초록 ▼

It is often desirable to meter multiphase fluid flow in pipes (e.g. bore holes). In order to obtain reliable/accurate flow rate measurements it is known to incorporate obstructions in the flow path to cause homogenization. A non-obstructive method of homogenizing the flow of a multiphase mixture of

It is often desirable to meter multiphase fluid flow in pipes (e.g. bore holes). In order to obtain reliable/accurate flow rate measurements it is known to incorporate obstructions in the flow path to cause homogenization. A non-obstructive method of homogenizing the flow of a multiphase mixture of fluids in a bore hole comprises providing in the bore hole a pipe section which has an internal surface with a step discontinuity, whereby when fluid flows through the pipe section, turbulent stresses are caused by the discontinuity, leading to homogenization by turbulent mixing. There is disclosed a flow meter which comprises a pipe length with a first section having a step change in cross-section for homogenizing fluid flow therethrough, in series with a venturi flow meter in which a differential pressure can be measured in a second pipe section having a smooth change in cross-section. Non-obstructive homogenizers and flow meters do not block the passage of objects such as tools, logging devices, etc along a pipe.

대표청구항 ▼

A method of homogenizing the flow of a multiphase mixture of fluids in a bore hole without imposing a physical obstruction to the flow of the fluid, which comprises: A. providing in the bore hole a pipe having a first section which has an internal surface with an initial diameter, a step discontinui

A method of homogenizing the flow of a multiphase mixture of fluids in a bore hole without imposing a physical obstruction to the flow of the fluid, which comprises: A. providing in the bore hole a pipe having a first section which has an internal surface with an initial diameter, a step discontinuity consisting of a change from said initial diameter to a larger diameter immediately adjacent to said first section, and a second section having an internal surface with said larger diameter immediately adjacent to said step discontinuity, said first section of a pipe being free of physical obstructive to said fluid flow; B. establishing fluid flow of said multiphase fluid through the pipe in the direction from said first section to said second section; and C. homogenizing said fluid by imposing turbulent stresses caused by said discontinuity on said fluid, thereby leading to homogenization by turbulent mixing.