Three axis vibrating device
Provided is a downhole vibrating tool comprising an interconnected power section, axial shock assembly and lateral vibration assembly wherein the power section comprising a rotor and a stator, the rotor comprising a plurality of lobes and the stator comprising a second plurality of recesses adapted to receive the plurality of lobes, the number of recesses greater than the number of lobes; the axial shock assembly comprising a valve assembly, the axial shock assembly adapted to vary fluid flow therethrough; and the lateral vibration assembly comprising an eccentric mass; wherein the power section, the axial shock assembly and the lateral vibration assembly are aligned linearly.
1. An apparatus for generating vibration in a drill string, comprising:
a power section including a rotor and a stator, wherein the rotor is driven to rotate relative to the stator;
a rotary valve plate coupled to the power section, between the power section and a drill bit, wherein the rotary valve plate rotates with the rotor, and wherein the rotary valve plate includes one or more pass-through sections configured to permit fluid to flow through the rotary valve plate;
a rotary insert in which the rotary valve plate is received, wherein the rotary insert comprises one or more ports, the rotary valve plate being angularly adjustable in the rotary insert so as to at least partially misalign the one or more ports of the rotary insert and the one or more pass-through sections of the rotary valve plate; and
a stationary valve plate positioned axially adjacent to the rotary valve plate, wherein the rotary valve plate rotates relative to the stationary valve plate, and wherein the stationary valve plate defines one or more pass-through sections configured to permit fluid to flow though the stationary valve plate, wherein, when the rotary valve plate rotates relative to the stator, the one or more pass-through sections of the rotary valve plate periodically align with the one or more pass-through sections of the rotary valve plate, thereby generating pressure pulses in the drill string,
wherein the rotary valve plate and the stationary valve plate each comprise a cylindrical, disk-shaped element, and wherein the one or more pass-through sections of each of the rotary valve plate and the stationary valve plate comprise one or more holes that extend only in an axial direction.
2. The apparatus of claim 1 , further comprising a shock sub positioned uphole of the rotary valve plate and the stationary valve plate, wherein the shock sub is configured to attenuate vibration uphole of the rotary valve plate and the stationary valve plate.
3. The apparatus of claim 1 , further comprising a drive shaft positioned axially between the rotor and the rotary valve plate, the rotary valve plate being coupled to the rotor via the drive shaft.
4. The apparatus of claim 3 , further comprising a continuously variable joint that connects the drive shaft to the rotor, wherein the rotor rotates eccentrically to the drive shaft.
5. The apparatus of claim 3 , further comprising a mass positioned on the drive shaft eccentrically, such that rotation of the drive shaft generates lateral vibration in the drill string.
6. The apparatus of claim 5 , wherein the mass is positioned relative to the one or more pass-through sections of the rotary valve plate so as to tune a combination of axial vibrations generated by the rotation of the rotary valve plate relative to the stationary valve plate and the lateral vibration generated by rotating the eccentric mass on the drive shaft.
7. The apparatus of claim 1 , further comprising a sleeve coupled to the rotor, the rotary valve plate being received into the sleeve and the stationary valve plate being outside of the sleeve.
8. The apparatus of claim 1 , wherein a non-zero minimum fluid flow rate is permitted past the rotary valve plate and the stationary valve plate throughout an entire rotation of the rotary valve plate relative to the stationary valve plate.
9. The apparatus of claim 1 , wherein the rotor comprises lobes and the stator comprises cavities, the rotor and stator forming a progressive cavity motor.
10. The apparatus of claim 1 , further comprising:
a stationary insert in which the stationary valve plate is received, wherein the stationary insert comprises one or more ports, the stationary valve plate being angularly adjustable in the stationary insert so as to at least partially misalign the one or more ports of the stationary insert and the one or more pass-through sections of the stationary valve plate.
11. The apparatus of claim 10 , wherein the stationary insert is stationary with respect to the stator, and wherein the rotary insert rotates with the rotary valve plate.
12. A method, comprising:
pumping fluid into a drill string, wherein pumping causes a rotor to rotate relative to a stator, wherein rotating the rotor causes a rotary valve plate to rotate relative to a stationary valve plate, the rotary valve plate and the stationary valve plates both including pass-through sections that periodically align and misalign as the rotor rotates, generating pressure pulses which cause axial vibration in the drill string, wherein the rotary valve plate and the stationary valve plate are cylindrical, disk-shaped elements, and wherein the pass-through sections of the rotary valve plate and the pass-through sections of the stationary valve plate are holes that extend only in an axial direction through the respective disk-shaped element; and
adjusting an angular orientation of the rotary valve plate with respect to a rotary valve insert having ports, the rotary valve plate being received at least partially into the rotary valve insert; or
adjusting an angular orientation of the stationary valve plate with respect to a stationary valve insert having ports, the stationary valve plate being received at least partially into the stationary valve insert.
13. The method of claim 12 , further comprising:
adjusting the angular orientation of the rotary valve plate with respect to the rotary valve insert having the ports, the rotary valve plate being received at least partially into the rotary valve insert; and
adjusting the angular orientation of the stationary valve plate with respect to the stationary valve insert having the ports, the stationary valve plate being received at least partially into the stationary valve insert.
14. The method of claim 12 , further comprising attenuating vibration upward of the rotary valve plate and the stationary valve plate using a shock sub.
15. The method of claim 12 , further comprising positioning an eccentric mass on a drive shaft that is connected to the rotor and to the rotary valve plate, wherein positioning the eccentric mass comprises placing the eccentric mass relative to the one or more pass-through sections of the rotary valve plate so as to tune a lateral vibration with the axial vibrations.
16. The method of claim 15 , wherein the rotor comprises lobs and the stator comprises cavities, and wherein the rotor is driven to rotate eccentrically to the drive shaft, the method further comprising connecting a continuously variable joint between the drive shaft and the rotor.
17. The method of claim 12 , further comprising maintaining a non-zero minimum flow rate past the rotary valve plate and the stationary valve plate, such that a function of the pressure pulses versus time is non-sinusoidal.
18. An apparatus for generating vibration in a drill string, comprising:
a power section including a rotor and a stator, wherein the rotor is driven to rotate relative to the stator;
a rotary valve plate coupled to the power section, between the power section and a drill bit, wherein the rotary valve plate rotates with the rotor, and wherein the rotary valve plate includes one or more pass-through sections configured to permit fluid to flow through the rotary valve plate;
a stationary valve plate positioned axially adjacent to the rotary valve plate, wherein the rotary valve plate rotates relative to the stationary valve plate, and wherein the stationary valve plate defines one or more pass-through sections configured to permit fluid to flow though the stationary valve plate, wherein, when the rotary valve plate rotates relative to the stator, the one or more pass-through sections of the rotary valve plate periodically align with the one or more pass-through sections of the rotary valve plate, thereby generating pressure pulses in the drill string; and
a stationary insert in which the stationary valve plate is received, wherein the stationary insert comprises one or more ports, the stationary valve plate being angularly adjustable in the stationary insert so as to at least partially misalign the one or more ports of the stationary insert and the one or more pass-through sections of the stationary valve plate,
wherein the rotary valve plate and the stationary valve plate each comprise a cylindrical, disk-shaped element, and wherein the one or more pass-through sections of each of the rotary valve plate and the stationary valve plate comprise one or more holes that extend only in an axial direction.