717results about "Core removal" patented technology

Methods and systems are disclosed. The methods may include determining a first sequence of permeabilities by subjecting a rock sample to a first sequence of confining stress, axial stress, pore pressure (CSASPP) triplets and determining a first rock parameter using the first sequence of permeabilities, the first sequence of CSASPP triplets, and a first permeability model. The methods may further include determining a second sequence of permeabilities by subjecting the rock sample to a second sequence of CSASPP triplets and determining a second rock parameter using the second sequence of permeabilities, the second sequence of CSASPP triplets, and the first permeability model. The method may still further include determining an in situ permeability for an in situ rock based on an initial permeability, a second stress sensitivity parameter, a first stress sensitivity parameter, a confining stress value, axial stress values, a pore pressure value, and a second permeability model.

The invention discloses a sand field coring method, which relates to the technical field of geological exploration, and comprises the following steps: S1, moving a drilling machine to a coring position and fixing, and adjusting the posture of the drilling machine according to the sand field terrain and coring requirements; s2, drilling tools are selected to be assembled according to the sand ground stratum characteristics, wherein the drilling tools comprise but are not limited to a hard rock trepanning drill bit, a drill rod and a sampling pipe; and S3, the hard rock trepanning drill bit is adopted to implement initial drilling, and a stable orifice is formed by controlling the drilling speed and pressure. According to the sand field coring method, the stable hole opening is formed through the hard rock trepanning drill bit, the drilling parameters are dynamically adjusted, complex stratum conditions are effectively dealt with, the coring success rate is remarkably increased, the integrity and representativeness of samples are ensured, the drilling efficiency and the equipment utilization rate are optimized through the technological method, and the sand field coring efficiency is improved. And the Kalman filtering algorithm is adopted to carry out fusion processing on multi-sensor data, and the output of the hydraulic system is adjusted in real time, so that the drilling efficiency is improved.

A method may include performing, by a drilling system, a drilling operation to produce a wellbore in a geological region of interest. The method may further include determining time elapse data describing an amount of time between the drilling operation and a hydraulic stimulation operation. The method may further include determining borehole stress data based on the wellbore, reservoir data, and geological data. The method may further include determining thermal diffusivity data regarding a temperature front in the geological region of interest based on the time elapse data, the reservoir data, and the geological data. The method may further include determining a wellbore breakdown pressure of the geological region of interest based on the thermal diffusivity data, the geological data, the borehole stress data, and the reservoir data. The method may further include transmitting a command to a stimulation control system based on the wellbore breakdown pressure.

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.

The invention provides a rotary impact type ultrasonic sampling device for deep rocks, which relates to the technical field of drilling and coring and comprises an anchoring unit, a feeding unit, a rotary unit, an impact unit and a coring unit which are sequentially connected from top to bottom. The device has the beneficial effects that the sampling device is firstly placed in a rock hole, and each anchoring tooth is fixed in the rock hole; then an ultrasonic transducer of the impacting unit and a motor of the rotating unit drive a drilling barrel to rotationally impact the rock, an electromagnet of the feeding unit drives a hydraulic cylinder to push the drilling barrel to drill downwards, the rock core enters the drilling barrel, and after the rock core in the drilling barrel reaches the needed length, the rock core pushes a push plate to move upwards to drive the lower end of a limiting rod to release a sliding block; the sliding block drives the core cutting rope to contract inwards to be in attached contact with a rock core, the core cutting rope cuts off the lower end of the rock core along with rotation of the drilling barrel, and therefore automatic drilling and coring can be achieved, coring operation is completed, the integrity of a rock core sample is guaranteed, and the core cutting device is particularly suitable for coring of deep hard rock.

