619results about "Insulation" patented technology

The invention belongs to the technical field of oil and gas exploitation, and particularly relates to a low-yield well distributed optical fiber sound wave wellbore flow interpretation system and method based on thermal excitation. Downhole fluid is heated through a downhole heating device, and a thermal fluid slug with the temperature higher than that of unheated fluid is formed; the moving distance of the thermal fluid slug in the shaft in unit time is tracked by drawing an optical fiber strain response diagram, and the downhole fluid flow speed can be obtained. The shaft flow interpretation method is small in underground flow interference and obvious in optical fiber signal response, the technology is simple and easy to implement, and the problem that signals of the DAS in a low-yield well are not obvious can be effectively solved.

The invention discloses a concentric tube geothermal well structure capable of improving heat exchange efficiency. The concentric tube geothermal well structure comprises a first well opening section and a second well opening section. The first well opening section comprises a first casing pipe, and first well cementation cement is arranged between the inner wall of the first well opening section and the first casing pipe; the second well opening section is provided with a second casing pipe, second well cementation cement and a central casing pipe; a distance is arranged between the second casing pipe and the well wall of the second well opening section, second well cementation cement is arranged between the center casing pipe and the second casing pipe, a water stopping device is arranged at the upper end of the second well cementation cement and is of a reducing structure with the diameter sequentially increased from top to bottom, and the inner wall of the top end of the water stopping device is connected with the center casing pipe. The bottom end of the water stop device is connected with the second sleeve; a packing structure is arranged at the bottom end of the second well cementation cement, and a permeable section is arranged at the lower end of the packing structure. The invention further provides a construction method of the geothermal well structure. The structure is reliable, the heat exchange efficiency is improved, and the industrial long-term operation requirement is met.

Systems and methods of the present disclosure includes a mixer configured to mix air and hydrocarbons and a burner configured to receive the mixed air and hydrocarbons and to generate syngas. The system also includes a cooling system configured to receive the syngas and to cool the syngas to form cooled syngas. The system further includes a collector configured to collect carbon from the cooled syngas as soot. Moreover, the system includes a flare stack configured to receive the cooled syngas and to burn off at least part of the cooled syngas.

An apparatus for sampling landfill gas from a landfill flowing through a pipe. The apparatus may comprise: an enclosure configured to receive a section of the pipe; a gas sampling port in the section of the pipe; at least one sensor device disposed in a region of the enclosure, the at least one sensor being coupled to the section of the pipe through the gas sampling port; and thermal insulation positioned to retain heat from the section of the pipe in the region of the enclosure. A method of operating a landfill gas recovery system. The method may comprise: flowing gas from a well riser pipe through a sampling subsystem to a collection system; and heating a portion of the sampling subsystem with the gas flowing from the well riser pipe to the collection system.

The invention discloses a heat supply system for mine building heat supply and shaft freezing prevention, comprising: a heat collection module for collecting heat by using solar energy; the heat storage module exchanges heat with the heat collection module, is used for storing the heat source transferred by the heat collection module and can transfer the heat source to a heat terminal for the mining area building for heating around the clock; the power supply module is used for generating power by using solar energy and storing electric energy; and the wellhead heating modules are arranged at the shaft positions of the main inclined shaft and the auxiliary inclined shaft, and heat exchange is conducted between the wellhead heating modules and the heat storage module. The water source heat pump is used for heating the main inclined shaft and the auxiliary inclined shaft, comprehensive utilization of energy is achieved, a photovoltaic renewable power source is built in combination with the mining area space to provide clean power for mining area heat supply and power utilization systems such as the water source heat pump, and when the mining area power load and the heating load are low in the non-heating season, the water source heat pump can be used for heating the heat storage system. Zero-carbon heat supply for mine area building heat supply and shaft freezing prevention is achieved.

