The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 28, 2017
Filed:
May. 21, 2015
Mhwirth As, Kristiansand, NO;
Dag Vavik, Trondheim, NO;
MHWIRTH AS, Kristiansand, NO;
Abstract
A method for predicting a formation of hydrates in a wellbore/riser annulus during a drilling operation. The method includes logging actual mud properties. Actual sets of pressure and temperature data at given locations/intervals in the wellbore or in the drilling riser annulus are continuously measured and/or calculated. A theoretical temperature profile for the formation of hydrates dependent on mud properties and pressure as a function of a true vertical depth in a well is determined. The theoretical temperature profile for the formation of hydrates in a control system is stored. The measured and/or calculated actual sets of pressure and temperature data is compared with the theoretical temperature profile for the formation of hydrates. A signal is issued if the measured and/or calculated actual sets of pressure and temperature data falls below or is lower than a predefined safety margin for the theoretical temperature profile for the formation of hydrates.