The utility model discloses a broken soft coal bed pneumatic airtight coring device which comprises a coring outer cylinder, a coring drill bit and an adapter. A pressing ball seat is arranged in the adapter, a locking mechanism core pipe is arranged in the lower end of the pressing ball seat in a sleeved mode, and the locking mechanism core pipe is further sleeved with a force storage mechanism body pipe capable of moving in the axial direction. The lower end of the power storage mechanism main body pipe is connected with the coring inner cylinder through a power storage mechanism main body pipe extension section capable of axially moving; a limiting step is arranged on the outer wall of the force storage mechanism body pipe, a locking sliding sleeve is further arranged outside the force storage mechanism body pipe in a sleeving mode, and a force storage spring is further arranged between the limiting step and the locking sliding sleeve in an abutting mode. A locking ball is embedded in the pipe wall of the lower end of the force storage mechanism body pipe and can axially limit the locking sliding sleeve. A sealing ball valve is arranged in the coring inner cylinder, and the pushing cylinder can be pushed by the locking sliding sleeve to move in the axial direction to close the sealing ball valve. The closed coring device solves the problems of hole spraying, hole collapse and the like when an existing closed coring device is used in a broken soft coal seam.

The invention discloses an in-situ coring system and method for a soft rock extension roadway bottom plate. The system comprises a stable anchoring base, a drilling driving and propelling module, a stress adjusting module, a low-disturbance coring module, a rock core in-situ packaging and fidelity module and an intelligent integrated control unit. The stable anchoring base is used for fixing the system on a roadway bottom plate; the drilling driving and propelling module provides rotating power and axial feeding force for the drilling tool; the stress adjusting module is used for adjusting the stress state around the rock core; the low-disturbance coring module comprises a composite function coring drill bit and a double-layer coring pipe, and low-disturbance cutting and containing of a rock core are achieved. The rock core in-situ packaging and fidelity module is used for sealing and packaging the rock core in real time; and the intelligent integrated control unit adaptively controls the coring process according to sensor data. According to the invention, low-disturbance, high-precision and in-situ fidelity rock core acquisition of the soft rock roadway bottom plate can be realized, and the problems of large soft rock coring disturbance, difficulty in fidelity, low intelligent degree and the like are effectively solved.

The utility model relates to the technical field of well drilling coring, and discloses an elastic self-driven pressure maintaining coring tool which comprises a shell, a coring drill bit is fixedly arranged at the front end of the shell, an inner barrel and a coring assembly are sequentially and coaxially arranged in the shell, the rear end of the inner barrel is closed and fixedly connected with the shell, and a pressure maintaining device is arranged at the front end of the inner barrel. The coring assembly comprises a main spring, a positioning cylinder, a coring cylinder, a footage rod and a locking device, the main spring is used for providing pulling force towards the rear end of the inner cylinder for the positioning cylinder, one end of the coring cylinder is rotatably connected with the front end of the positioning cylinder, and the locking device is used for limiting the positioning cylinder to move towards the rear end of the inner cylinder; the footage rod penetrates through the front end of the positioning cylinder and is in sliding connection with the positioning cylinder, the footage rod is matched with the locking device, and when the footage rod slides towards the rear end of the positioning cylinder, limiting of the locking device to the position between the positioning cylinder and the inner cylinder can be relieved; according to the tool, the coring barrel can automatically return to the inner barrel when the footage is in place, and pressure-maintaining and fidelity coring of a deep rock stratum can be achieved.

A rapid assembly and automatic sampling drilling tool for frozen soil layer exploration includes a fixed flow divider, a flow guide pipe, a coring pipe and a drill bit. The fixed flow divider is connected to the drill bit through the flow guide pipe and the coring pipe mounted between the fixed flow divider and the drill bit. Two ends of the flow guide pipe communicate with the fixed flow divider and a main flow channel in the drill bit respectively. Hot water in the fixed flow divider can be conveyed into the drill bit through the flow guide pipe and sprayed from a nozzle arranged on the drill bit for drilling and coring operations. An inlet of the coring pipe communicates with a coring channel in an inner cavity in the drill bit, and a core sample drilled by the drill bit is taken out through the coring pipe.

