Drilling fluid flow diverter

Details Drilling fluid flow diverter Drilling fluid flow diverter

2011-03-29

2011-03-29

Neuder, William P (Department: 3672)

Boring or penetrating the earth

Automatic control

C175S232000, C175S317000, C175S318000

Reexamination Certificate

active

07913772

ABSTRACT:
An embodiment of the apparatus includes a housing having a first flow bore and a second flow bore, the first flow bore having a drilling fluid flowing therein, a device disposed in the second flow bore to receive a fluid flow, and a diverter disposed between the first and second flow bores, the diverter having a first position preventing the drilling fluid from flowing into the second flow bore and a second position allowing a portion of the drilling fluid to flow into the second flow bore and through the device. Another embodiment includes a variable second position directing the drilling fluid into the second flow bore at a variable flow rate. A further embodiment includes a drill collar as the housing and a power generation assembly as the device to receive the fluid flow. Embodiments of a method of diverting a fluid flow in a downhole tool include diverting a portion of a first fluid flow to a second flow bore, and further varying a flow rate of the fluid to the second flow bore.

REFERENCES:
patent: 5839508 (1998-11-01), Tubel et al.
patent: 6019182 (2000-02-01), Rountree et al.
patent: 2009/0195250 (2009-08-01), Welshans et al.
patent: 2402421 (2004-12-01), None
PCT/US2007/070902 International Search Report, Jul. 30, 2008.
Intellectual Property Office of Singapore, Written Opinion for Singapore Application No. 200808726-4, Jan. 19, 2010.
Examination Report for Canadian Application No. 2,648,910, Feb. 8, 2010.

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