A control system for controlling extraction of landfill gas from a landfill via a gas extraction system comprising well piping, the landfill gas having a first temperature when extracted, the control system comprising: a gas composition chamber coupled to the well piping and comprising at least one sensor configured to measure one or more characteristics of a landfill gas sample in the gas composition chamber; a temperature control mechanism configured to heat the landfill gas sample in the gas composition chamber to a second temperature at least a threshold amount greater than the first temperature; and a controller configured to control the at least one sensor to measure the one or more characteristics of the landfill gas sample in the gas composition chamber when a temperature of the landfill gas sample in the gas composition chamber is at least the threshold amount greater than the first temperature.

Systems and methods for generating and a controller for controlling generation of geothermal power in an organic Rankine cycle (ORC) operation in the vicinity of a wellhead during hydrocarbon production to thereby supply electrical power to one or more of in-field operational equipment, a grid power structure, and an energy storage device. In an embodiment, during hydrocarbon production, a temperature of a flow of wellhead fluid from the wellhead or working fluid may be determined. If the temperature is above a vaporous phase change threshold of the working fluid, heat exchanger valves may be opened to divert flow of wellhead fluid to heat exchangers to facilitate heat transfer from the flow of wellhead fluid to working fluid through the heat exchangers, thereby to cause the working fluid to change from a liquid to vapor, the vapor to cause a generator to generate electrical power via rotation of an expander.

Provided is a method for setting a downhole tool, and a downhole localized heater. The method, in at least one aspect, includes positioning a downhole tool within a wellbore, the downhole tool including expandable metal configured to expand in response to hydrolysis, and positioning a downhole localized heater within the wellbore, the downhole localized heater being proximate the expandable metal. The method additionally includes subjecting the expandable metal to a wellbore fluid to expand the expandable metal into contact with one or more surfaces while activating the downhole localized heater to create a temperature spike and accelerate an expansion of the expandable metal.

The utility model discloses a millimeter wave deep well drilling platform, which belongs to the technical field of drilling equipment and comprises a drilling machine, a drilling rod and a gyrotron, the drilling machine and the gyrotron are arranged above the ground surface, one end of the drilling rod is connected with a drilling winch on the drilling machine, and the other end of the drilling rod extends into the ground from a drilling well. The drill rod comprises a drill rod shell and a waveguide tube in the drill rod shell, one end of the waveguide tube is communicated with the waveguide collector, the other end of the waveguide tube is provided with an opening and extends into the ground along with a drill bit of the drill rod, and the gyrotron is provided with a dynamic waveguide and movably connected with the waveguide collector through the dynamic waveguide. The dynamic waveguide comprises a waveguide leading-in pipe, a tail pipe and a plurality of groups of waveguide transmission pipes which are connected in sequence, and a plurality of millimeter wave reflection devices are arranged in the dynamic waveguide. Millimeter wave drilling is utilized, the problems of drill bit abrasion, replacement and the like in traditional drilling are solved through millimeter wave drill bit drilling, and the drilling cost is reduced.

In some implementations, a plurality of thermoelectric devices may be arranged to cool one or more components of a downhole drilling component during drilling operations. A current can be applied to one or more thermoelectric devices to generate a cooling effect. The thermoelectric devices can be located and arranged so that they cool some or all of a bottom hole assembly or components thereof, such as one or more sensors, batteries, processors, electrics, and the like. The thermoelectric devices also may be located and arranged to cool sensors, batteries, other downhole components, and / or drilling mud in a wellbore during drilling operations. A plurality of thermoelectric devices may be used to generate electric power downhole from a temperature difference. The electric power may be used to power sensors, processors, charge batteries, and be used by one or more downhole electric components, such as those in a bottom hold assembly. One or more thermal storage devices may be used with the thermoelectric devices to store thermal energy for use when needed. A control system may be used to control the activation and / or deactivation of one or more thermoelectric devices to provide cooling when desired.