The invention relates to a thermochemical energy-storage heat-preservation coring device and method for oil and gas coring, magnesium sulfate heptahydrate is preset in an interlayer of a heat-preservation cylinder of the coring device, the underground temperature is stored by utilizing dehydration and heat absorption of the magnesium sulfate heptahydrate, and then the stored heat energy is released by utilizing water absorption and heat release of the magnesium sulfate to carry out core heat preservation. The thermochemical energy storage thermal insulation structure comprises a thermal insulation cylinder and a thermal insulation trigger device, wherein a thermochemical energy storage material and reactant water are placed in an interlayer in the thermal insulation cylinder; the heat preservation trigger device comprises a trigger probe, a self-trigger and a trigger spring. The underground temperature is stored through dehydration and heat absorption of the magnesium sulfate heptahydrate, the stored heat energy is released through water absorption and heat release of the magnesium sulfate for rock core heat preservation, and extra energy supply is not needed; meanwhile, the magnesium sulfate heptahydrate is non-toxic and stable in property, can store different heat in different temperature stages, and is suitable for heat preservation coring of different reservoir depths.

The utility model discloses a geological drilling coring device which comprises a frame body, a placing table is installed on the upper portion of the frame body in a sliding mode, a motor is connected to the upper portion of the placing table through bolts, the motor is connected with a transmission shaft through a belt, a coring barrel is fixedly connected to the bottom of the transmission shaft, and a drill bit is fixedly connected to the bottom of the coring barrel. A cutting-off structure is arranged in the coring barrel and comprises a cavity and a first gear, a sliding block is slidably installed in the cavity, a rack is fixedly installed on the upper portion of the sliding block, a second gear is rotatably installed in the cavity, the second gear is connected with the rack in a meshed mode, and a double-face gear ring is rotatably installed at the upper position in the cavity. The double-face gear ring is connected with the second gear in a meshed mode, the double-face gear ring is connected with the first gear in a meshed mode, and a rotating shaft is fixedly installed at the top of the first gear. According to the geological drilling coring device disclosed by the utility model, a required core sample can be completely stored in the device.

The invention provides a tool applied to the field of petroleum drilling, and particularly relates to an electric control intelligent coring drill bit which comprises a power module and a cutting module, a limiting switch is arranged in the cutting module, the drill bit normally drills, a rock core passes through the interior of the drill bit and enters a coring barrel, and when the top of the rock core in the coring barrel triggers the limiting switch, the limiting switch is switched on. The MCU receives a coring completion signal, the electromagnetic valve is controlled to be opened through the MCU, high-pressure drilling fluid enters a turbine cavity through a mandrel hole, under the action of the high-pressure drilling fluid, the turbine rotates to generate motion and power, the motion and the power are transmitted to the rotating ring through the rotating disc and the rotating sleeve, the rotating ring rotates to push the connecting rod, the connecting rod pushes the evenly-distributed cutting knives, and therefore coring is completed. And the uniformly distributed cutting knives and the coring cylinder form a sealing cavity, the cut rock core is placed in the sealing cavity, and the cut rock core is taken out after pulling out of the drill. The intelligent degree of the drilling coring bit can be effectively improved, and the drilling coring efficiency and success rate are effectively improved.

The application discloses a sampling device for geological exploration, which comprises a geological sampling mechanism and a scale expansion mechanism. The geological sampling mechanism comprises a bottom plate, and a gas cylinder is fixedly connected to the top of the bottom plate. The application relates to the technical field of exploration sampling. The sampling device for geological exploration is combined with the geological sampling mechanism and the scale expansion mechanism. The two mechanisms are arranged so that when the sampling cylinder is lowered for sampling, the U-shaped supporting frame extends out of the side groove by the pressure of the core column. When the sampling cylinder drives the core column to rise, the U-shaped supporting frame supports the lifting supporting piece. The inclined pressing plate, the inner groove sliding frame and the tooth block are matched, so that the seal block can continuously and uniformly pass through the side groove and expand on both sides of the core column. Therefore, the scale line can be marked in advance when the core column is still in a whole in the sampling cylinder.

