143results about How to "Save work time" patented technology

A method for casing job by using a top drive drilling unit is applied to the petrol cementing technique field, and is characterized in that a casing elevator is used for lifting a single casing which is buckled with a casing string oppositely; a top-driven casing device is driven to tightly clamp the single casing; the top drive drilling unit is driven to revolve, which allows the single casing to be connected with the casing string; an air slips of a drill stand is loosed, which allows a top-driven flying ring and the casing elevator to support the single casing and the casing string; the single casing and the casing string are lowered; the air slips of the drill stand is used for fixing the single casing; slurry is poured to the interior cavities of the single casing and the casing string through a chief axis hydrophthalmia of the top drive drilling unit and a central spindle hydrophthalmia of the top-driven casing device; and finally, all the casing strings are lowered to the well bottom. The method has the advantages of reducing working equipments, simplifying working process, being capable of revolving casing string and cycling slurry timely according to the actual needs, increasing the automatic degree of the casing job, and improving the production efficiency and safety.

The invention relates to the technical field of unmanned aerial vehicles and in particular relates to an operating route planning method for a plant protection unmanned aerial vehicle and the plant protection unmanned aerial vehicle. The planning method comprises the following steps: acquiring boundary information of an operating land, and acquiring a boundary line of the operating land accordingto the boundary information of the operating land; determining an operation starting side, and drawing multiple navigation path segments parallel to the operation starting side according to the boundary information of the operating land, wherein the distance between two adjacent navigation path segments is a sprinkling width; and determining the route planning direction according to the operationstarting side, and performing route planning based on the navigation path segments until all waypoints in the operating land are covered, wherein the intersections between the navigation path segmentsand the boundary line are the waypoints. According to the operating route planning method and the plant protection unmanned aerial vehicle, an appropriate operating route can be rapidly planned according to the preset navigation path segments, so that the accurate operating coverage rate is improved, the phenomena such as missing sprinkling and excessive sprinkling are effectively reduced, the operating efficiency is improved, and crop growth is facilitated.

The invention discloses an H-shaped steel turning device and belongs to the field of a frock machine tool of a machine. The H-shaped steel turning device comprises two same turning machines, wherein the turning machine comprises a base, a turning frame and a motor; the turning frame is an open-close type round turning frame comprising an upper frame body and a lower frame body connected through a pin shaft; racks are embedded along the arc peripheries of the upper frame body and the lower frame body respectively; an H-shaped steel frame position is formed between the upper frame body and the lower frame body; the periphery of the turning frame is arranged in an arc-shaped track of the base in a matched way; the motor is engaged with the racks on the periphery of the round turning frame through a small gear of an output shaft of the motor so as to drive the turning frame to rotate; the two ends of H-shaped steel are respectively mounted in the H-shaped steel frame positions of the two turning machines; and the two turning machines adopt synchronous motors and drive the two turning frames to synchronously rotate with the H-shaped steel. The H-shaped steel can be turned through the device without a travelling crane and large quantities of auxiliary labors, so that the turning efficiency is high, the labor force and the operation time are saved, the operation is safe and convenient, and the production efficiency of products is improved.

The invention discloses an open hole staged fracturing well completion pipe string provided with a controllable valve and a hydraulic control switching pipe string, which are suitable for well completion processes of horizontal wells and straight wells. The hydraulic control switching pipe string is tripped to open and close the open hole staged fracturing well completion pipe string provided with the controllable valve, so that multilayer-section fracturing well completion construction is realized, and development requirements of low-permeability oil reservoirs and unconventional oil and gas resources are met. The pipe string is sequentially connected with a drill stem running tool, a top suspension packer, a hydraulic control switching retention cylinder, a switchable control valve, an open hole fracturing packer connected with the control valve, a shaft isolating valve and a bottom circulating valve from top to bottom by using a bushing. The hydraulic control switching pipe string comprises a hydraulic control switching tool and a continuous oil pipe; and a set of hydraulic control switching tool is connected to the bottom of the continuous oil pipe. The switchable control valve has the internal drift diameter of the same size; sand fracturing well completion can be performed on a stratum by using the bushing; and thus, requirements of large-displacement and large-scale fracturing reconstruction are met, the crack length, the crack number and the flow guide capacity are increased, and the production capacity and the recovery ratio are effectively increased.

