233results about "Thermal drilling" patented technology

A pulse generating system includes a primary capacitor positioned along a primary side of a pulse generating circuit, and configured to store electrical energy, and a primary switch positioned along the primary side. The pulse generating system also includes a pulse transformer configured to step up voltage from the primary side to a secondary side of the pulse generating circuit; an output capacitor; and a secondary switch positioned in the secondary side, wherein the output capacitor is electrically coupled to the pulse transformer through the secondary switch.

Disclosed embodiments relate to a pulsed-power drilling system, in which a pulsed-power drill is conveyed downhole and operated via coiled tubing. The coiled tubing may be configured to simultaneously transmit power and drilling fluid downhole. For example, the coiled tubing may include a flexible hollow fluid tube configured to transport drilling fluid therein, and a flexible cable tube disposed within the fluid tube. The cable tube may have one or more cable disposed within protective tubing, protecting the cables from drilling fluid in the fluid tube. Methods of making and using such coiled tubing with pulsed-power drills are also disclosed.

The invention belongs to the technical field of moon sampling, and provides a casing type laser-assisted coring drilling tool for a moon-based extreme environment, which comprises a drill bit, a base, a laser head, a drill rod, a coring pipe and a motor, the bottom of the base is rotatably connected with a drill rod. The bottom of the drill rod is fixedly connected with a drill bit. A coring pipe is coaxially arranged in the drill rod, and an annular cavity is formed between the outer side face of the coring pipe and the inner side face of the drill rod. A laser head is mounted in the base; the laser head is located above the annular cavity, and laser emitted by the laser head penetrates through the annular cavity and is emitted out of the drill bit. Aiming at the lunar-based environment, through the synergistic mechanism of mechanical rotary rock breaking and laser-assisted softening, the lunar rock is softened by means of laser energy, the mechanical cutting resistance of the drill bit is greatly reduced, and efficient and continuous coring operation is achieved; the key technical problems that a traditional drilling tool is difficult in space arrangement, low in efficiency and the like are solved, and the efficiency of the lunar geology coring task and the rock sample fidelity are remarkably improved.

A method to improve performance of a pulsed power drilling tool includes determining energy transferred to a bit of a pulsed power drilling tool. In response to a determination that the energy transferred to the bit is not greater than an energy threshold within a threshold period of time, the method also includes monitoring voltage of a primary capacitor of the pulsed power drilling tool during a subsequent resonance cycle. In response to a determination that the voltage of the primary capacitor is above a voltage threshold, the method further includes toggling a primary switch that is electrically connected to the primary capacitor to maintain energy captured by the primary capacitor, charging the primary capacitor from a stored voltage to an operating voltage during a subsequent cycle.

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.

Novel hybrid tunnel boring methods, systems, and apparatuses are described. Example hybrid methods integrate (a) thermal processing, e.g., preconditioning and / or thermal spallation (which may be used as pre-treatment), and (b) mechanical processing while boring tunnels in rock and other formations. Thermal processing and mechanical processing may be used alternatively or simultaneously. For example, the preconditioning may use thermal energy to induce thermal shock and weaken the rock (e.g., cause expansion stress, micro-fractures, thermal spallation, etc.). This preconditioning changes the relevant properties of the rock relative to the additional (e.g., mechanical) excavation, including, among other things, effective compressive stress, abrasion properties, and hardness. This preconditioned rock can therefore be efficiently removed using mechanical drilling tools, resulting in, for example, faster boring speeds, reduced tool wear, enhanced precision, and longer deployment lengths (e.g., in comparison to conventional TBM and especially MTBM approaches).

The invention discloses an ice layer aperture self-adaptive hot water reaming drilling tool, and belongs to the technical field of polar region ice layer drilling. Comprising a hot water hose tail flange piece, a flange adapter piece, a first fixing sleeve, a first center pipe, a first limiting sleeve, a first sliding block, a first spraying cavity, a first spring, a first spring supporting block, a second spring supporting block, a second center pipe, a second spring, a second spraying cavity, a second sliding block and a second limiting sleeve which cooperate with one another. The device comprises a first fixed sleeve, a second fixed sleeve, a nozzle connecting piece, a first nozzle, a second nozzle, a third nozzle, a first pulley connecting rod composite mechanism and a second pulley connecting rod composite mechanism, in the descending and ascending reaming process, the drilling tool is triggered by the drilling form to autonomously perform descending and ascending reaming operation; the technical problems that in the drilling tool reaming process after a main drilling hole of polar region hot water drilling is completed, in drilling tool reaming, drilling tool descending reaming is prone to causing uneven hole diameter, and drilling tool jamming accidents are caused by ice hole shrinkage in drilling tool ascending are solved.

