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Stabilizer with Drilling Fluid Diverting Ports

a technology of drilling fluid and stabilizer, which is applied in the direction of drilling pipes, drilling casings, borehole/well accessories, etc., can solve the problems of reducing the penetration rate of the drill bit into the earth and the rate of decline of the penetration rate, so as to reduce the accumulation of cuttings or other debris, the effect of preventing the accumulation

Inactive Publication Date: 2013-09-12
RITE INCREASER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes ways to prevent the buildup of debris on a drill string during drilling operations. This is achieved by adding a device called a drilling sub with a passage that allows drilling fluid to flow through it. This creates additional turbulence in the flow of the drilling fluid, which helps to clear out any sediment that may accumulate between the blades of the drill string. This results in a cleaner drill string and easier drilling operations.

Problems solved by technology

If the cuttings are not readily removed, the rate of penetration of the drill bit into the earth declines.
If the mud motor is not able to rotate the drill bit at a desired rotational speed, the rate of penetration may decline.

Method used

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  • Stabilizer with Drilling Fluid Diverting Ports
  • Stabilizer with Drilling Fluid Diverting Ports
  • Stabilizer with Drilling Fluid Diverting Ports

Examples

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Embodiment Construction

[0023]Referring to FIG. 1, a well bore 11 is illustrated being drilled by a drill string 13. Although well bore 11 is shown as being vertical, often it will have a horizontal portion. In this example, drill string 13 includes a mud motor 15, which is a conventional component. Mud motor 15 typically has blades or stabilizers 17 extending from its outer side. A drilling fluid or drilling mud diverting sub 19 is secured to the lower end of mud motor 15. Sub 19 has diverting nozzles 21 in its side wall that have outlets pointing outward and upward. Sub 19 may be joined to an upper end 23 of a conventional earth boring device or bit 25.

[0024]In this example, bit 25 is a drag bit having cutting blades 27 extending from a circumference to a lower side or face. Blades 27 have cutting elements 29 mounted thereto for scraping the earth formation as bit 25 rotates. Cutting elements 29 may be formed of a polycrystalline diamond or other materials. Bit 25 also has at least one, and normally seve...

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PUM

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Abstract

Described are drilling subs that may be connected in a drill string for reducing the accumulation of debris on the exterior of the drill string or otherwise facilitating the return of drilling fluid during drilling operations. A plurality of radially spaced stabilizing blades protrude from an exterior surface of the drilling subs to define exterior flow channels therebetween through which drilling fluid returning to the surface may is directed. Diverting nozzle passages are provided that extend between an inner axial passage of the drilling subs and the exterior surface of the drilling subs. The diverting nozzle passages exhibit a radial spacing corresponding to a radial spacing of the exterior flow channels such that drilling fluid discharged from the diverting nozzle passages is directed toward the exterior flow channels.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to and the benefit of co-pending U.S. Provisional Application 61 / 608,755, filed Mar. 9, 2012. This application also claims priority to and the benefit of co-pending U.S. application Ser. No. 13 / 341,991, filed Dec. 30, 2011, which claims priority to U.S. Provisional Application 61 / 430,877, filed Jan. 7, 2011. The full disclosure of each of these applications is hereby incorporated by reference herein for all purposes.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]This application relates to earth boring operations, and in particular to upward and outward pointing drilling fluid diverting nozzles located in a drill string above a drill bit.[0004]2. Description of the Related Art[0005]Oil and gas wells are typically drilled with a drill string having a drill bit on bottom that is rotated. One type of drill bit is a drag bit having blades with cutting disks that scrape against and cut the form...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B21/10E21B17/10
CPCE21B17/1078E21B21/103
Inventor RANKIN, E. EDWARD
Owner RITE INCREASER