A heater cable is disposed through a wellhead assembly into a production tubing string and is lowered such that it is at least partially immersed within a volume of a well kill fluid. Prior to the immersion, a density of the well kill fluid relative to the produced fluids at the downhole end is such that the volume of well kill fluid prevents the flow of the produced fluids from the subterranean zone into the production tubing string. An electric current is flowed though the heater cable, and the heater cable converts the electric current to heat energy. The heat energy is transferred by conduction to the kill fluid thereby reducing the density of the well kill fluid relative to the produced fluids such that the well kill fluid rises in an uphole direction through the production tubing string.

The invention provides an SAGD underground heater intelligent energy supply system based on multi-energy complementation, and belongs to the technical field of thickened oil recovery, and the SAGD underground heater intelligent energy supply system comprises a new energy power generation module which is used for generating power by using solar energy and / or wind energy; the energy storage module is used for storing electric energy when the new energy power generation module generates excessive power and releasing the electric energy to the underground heater module when the new energy power generation module generates insufficient power; and the intelligent control module is used for regulating and controlling the new energy power generation module, the energy storage module and the underground heater module according to the power generation data of the new energy power generation module, the energy storage state data of the energy storage module and the operating parameters of the underground heater module which are acquired in real time. The system has the advantages that new energy power generation and energy storage are organically combined, and smooth output and efficient utilization of energy are achieved; system operation data are monitored and analyzed in real time, an energy distribution strategy and operation parameters of an underground electric heater are dynamically adjusted, accurate heating is achieved, the energy utilization efficiency is improved, and energy consumption and carbon emission are reduced.

The invention discloses a seabed shallow casing section thermal insulation structure for polar region supercritical carbon dioxide drilling, which comprises a casing, a thermal insulation coating, a protective coating, an annular cement slurry layer, an electric heating pipe, a sensor module, a wireless conductive module, a ground system and a seabed wireless transmission module, and is characterized in that the electric heating pipe is fixed on the outer wall of the casing through a hoop; the outer wall of the casing pipe is sequentially coated with a heat preservation coating, a protective coating and an annular cement paste layer from inside to outside, the wireless conductive module is integrated at the end of the casing pipe, and the ground system comprises a ground data acquisition system and a ground control center. The sea surface platform is provided with a ground data acquisition system and a ground control center which are connected with the seabed wireless transmission module through an umbilical cable, and temperature and pressure data acquired by the sensor module are uploaded to the ground control center. According to the invention, the problems of rapid heat loss, annular air channeling, casing mechanical property degradation, poor drilling fluid fluidity and the like of the seabed shallow casing section in the polar region extreme low-temperature environment are solved.

The invention discloses self-adaptive variable-diameter drilling equipment for a high and cold frozen soil region and a stable-temperature construction method, and relates to the technical field of constructional engineering construction equipment, in particular to the self-adaptive variable-diameter drilling equipment for the high and cold frozen soil region, the self-adaptive variable-diameter drilling equipment comprises a main body, and the top of the main body is fixedly connected with a drilling assembly; a multi-blade structure is utilized, each blade is provided with an independent electric heating wire, the electric heating wires can preheat the blades in the drilling process, the blades are prevented from being embrittled due to low temperature, the service life of the drill bit is prolonged, the multiple telescopic auxiliary rotary drill bits are evenly distributed around the main drill bit, and the drilling efficiency is improved. The telescopic rod controls the auxiliary rotary drill bit to automatically adjust the telescopic length of the auxiliary rotary drill bit according to the hardness of the frozen soil layer and the drilling depth, so that the total diameter of the drill bit is changed to meet the drilling requirements of different diameters.

