Power assembly of full-hydraulic reverse circulation drilling machine

Abstract

The invention provides a power assembly of a full-hydraulic reverse circulation drilling machine. The power assembly comprises a residue discharge chamber, a reduction gearbox assembly, a mud pump assembly, a rotary connector subassembly, a shaft spacer, a spindle connecting rod, a main fastener, an assembly connecting plate subassembly, a spindle driving clamp slip and a stop pin subassembly. The power assembly has the advantages that two hydraulic motors are serially connected with each other or are connected with each other in parallel, so that two different rotational speeds can be implemented by a reduction gearbox, and the power assembly is adaptive to operation under different geological and aperture conditions; torque of drilling pipes can be changed along with change of the geological conditions of operation, and accordingly energy can be saved; a hydraulic system can be regulated, so that overload protection effects can be realized for drilling machine operation; the vacuumizing time can be shortened owing to sealing structures of the reduction gearbox and mud pumps; the hydraulic motors can be controlled by the hydraulic system and can drive the reduction gearbox with gears to directly drive drilling tools to rotate; flow of hydraulic pumps can be regulated, so that the rotational speeds and the lifting speeds of the drilling pipes and flow parameters of the mud pumps can be regulated; the power assembly is provided with rotary connector mechanisms, so that hole drilling operation can be implemented by impact drill bits or drill bits with rotor wings, and hole drilling operation on the scales larger than 200 meters can be implemented.

Description

technical field [0001] The invention belongs to the technical field of drilling rigs, and relates to a power assembly of a full hydraulic reverse circulation drilling rig. Background technique [0002] At present, in a reverse circulation drilling rig, the power assembly includes a gearbox, a mud pump, a slag discharge chamber, a main shaft adapter, and a main buckle; the gearbox and the mud pump are the core parts of the drilling rig, and are driven by a motor. [0003] The deficiencies are: [0004] 1. The reducer is driven by a motor. The input speed is high, the noise is large, and the work is not stable. Usually there is only one speed. To achieve different speeds, one is to use a frequency converter for speed regulation, but the driving power changes; that is, when the speed decreases , the power decreases, the torque of the drill pipe will not increase; the second is to add gears and shift forks and other components in the reduction box, which makes the structure of...

AI Technical Summary

Problems solved by technology

[0004] 1. The reducer is driven by a motor, the input speed is high, the noise is large, and the work is not stable. Usually there is only one speed. To achieve different speeds, one is to use a frequency converter The speed is adjusted, but the driving power changes; that is, when the speed decreases, the power decreases, and the torque of the drill pipe does not increase; the second is to add gears and shift forks and other components in the reduction box to make the structure of the reduction box complicated; The torque of the drill pipe cannot be changed with the change of working conditions;

[0005] 2. The reduction box is driven by a motor, and the input speed is high. To achieve the reasonable speed of the drill pipe during the drilling rig operation, the reduction box usually adopts three-stage gear reduction, and the structure changes. complicated

[0006] 3. Since the rotation speed of the mud pump remains unchanged, the flow rate and head cannot be adjusted, and the slag discharge capacity is insufficient when the drilling depth exceeds 100 meters;

[0007] 4. Since the mud pump and the gearbox are sealed with traditional V-shaped rubber seal or packing seal, the sealing effect is poor. When the drilling depth is more than 100mm, the mud pump Insufficient suction, the slag discharge capacity is significantly reduced, and the drilling rig is difficult to operate;

[0008] 5. The valve sealing surface of the slag discharge chamber is perpendicular to the ground in a natural state, and the sealing effect is poor. When the drill pipe is connected to the hole operation, before the mud pump is started, the time required for the vacuum pump to vacuum the mud pump suction mud pipe will be longer, thus increasing the auxiliary time of the operation

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