Institut Francais Du Pe'trole

Yannick Peysson

Jean Falcimaigne

Benjamin Herzhaft

Emmanuel Duret

Quang-Huy Tran

Isabelle King

A system inserted between the base of a riser () and a production well flowline for collecting an effluent consisting of at least a gas phase and a liquid phase, includes a capacity () including an inlet port for the effluent and two outlet ports, one in the upper part of said capacity for the gas phase, the other in the lower part for the liquid phase communicating with the base of the riser, a gas supply line () connecting the gas outlet port to the riser at a predetermined height H, including a flow control valve (), and an instrumentation set for locating the level of the liquid/gas interface in the capacity, a computer receiving the instrumentation data for determining the instructions for controlling said flow control valve so as to adjust the volume of gas fed at height H into the riser.

System for neutralizing the formation of slugs in a riser

A method providing real-time determination of a thermal profile of the drilling fluid in a well from three measuring points available in the field, i.e. the injection temperature, the outlet temperature and the bottomhole temperature is disclosed. The form of the profile between these three points is defined by a type curve representative of the thermal profiles in a well under drilling, estimated from physical considerations on thermal transfers in the well.

Method of determining the thermal profile of a drilling fluid in a well

The present invention relates to a method of calculating the pressure drops created by a given fluid in a circuit having a determined thermal profile. The method includes making up a database (BD) giving the rheology of various fluids at least according to the temperature; segmenting a thermal profile ( ) into sections ( ) and determining a representative temperature value (T , T , T , T ) for the fluid in each section; using the database for determining the rheology of the fluid in each section at the representative temperature; and calculating and adding up the pressure drops in each section considering the rheology determined.

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Paris, France

Yannick Peysson