PRAD RESEARCH AND DEVELOPMENT LIMITED.
|PRAD RESEARCH AND DEVELOPMENT LIMITED. Patent applications|
|Patent application number||Title||Published|
|20120241163||MANAGED PRESSURE DRILLING WITH RIG HEAVE COMPENSATION - A method for maintaining pressure in a wellbore drilled from a drilling platform floating on a body of water includes pumping fluid at a determined flow rate into a drill string disposed in a wellbore and measuring fluid pressure within a fluid discharge line of fluid returning from the wellbore. The fluid discharge line has a variable length corresponding to an elevation of the floating platform above the bottom of the body of water. The wellbore pressure is determined at a selected depth in the wellbore or at a selected position along a drilling riser or variable length portion of the fluid discharge line using known parameters/methods. The determined wellbore pressure is adjusted for changes in length of the fluid discharge line corresponding to changes in the elevation of the floating platform relative to the bottom of the body of water.||09-27-2012|
|20110094741||METHODS AND APPARATUS FOR MEASURING RETURN FLOW IN A WELL - The invention provides apparatus for use in a wellbore (||04-28-2011|
|20100127888||USING POCKET DEVICE TO SURVEY, MONITOR, AND CONTROL PRODUCTION DATA IN REAL TIME - A system for real-time data surveillance in an oilfield operation includes a data collection system deployed at a well site for collecting oilfield data; an office-based computer system for storing and analyzing the oilfield data; a portable device, wherein the portable device includes at least one program for communicating with the office-based computer system, for surveying the oilfield data stored in the office-based computer system, and for causing the office-based computer system to perform a process implemented on the office-based computer system; and a communication system providing communication links among the data collection system, the office-based computer system, and the portable device.||05-27-2010|