27 results about "Coring" patented technology

This invention discloses a core retrieval or recovery tool for drilling, relating to the field of drilling engineering technology. The internal drill string assembly is suspended within the central channel of the external drill string assembly via a centralizer. The lower end of the internal assembly is a retaining spring assembly, and the lower end of the external assembly comprises the drill bit and multiple sliding blocks. One end of each sliding block extends into one end of the drill bit and is suspended by an elastic element. One end of the retaining spring assembly passes through the drill bit and extends between the sliding blocks, with the outer wall of the retaining spring assembly engaging with the inner wall of each sliding block via a bevel. Drilling fluid is introduced into the internal drill string assembly, causing it to move downwards relative to the external assembly. The downward movement of the retaining spring assembly pushes the sliding blocks outwards away from the drill bit's centerline. When the internal drill string assembly resets, the elastic element drives the sliding blocks back towards the drill bit's centerline. This invention improves drill string throughput and prevents the loss of incomplete or fragmented core samples at the drill bit, thereby increasing the core retrieval rate or core recovery rate.

The present application provides a kind of inner slag discharging device and its slag discharging method, it includes high wear-resistant obturator, drill bit drill rod device, venturi water and drill slag dry-wet separator, the drill bit drill rod device is located in high wear-resistant obturator, drill slag dry-wet separator is connected with drill bit drill rod device by venturi water.The flow direction of drill slag can be changed by changing the running direction of slag discharging medium, so as to reduce the scouring, soaking and friction of slag discharging medium and drill slag on the hole wall, which is beneficial to the formation of drilling hole;It can achieve the purpose of point coring by achieving "falling and discharging simultaneously";Drilling cuttings can be well collected, which is beneficial to the civilized production of construction site and prevents dirtiness and disorder;If inert gas is used for slag discharging during construction, it can also achieve the purpose of inhibiting spontaneous combustion of coal seam.Through the above technical scheme analysis, the device is theoretically feasible and the operation is reliable, which provides good drilling quality for casing, greatly improves the success rate of drilling and casing and the extraction effect.

This invention relates to the field of core drilling technology in the oil and gas industry, and discloses a continuous coring apparatus. The continuous coring apparatus includes an outer cylinder with connectors and a coring drill bit connected to its upper and lower ends, respectively. The outer cylinder contains a linear motion mechanism and multiple nested inner coring cylinders. The lower end of the outermost inner coring cylinder extends into the coring drill bit. Between adjacent inner coring cylinders, the linear motion mechanism drives the inner inner coring cylinder to move axially along the outer inner coring cylinder. This invention enables continuous coring with a single-cylinder coring operation footage of 20-30 meters or more, improving efficiency by at least 2-3 times compared to existing processes, significantly saving drilling costs and increasing coring efficiency.

This invention discloses a downhole self-dropped ball coring device, tool string, and related methods. The self-dropped ball coring device includes: a self-dropping mechanism and a coring tool; the self-dropping mechanism is located at the upper end of the coring tool and is fixedly connected to it; the self-dropping mechanism includes a sleeve assembly and a steel ball chuck; the sleeve assembly includes an inner cylinder section and an outer cylinder section sleeved around the inner cylinder section; the steel ball chuck is located inside the outer cylinder section and below the inner cylinder section; the steel ball chuck is used to hold steel balls; the inner cylinder section, after the coring device is lowered to a preset position, is pushed downwards relative to the outer cylinder section by the drill string connected to the inner cylinder section, enters the steel ball chuck, opens the steel ball chuck, and drops the steel balls. This invention solves the problem of not being able to drop balls from the wellhead in deep and ultra-deep well coring operations due to the presence of check valves, by using a self-dropping function to avoid drilling fluid directly scouring the core and affecting the coring quality.

This invention belongs to the field of coring tool technology, specifically, it relates to a coring drill bit. The coring drill bit includes: a body with a coring channel coaxially disposed within the body; circumferentially spaced cutting wings disposed on the body; circumferentially spaced straightening blocks disposed on the outer surface of the body, the straightening blocks being connected to the cutting wings; and circumferentially spaced flow channels disposed on the body, the flow channels being located between adjacent cutting wings; each cutting wing includes a tooth-spreading surface and a front surface, a leading edge being formed between the tooth-spreading surface and the front surface by a chamfer, and a plurality of cutting teeth being disposed on the leading edge, the cutting teeth not all being of the same size, at least one of the cutting teeth having a size greater than 13 mm.