Systems and methods include a laser tool for ablating solid materials in a wellbore. The laser tool includes a housing having a first end and a second end opposite the first end; a laser head attached to a side of the housing between the first end and the second end. The laser head is optically coupled to a laser source and includes optical elements configured to focus a laser beam to ablate the solid materials. The laser tool includes a packer adjacent to the first end of the housing configured to form a seal between the housing and interior surfaces of the wellbore; and a fluid having a lower optical absorption at a wavelength of the laser source than an optical absorption of fluids in the wellbore, the fluid configured to surround the laser head, contact the packer, and permit the laser beam to propagate to ablate the solid materials.

The application discloses a tunnel laser drilling device and relates to the technical field of tunnel drilling. The device comprises a first positioning device for laser positioning of a top hole, a second positioning device for laser positioning of a side wall hole, an auxiliary arm drilling device, a work platform for rotary and lifting movements, and a control device. The auxiliary arm drilling device is used for drilling operation of the top hole and the side wall hole. The first positioning device, the second positioning device, the auxiliary arm drilling device, and the work platform are all connected with the control device. The device can realize quick and accurate positioning and drilling operation, and is also beneficial to reducing the labor intensity of operators.

The invention belongs to the technical field of lunar exploration equipment, and provides a step-by-step laser-assisted rock breaking drilling tool and method for a lunar-based extreme environment, the drilling tool comprises a conversion disc, a rock drilling tool and a laser head, the laser head and the rock drilling tool are integrated in the same drilling tool structure through the conversion disc, laser or mechanical rock breaking modes can be switched according to working conditions, and the laser or mechanical rock breaking modes can be switched according to the working conditions. And step-by-step rock breaking is realized. The drilling tool is suitable for extreme environments such as low gravity, vacuum, high dust and severe temperature change of the moon, has the advantages of being compact in structure, flexible in switching and high in energy utilization rate, and can be widely applied to tasks such as lunar soil stripping, lunar rock mining, underground structure detection and lunar base construction.

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.

An electro-crushing drill bit is to drill a wellbore, wherein the electro-crushing drill bit comprises a bit body; a ground structure coupled to the bit body; and at least one electrode coupled to a power source and the bit body, the at least one electrode positioned within the ground structure, wherein the at least one electrode comprises, a fixed plate; and a movable plate that is movable relative to the fixed plate.

A combined drill bit based on the electro-pulse-drilling technology includes a PDC bit, a ground electrode, a high-voltage electrode, a high-voltage electrode spring, an electrode drill bit spring, electrode screws, an insulating rod, an insulating spline sleeve, a high-voltage cable connector, an insulating limit cover, a lower bearing, an upper bearing, an end cover, and a conical connecting component. The combined drill bit combines the PDC bit and the electro-pulse-drilling technology, can not only overcome shortcomings of poor wall quality and difficulty in controlling borehole trajectory in process of electro-pulse drilling, but also improve the efficiency of deep-well drilling.

The technology disclosed relates to a pulsed power drilling system 100 for breaking a mineral substrate 400 and to a method for breaking a mineral substrate 400 by passing a pulsed electrical current through the mineral substrate 400. The disclosed pulsed power drilling system 100 and method 500 using microwave radiation for affecting the electric field and electric charge distribution inside ionizable inclusions in the mineral substrate 400 to create localized ionizations inside the mineral substrate 400. The disclosed pulsed power drilling system 100 and method 500 may for example be applied in rock drilling, concrete processing, mineral processing, and continuous mining. The present disclosure further relates to a drill rig 600 comprising a pulsed power drilling system 100, a computer program product comprising instructions, and the use of a pulsed power drilling system 100.

A system for performing subsurface laser perforation includes a tubing deployed within a wellbore including a target layer for perforation, the tubing in communication with a surface location, and a slim laser subsurface tool operatively coupled to the tubing, the laser subsurface tool including a body coupled to the tubing, a telescoping laser head disposed within the body and including a plurality of nested segments, a smallest of the plurality of nested segments defining an orifice at an output end of the telescoping laser head, and a lens supported by the smallest of the plurality of nested segments and covering the orifice at the output end.

This invention discloses a novel combined microwave-drilling device for hard rock, belonging to the field of rock breaking technology. It includes a ground control system and a microwave generator. One end of the ground control system is connected to the microwave generator; a power box is connected to the bottom of the microwave generator, and a rock-breaking motor is installed inside the power box. The drilling tool of this invention consists of a pre-drilling small drill bit and a reaming large drill bit. The pre-drilling small drill bit acts as a pilot tool, drilling a guide hole on the rock surface through high-speed rotation. Simultaneously, it utilizes the local high stress concentration effect of its cutting edge to pre-damage the rock mass surrounding the hole wall, forming a micro-crack network, significantly reducing the integrity and strength of the rock mass. The reaming large drill bit efficiently enlarges the drilling cross-section of the weakened rock mass. Through the synergistic effect of mechanical fracturing and microwave thermal assistance, the drilling cross-section is rapidly enlarged, while reducing energy loss and tool wear during pure mechanical drilling.

