Downhole pressure pulse activated by jack element
View Patent ↗In one aspect of the present invention, a method has steps for forming a wellbore with a tool string bit having a body intermediate a shank and a working face. The bit body has a fluid passageway and at least a portion of a jack element is disposed within the body. The jack element also has an end forming at least a portion of a relief mechanism in the fluid passageway and a distal end substantially protruding from the working face. The bit connected to a tool string is deployed into a wellbore. Fluid is passed through the fluid passageway. A bottom of the wellbore is destructed by pulsing the fluid traveling through the passageway by opening and closing the relief mechanism.
1. A method for forming a wellbore, comprising the steps of:
providing a tool string bit with a body intermediate a shank and a working face, the bit body comprising a fluid passageway, at least a portion of a jack element being disposed within the body and comprising an end forming at least a portion of a relief mechanism in the fluid passageway and a distal end substantially protruding from the working face;
deploying the bit when connected to a tool string into a wellbore;
passing fluid through the fluid passageway; and
destructing a bottom of the wellbore by pulsing the fluid traveling through the passageway by opening and closing the relief mechanism.
2. The method of claim 1 , wherein the pulsing fluid generates a suction pressure pulse in the wellbore.
3. The method of claim 1 , wherein an expansion or contraction of the tool string component connected to the drill bit contributes to the suction pressure pulse.
4. The method of claim 1 , wherein the relief mechanism comprises a relief valve.
5. The method of claim 1 , wherein the relief mechanism comprises a rotary valve.
6. The method of claim 1 , wherein a portion of the relief mechanism is adapted for attachment to a driving mechanism.
7. The method of claim 6 , wherein the driving mechanism is a motor, turbine, electric generator, or combinations thereof.
8. The method of claim 6 , wherein the driving mechanism is controlled by a closed loop system.
9. The method of claim 6 , wherein the driving mechanism and the jack element rotate opposite each other.
10. The method of claim 1 , wherein the working face comprises a plurality of cutting elements.
11. The method of claim 1 , wherein a spring mechanism disposed within the fluid passageway of the tool string bit is adapted to engage the jack element.
12. The method of claim 1 , wherein a nozzle is disposed within an opening in the working face of the tool string bit.
13. The method of claim 1 , wherein a surface of the relief mechanism comprises a hardness of at least 58 HRc.
14. The method of claim 13 , wherein the surface comprises a material selected from the group consisting of chromium, tungsten, tantalum, niobium, titanium, molybdenum, carbide, natural diamond, polycrystalline diamond, vapor deposited diamond, cubic boron nitride, TiN, AlNi, AlTi, TiAlN, CrN/CrC/(Mo, W)S2, TiN/TiCN, AlTiN/MoS2, TiAlN, ZrN, diamond impregnated carbide, diamond impregnated matrix, silicon bonded diamond, and/or combinations thereof.
15. The method of claim 1 , wherein the closed relief mechanism restricts all flow within the fluid passageway.
16. The method of claim 1 , wherein the closed relief mechanism restricts a portion of the flow within the fluid passageway.
17. The method of claim 1 , wherein the tool string comprises a sensor adapted to receive acoustic reflections.
18. The method of claim 17 , wherein the acoustic reflections are produced by the pulse that propagates into the formation.
19. The method of claim 17 , wherein the acoustic reflections are produced by the vibrations of the jack element.
20. The method of claim 1 , wherein a pressure sensor is fixed to the side of the tool string bit.