The environmentally friendly coring drill bit drilling device according to the present application comprises a base member fixed to a structure to be drilled, a bracket vertically coupled to the base member and formed with a rack on one side thereof, a lifting carriage having a pinion gear engaged with the rack and installed on the bracket so as to be able to move up and down, a fixed plate coupled to one side of the lifting carriage and rotatably supporting a driving shaft of a motor, a driven shaft rotatably installed on the fixed plate and rotated by the driving shaft of the motor, a coring drill bit coupled to the driven shaft, and a metal rod passing through the driven shaft and the coring drill bit and coupled to an object to be cut.

The application discloses a kind of tunnel flexible net lining structure's positioning drilling coring test device and method, including support, mould forming device, lifting drive device, longitudinal positioning device, transverse positioning device and drilling device;Mould forming device includes bottom plate and the side plate being set to bottom plate around, longitudinal positioning device is connected below support by lifting drive device, longitudinal positioning device includes two mutually parallel longitudinal sliding grooves, transverse positioning device includes transverse sliding plate, transverse sliding plate both ends are slidably arranged in two longitudinal sliding grooves, transverse screw rod is screw-connected on transverse sliding plate, and loading platform is slidably arranged on transverse sliding plate, and loading platform is screw-connected with transverse screw rod, drilling device includes drill bit, driving motor, sight distance camera and annular direct light.The application can obtain the sample of different flexible net drilling position in flexible net lining structure, solves the technical problem that individualized sampling cannot be carried out according to the internal net material distribution of test piece.

The present application relates to the technical field of tunnel boring equipment, and discloses a rotary multi-point coring tunnel boring device, which comprises a shield body, a boring execution mechanism rotatably supported at the front end of the shield body through a rotary shaft, the boring execution mechanism comprising a truss and a plurality of coring drills distributed along the periphery of the truss, the truss being provided with a hollow sector, and a rotary support mechanism comprising a first support unit and a second driving unit arranged along the axial direction of the rotary shaft, both ends of the rotary shaft being supported by the first support unit and the second driving unit respectively, the second driving unit being used for driving the rotary shaft and the boring execution mechanism to rotate, so that the plurality of coring drills cover the entire tunnel excavation section during the rotation. Thus, the problems of large and heavy size, difficult operation and poor economy of the TBM in the prior art are overcome, and the tunnel boring quality and efficiency are ensured, and the safety and reliability during the operation are ensured.

The utility model discloses a kind of drilling device and its loose broken formation with negative pressure coring tool, it is related to oil and gas exploration, geological exploration technical field, loose broken formation with negative pressure coring tool includes: upper joint;Suspension shaft;Flow distribution element, it is sleeved in the lower end outside of suspension shaft, and flow distribution element is sleeved on nozzle, to form rear mixing chamber and front mixing chamber respectively, the lower end outside of flow distribution element is equipped with overflow groove, flow distribution element inside is equipped with axial hole and overflow hole, axial hole is communicated with rear mixing chamber by radial hole, overflow hole is communicated front mixing chamber and overflow groove;Upper outer tube;Inner tube;Lower outer tube;Coring bit;Core claw base, its inside is equipped with core claw, and core claw base is arranged on the inner side of coring bit upper end, and drill inner cavity is equipped between the two. The device can be aimed at broken formation and carry out coring operation, and can ensure that core enters core smoothly, avoid the phenomenon of plugging and grinding, improve core harvest rate.

The utility model discloses a large aperture segmented type coring device relates to drilling equipment technical field. Including segmented type coring outer tube, stable guiding mechanism, coring drill bit, rock core grabbing system and quick replacement interface. Stable guiding mechanism coaxial setting is in the coring outer tube inside and extends outward, for inserting the coring hole section realization centring guiding, coring drill bit is located at the outer tube front end, is used for annular reaming coring, rock core grabbing system includes barb and snap spring, can effectively prevent rock core and fall off, and quick replacement interface realizes the efficient connection with the drill rod. The device structure is compact, and the guidance is accurate, and the coring completeness is high, is applicable to the petroleum, geology, mine etc. in the complex stratum carries out the segmented reaming coring operation of large aperture, big depth, significantly promotes construction efficiency and security.

