Abstract: A downhole pulsing-shock reach extender apparatus for overcoming static friction resistance in coiled-tubing drilling-fluid-pressure driven downhole operations, generating pulsed hydraulic shocks at the workstring by creating a fluid-hammer condition by repeated sudden opening and closing of a valve controlling a diverted portion of the flow of drilling fluid, while maintaining a constant flow of a portion of drilling fluid sufficient to operate and prevent damage to other components of the workstring, thereby extending the depth limit of downhole operations.

Abstract: A downhole pulsing-shock reach extender method for overcoming static friction resistance in coiled-tubing drilling-fluid-pressure driven downhole operations, by generating pulsed hydraulic shocks at the workstring by creating a fluid-hammer condition by repeated sudden opening and closing of a valve controlling a diverted portion of the flow of drilling fluid, while maintaining a constant flow of a portion of drilling fluid sufficient to operate and prevent damage to other components of the workstring, thereby extending the depth limit of downhole operations.

Abstract: The invention relates to a method for the contactless determining of the speed of a fluid flow and the concentration of at least one analyte therein, wherein a) the flow speed is measured by means of laser Doppler anemometry (LDA) using tracer particles which pass through an interference fringe pattern in the intersection region of two coherent monochromatic light beams and thereby generate a scattered light signal; and b) the concentration of the at least one analyte is measured by means of Raman spectroscopy, wherein a monochromatic light beam is radiated in and the Raman spectrum of the light inelastically scattered on the analyte molecules in the flow is recorded; wherein c) a single light source is used for both the LDA and the Raman spectroscopy, such that both measurements are carried out in the intersection region of two two coherent light beams coming from the light source, wherein the speed is measured by photons elastically scattered onto the tracer particles, and the concentration is measured by p

Abstract: The invention relates to a method for the contactless determining of the speed of a fluid flow and the concentration of at least one analyte therein, wherein a) the flow speed is measured by means of laser Doppler anemometry (LDA) using tracer particles which pass through an interference fringe pattern in the intersection region of two coherent monochromatic light beams and thereby generate a scattered light signal; and b) the concentration of the at least one analyte is measured by means of Raman spectroscopy, wherein a monochromatic light beam is radiated in and the Raman spectrum of the light inelastically scattered on the analyte molecules in the flow is recorded; wherein c) a single light source is used for both the LDA and the Raman spectroscopy, such that both measurements are carried out in the intersection region of two two coherent light beams coming from the light source, wherein the speed is measured by photons elastically scattered onto the tracer particles, and the concentration is measured by p

Abstract: A downhole-milling-tool method for milling through hard substances, such as barite, found in underground wells, providing a stepped increase of diameters and positioning of carbide cutters and appropriate positioning of fluid ports and channels, to provide removal of cuttings and cooling and lubricating of the cutting head, in turn providing more efficiency and a better rate of penetration (ROP).

Abstract: A downhole milling tool apparatus for use in milling through hard substances, such as barite, found in underground wells, providing a stepped increase of diameters and positioning of carbide cutters and appropriate positioning of fluid ports and channels, to provide removal of cuttings and cooling and lubricating of the cutting head, in turn providing more efficiency and a better rate of penetration (ROP).

Abstract: A downhole milling tool apparatus for use in milling through hard substances, such as barite, found in underground wells, providing a stepped increase of diameters and positioning of carbide cutters and appropriate positioning of fluid ports and channels, to provide removal of cuttings and cooling and lubricating of the cutting head, in turn providing more efficiency and a better rate of penetration (ROP).

Abstract: A downhole-milling-tool method for milling through hard substances, such as barite, found in underground wells, providing a stepped increase of diameters and positioning of carbide cutters and appropriate positioning of fluid ports and channels, to provide removal of cuttings and cooling and lubricating of the cutting head, in turn providing more efficiency and a better rate of penetration (ROP).

Abstract: A downhole pulsing-shock reach extender method for overcoming static friction resistance in coiled-tubing drilling-fluid-pressure driven downhole operations, by generating pulsed hydraulic shocks at the workstring by creating a fluid-hammer condition by repeated sudden opening and closing of a valve controlling a diverted portion of the flow of drilling fluid, while maintaining a constant flow of a portion of drilling fluid sufficient to operate and prevent damage to other components of the workstring, thereby extending the depth limit of downhole operations.

Abstract: A downhole pulsing-shock reach extender apparatus for overcoming static friction resistance in coiled-tubing drilling-fluid-pressure driven downhole operations, generating pulsed hydraulic shocks at the workstring by creating a fluid-hammer condition by repeated sudden opening and closing of a set-pressure snap-acting valve, using an essentially constant or slowly changing normal drilling-fluid pressure that will not damage other components of the workstring, thereby extending the depth limit of downhole operations. A poppet and calibrated spring act as a set-pressure snap-acting valve, and a tapering constriction and constricted throat in the main flow of drilling fluid or mud builds up higher pressure to open the valve, while bypass portways allow for limited flow and equilibration around the valve.

Abstract: A downhole fluid-pressure safety bypass for coiled-tubing operations, which diverts excessively pressurized drilling fluid directly into the annulus, protecting the fluid motor and similar downhole equipment from damage or reduced function, while allowing greater fluid pressures to be used up-hole for purposes such as increasing the flushing of cuttings up the annulus.

Abstract: A downhole pulsing-shock reach extender apparatus for overcoming static friction resistance in coiled-tubing drilling-fluid-pressure driven downhole operations, generating pulsed hydraulic shocks at the workstring by creating a fluid-hammer condition by repeated sudden opening and closing of a valve controlling a diverted portion of the flow of drilling fluid, while maintaining a constant flow of a portion of drilling fluid sufficient to operate and prevent damage to other components of the workstring, thereby extending the depth limit of downhole operations.

Abstract: A method of downhole fluid-pressure safety bypass for coiled-tubing operations, which diverts excessively pressurized drilling fluid directly into the annulus, protecting the fluid motor and similar downhole equipment from damage or reduced function, while allowing greater fluid pressures to be used up-hole for purposes such as increasing the flushing of cuttings up the annulus.

Abstract: A downhole pulsing-shock reach extender method for overcoming static friction resistance in coiled-tubing drilling-fluid-pressure driven downhole operations, generating pulsed hydraulic shocks at the workstring by creating a fluid-hammer condition by repeated sudden opening and closing of a set-pressure snap-acting valve, using an essentially constant or slowly changing normal drilling-fluid pressure that will not damage other components of the workstring, thereby extending the depth limit of downhole operations. A poppet and calibrated spring act as a set-pressure snap-acting valve, and a tapering constriction and constricted throat in the main flow of drilling fluid or mud builds up higher pressure to open the valve, while bypass portways allow for limited flow and equilibration around the valve.