The invention discloses a riverbed along-river fault refined exploration method based on directional drilling group collaborative detection. The method comprises the following steps: S1, obtaining riverbed along-river fault data; s2, supplementing the collected data; s3, directional drilling holes are distributed and explored; s4, multi-parameter monitoring while drilling is carried out; s5, fault space positioning; s6, fault mud fine dating; the invention discloses a riverbed along-river fault fine investigation system based on directional drilling group collaborative detection. The system comprises a data acquisition module, a data supplement module, a directional drilling layout module, a while-drilling multi-parameter monitoring module, a fault space positioning module and a fault mud fine dating module, the method has remarkable advantages in three-dimensional space distribution capability; the permeability and rock deformation characteristics of a fault zone are quantified through parameter linkage analysis, dynamic data support is provided for fault activity evaluation, and reliable and efficient decision support is provided for geological disaster prevention and control and engineering planning through collaborative operation of directional drilling groups.

A system and method for determining a net source rock thickness is disclosed. The method includes obtaining at least one well log, a first and second plurality of core samples from a wellbore, and for each of the first plurality determining a relative abundance of inorganic materials, and for each of the second plurality a set of organic material data. The method further includes determining a validated total organic content and a measured source rock thickness based on the organic material data and relative abundance of inorganic materials and determining a data and a prediction portion of the wellbore, based on the second plurality sample locations. The method still further includes determining a cut-off value for each well log, predicting a source rock thickness from the cut-off values and the net source rock thickness from a sum of the predicted and the measured source rock thicknesses.

The application relates to the technical field of hydraulic engineering construction, in particular to a water conservancy engineering water intake tunnel construction device and method. The device comprises a support and further comprises a driving motor arranged on the lower side of the support, a water mill drill fixedly installed on the output shaft of the driving motor, and a driving mechanism arranged on the support, wherein the driving mechanism comprises a switching frame which is slidably sleeved on the support in the left-right direction. According to the application, after the water mill drill completes the punching work, the switching frame can move leftwards while the water mill drill moves rearward, thereby saving a large number of steps. According to the design of the clamping plates and the lever, when the front ends of the two clamping plates and the lever are inserted into the gap between the rock column and the hole wall, the rock column can be knocked off by knocking the lever, the rock column can be clamped by the two clamping plates, and the rock column can be taken out by moving the position of the whole device.

The invention relates to the field of geotechnical engineering equipment, and discloses a geotechnical engineering investigation rock sample collecting device which comprises two bases, the top ends of the bases are fixedly installed on the two sides of the bottom end of a supporting plate correspondingly, and vertical rods are fixedly installed on the two sides of the top end of the supporting plate correspondingly; a threaded rod is movably mounted in the middle of the bottom end of the transverse frame, the bottom end of the threaded rod is movably mounted in the middle of the top end of the supporting plate, the outer diameter of the threaded rod is in threaded connection to the middle of the rear end of the box body, an outer cylinder is movably mounted at the inner bottom of the box body, a middle cylinder is movably mounted in the inner middle of the box body, and the bottom end of the middle cylinder penetrates through the outer cylinder and extends to the position below the outer cylinder; and an inner cylinder is mounted in the middle cylinder through a positioning bearing. Core completeness is guaranteed through fracture prevention and buffer clamping design, pollution is reduced through an efficient cooling chip removal system, reliable operation of equipment is achieved in combination with overload protection and a stable structure, and sampling efficiency and sample quality are remarkably improved.