The present application relates to the technical field of core coring tool, and is a composite coring centralizer device, which comprises a body, outer cylinder centralizing bodies, outer cylinder centralizing blocks, inner cylinder centralizing bodies, inner cylinder centralizing blocks and a fixing device, the body is a through cylinder, a plurality of outer cylinder centralizing bodies are uniformly distributed on the outer side of the upper part of the body along the circumference, the middle part of the outer cylinder centralizing body is provided with an installation groove with an opening outward, the outer cylinder centralizing block is fixedly installed in the installation groove, and the inner side of the body corresponding to the upper end position of the outer cylinder centralizing block is provided with an installation ring table. The present application has the advantages of reasonable and compact structure, convenient use, outer cylinder centralizing bodies and outer cylinder centralizing blocks arranged on the outer side of the body for centralizing the outer cylinder, inner cylinder centralizing bodies and inner cylinder centralizing blocks arranged on the inner side of the body for centralizing the inner cylinder, so that the inner cylinder and the outer cylinder can be centralized by one tool, the number of components is reduced, the cost is saved, the installation and dismounting efficiency is improved, and the device has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

The utility model discloses a kind of drill rig coring pipe outer wall cleaning kits, it is related to drill rig coring pipe cleaning technical field, including supporting assembly, cleaning assembly, fixed assembly;Supporting assembly includes multiple sets of supporting piece mutually hinged, clamping portion;Cleaning assembly includes with multiple sets of clamping piece, multiple sets of flexible cleaning piece, elastic fixing piece, elastic cleaning piece;Fixed assembly includes fixing piece, locking piece;Through the supporting piece and flexible cleaning piece of setting, through increasing or reducing supporting piece, it can be quickly adapted to the coring pipe of any pipe diameter in 2-5m range, without replacing whole set of mechanism, can be quickly completed installation or disassembly, elastic fixing piece and elastic cleaning piece wear resistance and aging resistance, whole life of promotion body, elastic cleaning piece scraping realizes 360 ° dead corner soil, improve pipe cleaning efficiency, and the soil of peeling automatically downward discharge, avoid secondary attachment, and mast slide seat outer hanging plate of drill rig is directly bolted with it can be synchronous lifting with power head, both reduce drill rig load and simplify maintenance management.

The application provides a coalfield geological drilling coring device, which comprises a bottom plate, a through hole arranged in the middle of the bottom plate, a portal frame arranged above the through hole, a base plate arranged on the portal frame and capable of being lifted, a drilling mechanism comprising a driving motor fixedly arranged on the base plate and a driving head connected with the driving motor, a clamping mechanism comprising a base fixedly arranged on the bottom plate and a first clamping assembly and a second clamping assembly arranged on the base in a vertical direction, the first clamping assembly being arranged above the second clamping assembly and being in liftable connection with the base. The clamping mechanism arranged on the bottom plate can clamp and fix the drill pipe through the second clamping assembly when the drilling mechanism is separated from the drill pipe, and can clamp and position the newly installed drill pipe through the first clamping assembly. The clamped and positioned drill pipe does not need manual operation, and only needs to be pressed and rotated by the drilling mechanism to make the two ends of the drill pipe respectively threadedly connected with the driving head and the drill pipe arranged below.

This invention discloses a fixed-point pressure-maintaining coring device for deep directional long boreholes in coal mines. It mainly utilizes the sliding of a sliding column within the casing, and the top plate can dynamically adjust its radial position according to the actual diameter of the core. Even if the core has local irregularities, it can maintain uniform contact force, preventing the core from falling off or breaking during drilling. Furthermore, the rounded corners at the bottom of the top plate and the slightly larger diameter of the coring opening formed by the enclosure ensure that the core can smoothly enter the storage chamber, reducing entry resistance and mechanical damage, and protecting the integrity and original structure of the core, providing high-quality samples for subsequent geological analysis.