Systems and methods include a laser tool for ablating solid materials in a wellbore. The laser tool includes a housing having a first end and a second end opposite the first end; a laser head attached to a side of the housing between the first end and the second end. The laser head is optically coupled to a laser source and includes optical elements configured to focus a laser beam to ablate the solid materials. The laser tool includes a packer adjacent to the first end of the housing configured to form a seal between the housing and interior surfaces of the wellbore; and a fluid having a lower optical absorption at a wavelength of the laser source than an optical absorption of fluids in the wellbore, the fluid configured to surround the laser head, contact the packer, and permit the laser beam to propagate to ablate the solid materials.

A wellbore is drilled in a subterranean zone with a drill bit of a drilling string. The drilling string includes tubing and a fluid separator uphole of the drill bit. While drilling, a drilling fluid is flowed through an interior of the drilling string and through the fluid separator. The fluid separator separates, from the drilling fluid, a fluid stream having a higher water-to-oil ratio than a remainder of the drilling fluid Uphole of the drill bit, the fluid stream is diverted from the fluid separator to an annulus around the exterior of the drilling string based on a specified temperature of a drilling string component while the remainder of the drilling fluid flows from the fluid separator to the drill bit.

The application provides a laser rock breaking drilling tool protection device, and belongs to the technical field of laser rock breaking, which comprises a shell, a cavity for accommodating a laser head is formed in the shell, a through hole is formed in the shell, a lens is installed in the through hole, the lens is used for allowing a light source of the laser head to pass out while preventing rock debris from entering the shell to damage the laser head, a cleaning structure is used for cleaning the outer side surface of the lens away from the laser head to prevent rock debris from adhering to the lens, a protection structure is used for protecting the lens to prevent rock debris from impacting the lens to cause scratches on the lens, the protection structure comprises a movable protective cover, the protective cover has a protection position and a working position on its movable stroke, the shell can isolate gas and liquid pollutants, the laser head is installed in the protective shell, the laser head can normally work in a harsh environment such as dust and water, and the service life of the laser head is reduced due to the impact in the pressure environment in the working and standby states.

The invention discloses a high-voltage pulse liquid electric rock breaking device, which relates to the technical field of well drilling, and comprises a main body structure comprising transformer oil, and an insulating cylinder, a cylinder body and a drill rod which are connected in sequence, the top of the cylinder body is open, the top of the cylinder body is in threaded connection with the bottom end of the insulating cylinder, and a cavity is formed between the bottom end of the insulating cylinder and the inner wall of the cylinder body; the transformer oil is filled in the cavity; the first high-voltage electrode stem is vertically arranged in the insulating cylinder in a penetrating manner, and the bottom end of the first high-voltage electrode stem extends into the cavity; the second high-voltage electrode rod is sleeved with the drill rod, the top end of the second high-voltage electrode rod extends into the cavity, the bottom end of the second high-voltage electrode rod is connected with a drill bit, the drill bit extends out of the drill rod, and the second high-voltage electrode rod and the first high-voltage electrode rod are connected into a homopolar high-voltage power source. The method has the advantages that the uniformity of electric field distribution is improved, and the problem of electric field distortion is avoided.

The invention relates to a drill head (1) for a drilling tool, the drill head (1) extending along a longitudinal axis (Z) and comprising a drilling end (10) and an attachment end (11), wherein the attachment end (11) is configured to be fitted to the drilling tool, and wherein the drilling end (10) comprises a centre (10- A) and at least one pair of electrodes (100), wherein the at least one pair of electrodes (100) comprises a high-voltage electrode (100-1) and a ground electrode (100-2), wherein the high-voltage electrode (100-1) and the ground electrode (100-2) are radially aligned with the centre (10-A) of the drilling end (10), and wherein the drilling end (10) comprises at least one intermediate electrode (102) mounted between the high-voltage electrode (100-1) and the ground electrode (100-2), wherein the intermediate electrode (102) is mounted on an insulating support (104).

The systems and techniques described herein illustrate mass flow configurations for non-contact boring. Mass flow described herein may be utilized for various different purposes. In certain embodiments, a conical head may be disposed on the system of the non-contact boring system and may cause air to circulate in a manner that causes spoil to be airborne in front of the bore face, allowing for improved excavation of spoil generated by the non-contact boring.

