摘要:
A method and apparatus for manufacturing a continuous metal tube having a plurality of electrical conductors disposed therein, by using a spring member to depress the electrical conductors while a flat metal strip is formed into a tubular member and welded to enclose the electrical conductors. The spring member functions to protect the electrical conductors from heat damage. The welding occurs completely downstream of the spring member in order to avoid excessive heat buildup in the spring member.
摘要:
A permanent magnet motor for operation at elevated temperatures wherein the magnets are clamped to the motor shaft by means of high temperature plastic bushings. The bushings have a coefficient of thermal expansion that exceeds the coefficient of thermal expansion of the motor shaft.
摘要:
A device having a large fluid drag tendency is lowered into a well at a rate which gives no net drag against the fluid. The condition of no net drag is indicated by the tension in a line used to lower the tool into the well. When the spool-off rate is such that this tension force is equal to or slightly exceeds the weight of the tool plus the weight of the line in the borehole the tool is moving at a speed equal to the average flow velocity in the well. This velocity may be determined by measurement of the spool-off rate.
摘要:
A method and apparatus for determining the vapor flow only, or the vapor and liquid flows into various formations surrounding a thermal injection well. The apparatus utilizes a downhole tool having bristles on its outer surface for impeding the flow of fluid past the tool and an instrument at the surface for measuring the drag force produced on the tool as it is moved downward and upward through the well. The fluid flows at various depths in the well are calculated from the measured drag forces.
摘要:
A method and apparatus for venting purge fluid from an enclosed housing to maintain a positive known reference pressure differential between the housing and the variable pressure atmosphere surrounding the housing. The apparatus utilizes a specially designed fluidized bed to vent the purge fluid while maintaining a positive known reference back pressure. The fluidized bed automatically compensates for changes in the temperature or pressure of the atmosphere surrounding the housing.
摘要:
A method and apparatus for measuring the quality rate of the steam injected into a hydrocarbon formation in a thermal recovery process. The method measures the density and flow rate of the steam downhole using a mechanical/electrical apparatus. The quality of the steam is calculated from the measured density and flow rate. The apparatus comprises an electric motor-generator and turbine wheel combination, the no-load speed of the motor being related to velocity of the steam while the stall torque is related to density of the steam.
摘要:
A method and apparatus for manufacturing a continuous metal tube having a plurality of electrical conductors disposed therein, by using a spring member to depress the electrical conductors while a flat metal strip is formed into a tubular member and welded to enclose the electrical conductors. The spring member functions to protect the electrical conductors from heat damage. The welding occurs completely downstream of the spring member in order to avoid excessive heat buildup in the spring member.
摘要:
A method and apparatus for measuring both the quality and flow rate of steam injected into a hydrocarbon formation in a thermal recovery process. The method measures both the quantity of water and the flow rate of the steam. Both measurements can be made at any location in the borehole to determine the quality and quantity of steam injected into a particular formation. The apparatus utilizes a propeller motor/generator combination to determine the vapor flow rate; the drag produced by a network of bristles extending across the borehole determines the vapor flow rate and the quantity of liquid present.
摘要:
A network of bristles extending across a steam injection well provides affirmative liquid/vapor separation and control. The orientation of the bristles is controlled to direct the liquid toward or away from the borehole wall as desired.
摘要:
A system for assuring subsea hydrocarbon production flow in pipelines by chilling the hydrocarbon production flow in a heat exchanger and causing solids to form, periodically removing deposits and placing them in a slurry utilizing a closed loop pig launching and receiving systems.