The invention relates to the technical field of ultra-deep geological exploration engineering, and discloses an ultra-deep horizontal hole full-hole coring and trajectory cooperative control system, which integrates a high-precision sensor and professional monitoring equipment through a geological data acquisition module to construct a multi-dimensional data monitoring system; the geological data transmission module adopts a dual backup scheme of drill rod built-in optical fiber and mud pulse transmission, is connected with the geological data acquisition module and the geological data analysis module through an industrial Ethernet, is carried with a 5G industrial module, and supports remote data access and instruction interaction of each functional module; the geological data analysis module comprises a processing unit and an analysis unit, the processing unit preprocesses the acquired data, and the analysis unit extracts the preprocessed data to calculate a trajectory deviation value and a rock core recovery rate; and the decision feedback module sends out feedback processing according to the calculation results of the trajectory deviation value and the core recovery rate. The system solves the problem of insufficient accuracy of traditional track evaluation.

The invention discloses an advanced geological forecasting method for TBM tunneling under a complex stratum, and aims to solve the technical problems that the single forecasting length of traditional advanced drilling is short, the construction period is long, and the long-distance forecasting requirement of the complex stratum is difficult to meet. The advanced geology forecasting method for TBM tunneling under the complex stratum comprises the steps that ultra-long-distance directional drilling coring operation is carried out in the advanced supporting period of a tunnel, and under the condition that the linear construction period is not occupied, first-time composite drilling, second-time directional drilling and third-time coring drilling are carried out in a lateral lug hole through a drilling machine; and high-precision directional drilling and advanced geological forecast under complex geological conditions are realized. First-time composite drilling, second-time directional drilling and third-time coring drilling are carried out in a sectional mode through the guiding drilling tool and the coring drilling tool, directional ultra-long-distance drilling and coring of a complex stratum are achieved, the geological condition is accurately forecasted while the construction period is prolonged, and guarantee is provided for tunneling construction of a TBM.

The invention discloses a sampling device for geological exploration, the sampling device comprises a geological sampling mechanism and a scale rubbing mechanism, the geological sampling mechanism comprises a bottom plate, the top of the bottom plate is fixedly connected with an air cylinder, and the invention relates to the technical field of exploration sampling. According to the sampling device for geological exploration, the geological sampling mechanism and the scale rubbing mechanism are used in a combined mode, by means of the arrangement of the two mechanisms, when a sampling barrel descends for sampling, a U-shaped supporting frame can extend out of a side edge groove through the pressure of a rock core column, and when the sampling barrel drives the rock core column to ascend, the U-shaped supporting frame is used for bearing a lifting supporting piece, so that the sampling barrel is convenient to use, and the sampling efficiency is improved. Through cooperation of an inclined pressing plate, an inner groove sliding frame and a tooth block, a seal block can continuously and uniformly penetrate through a side edge groove to rub the two sides of the rock core column, and therefore scale marks are marked in advance when the rock core column is still in a whole in the sampling barrel.

The invention discloses a natural gas hydrate corer soaking device based on a gravity assisted heat pipe network, and relates to the technical field of natural gas hydrate in-situ sampling, and the natural gas hydrate corer soaking device comprises a rock core inner pipe used for storing rock cores in the natural gas hydrate sampling process; the soaking pipe is arranged on the outer surface of the rock core inner pipe in a sleeving mode and used for uniformizing temperature distribution of the rock core inner pipe in the axial direction. The pressure-resistant pipe sleeves the outer surface of the soaking pipe and is used for bearing in-situ hydrostatic pressure; and the thermal insulation layer is coated on the outer surface of the compression-resistant pipe. Heat exchange between the coring device and the external environment is reduced through the heat preservation layer, axial temperature homogenization of the rock core inner pipe is achieved through the soaking pipe, the temperatures of all positions of the rock core in the rock core inner pipe tend to be consistent, natural gas hydrate is prevented from being locally heated, subjected to phase change decomposition and migrated to other positions, and the coring effect is improved. Original information such as rock core in-situ saturation, porosity, permeability, rock core structural strength and the like is effectively maintained, and the rock core in-situ microstructure and components are protected.

