill rod connector 209, the power head 201 rotates to achieve connection. After the connection is completed, the door panel is opened, the drill bit 301 is lowered, and drilling begins, and the cycle begins. Since the lower pump 203 cannot be submerged above the water surface at the beginning of drilling, the vacuum pump 4 works at the beginning to extract mud. After reaching a certain depth, the lower pump 203 starts to work, the valve 401 is closed, and the vacuum pump 4 stops working. The mud first enters through the pipe opening below the drill bit 301, passes through the drill rod 3, enters the inner cavity of the lower pump 203, and then flows upward from the lower pump 203 through the upper and lower pump connecting pipes 205 to the upper pump 202, and flows from the water outlet A of the upper pump 202 to B through the hose and enters the mud pool 6. After entering the mud pool 6, the mud begins to settle, and large particles settle to the mud pool 6 and are lowered. The precipitated water and small particles flow back to the hole from C to D through the pipeline, and the cycle repeats. After drilling to a certain depth, the door panel is closed, the power head 201 is reversed, the drill rod connector 209 releases the drill rod 3, the power head 201 rises, and another drill rod 3 is connected. The reciprocating operation is carried out to achieve the drilling depth. After drilling to a certain depth, the upper pump 202 and the lower pump 203 work at the same time, and the upper pump 202 and the lower pump 203 are both connected by two independent pumps, which greatly increases the drilling depth. After the drilling is completed, the power head 201 rises and the drill rod 3 is disassembled. The disassembly method of the drill rod 3 is opposite to the installation method.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reverse circulation drilling rig, characterized in that: It comprises a drilling rig travelling body (1), a power output device (2) and a drilling rod (3); The power output device (2) comprises a power head (201), an upper pump (202) and a lower pump (203); the drilling rig traveling body (1) is connected to the power head (201) via a steel wire rope; the upper pump (202) is installed above the power head (201) via an upper pump fixing frame (204); the lower pump (203) is arranged below the power head (201); an upper and lower pump connecting pipe (205) is connected to the lower pump (203) at the lower end of the power head (201); one end of the upper and lower pump connecting pipe (205) away from the power head (201) is connected to the lower pump (203); and the bottom end of the power output device (2) is detachably connected to a drill rod (3); The upper and lower pump connecting pipe (205) is connected to the upper pump (202) via a cylindrical connecting pipe (206); The power head (201) is provided with a driving sleeve, and a lower pump outer cylinder (207) is provided on the outer side of the lower pump (203); the driving sleeve is connected to one end of a cylinder connecting pipe (206), and the other end of the cylinder connecting pipe (206) is connected to the lower pump outer cylinder (207); A first bearing (210) is provided at the connection between the cylindrical connecting pipe (206) and the driving sleeve, and a first oil seal (211) and a first oil retaining ring (212) are provided above the first bearing (210).

2. A reverse circulation drilling rig according to claim 1, characterized in that: One end of the lower pump outer cylinder (207) away from the cylinder connecting pipe (206) is connected to the lower flange (208).

3. A reverse circulation drilling rig according to claim 2, characterized in that: The drill rod (3) comprises a drill rod connector (209), the drill rod connector (209) is connected to the lower flange (208), and the lower end of the drill rod (3) is also connected to a drill bit (301).

4. A reverse circulation drilling rig according to claim 3, characterized in that: A second bearing (213) is provided at the connection between the lower flange (208) and the drill pipe connector (209), and a second oil seal (214) and a second oil retaining ring (215) are provided above the second bearing (213).

5. A reverse circulation drilling rig according to claim 1, characterized in that: The upper and lower pump connecting pipes (205) are provided with a bearing matching sleeve (216), and the bearing matching sleeve (216) is connected to the first bearing (210) for use.

6. A reverse circulation drilling rig according to claim 1, characterized in that: A vacuum pump (4) is provided below the lower pump (203).

7. A reverse circulation drilling rig according to any one of claims 1 to 6, characterized in that: The upper pump (202) and the lower pump (203) are two independent pumps connected via a connecting piece.

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