Push the bit rotary steerable system
A method, device, and system is described herein for pushing a rotary drill bit. Pushing the rotary drill bit can include receiving a target direction in a formation to push the rotary drill bit while drilling a wellbore in a formation. Pushing the rotary drill bit can also include opening, at a first rotational position of a rotary bit pushing device disposed proximate to the rotary drill bit within the wellbore, a first inlet port of a first flow regulator. Pushing the rotary drill bit can further include closing, after the first rotational position of the rotary bit pushing device, the first inlet port. Pushing the rotary drill bit can also include sending, to a second flow regulator of the rotary bit pushing device, a second quantity of drilling fluid.
1 . A rotary bit pushing device, comprising:
a plurality of deflection devices spaced circumferentially around a longitudinal axis extending through the rotary bit pushing device, each deflection device being movable between a normal position and an extended position in which the deflection device can contact a wellbore and is farther from the longitudinal axis than when the deflection device is in the normal position, each deflection device having:
an inner channel and a sealing device in the inner channel; and
an outer surface, at least two recessed areas in the outer surface, and at least two stops, each positioned partially in one of the at least two recessed areas;
a first channel through which drilling fluid can flow toward a first deflection device of the plurality of deflection devices; and
a flow regulator that allows drilling fluid to flow into the first channel and toward the first deflection device depending on a rotational position of the rotary bit pushing device;
wherein:
the first deflection device is movable from the normal position to the extended position after drilling fluid has flowed through a first opening of the flow regulator and through the first channel toward the first deflection device.
2 . The device of claim 1 , further comprising a second channel and wherein:
a second deflection device of the plurality of deflection devices is movable from the normal position to the extended position after drilling fluid has flowed through a second opening of the flow regulator and through the second channel toward the second deflection device.
3 . The device of claim 1 , further comprising a body having a recess in which a deflection device holder is positioned, the first deflection device being retained in the deflection device holder.
4 . The device of claim 3 , wherein the deflection device holder includes an opening in which the first deflection device is positioned and at least two deflection device holder recesses, one for each of the at least two stops, one of the at least two stops being positioned partially in one of the at least two deflection device holder recesses and another of the at least two stops being positioned partially in another of the at least two deflection device holder recesses.
5 . The device of claim 4 , further comprising a first nozzle configured to direct drilling fluid toward the first deflection device such that drilling fluid that exits the first nozzle enters a cavity of the first deflection device.
6 . The device of claim 5 , further comprising a second flow regulator that is in fluid communication with a cavity extending longitudinally through the rotary bit pushing device, wherein drilling fluid that flows from the cavity and exits the second flow regulator can flow under a bottom end of the first deflection device.
7 . A rotary bit pushing device, comprising:
a body comprising:
a wall that forms a cavity extending from a first end of the body to a second end of the body;
a first recess for a first deflection device holder;
a second recess for a second deflection device holder; and
a third recess for a third deflection device holder;
a first deflection device holder positioned in the first recess and retaining a first deflection device movable between a normal position and an extended position in which the first deflection device can contact a wellbore;
a second deflection device holder positioned in the second recess and retaining a second deflection device movable between a normal position and an extended position in which the second deflection device can contact a wellbore;
a third deflection device holder positioned in the third recess and retaining a third deflection device movable between a normal position and an extended position in which the third deflection device can contact a wellbore;
wherein each of the first, second, and third deflection devices have:
an inner surface forming a cavity into which drilling fluid can flow to move that deflection device to its extended position;
an inner channel disposed along the inner surface and a sealing device in the inner channel; and
an outer surface, at least two recessed areas in the outer surface, and at least two stops, each positioned partially in one of the at least two recessed areas;
wherein the body includes:
a first channel through which drilling fluid can flow toward the first deflection device;
a second channel through which drilling fluid can flow toward the second deflection device; and
a third channel through which drilling fluid can flow toward the third deflection device; and
a flow regulator that allows drilling fluid to flow into one of the first channel, the second channel, and the third channel depending on a rotational position of the rotary bit pushing device.
8 . The device of claim 7 , wherein the first deflection device holder includes an opening in which the first deflection device is positioned and at least two first deflection device holder recesses, one for each of the at least two stops of the first deflection device, one of the at least two stops of the first deflection device being positioned partially in one of the at least two first deflection device holder recesses and another of the at least two stops of the first deflection device being positioned partially in another of the at least two first deflection device holder recesses.
9 . The device of claim 8 , wherein the second deflection device holder includes an opening in which the second deflection device is positioned and at least two second deflection device holder recesses, one for each of the at least two stops of the second deflection device, one of the at least two stops of the second deflection device being positioned partially in one of the at least two second deflection device holder recesses and another of the at least two stops of the second deflection device being positioned partially in another of the at least two second deflection device holder recesses.
10 . The device of claim 9 , wherein the third deflection device holder includes an opening in which the third deflection device is positioned and at least two third deflection device holder recesses, one for each of the at least two stops of the third deflection device, one of the at least two stops of the third deflection device being positioned partially in one of the at least two third deflection device holder recesses and another of the at least two stops of the third deflection device being positioned partially in another of the at least two third deflection device holder recesses.
11 . The device of claim 7 , further comprising a first nozzle configured to direct drilling fluid toward the first deflection device such that drilling fluid that exits the first nozzle enters the cavity of the first deflection device.
12 . The device of claim 11 , further comprising a second nozzle configured to direct drilling fluid toward the second deflection device such that drilling fluid that exits the second nozzle enters the cavity of the second deflection device.
13 . The device of claim 12 , further comprising a third nozzle configured to direct drilling fluid toward the third deflection device such that drilling fluid that exits the third nozzle enters the cavity of the third deflection device.
14 . The device of claim 7 , further comprising a second flow regulator that is in fluid communication with the cavity of the body, wherein drilling fluid that flows from the cavity of the body and exits the second flow regulator can flow under a bottom end of the first deflection device.