The geological prospecting drilling sampling device based on the high-pressure water jet comprises a frame, a box body is arranged on the frame, wheels are arranged at the bottom of the frame, a hand pushing frame is fixedly arranged on the upper portion of the rear side of the frame, a box door is arranged on the left side of the box body, and a solar cell panel is arranged on the top of the box body. A jet cutting high-pressure water pump, a switching high-pressure water pump, a handheld sampler, a water tank, a storage battery and a solar charging and discharging controller are arranged in the box body. The device is scientific in principle and easy to operate, the trolley is adopted as a bearing body of the water tank, the storage battery, the jet cutting high-pressure water pump and the switching high-pressure water pump, an energy source is provided for the handheld sampler, the handheld sampler can conduct long-distance sampling operation, core drilling sampling is mainly conducted on hard geological materials, the application range is wide, and the sampling efficiency is high. And a complete cylindrical sample is provided for geological exploration operation.

The invention relates to the technical field of rock core sampling, in particular to a rock core sampling device for mineral geological exploration, which comprises a drilling machine body, a rock core extraction device is arranged on the drilling machine body, a plurality of sections of rotating pipes are arranged on the rock core extraction device, a drill bit is arranged at the bottom of the first section of rotating pipe, and a limiting assembly is arranged at the top of the drill bit. An inner pipe is arranged in the rotating pipe, a clamping head is fixedly arranged at the top of the inner pipe, a lifting hook device is detachably arranged at the top of the clamping head, a butt joint sleeve head is rotationally arranged at the bottom of the inner pipe, a plurality of cutting assemblies are circumferentially arranged in the butt joint sleeve head, a plurality of clamping assemblies are circumferentially arranged outside the butt joint sleeve head, and a plurality of centering assemblies are circumferentially arranged outside the inner pipe; a set of closed-loop efficient coring system is formed by integrating the three functional modules of automatic clamping removal, in-situ truncation and dynamic centering, the technical bottlenecks that a rock core is prone to being damaged and clamping removal is not smooth in a traditional device are overcome, and the automation degree of coring operation and the integrity of a sample are greatly improved.

The invention relates to the technical field of deep space detection equipment, in particular to an extraterrestrial celestial body rock coring drill and a coring and breaking method thereof. The coring drill comprises an attachment mechanism, a rotary impact sliding table mechanism and a coring and core breaking mechanism which are sequentially connected, the attachment mechanism is used for being anchored to the surface of celestial rock, and the rotary impact sliding table mechanism is used for providing drilling rotation, impact power and axial feeding motion; the coring and breaking mechanism comprises an outer drill bushing, an eccentric coring pipe assembly mounted in the outer drill bushing and a drill bit connected to the front end of the outer drill bushing; the eccentric coring pipe assembly comprises a coring pipe and a driving shaft for driving the coring pipe to rotate, and the coring pipe and the driving shaft are eccentrically arranged; the driving shaft can be controlled to synchronously rotate in the same direction with the outer drill bushing or independently rotate in the opposite direction relative to the static outer drill bushing. Active anchoring and multiple buffering are combined, the sample integrity, the operation success rate and the automation degree of extraterrestrial hard rock coring are remarkably improved, and lossless capture and mechanical reliable breaking of a rock core are achieved.

Provided is a core sample tray 10 comprising a tray body 12 defining a plurality of side-by-side rotund cross-sectional grooves 14 each for operatively receiving a core sample therein. The tray body 12 is bound by first and second pairs 16 and 18 of side walls. The first pair of side walls 16 is arranged substantially parallel with said grooves 14 and the second pair of side walls 18 is arranged substantially transverse against ends of said grooves 14. The core sample tray 10 generally defines saw blade slots 22 that are configured to allow a saw blade to pass therethrough in order to saw a plurality of core samples in-situ within the core sample tray 10.

