Boring or penetrating the earth – With signaling – indicating – testing or measuring – Indicating – testing or measuring a condition of the formation
Reexamination Certificate
2005-12-13
2005-12-13
Walker, Zakiya (Department: 3672)
Boring or penetrating the earth
With signaling, indicating, testing or measuring
Indicating, testing or measuring a condition of the formation
C175S038000, C175S072000
Reexamination Certificate
active
06973977
ABSTRACT:
A method for drilling a wellbore in a formation using a drilling fluid, wherein the drilling fluid has a first temperature, and wherein the wellbore has a first wellbore depth. In one embodiment, the method comprises determining at least one fracture gradient, wherein the fracture gradient is determined at about the first wellbore depth; increasing the temperature of the drilling fluid from the first temperature to a desired temperature at about the first wellbore depth; drilling into the formation at increasing wellbore depths below the first wellbore depth, wherein at least one equivalent circulating density of the drilling fluid is determined at about the first wellbore depth; and setting a casing string at a depth at which the equivalent circulating density is about equal to or within a desired range of the fracture gradient. In other embodiments, an automated system is used to maintain the temperature of the drilling fluid at about first wellbore depth.
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Schmidt, Joe, Gonzales, Manuel E., Bloys, Ben, and Pepin, Greg; “Method and System for Minimizing Circulating Fluid Loss during Drilling of a Well Bore by Using a Heated Circulating Fluid”, [online]. retrieved from the Internet: <URL: https://priorart.ip.com/viewPub.jsp, (May 2002).
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Conley & Rose, P.C.
Halliburton Energy Systems, Inc.
Walker Zakiya
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