Customized drilling tools

• US 10,337,257 B2
• Filed: 06/22/2017
• Issued: 07/02/2019
• Est. Priority Date: 06/30/2016
• Status: Active Grant

• Current Assignee: Smith International Incorporated (Schlumberger NV)
• Original Assignee: Smith International Incorporated (Schlumberger NV)
• Inventors: Zhang, Youhe, Gan, Xiaoge, Song, Huimin
• Primary Examiner(s): Bemko, Taras P
• Application Number:
  US15/630,420
• Publication Number:
  US 20180002986A1
• Time in Patent Office: 740 Days
• Field of Search: 175 57
• CPC Class Codes: E21B 10/50 the bit being of roller type
• CPC Class Codes: E21B 10/602 the bit being a rotary drag type bit with blades

Abstract

A bit includes a bit body having at least one blade coupled to the bit body. The blade has a plurality of cutting elements at a nose region and a shoulder region of the blade. A plurality of fluid outlets are positioned on the blade such that at least 30% of the cutting elements have a fluid outlet within a distance that is two or three times a cutting element diameter away from a cutting face of the cutting element.

Claims

1. A bit for removing material from a formation, the bit comprising:

a bit body;

a blade coupled to the bit body, the blade defining a nose region and a shoulder region;

a plurality of cutting elements coupled to the blade in the nose region and the shoulder region, at least one cutting element of the plurality of the cutting elements having a cutting face having a diameter; and

a plurality of fluid outlets, the plurality of fluid outlets positioned such that at least 70% of a totality of the cutting elements have at least one fluid outlet positioned an outlet distance equal to or less than three times the diameter of the cutting element away from the cutting face of the at least one cutting element.

2. The bit of claim 1, further comprising a nozzle positioned in the bit body, the nozzle having a nozzle diameter and the plurality of fluid outlets having a fluid outlet diameter, the nozzle diameter being greater than the fluid outlet diameter.

3. The bit of claim 1, the bit having three or fewer primary blades.

4. The bit of claim 1, the plurality of cutting elements being arranged at least in a row of primary cutting elements on the blade and at least one row of secondary cutting elements on the blade, the at least one row of secondary cutting elements positioned rotationally behind the row of primary cutting elements.

5. The bit of claim 4, at least one fluid outlet of the plurality of fluid outlets being positioned between the row of primary cutting elements and the at least one row of secondary cutting elements.

6. The bit of claim 1, at least 10% of the totality of the fluid outlets being positioned an outlet distance equal to or less than 50% the diameter of the cutting element away from the cutting face of at least one of the plurality of cutting elements.

7. The bit of claim 6, the nose region and shoulder region of the bit having a fluid outlet to cutting element ratio of at least 0.5.

8. The bit of claim 7, each of the fluid outlets of the plurality of fluid outlets having a fluid path, and at least one of the plurality of cutting elements positioned on the nose region and shoulder region having a fluid path directed at or across the cutting face of the at least one cutting element.

9. The bit of claim 1, at least one fluid outlet of the plurality of fluid outlets having a fluid conduit providing fluid communication to the at least one fluid outlet, the fluid conduit tapering inward or outward at the at least one fluid outlet.

10. The bit of claim 1, each of the fluid outlets of the plurality of fluid outlets having an outlet diameter and each of the outlet diameters being at least 0.075 in. (1.91 mm).

11. The bit of claim 1, the plurality of cutting elements including a row of primary cutting elements on the blade and at least one row of secondary cutting elements on the blade, the at least one row of secondary cutting elements positioned rotationally behind the row of primary cutting elements, and at least one of the fluid outlets of the plurality of fluid outlets being a primary fluid outlet and configured to provide fluid to the row of primary cutting elements and at least one of the fluid outlets of the plurality of fluid outlets being a secondary fluid outlet and configured to provide fluid to the at least one row of secondary cutting elements, the primary fluid outlet having an outlet diameter greater than an outlet diameter of the secondary fluid outlet.

12. The bit of claim 1, each cutting element of the plurality of cutting elements in the nose region and the shoulder region being associated with an associated fluid outlet of the plurality of fluid outlets.

13. A drill bit, comprising:

a bit body, the bit body having a central conduit and a chamber at the end of the central conduit configured to convey drilling fluid through the bit body;

a blade coupled to the bit body;

a plurality of cutting elements coupled to the blade, at least one cutting element of the plurality of the cutting elements having a cutting face having a diameter;

a plurality of fluid outlets, the plurality of fluid outlets positioned such that at least 10% of a totality of the cutting elements have a fluid outlet positioned a distance equal to or less than 100% the diameter of the cutting face away from the cutting face of the cutting element; and

a primary conduit branching from the chamber and a first fluid conduit branching from the primary conduit to direct the drilling fluid to at least one fluid outlet of the plurality of fluid outlets.

14. The drill bit of claim 13, the first fluid conduit providing fluid communication to a first fluid outlet of the at least one fluid outlet and further comprising a second fluid conduit branching from the primary conduit and providing fluid communication between the primary conduit and at least a second fluid outlet of the at least one fluid outlet.

15. The drill bit of claim 13, at least one of the primary conduit or the first fluid conduit having a non-linear path.

16. The drill bit of claim 13, at least one of the primary conduit or the first fluid conduit having a fluid path with a nonzero fluid path angle relative to a rotational axis of the bit body.

17. The drill bit of claim 13, the plurality of fluid outlets being formed on the blade and being recessed relative to the plurality of cutting elements.

18. A bit for removing material from a formation, the bit comprising:

a bit body;

a blade coupled to the bit body, the blade defining a nose region and a shoulder region;

a plurality of cutting elements coupled to the blade in the nose region and the shoulder region, at least one cutting element of the plurality of the cutting elements having a cutting face having a diameter;

a nozzle having a nozzle diameter; and

a plurality of fluid outlets having a fluid outlet diameter, the fluid outlet diameter being less than the nozzle diameter, the plurality of fluid outlets positioned such that at least 60% of the totality of cutting elements have at least one fluid outlet positioned an outlet distance equal to or less than three times the diameter of the cutting element away from the cutting face of the at least one cutting element.

19. The bit of claim 18, the nozzle being located in a junk slot and not on the blade.

20. The bit of claim 18, plurality of fluid outlets being formed on the blade.