The invention provides an underground electric heating steam generator and a steam generation system, and belongs to the field of oil and gas field exploitation. The underground electric heating steam generator comprises an underground steam generating mechanism, the underground steam generating mechanism comprises an outer protective pipe and a plurality of heating pipes, the heating pipes are arranged in the outer protective pipe, and a first cavity is formed between the inner wall of the outer protective pipe and the outer walls of the heating pipes; the heating pipe comprises a heating body, and the heating body comprises a wire section and a heating section which are integrally formed; the underground electric heating steam generating system comprises an underground electric heating steam generator, a power adjusting device, a parameter collecting device, a hydroelectric sealing device, a water purifying device and a high-pressure bearing sealing wellhead. Steam is obtained underground, the problem of heat loss caused by ground steam conveying is solved, and the dryness of the steam is guaranteed; steam is obtained by electrically heating the heating body, and the technical problem that a large amount of carbon dioxide is generated due to the fact that a coal-fired boiler obtains steam is solved.

The invention discloses an electric heating and heat preservation system and method for a deep-sea gas production seabed wellhead flow channel cold point, which are used for solving the problems of natural gas hydrate generation and paraffin precipitation blockage caused by low temperature and throttling of a deep-sea gas production underwater wellhead and an underwater gas production tree flow channel and ensuring efficient and stable operation of deep-sea gas production operation. An electric heating and heat preservation system for a deep sea gas production seabed wellhead flow channel cold point comprises a cold point positioning system, an electric heating device and a control system. The cold spot positioning system performs real-time data acquisition and preprocessing by constructing a temperature sensor network for key cold spots of an underwater christmas tree runner, quantifies the positions and risk levels of the cold spots in combination with a probability statistical model, and provides an accurate targeted heating basis for the distribution positions of electric heating devices. A heating element of the electric heating device is arranged in a cold point area of an underwater christmas tree flow channel; the control system obtains data measured by the temperature sensors in the cold spot areas in real time, and whether the corresponding heating elements are started or not is determined according to the data.

The utility model relates to a drainage and gas recovery device formed by combining a cable laying pipe and an electric submersible pump, which is characterized by comprising a sleeve, and a cable laying pipe, a metal joint, a mechanical anchor, a connector and an electric submersible pump which are arranged in the sleeve and connected in sequence, the upper end of the cable laying pipe sequentially penetrates out of the wellhead device, the blowout preventer and the injector from bottom to top and then is configured with the power winding frame. A continuous oil pipe is replaced by the cable laying pipe, the cable laying pipe is tripped to a specified depth, the wax blockage, corrosion or scaling phenomenon of a speed pipe column can be solved, and stable production in the self-spraying period is guaranteed.

The invention belongs to the technical field of oil exploitation, and particularly discloses a sectional type electric heating auxiliary thickened oil exploitation system and method.The system comprises a power supply station, a voltage transformation power regulation cabinet, a junction box, an injection and production pry, a power supply section cable, a cable connector, a wellhead, a production sleeve, a main pipe, an auxiliary pipe, a heating section cable, a hanger and a screen pipe, the production sleeve is connected with a wellhead, the hanger is located in the production sleeve, the screen pipe is connected with the production sleeve through the hanger, the main pipe is located in the production sleeve, the auxiliary pipe is located in the production sleeve and the screen pipe, and the heating section cable is located in the auxiliary pipe. The heating section cable is composed of a central supporting line, a plurality of heating modules, a plurality of module spacing layers and a metal sheath from inside to outside, the plurality of heating modules are uniformly connected to the central supporting line in series, the plurality of module spacing layers are located between two adjacent heating modules, and each heating module is integrated with an SIC power switch. And the heating section cable is connected with the power supply section cable through a cable joint.

A method of cooling at least a portion of a downhole tool located within a drilled wellbore using a fluid pill configured to transfer heat away from a heat-generating segment of the downhole tool. The downhole tool may be a wireline logging tool. The fluid pill can comprise at least one fluid coolant and may include other additives such that the heat transfer properties of the fluid pill are superior to those of one or more fluids present in the drilled wellbore. The fluid pill can be introduced into residual drilling mud in the wellbore, and the downhole tool may thereafter be operated with the heat-generating segment thereof in fluid contact with the fluid pill, whereby heat generated by the heat-generating segment is transferred away from the downhole tool and toward a wall of the wellbore by the fluid pill.

