Active equivalent circulating density control with real-time data connection

Patent metadata

Field	Value
Publication number	US-8973676-B2
Application number	US-201113193144-A
Country	US
Kind code	B2
Filing date	Jul 28, 2011
Priority date	Jul 28, 2011
Publication date	Mar 10, 2015
Grant date	Mar 10, 2015

Abstract

An apparatus uses well devices, both downhole and at the surface, to control at least one condition in a wellbore. The downhole equipment includes flow restriction devices that modulate fluid flow along a wellbore annulus, flow bypass devices that selectively bypass fluid flow from wellbore tubular bore to the wellbore annulus, and downhole sensors that generate information relating to a selected parameter of interest. The surface equipment includes a pump that circulates a drilling fluid in the wellbore. Controllers, which may be downhole and/or at the surface, use sensor information to generate advice parameters or signals that may be used to control the flow restriction devices, the flow bypass devices, and/or the fluid circulation pump.

First claim

What is claimed is:

1. An apparatus for controlling pressure in a wellbore formed in a subterranean formation, comprising:
at least one flow restriction device in the wellbore and configured to modulate fluid flow along an annulus formed between a wellbore tubular and a wellbore wall;
at least one flow bypass device in the wellbore and configured to selectively bypass fluid flow from a bore of the wellbore tubular to the annulus;
at least one sensor in the well, the at least o…

Assignees

• Grimmer Harald
• Baker Hughes Inc

Inventors

• Grimmer Harald

Classifications

• E21B21/08 Primary

  Fixed Constructions · mapped topic