This application relates to the field of drilling coring technology, specifically to an in-situ measurement device and method for core length measurement based on cylinder wall sliding waves. The device includes a core cylinder assembly, a rotary follower excitation assembly, and a receiving assembly; the receiving assembly is equipped with at least two receiving transducers. The method includes: initial calibration of the propagation sound velocity and clock deviation; drilling and coring, with the core bit cutting the formation to allow the core to enter the inner cylinder and pushing the core marker to move axially and rotate synchronously. The core marker drives a cam to rotate, and the cam pushes a follower rod and a piezoelectric ceramic plate to periodically approach the inner wall of the inner cylinder. During this process, encoded acoustic signals carrying timestamps are emitted in real time and propagate along the cylinder wall. The receiving assembly receives and extracts the arrival time and timestamp of the first wave, calibrates the propagation sound velocity in real time, calculates the real-time distance, and converts it into the core length. This application utilizes the passive drive of the core marker's own rotation to achieve in-situ dynamic measurement of the core length in the wellbore.

The present application relates to a kind of coring drill bit devices, including punch assembly, stabilizing assembly and coring assembly, coring assembly is arranged in the inner tube formed by punch assembly, stabilizing assembly is arranged between the outer wall of coring assembly and the inner wall of punch assembly, its beneficial effect is that the wear amount of second position is larger when coring drill bit device performs punch action, and the wear amount of first position is almost negligible when performing core rock action, can be matched with the way of rope coring to take out coring assembly together with core from punch assembly and stabilizing assembly, so the wear state of second position can be measured each time coring is salvaged, and the replacement of second position is completed, compared with the replacement of stabilizing member by the way of whole lifting drill in conventional coring drill, replacement time is greatly shortened, and it is favorable to improve punch efficiency.

This invention relates to the field of coring technology and discloses a coring tool for loose formations, including an outer tube assembly and a spring-loaded retrieval nozzle, a positioning frame with equidistantly distributed ball bearings rotatably connected to the top of the positioning frame, an inner core tube, a connecting mechanism located at the end of the spring-loaded retrieval nozzle and used to connect the inner core tube, an inner concave cone with a minimum inner diameter consistent with the inner diameter of the inner core tube, and a rotary cutting mechanism located inside the inner concave cone. When the spring-loaded retrieval nozzle is lifted during coring, the rotary cutting mechanism can cut the core column through the connecting mechanism. This invention utilizes the rising of the spring-loaded retrieval nozzle to cause multiple rotary cutting blades to rotate and close. The rotation and closure of the multiple rotary cutting blades, which are pressed together end to end, not only cuts the core column but also forms an interlocking and overlapping base structure, ensuring that the core column remains intact during the cutting process and preventing the core column from falling off due to gravity during extraction, thereby improving the coring rate of loose formations.

This invention belongs to the field of rock core sampling technology, and specifically relates to a high-strength coring tool and method for deep shale fragmented strata. A high-strength coring tool for deep shale fragmented strata includes a support assembly, a drive unit fixedly connected to the side of the support assembly, a deceleration control assembly located below the drive unit, a coring assembly fixedly mounted on the drive unit, and a core fixing assembly inside the coring assembly. The support assembly drives the drive unit and the coring assembly to move vertically in a straight line. The deceleration control assembly automatically reduces speed when drilling due to excessive pressure. The core fixing assembly protects and fixes the core. This invention reduces the mechanical vibration and friction experienced by the core during drilling by using the coring assembly, thereby effectively reducing the risk of core breakage. The core fixing assembly effectively protects and fixes the core, solving the problem that the excessively high rotation speed of existing core sampling equipment can easily cause greater impact and breakage to the core.

This invention discloses a method for coring ultra-deep cutoff walls. First, a mud pump is activated to deliver special plant-based adhesive mud. A large-diameter double-tube drill bit equipped with a diamond drill bit is used to drill and extract the core at low pressure and slow rotation. After drilling to the predetermined depth, the mud pump is shut off, and a cable winch is used to lift the drill bit. A continuous steel borehole pipe of equal diameter is installed at the bottom. The drill bit is then replaced with a small-diameter double-tube drill bit equipped with a diamond drill bit, and the mud pump is activated again. A segmented drilling and coring cycle process is employed. During drilling and coring, borehole inclination is monitored based on a preset inclination measurement frequency. If deviation occurs, a new drill bit and an extended drill bit are used to repeatedly sweep the borehole at low pressure and slow rotation, inject cement grout, or use a deviation correction device for dynamic correction. By optimizing the drill bit combination and coring parameters, the core recovery rate is ensured to be no less than the preset value. This invention effectively solves the technical problems of easy deviation, low drilling efficiency, low core recovery rate, and poor integrity in ultra-deep cutoff wall drilling, providing reliable technical support for the quality assessment of ultra-deep cutoff walls.