The invention discloses a controlled-valve placed well-cementing staged-fracturing well-completion string and a hydraulically-controlled switch string, which are suitable to be applied to a well-completion process for horizontal wells and vertical wells, and through tripping in the hydraulically-controlled switch string to start and close the controlled-valve placed well-cementing staged-fracturing well-completion string, multi-layer-and-section fracturing well-completion construction is realized, thereby meeting the needs of development on low-permeability oil reservoirs and unconventional oil / gas resources. The controlled-valve placed well-cementing staged-fracturing well-completion string, from top to bottom, is sequentially connected with a hydraulically-controlled switch tool detention cylinder, a switchable control valve and hydraulic casing centralizers connected with the two ends of the switchable control valve, a pressed settling valve and a bottom circulating valve by using a casing; and at least a set of switchable control valve and hydraulic casing centralizers connected with the two ends of the switchable control valve are equipped in the string. The hydraulically-controlled switch string comprises hydraulically-controlled switch tools and a continuous oil pipe, and a set of hydraulically-controlled switch tool is connected to the bottom of the continuous oil pipe. The switchable control valves are same in inner drift diameter (same in size), and can carry out well completion on stratums through the sand fracturing of the casing, thereby satisfying the needs of large-displacement and large-scale fracturing reformation.

The invention discloses a scanning weighing labeling machine and a use method thereof. The scanning weighing labeling machine is used for conducting scanning operation, weighing operation and labeling operation on an object and comprises a machine table. A weighing mechanism, a conveying device, a bar code scanning mechanism, a label discharging and labeling mechanism and a computer system are arranged on the machine table. The conveying device comprises a roller platform and two side power transmission belt mechanisms and is used for conveying the object to the weighing mechanism to execute the weighing operation. The bar code scanning mechanism comprises a scanning device. When the object is conveyed to the weighing mechanism, the scanning device conducts action to execute the scanning operation. The computer system is configured to receive weight data transmitted by the weighing mechanism and conducts detection according to the weight data to decide whether to drive the label discharging and labeling mechanism to conduct the labeling operation that a label is bonded to the object. The machine can reduce personal cost and saves packaging process and the operation time.

The invention relates to a staged fracturing well completion method using a hydraulic-controlled switch to open / close controllable valves, is used for staged fracturing well completion of sleeves in petroleum horizontal wells or vertical wells, and can meet the development demands of low-permeability reservoir and unconventional oil gas resources. The method comprises: arranging openable / closable control valves the number of which is corresponding to the layer stages required to be staged-fractured in a well in a fracturing well completion tubular pile, and installing the control valves in the well; connecting a set of hydraulic-controlled switch tool to the bottom by using a connecting oil pipe to obtain an operation tubular pile, and installing in the fracturing well completion tubular pile; and carrying out hydraulic control on the operation tubular pile, and opening / closing the selected openable / closable control valves in the fracturing well completion tubular pile by using the hydraulic-controlled switch so as to finish staged fracturing well completion construction of the sleeves in the well stage. The staged fracturing well completion method has the advantages that: controllable valves with maximum latus rectum can be used according to the specific condition of the well completion tubular pile; a set of hydraulic-controlled switch can realize opening / closing of multiple controllable valves; the fracturing stage number is not limited; sleeve sand fracturing well completion can be adopted in stratum; and the demands of large output and large-scale fracturing transformation can be met.

The invention relates to a method for integrally producing vacuum steel pack degassing and vacuum irrigation multiple steel ingots, for avoiding secondary oxidization, middle pack flameproof material, and steel water pollution. The invention at one time arranges steel water pack and steel ingot on a vacuum pot formed by upper and lower pots and a vacuum pot cover, wherein the multiple steel ingots are swinging arranged on a rotary ingot disc. And the invention first processes VD degassing method, irrigates and feeds when the sliding water opening is toward to the ingot mould, closes water opening and rotates ingot disc, irrigates towards to the next ingot mould till needed number are completed. The invention can directly irrigate degassed steel water into multiple steel ingots, without secondary oxidization and pollution.