An optical energy system includes a laser device (110) configured to output a laser beam (125); an array (125) of a plurality of sensors (102) radially positioned apart from a path of the laser beam, where each of the plurality of sensors is configured to capture energy scattered from a transversal energy (120) distribution of the laser beam and output an electric current at a value (206) in proportion to the captured energy; and a control system (400) communicably coupled to each of the sensors. The controller is configured to perform operations including aggregating the output electric currents from the plurality of sensors into a time-dependent array of electric current values; determining an anomaly in the laser beam based on at least one of (i) a shape of the laser beam, or (ii) digitized output electric current data from the electric current values; and controlling the laser device based on the determined anomaly in the laser beam.

The present disclosure relates to a rock drilling arrangement, a rock drilling rig and a method The rock drilling arrangement comprises a drill string extending along a central axis and a drill head comprising at least two electrodes located at a lower end of said drill string. The drill head is configured to be applied to a mineral substrate and form a drilled hole in the mineral substrate by passing a high voltage current pulse between the at least two electrodes via the mineral substrate. The rock drilling arrangement further comprises a cylindrical casing encompassing the drill head and encompassing at least a lower poron of the drill string extending along the central axis to the drill head. The rock drilling arrangement also includes a fluid transfer arrangement comprising a fluid supply conduit to supply a liquid fluid to an applicaon area of the drill head. The cylindrical casing has a posion aligned to the posion of the drill head and is configured to be adjacent to the mineral substrate during drilling.

A laser tool apparatus includes a tool body, an optical fiber cable disposed in the tool body, the optical fiber cable including a laser head that emits a laser beam, a shaping optic coaxially disposed downstream of the optical fiber cable, the shaping optic shaping the laser beam emitted from the laser head, and a flexible cable attached to the shaping optic. The flexible cable flexibly directs the laser beam to a desired angle within a borehole.

A pulsed power drilling system for breaking a mineral substrate and to a method for breaking a mineral substrate by passing a pulsed electrical current through the mineral substrate via at least one fluid volume that is at least partly ionized by use of microwave radiation. The disclosed pulsed power drilling system and method use microwave radiation for at least partly ionizing a fluid volume extending between an electrode and the surface of the mineral substrate and. The disclosed pulsed power drilling system and method may for example be applied in rock drilling, concrete processing, mineral processing, and continuous mining. The present disclosure further relates to a drill rig comprising a pulsed power drilling system and the use of a pulsed power drilling system.

The invention discloses a novel construction method and device for a rotary drilling rig. The novel rotary drilling rig utilizes a high-energy pulse power supply to excite a super-energy plasma torch, the plasma torch fuses rock, and the rock is efficiently drilled in cooperation with an alloy drill bit. According to a traditional rotary drilling rig, the gravity of a drilling tool is utilized, the downward probing force of a drilling rod acts on a drill bit, and hard cutting is conducted on rocks. According to the novel plasma drilling tool designed by the invention, hard cutting and electric blasting are fused, so that the drill bit can quickly enter rock, and the novel plasma drilling tool is an efficient and energy-saving rock breaking tool.

The invention relates to the technical field of steam drills, and discloses an integrated steam drill which comprises a drill rod, the drill rod comprises a drill bit, and a steam generator and a gas-liquid mixing assembly are sequentially arranged at the position, close to the drill bit, of the drill rod; the gas-liquid mixing assembly comprises a liquid storage part and a gas conveying pipeline capable of being communicated with an external high-pressure gas source, an atomizer is connected to the gas conveying pipeline, and a gas-liquid mixing cavity is formed in the atomizer. A coil pipe and a combustion mechanism are arranged in the steam generator, the inlet end of the coil pipe is communicated with the outlet end of the gas conveying pipeline, and the combustion mechanism is close to the coil pipe and can be communicated with an external gas source. The combustion mechanism heats the gas-liquid mixed medium in the coil pipe into steam by combusting gas; one end of the drill bit is connected with the steam generator, and the other end of the drill bit is provided with a nozzle communicated with the outlet end of the coil. The drill bit is directly connected with the steam generator, so that the heat loss of the steam in the conveying process can be reduced, and the working efficiency of the drill bit is ensured.

A system and method for applying an insulative coating to an inner surface of a coiled tubing. A tractor is mounted inside a coiled tubing, wherein the tractor includes a tractor body having a tractor propulsion system; and a spray head connected to the tractor body. The spray head is propelled along approximately an entire length of the coiled tubing, wherein propelling includes spraying an insulative coating on an interior surface of the coiled tube, the coating, when applied to the interior surface of the coiled tube and cured, including at least 50 percent Hydro-NM-Oxide.