Sidewall coring structure directly driven by an electric motor
AssigneesChina National Offshore Oil Corporation, China Oilfield Services Limited
InventorsYongren Feng, Jibin Zou, Jian Li
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Abstract
The present application provides a sidewall coring structure directly driven by an electric motor comprising a drill bit, an electric motor and a speed reducer, the electric motor and the speed reducer are an integrated structure and the drill bit is directly connected to an output of the speed reducer. The coring structure directly drives the drill bit through an integrated structure of the speed reducer and the electric motor; its transmission efficiency is greatly improved, meanwhile the coring structure is more simplified, with improved reliability, easier maintenance and reduced maintenance cost.
Claims15
A sidewall coring structure comprising a drill bit, an electric motor and a speed reducer, wherein the electric motor and the speed reducer are an integrated structure and the drill bit is directly connected to an output of the speed reducer, wherein housings of the electric motor and the speed reducer are separable, both of which are sealedly and fixedly connected, and an input gear of the speed reducer is directly mounted on an output shaft of the electric motor,
- wherein the sidewall coring structure further comprises an auxiliary bracket and at least one pair of parallel sliding plates, the auxiliary bracket being disposed between the at least one pair of parallel sliding plates and connected with the speed reducer via a connecting plate,
- wherein a first sliding shaft and a rotating shaft hole are provided on the connecting plate, a second sliding shaft and a rotating shaft are symmetrically provided on both sides of the housing of the speed reducer, and wherein a first inclined chute and a second inclined chute are formed on the sliding plate, the first sliding shaft being sleeved within the first inclined chute, the second sliding shaft being sleeved within the second inclined chute, and the rotating shaft being sleeved within the rotating shaft hole of the connecting plate.
A sidewall coring structure comprising a drill bit, a drive device of drill bit and a frame, the drill bit connected to an output of the drive device of drill bit, wherein the sidewall coring structure further comprises a motion control mechanism of drill bit which is accommodated within the frame and the drive device of drill bit is accommodated within the motion control mechanism of drill bit, the motion control mechanism of drill bit is configured to drive the drive device of drill bit to achieve extending-retracting and turning motions,
- wherein the motion control mechanism of drill bit comprises an auxiliary bracket and at least one pair of parallel sliding plates, the drive device of drill bit is an integrated structure of a speed reducer and an electric motor, both the auxiliary bracket and the drive device of drill bit are disposed between the at least one pair of parallel sliding plates, and the auxiliary bracket and the drive device of drill bit are slidably connected by a connecting plate, and
- wherein the connecting plate is slidably connected to the sliding plate and is rotatably connected to the drive device of drill bit, a first sliding shaft and a rotating shaft hole are provided on the connecting plate, a second sliding shaft and a rotating shaft are provided on the drive device of drill bit, and wherein a first inclined chute and a second inclined chute are formed on the sliding plate, the first sliding shaft being sleeved within the first inclined chute, the second sliding shaft being sleeved within the second inclined chute, and the rotating shaft being sleeved within the rotating shaft hole.
Dependencies are inferred from the claim text.