The invention relates to a recyclable type hydraulic packer and belongs to the field of oil and gas well operation downhole tools. The packer comprises an inner center pipe, an outer center pipe, a releasing claw, a bushing, a balanced connector, an oil drainage sleeve, an upper piston, a lower piston and a slip. The inner center pipe is sleeved with the outer center pipe. The releasing claw is arranged on one side of the outer center pipe. The bushing is arranged on one side of the releasing claw. A shear ring is installed on one side of the bushing through the balanced connector and a guide ring. The recyclable type hydraulic packer can bear the two-way pressure from the upper portion and the lower portion of the packer; 52 MPa high pressure can be borne by a sealing mechanism; when the slip enters a well and is unblocked and taken out, the slip is pressed through a spring and only stretches out when the cone acting force is applied to the slip under the action of the hydraulic force, and thus the advanced setting risks of a conventional packer can be effectively avoided; the packer is designed by adopting an integrated inner center pipe and can be directly connected with an oil pipe, the number of transfer buckle parts is decreased, the structure can be made more compact, the drift diameter is increased, and meanwhile the buckle disengagement risk of transfer buckles is avoided, so that the cost is reduced.

The invention relates to an H-shaped steel overturning, welding and forming device. The H-shaped steel overturning, welding and forming device comprises a welding robot moving mechanism, a steel plateconveying mechanism, and a plurality of clamping and overturning mechanisms arranged in the length direction of the steel plate conveying mechanism, wherein a web jacking mechanism and a wing plate jacking mechanism are further arranged on the steel plate conveying mechanism. The H-shaped steel overturning, welding and forming device is simple in structure, ingenious in design and suitable for welding of H-shaped steel components of various types, and ensures the welding quality and the welding precision; spot welding is performed through an electric welding machine; and the assembling precision, machining efficiency and automation degree of the H-shaped steel are greatly improved; the H-shaped steel can be directly assembled through the H-shaped steel overturning, welding and forming device with no need for a traveling crane and a large amount of auxiliary manual work; and the the H-shaped steel overturning, welding and forming device has high assembling operation efficiency, saves labor force and operation time, is safe and convenient, and improves the production efficiency of products.

The invention discloses an early-strength low-hydration heat evolution cement paste system applicable to deepwater shallow cementation. The system is prepared from 100 parts of cement, 5-10 parts of phase-change heat absorption materials, 10-30 parts of a density reducing agent, 8-15 parts of suspension materials, 0.5-1 part of a drag reducer, 0.3-0.55 part of retarder, 0.7-1 part of a fluid loss agent, 0.7-1 part of a defoaming agent, 0.06-0.1 part of an early strength agent and 68.2-82.3 parts of water. The cement paste system has the good early strength property at low temperature, is small in hydration heat evolution amount and good in thickening property, flowing property and sedimentation stability, has right-angle thickening property and small water loss, and meets on-site construction requirements. According to the system, surface cementation in the deepwater hydrate layer can be achieved, operation time and cost can be saved, and a technical support is provided for mining of oil and gas resources in the deepwater hydrate layer.

The invention discloses a preparation method of a composite biological weak gel plugging agent. The method utilizes xanthan gum, sodium silicate, aluminum citrate, or trivalent organic Cr<3+> ions to form weak gel to block high permeability water-yielding stratum of oil reservoir. The plugging agent prepared by the method is applicable to plugging of high permeability zone in conventional oil wells, also applies to water injection wells profile and profile control and displacement; the water-yielding stratum does not need to be found, and the plugging agent can plug everywhere it goes, thus saving a lot of work time and costs. The weak gel can be degraded by sodium hypochlorite or hydrogen peroxide; if the wrong place is plugged, the weak gel can be degraded; therefore, the composite biological weak gel plugging agent is a solvable readable excellent plugging agent with high resistance to salinity.

The invention relates to an ocean platform submersible pump winding and unwinding method which comprises a hose winch (1), a combined hose (2), a submersible pump (3), a winch bracket (4), a winch barrel (5), a motor (6), a reduction gearbox (7), a control cabinet (8), a seawater output end (9), a hose guiding device (10), pump body guiding frames (11) and pile washing-out pipelines (12). The method is characterized in that the submersible pump (3) is connected to one end of the combined hose (2); the combined hose (2) is wound onto the winch barrel (5) on the hose winch (4); and the motor (6) and the reduction gearbox (7) are started by the control cabinet (8) to realize synchronous winding and unwinding of the submersible pump (8) and the combined hose (2). The method is simple, safe and reliable, is easy to operate, can meet the using requirement of a platform, has high adaptive capacity to environment, avoids being influenced by platform lifting, alleviates the operation intensity of submersible pump winding and unwinding, saves operation time and manpower and has high economic efficiency.

