Chrome free water-based wellbore fluid

a wellbore fluid, chrome free technology, applied in the direction of fluid removal, wellbore/well accessories, chemistry apparatus and processes, etc., can solve the problems of potential gel formation, fluid loss control is an issue, and fluid loss control becomes a major challenge, and achieve the desired rheological profile and good fluid loss properties.
US20110180256A1Inactive Publication Date: 2011-07-28MI +1
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
MI
Publication Date
2011-07-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

Methods for maintaining the rheology and reducing the fluid loss of chrome-free, aqueous-based wellbore fluids under high temperature-high pressure conditions are disclosed. The method may comprise formulating the chrome-free, aqueous wellbore fluid with an aqueous base fluid, at least one chrome-free viscosifier, at least one chrome-free fluid loss control additive, at least one chrome-free dispersant; and circulating the chrome-free aqueous-based wellbore fluid in a wellbore at temperatures exceeding 300° F.
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Description

BACKGROUND OF INVENTION

[0001] 1. Field of the Invention

[0002] Embodiments disclosed herein relate generally to water-based wellbore fluids and methods of using such fluids. In particular, embodiments disclosed herein relate generally to water-based fluids being chrome-free.

[0003] 2. Background Art

[0004] During the drilling of a wellbore, various fluids are typically used in the well for a variety of functions. The fluids may be circulated through a drill pipe and drill bit into the wellbore, and then may subsequently flow upward through wellbore to the surface. During this circulation, the drilling fluid may act to remove drill cuttings from the bottom of the hole to the surface, to suspend cuttings and weighting material when circulation is interrupted, to control subsurface pressures, to maintain the integrity of the wellbore until the well section is cased and cemented, to isolate the fluids from the formation by providing sufficient hydrostatic pressure to prevent the ingress of for...

Claims

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