The invention provides a pile foundation excavation method and equipment, and belongs to the technical field of foundation pit engineering, the pile foundation excavation equipment comprises an integrated multi-head drilling machine, the integrated multi-head drilling machine can be fixedly mounted at a center hole through a bottom expansion locking mechanism, a plurality of holes can be formed at a time when the integrated multi-head drilling machine works, and the integrated multi-head drilling machine resets and rotates by a certain angle after working once. The drilling work is repeated, then an annular groove is drilled after multiple times of work, a rock core in the annular groove is taken out through a coring tool, then the rock and the mountain in the central area can be separated and taken out through a coring barrel, and the slag removal work is completed; by means of the expansion locking mechanism arranged at the bottom of the drilling machine, the integrated multi-head drilling machine can be fixed to a center positioning hole, the situation that equipment deviates in the working process and influences the overall drilling effect is avoided, the multiple drilling machines are arranged together, drilling work of multiple holes can be conducted at the same time, automatic drilling is achieved, the working efficiency is higher, and the drilling efficiency is improved. Meanwhile, workers do not need to go down to operate, and safety and reliability are achieved.

A railway tunnel crustal stress test in-hole rock core orienting device is used for conveniently, quickly, efficiently and accurately obtaining the original space orientation of a rock core, ASR and other crustal stress tests based on the orienting rock core are carried out through the orienting rock core, and the size and the direction of tunnel original crustal stress are obtained. The rock core orienting device comprises an outer shell with the diameter consistent with that of the outer pipe of the coring pipe, the inner structure of the outer shell sequentially comprises an upper inner shell, a middle base and a lower annular cavity from top to bottom, and the upper end of the outer shell is connected with the drill rod through a threaded structure. An annular water inlet cavity is formed between the outer wall of the upper inner shell and the inner wall of the outer shell, and an electronic compass mounting bin is arranged in the upper inner shell; and two groups of water pressure rotary drilling marking mechanisms are mounted on the middle base in the radial direction at intervals.

The invention provides a rock coring device for geotechnical engineering investigation, and belongs to the field of geotechnical exploration equipment. The rock coring device for geotechnical engineering investigation comprises a drilling barrel, a cutting part and a sampling barrel. During drilling, the cutting part is at a working angle, the counter-acting force of the cutting edge pushes the cutting part to deflect inwards, and the sampling barrel locally limits the inward deflection of the cutting part, so that the cutting part is positioned at the working angle; after the sampling barrel is filled with samples and before sampling, the sampling barrel can axially move relative to the drilling barrel so as to relieve limiting of the cutting part, then the cutting part is pushed by counter-acting force to deflect inwards and cut the roots of the samples, the roots of the samples are weakened, when the coring device is lifted, the samples are easier to break from the roots, the samples are prevented from falling off, and the sampling efficiency is improved. And the continuity of the sample is ensured.

The invention discloses a movable deep-sea large-depth rock core sampling drilling machine, and relates to the technical field of rock core sampling, the movable deep-sea large-depth rock core sampling drilling machine comprises a main machine and a drilling unit assembled at the front end of the main machine, and the drilling unit is used for executing drilling operation; the multiple drill rod drilling tools are arranged on the main machine in a stacked mode, and a conveying unit used for conveying the drill rod drilling tools to the front end is arranged on the main machine; the drill rod processing arm is arranged on the drilling unit in a sliding manner; comprising an output motor. According to the movable deep-sea large-depth core sampling drilling machine, the drilling machine stretching arm is driven to stretch and contract in the horizontal direction so as to drive the drilling unit to incline forwards or swing backwards along the rotating shaft, so that the drilling unit is deflected to a proper angle and is nearly perpendicular to the drilling ground, and it is guaranteed that drilling force is stable; and the bearing-feeding action is completed through the arrangement of the drill rod processing arm, so that the replacement of the drill rod and the drill tool is simpler.