The invention discloses a bacteria stick bagging sealing device and method. The bacteria stick bagging sealing device comprises a bagging mechanism, a sealing mechanism and a control unit. The sealing mechanism comprises a second rack, a supporting base, clamps, a second arc-shaped plate, a tying structure and a second pushing rod, wherein the supporting base, the clamps, the second arc-shaped plate, the tying structure and the second pushing rod are arranged on the second rack. The second rack is arranged in the end, away from a feeding hopper, of a first rack. A first arc-shaped plate is arranged in front of a supporting plate. The second arc-shaped plate is located behind the supporting base. The multiple clamps are arranged above the supporting base. The tying structure is located between the clamps and the supporting base. The second pushing rod is located on one side of the supporting base. The control unit controls a driving mechanism and the tying structure to work. According to the bacteria stick bagging sealing device and method, the effect of automatically sending out bacteria sticks is achieved by arranging the second pushing rod.

The invention relates to the technical field of wind power, in particular to a hydraulic control device for offshore wind power piling. Offshore wind power piling efficiency is improved. The device comprises an oil tank, an oil supply motor pump set, an air cooling circulating pump and three oil cylinder sets. The oil supply motor pump set comprises an oil supply motor pump, an oil supply filter and an oil supply overflow valve. An oil pumping opening of the oil supply motor pump is connected to a system oil supply pipe through the oil supply filter and is connected to the oil tank through the oil supply overflow valve. The system oil supply pipe is connected with at least one energy storage device. Oil cylinders in a first oil cylinder set and a second oil cylinder set are respectively provided with a reversing valve. Oil cylinders of a third oil cylinder set are respectively provided with a servo valve. Working openings of the reversing valves and working openings of the servo valves are connected working cavities of the oil cylinders which the valves belong to. Oil returning openings of the reversing valves and oil returning openings of the servo valves are connected to the oil tank. Pressure oil openings of the oil cylinders are connected to the system oil supply pipe. The device is suitable for mounting of an offshore wind power plant.

A nonel wire feeding and wire storage device. The invention relates to a civil explosive device, in particular to a nonel wire feeding and storage device. The invention aims to solve the problems that the existing nonel tubes are prone to accumulation or temporary shortage in the production process, it is difficult to realize active traction and wire feeding, and at the same time, the length of the nonel tubes cannot be automatically cut to a fixed length. A detonating tube wire feeding and wire storage device includes a pulling wire feeding mechanism and a wire storage buffer mechanism, and the pulling wire feeding mechanism and the wire storage buffer mechanism are respectively installed on an operation platform. The invention is used for the production of nonel tubes.

The present invention relates to a hard film fixing device for a greenhouse, capable of quickly, conveniently, and tightly fixing a hard film or conveniently separating the film. According to the present invention, the hard film fixing device comprises: a loop frame (10) including a fixing groove part (14) formed on the upper surface with both open ends and an open upper part; a combination unit (20) including first and second combination members (21, 22) to insert a hard film into the fixing groove part; and a cover member (30) combined to widen left and right gaps of the first and second combination members in the upper direction to cover the upper middle part of the first and second combination members while fixing the first and second combination members so that the first and second combination members are able to tightly and firmly combine the hard film with the fixing groove part. As such, the present invention is capable of considerably reducing the time and costs for corresponding work.

The invention discloses an offshore foundation reconnaissance and detection integrated platform, and relates to the field of ocean engineering foundation reconnaissance. A cylindrical base stretches out of the sea surface through a transition section; the upper end of the cylindrical base is connected with a water platform; in-situ cross plate testing equipment, static cone penetration test equipment, full-flow penetration test equipment and drilling, sampling and reconnaissance operation equipment are mounted at the upper part of the water platform; a cylindrical partition is arranged inside the cylindrical base to form a reserved void compartment without a top plate; the top of the reserved void compartment without the top plate opens to the water platform; the number of negative pressure jet pumps and the number of negative pressure detection test modules are the same as the number of branch bins of the cylindrical base; four negative pressure jet pumps and four negative pressure detection test modules are arranged on the periphery of the top of the cylindrical base; inner air bags are arranged in the branch bins of the cylindrical base, and are used for adjusting and centralizing in the sinking process. The integrated offshore foundation reconnaissance and detection platform has the benefits that the platform and an offshore wind flashlight type basic mounting ship are coordinated to be used, no extra tug boat or other mounting equipment is needed, and the operation time and cost are greatly reduced.

