| CPC E21B 7/068 (2013.01) [E21B 7/04 (2013.01); E21B 7/06 (2013.01); E21B 44/005 (2013.01)] | 4 Claims |
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1. An intelligent orientation device configured to achieve full rotation of a drill string, comprising a drive assembly, an executive assembly and an auxiliary assembly;
the drive assembly of the intelligent orientation device configured to achieve full rotation of a drill string comprises a battery pack cover plate, an upper O-shaped sealing ring, a lower O-shaped sealing ring, a lithium-ion battery pack, a main control board, a rotating motor, an insulating sleeve, and a motor cover plate:
wherein the battery pack cover plate is connected with the insulating sleeve by threads;
the upper O-shaped sealing ring is placed between the battery pack cover plate and the insulating sleeve, and the lower O-shaped sealing ring is placed between the battery pack cover plate and the motor cover plate so as to prevent drilling fluid infiltration;
the lithium-ion battery pack is fixed to the insulating sleeve through a fixing frame below the lithium-ion battery pack;
the main control board is fixed to the insulating sleeve through a clamp groove below the main control board;
the rotating motor is connected with the motor cover plate by bolts;
the insulating sleeve is interference fit with a mandrel housing,
the executive assembly of the intelligent orientation device configured to achieve full rotation of a drill string comprises two cylindrical roller bearings, a motor bearing cover, a coupling, a ball screw, a screw sleeve, a limit bolt, a push block shaft, and a push block:
wherein the two cylindrical roller bearings are respectively provided on an upper side and a lower side of the coupling;
the motor bearing cover is connected with the mandrel housing by bolts to achieve a circumferential fixation;
the coupling connects the rotating motor axially with the ball screw;
the screw sleeve is connected with the ball screw by threads;
the screw sleeve is connected with the push block shaft by bolts;
the limit bolt is connected with the ball screw by threads;
the push block shaft is fixed radially with the push block by an inclined dovetail groove structure,
the auxiliary assembly of the intelligent orientation device configured to achieve full rotation of a drill string comprises a side runner, an anti-drop upper joint, a roller housing, the mandrel housing, a side flow channel, and an anti-drop lower joint,
wherein the side runner is configured to divert drilling fluid away from the drive assembly and the executive assembly,
the roller housing is connected to the mandrel housing,
the anti-drop upper joint and the anti-drop lower joint are respectively connected to the mandrel housing by threads,
the motor bearing cover is connected to the mandrel housing by threads, thus, the anti-drop upper joint, the motor bearing cover, the mandrel housing, and the anti-drop lower joint maintain the same motion state;
the lithium-ion battery pack, the main control board, the rotating motor, and the insulating sleeve of the drive assembly are fixed in circumferential direction;
during drilling operations, the battery pack cover plate, the O-shaped sealing ring, the lithium-ion battery pack, the main control board, the rotating motor, the insulating sleeve, and the motor cover plate always maintain the same motion state as the mandrel housing;
the anti-drop upper joint is provided with two 180° circumferential side runners, the mandrel housing is provided with the side flow channel, the side runner is communicated with the side flow channel to ensure that the drilling fluid is diverted from the side runner of the anti-drop upper joint to the side flow channel of the mandrel housing, and then converges back to a center of the drill string at the anti-drop lower joint; and
when a clutch controller needs to switch states during drilling operations, the push block is aligned with a notch of the roller housing, and the push block shaft smoothly pushes out and retracts the push block; at the same time, a guide groove is provided at the notch of the roller housing, and a chamfer is provided on a contact edge between the push block and the roller housing, thereby effectively avoiding a deviation of a rotation angle of the rotating motor due to small disturbances, which causes the push block to be unable to be smoothly pushed out and the rotating motor to be overloaded.
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