Systems and methods disclosed herein may comprise a bottom hole assembly; and a cable disposed in the wellbore. In examples, the cable may comprise a superconducting material configured to provide at least power to the bottom hole assembly; one or more liquid supply channels configured to supply a fluid to reduce temperature of the superconducting material; and one or more liquid return channels. Further, cryogenic liquid may be pumped through the liquid supply channels.

Provided is a method for setting a downhole tool, and a downhole localized heater. The method, in at least one aspect, includes positioning a downhole tool within a wellbore, the downhole tool including expandable metal configured to expand in response to hydrolysis, and positioning a downhole localized heater within the wellbore, the downhole localized heater being proximate the expandable metal. The method additionally includes subjecting the expandable metal to a wellbore fluid to expand the expandable metal into contact with one or more surfaces while activating the downhole localized heater to create a temperature spike and accelerate an expansion of the expandable metal.

The invention relates to the technical field of oil field shaft unblocking processes, in particular to a treatment method and equipment for a non-pressure-relief channel well. According to the non-pressure-relief channel well treatment method and equipment, power frequency current is converted into low-frequency surge bidirectional pulse current, then the low-frequency surge bidirectional pulse current is input into a shaft oil casing to be heated and unblocked, after the underground oil casing is heated by current for a period of time, a cleaning agent is injected into an annular space of the oil casing at high pressure, and blockages in a well are washed and dissolved; a continuous well washing channel is cleaned in the pressure-relief-channel-free well, blockages are dissolved along the well washing channel and taken out of a well opening, and paraffin removal and blockage removal treatment on the pressure-relief-channel-free well is achieved. According to the non-pressure-relief channel well treatment method and equipment, the underground metal pipe is prevented from being damaged through the low-frequency surge bidirectional pulse current, a well washing channel can be cleaned by injecting the cleaning agent into the well in a matched mode, well washing and paraffin removal work is conducted on the target well, overhaul work is not needed, the work input cost is low, and the paraffin removal effect is good.

The utility model relates to the field of oilfield development, in particular to a double-hollow sucker rod heating device which comprises a heating tank, a sucker rod assembly, a stirring assembly, a heating assembly, a flow guide pipe, a threaded sleeve, a feeding hopper, a first hydraulic controller and a liquid discharging pipe. The heat conduction layer and the heat preservation and insulation layer are arranged in the inner pipe and the outer pipe of the sucker rod respectively, heat transfer between a heat carrier and the sucker rod can be enhanced through the heat conduction layer, it is ensured that heat can be efficiently transferred to the underground, heat loss of the heat carrier in the flowing process can be reduced through cooperation of the heat preservation and insulation layer, and the service life of the sucker rod is prolonged. The heating assembly capable of sensing the temperature of the heating carrier in the heating device in real time is arranged, and the heating temperature can be flexibly adjusted according to the actual temperature change of the heat carrier liquid to achieve rapid temperature rise of the heat carrier liquid; and the stirring assembly is arranged, so that the heat carrier liquid flowing back into the heating device can be quickly and uniformly stirred in a rotary stirring mode to accelerate temperature rise.

The well mouth electromagnetic heating device comprises a shell, the shell is of a hollow structure, an insulating layer is fixedly installed on the inner wall of the shell, a spiral electromagnetic induction coil is fixedly installed on the inner wall of the insulating layer, an inner ring of the electromagnetic induction coil is installed on a heat preservation layer in a winding mode, and a heating tank is fixedly installed on the inner wall of the heat preservation layer. The stirring column and the metal rod rotate along with the rotating rod to stir liquid in the heating tank, so that different parts of the liquid are fully mixed, the metal rod generates induction heat under the action of a magnetic field, the heat can be diffused in the liquid more quickly and uniformly, the phenomenon of temperature stratification is avoided, and the heating uniformity is further improved. Cleaning liquid is injected into the first channel of the rotating rod through the connector, the cleaning liquid is sprayed out of the nozzle through the second channel, the sprayed cleaning liquid comprehensively cleans the interior of the heating tank, meanwhile, the scraping plate can scrape the inner wall of the heating tank in the stirring process, and impurities or precipitates in the liquid are prevented from being attached to the inner wall.

