1
Clifford L Redus, Peter L Sigwardt: Subsea pumping device incorporating a wellhead aspirator. Texaco, Jack H Park, Kenneth R Priem, Russell J Egan, April 6, 1993: US05199496 (61 worldwide citation)

A system is disclosed for subsea transportation of a hydrocarbon production stream utilizing a wellhead aspirator to reduce wellhead flowing pressure. By using the Bernoulli effect, a head is delivered to the flowing stream that enables the crude oil/water/gas fluid within the system to be moved far ...


2
Clifford L Redus, Sze Foo Chien, Peter L Sigwardt: Method of determining the quality of steam for stimulating hydrocarbon production. Texaco, Robert A Kulason, James J O Louhlin, Robert B Burns, June 6, 1989: US04836032 (27 worldwide citation)

The use of an orifice plate in series with a critical flow choke provides a method of measurement for both steam quality and mass flowrate. Neither the orifice plate or the choke alone can be used to measure steam quality and mass flowrate. However, an expression for steam quality through both devic ...


3
Clifford L Redus: Method and apparatus for determining steam quality and mass flow rate. Texaco, Jack H Park, Kenneth R Priem, Russell J Egan, July 16, 1991: US05031466 (12 worldwide citation)

Steam quality, namely the mass of steam vapor divided by the total mass of water and steam vapor, is determined by measuring the degree of fluctuation of the differential pressure signal across the orifice of a single sharp-edged orifice plate in the steam carrying pipe. The steam quality is inverse ...


4
Gregory J Hatton, Michael G Durrett, Earl L Dowty, Gary E Collier, Clifford L Redus, Steven M Stockman: Petroleum stream analyzing means and method. Texaco, James J O Loughlin, Ronald G Gillespie, March 23, 1993: US05195380 (11 worldwide citation)

A multiphase petroleum stream pipeline analyzer including a defoaming device connected to an upstream section of the pipeline which reduces foam in the petroleum stream. Apparatus stratifies the petroleum stream after defoaming by causing the stream to flow down a decline at a predetermined angle to ...


5
Sze Foo Chien, Clifford L Redus, Peter L Sigwardt: Method for determining quality of reduced quality steam. Texaco, Robert A Kulason, James J O Loughlin, Robert B Burns, July 21, 1987: US04681466 (10 worldwide citation)

In a steam flow line that is delivering reduced quality steam, there is a method and/or system for determining the quality. It includes the steps of flowing quality steam through a first flow restriction, and mixing a measured quantity of water with the steam, downstream from the restriction. It als ...


6
Clifford L Redus: Steam quality and mass flow rate measurement using critical flow choke upstream of an orifice plate. Texaco, Jack H Park, Kenneth R Priem, Russell J Egan, July 16, 1991: US05031465 (8 worldwide citation)

A method and apparatus for measuring steam quality and mass flow rate at an injection wellhead includes measuring upstream pressure before a critical flow choke, downstream pressure after the choke and differential pressure across an orifice plate spaced downstream of the choke.


7
Clifford L Redus, James W Scott, Sze Foo Chien, Peter L Sigwardt: Measurement of steam quality and mass flow rate. Texaco, James L Bailey, Kenneth R Priem, William J Beard, June 6, 1995: US05421209 (7 worldwide citation)

Apparatus and method for concurrently determining steam flow rate and quality, through a conduit which comprises an orifice plate positioned in series with a critical flow venturi in said conduit. Pressure sensing means in the conduit senses pressures therein for application in a formula to provide ...


8
Sze Foo Chien, Joseph A Anderson, Clifford L Redus, James W Scott, Peter L Sigwardt: Method and apparatus for controlling the mass flow rate of steam in steam distribution systems. Texaco, Robert A Kulason, James J O Loughlin, Robert B Burns, August 25, 1992: US05141055 (4 worldwide citation)

Method and Apparatus for injection steam of know quality into a subterranean reservoir containing hydrocarbon fluids, to enhance or stimulate production of said fluids through a production well. Production stimulating steam from a pressurized source is injected into the reservoir by way of a critica ...