This utility model discloses an automatic core sampling machine for rock core sampling, belonging to the field of rock core sampling technology. The utility model includes a base, a support column, a guide rail, a cooling assembly, and a bracket. Four movable wheels are installed on the top surface of the base. The support column is vertically mounted on one side of the base top. A guide rail is installed on one side of the support column, and a slider is slidably fitted on the guide rail. The guide rail slides and a driver is driven by the slider. A drill bit is installed at the bottom of the driver. A support rod is installed on the other side of the support column. Two brackets are installed, each vertically mounted at one end of the support column. Spring vibration isolators are installed at the bottom of the brackets. The cooling assembly includes a water tank installed on one side of the top surface of the base. Through the cooperation of the cooling assembly, bracket, spring vibration isolators, and support rod, the spring vibration isolators absorb vibration, reducing component loosening and wear, maintaining stable operation and accuracy of the equipment, and reducing noise. The cooling assembly cools the drill bit, preventing overheating and wear, extending drill bit life, improving cutting performance and operating efficiency, and flushing away rock cuttings to prevent accumulation.

The application relates to the technical field of steel preparation for tunneling machine cutters, and discloses a superfine-grain powder metallurgy preparation process for high-strength and high-toughness hard-rock coring drilling tools, which comprises the following steps: mixing pre-alloyed steel powder and nano carbon sources and pressing the mixture into a green body, placing the green body in a vacuum sintering furnace, driving gas phase exchange by utilizing pressure pulse fluctuation of a reducing mixed gas in a reduction stage to convert the nano carbon sources into anchored nano carbide particles in situ on the powder surface, and achieving densification by a pressure increment generated by instant high-pressure gas filling in a sintering stage. The application compensates for heat energy demand by utilizing pressure energy, suppresses matrix grain coarsening, enhances interface bonding energy by the pinning effect of the nano carbide, solves the contradiction between hardness and toughness, and ensures that the drilling tool has consistent chemical purity and structure uniformity in the whole cross section.

The present application relates to the technical field of drilling and coring in the field of oil and natural gas, and discloses a continuous coring device. The continuous coring device comprises an outer barrel, the upper end and lower end of which are respectively connected to a joint and a coring bit; a linear motion mechanism and multiple nested coring inner barrels are provided in the outer barrel; the lower end of the outermost coring inner barrel extends into and is mounted in the coring bit; and among two adjacent coring inner barrels, the linear motion mechanism can drive the inner coring inner barrel to move in the axial direction of the outer coring inner barrel. The present application has the advantages that continuous coring can be achieved, and a single-run coring operation can achieve a drilling footage of 20-30 meters or above, which improves the efficiency by at least 2-3 times compared with conventional processes, thereby greatly reducing drilling costs and improving the coring efficiency.

This invention pertains to the field of ultra-deep well coring in oil and gas drilling operations, specifically relating to a high-yield coring tool and method for pre-cutting cores. The tool includes an outer cylinder and an inner cylinder. From top to bottom, a resettable steel ball seat, a first spring, and a guide clamp are sequentially arranged within the inner cylinder. One end of the resettable steel ball seat is connected to one end of the first spring, and the other end of the first spring is connected to a step on the inner wall of the inner cylinder. Above the resettable steel ball seat, the inner cylinder has a through hole. Below the guide clamp, the inner cylinder is connected to a cutting structure. The inner wall of the outer cylinder is connected to the outer wall of the inner cylinder, and a flow channel is provided between the outer wall of the inner cylinder and the inner wall of the outer cylinder. The upper end of the flow channel communicates with the through hole, and the lower end of the flow channel communicates with the cutting structure. This invention, by incorporating a cutting structure, enables pre-cutting of the core during coring, which not only improves the integrity of the core but also shortens the operation time and reduces coring costs.