Abstract:
In the process disclosed, the areas affected by incrustation in water-carrying pipes, in particular pipes (6, 30) in fountains, are exposed to ultrasonic radiation, the acoustic-energy source being designed so that it can move inside the filter pipe over the areas to be dealt with or it can be rigidly mounted. The device for carrying out this process has at least one oscillator plate (14, 24) with an oscillator element (18, 25). An aperture extending through the device in the axial direction allows the water to pass, thus making it possible to use the device while the water is still running. The oscillator plates (14, 24) are conveniently disposed in a star together with their associated oscillator elements (18, 25) about an axis and designed as a single assembly, the ultrasonic radiation being directed radially outwards and/or inwards.
Abstract:
A method of electrically logging a section of a wellbore includes circulating a wellbore fluid within the wellbore, the wellbore fluid including a base fluid; and a crosslinked and branched polymeric fluid loss control agent formed from at least an acrylamide monomer and a sulfonated anionic monomer; wherein the fluid loss control agent has an extent of crosslinking that is selected so that the fluid loss control agent has a viscosity that is within a peak viscosity response of the viscosity response curve; placing within the wellbore a wellbore logging tool capable of applying an electrical current to the wellbore; applying electrical current from the logging tool; and collecting an electrical log of the portion of the wellbore that has had electrical current applied thereto.
Abstract:
A method may include circulating a breaker fluid into a wellbore having a filtercake on the walls thereon, the filter cake including copolymer formed from at least one acrylamide monomer and at least one sulfonated anionic monomer, the breaker fluid comprising: a base fluid; and a mixture of hydrolysable esters of dicarboxylic acids.
Abstract:
A system (1) for stimulating a well with an annulus (3) formed by a string (2) and a wellbore (4), wherein the system (1) comprises a pressure activated injection assembly (200) configured to open at an activation pressure below an injection pressure and a mechanically operated sand control assembly (100) configured to flush the annulus (3) after injection. The system (1) comprises a pressure activated flushing device (500) mounted uphole from the injection assembly (200) and configured to open radial flush ports (501, 502) between the interior of string (2) and the annulus (3) at a flushing pressure above the injection pressure. An optional release mechanism for the pressure activated injection assembly (200) is also disclosed.
Abstract:
In accordance with embodiments of the present disclosure, a debris separator device for use with a casing system may include an impeller having a plurality of blades to generate a vortex of mud in the section of the casing system when the casing system is lowered into a wellbore. The device may also include a baffle disposed in the section of the casing system, the baffle having an annular cup shape that forms an outer circumferential pocket to capture debris from the vortex of mud. The impeller and baffle may enable the debris separator device to separate debris and other debris from a flow of mud through the casing system so that the debris does not clog a float collar of the system. The disclosed debris separator device may be flushable so that the device does not become clogged with debris and can thereby maintain auto-fill through the casing system.
Abstract:
A fluidic oscillator assembly can include at least one fluidic oscillator, and a closure that in one position prevents flow through the oscillator to an exterior of the assembly, and in another position permits flow through the oscillator to the exterior. A method can include flowing fluid longitudinally through a fluidic oscillator assembly in a well, then diverting the fluid to flow outward from the assembly via at least one fluidic oscillator, the fluid being prevented from flowing longitudinally through the assembly. A well system can include a drill string having a fluidic oscillator assembly, a drill bit, and a drilling motor disposed between the drill bit and the assembly. The assembly can include a closure that in one position prevents fluid flow through a fluidic oscillator to an annulus formed between the drill string and a wellbore, and in another position permits fluid flow through the oscillator.
Abstract:
A method for pulling casing pipes / liner (0) in a petroleum well, comprising the steps of: a) perforating an actual section (0p) of said casing pipe (0) in said well by means of a perforating gun (1), and then b) washing, by means of a washing tool (2) in at least one casing pipe annulus outside the perforated section of said casing pipe (0p) for removing debris material, particles, cement or other bonding substances which otherwise hold said casing pipe section (0) stuck. c) cutting, by means of a cutting tool (3) said casing pipe within or below the perforated section (0p) for releasing it from the deeper residing, remaining portion of said casing pipe in said well. d) pulling said released, washed-out section of said casing pipe (0) out of said well.
Abstract:
A method for pulling casing pipes / liner (0) in a petroleum well, comprising the steps of: a) perforating an actual section (0p) of said casing pipe (0) in said well by means of a perforating gun (1), and then b) washing, by means of a washing tool (2) in at least one casing pipe annulus outside the perforated section of said casing pipe (0p) for removing debris material, particles, cement or other bonding substances which otherwise hold said casing pipe section (0) stuck. c) cutting, by means of a cutting tool (3) said casing pipe within or below the perforated section (0p) for releasing it from the deeper residing, remaining portion of said casing pipe in said well. d) pulling said released, washed-out section of said casing pipe (0) out of said well.
Abstract:
A flushing tool for a perforated tubing in a production tubing string is described. The flushing tool includes a chamber that is sealed at a pressure at or below atmospheric pressure when the flushing tool is in its sealed configuration, the chamber arranged to receive wellbore fluids when the flushing tool is in its activated configuration. A port allows ingress of wellbore fluids into the chamber when the flushing tool is in its activated configuration. A sealing means has a first position when the flushing tool is in its sealed configuration and a second position when the flushing tool is in its activated configuration. An actuator releases the flushing tool from its sealed configuration to its activated configuration by releasing the sealing means to move from the first position to the second position.