The present invention relates to a downhole heater assembly comprising at least one heating tool with a delivery support connection point, by which the heating tool is connectable to delivery means via a delivery support such that said heating tool can be delivered to and retrieved from a downhole target region of a borehole. The assembly is provided with a baffle that is configured to be positionable in the borehole at a location between said heater tool and said delivery means. When in position said baffle acts to restrict the movement of heated fluids produced during the operation of the heating tool so as to at least partially replicate the fluid flow conditions found in the test vessel in which the heating tool's configuration was originally tested. The present invention also provides associated methods that employ a baffle between a heating tool and the above ground delivery means used to deploy the heating tool downhole.

Igniter assemblies for use with setting tools are disclosed. The igniter assemblies have an electronic heating element disposed adjacent to an energetic material within a setting tool. In some embodiments, the electronic heating element is a resistor or a PCB mounted resistor. Electrical connections are attached to the heating element to provide electrical current to activate the heating element. In some instances, the electrical heating element is disposed onto an insulator cap that is coupled to a pressure block attached to the setting tool, and in some instances the electronic heating element is attached to a non-explosive portion and the energetic material is disposed within an explosive portion. When the non-explosive portion and the explosive portion are assembled, the electronic heating element is adjacent to the energetic material. Other assemblies are described.

An electric submersible pump includes a heat exchanger, a shaft comprising an axial bore, and a motor, which includes a rotor rotationally coupled to the shaft, a stator concentrically disposed with respect to the rotor, and a journal bearing disposed between the stator and the shaft. There is a gap between the rotor and the stator. The electric submersible pump further includes a first pump mechanically coupled to the shaft and configured to pump production fluid through a tubular, and a second pump mechanically coupled to the shaft and configured to pump coolant through the axial bore, the gap, and the heat exchanger. The heat exchanger transfers heat from the coolant to the production fluid to cool the motor.

A system and method are provided for installing a well for a borehole heat exchanger. The method includes drilling a hole formation to a predetermined depth relative to a ground surface, including operating a bottomhole assembly (BHA) including a drill bit supported at a bottom end of a cable positioned within a flexible tube. After drilling the hole formation to a predetermined depth, the BHA is retracted through the flexible tube to remove the BHA from the hole formation while the flexible tube remains in the hole formation.

The utility model relates to the technical field of oil extraction pipes, in particular to an injection-production pipe for an electric heating heavy oil well. The injection-production pipe of the electric heating heavy oil well comprises an injection-production well pipe body, the outer wall of the injection-production well pipe body is sleeved with symmetrically-distributed supporting discs, and heat preservation assemblies are installed on the supporting discs and the injection-production well pipe body. According to the injection-production pipe of the electric heating heavy oil well, in the using process, the heat preservation barrel arranged outside the end opening of the injection-production well pipe in the heat preservation assembly in the sleeving mode can cover the end of the injection-production well pipe for heat preservation, and therefore the probability that the end opening of the injection-production well pipe is frozen when the air temperature is relatively low in winter can be reduced, and the service life of the injection-production well pipe is prolonged. And the influence on later oil extraction is reduced.

An exposed resistive heating element is coupled to an electric power supply. The exposed resistive heating element is malleable such that it can be wrapped around a component to be heated. A controller is coupled to the power supply and the exposed resistive heating element. The controller is configured to regulate current exchanged between the exposed heating element and the electric power supply.