Push-the-bit rotary guiding device and application method thereof

A push-the-bit rotary guiding device, comprising:

• a mandrel having a central passage;
• a sleeve, which is rotatably sleeved outside the mandrel;
• a plurality of swing ribs, which are circumferentially arranged in an outer wall of the sleeve with an interval;
• an actuation mechanism, for controlling each swing rib to swing respectively;
• a plurality of detectors, which are circumferentially arranged in the outer wall of the sleeve with an interval and for detecting a distance to a well wall in real-time;
• and a controller, for determining whether the actuation mechanism is required to actuate the swing ribs to swing according to the detected distance.

An application method of a push-the-bit rotary guiding device, wherein:

• the push-the-bit rotary guiding device comprises:
• a mandrel having a central passage;
• a sleeve, which is rotatably sleeved outside the mandrel;
• a plurality of swing ribs, which are circumferentially arranged in an outer wall of the sleeve with an interval;
• an actuation mechanism, for controlling each swing rib to swing respectively;
• a plurality of detectors, which are circumferentially arranged in the outer wall of the sleeve with an interval and for detecting a distance to a well wall in real-time;
• and a controller, for determining whether the actuation mechanism is required to actuate the swing ribs to swing according to the detected distance;
• and
• the application method comprises steps of:
• through the detector of the push-the-bit rotary guiding device, detecting a distance between each detector and a well wall in real-time;
• and
• determining whether the distance is in a normal range;
• if the distance is in the normal range, actuating each swing rib to respectively swing by the actuation mechanism of the push-the-bit-rotary guiding device;
• if the distance is not in the normal range, stopping the actuation mechanism.

An application method of a push-the-bit rotary guiding device, wherein:

• the push-the-bit rotary guiding device comprises:
• a mandrel having a central passage;
• a sleeve, which is rotatably sleeved outside the mandrel;
• a plurality of swing ribs, which are circumferentially arranged in an outer wall of the sleeve with an interval;
• an actuation mechanism, for controlling each swing rib to swing respectively;
• a plurality of detectors, which are circumferentially arranged in the outer wall of the sleeve with an interval and for detecting a distance to a well wall in real-time;
• and a controller, for determining whether the actuation mechanism is required to actuate the swing ribs to swing according to the detected distance;
• the detectors are ultrasonic sensors;
• a mounting slot is provided on the outer wall of the sleeve;
• and each ultrasonic sensor comprises a transduction unit which is fixedly arranged in the mounting slot and able to realize a detecting function, and a protection window which is fixed at an opening at a top end of the mounting slot;
• each ultrasonic sensor further comprises a shock absorbing seat arranged between a bottom surface of the mounting slot and the transduction unit, a sound transmission window arranged between the protection window and the transduction unit, and a pressure maintaining filler which is sealed in the mounting slot by the sound transmission window;
• the protection window is made of a stainless steel material, and has a plurality of sound transmission holes thereon;
• the sound transmission window is made of fluororubber or silicone rubber;
• and the pressure maintaining filler is silicone oil;
• each swing rib is circumferentially aligned with the corresponding detector;
• a circumferential groove is provided on an outer wall of the mandrel;
• and the sleeve is arranged in the circumferential groove and able to rotate independently;
• the push-the-bit rotary guiding device further comprises a clutch for cutting off or transferring a power from the mandrel to the sleeve;
• and
• the application method comprises steps of:
• through the detector of the push-the-bit rotary guiding device, detecting a distance between each detector and a well wall in real-time;
• and
• determining whether the distance is in a normal range;
• if the distance is in the normal range, actuating each swing rib to respectively swing by the actuation mechanism of the push-the-bit-rotary guiding device;
• if the distance is not in the normal range, stopping the actuation mechanism.