The invention discloses a preparation method of a cross-linkable and curable casing damage plugging agent. The preparation method comprises the following steps: preparing an agent A, and then preparing an agent B, and finally, mixing the agent A with the agent B to form the plugging agent. The plugging agent prepared by the method provided by the invention is applicable to either blast hole plugging of a conventional oil-water well or casing damage well repair; the plugging agent is capable of plugging wherever the plugging agent goes; and therefore, lots of operating time and cost are saved.

The present invention relates to a coupling device for a deformed bar capable of firmly coupling ends of deformed bars. The coupling device for a deformed bar includes a cylindrical housing having a constant diameter and formed with a plurality of through-holes and fixing holes on the outer circumference thereof; a pair of arc-shaped pressing members inserted into the housing and having flanges at upper and lower portions and a plurality of fixing grooves on the outer surface; an arc-shaped elastic pad coupled to the inner surface of the pressing member; a pair of arc-shaped spacers inserted between the pressing members and having flanges at upper and lower portions and a protrusions protruding from the outer surface; and a fixing member fixed to the fixing hole by a screw, with an end coming into contact with the fixing groove. The deformed bars are inserted and fixed between the pressing members and the spacers from the top and the bottom.

The invention relates to a novel holder-type electrode shell structure and an installation butting process thereof, and belongs to the technical field of electrode shell manufacturing. A single-section electrode shell of the novel holder-type electrode shell structure comprises barrel bodies, inner rib plates, a guide spigot plate and outer rib plates, wherein the inner rib plates are equally welded to the inner walls of the barrel bodies; the outer rib plates are equally welded to the outer walls of the barrel bodies, and the upper barrel body and the lower barrel body are mutually butted through the guide spigot plate; during butting, the inner rib plates form one-to-one correspondence to the outer rib plates; reference lines, welded inside and outside the barrel bodies, of the inner ribplates and the outer rib plates are mutually parallel; the outer rib plates and the barrel bodies are welded in a staggered manner; and a low grinding amount for the outer rib plates during electrodeshell production and butting is achieved, so that the original evenness and smoothness of a material of a conductive part are guaranteed. The production procedures and the working time are saved, thequality of the electrode shell is improved, and the service life of a conductive component is prolonged; and during butting for the electrode shell, the requirement on the welding level of workers isgreatly lowered, and the welding quality can further be ensured.

The invention relates to a pipe joint assembly and a hot-water boiler system using the same to be combined or detachably attached in a one-touch mode, especially relates to the pipe joint assembly and the hot-water boiler system using the same through inserting of a held part of an exterior part into a hold part of an interior part and rotating, so as to combine or detach in one-touch mode, or greatly improving the convenience when the hot-water boiler and hot-water circulation pipes or hot-water cushions are needed to decomposed for moving the hot-water boiler or cleaning the hot-water circulation pipes, or when the boiler or the hot-water cushions are decomposed and reloaded. The invention provides the pipe joint assembly characterized by comprising: the interior part, including an integrated formed pipe connection part, the hold part connected to the connection part, a guide part formed in the hold part, and a stop part connected with the guide part; and the exterior part, including an integrated formed pipe connection part, the held part connected to the connection part, and a stopper arranged on the stop part through the guide part and on the peripheral surface of the hold part.

The invention provides an intelligent balanced downhole production control valve capable of realizing balanced layer mining in an oil well. The intelligent balanced downhole production control valve comprises a rechargeable power supply system, a data acquisition recording system, a CPU (central processing unit) centralized management system and a traffic control system. The above systems are arranged between a central pipe and an outer cylinder jacket and are connected through a connecting piece, and an upper joint and a lower joint are respectively arranged at two ends of the central pipe and are in serial connection with an oil pipe. The intelligent balanced downhole production control valve is used in a production string for layer mining, real-time monitoring, intelligent controlling and artificial controlling on production parameters of the oil well are completed between the production string and a controlling device through the two-way radio frequency identification technology, and balanced mining of oil deposit is realized.

The invention provides a one-step method for preparing grafted polyolefin wax. The one-step method comprises the following steps: grafting a graft comonomer onto a polyolefin wax main chain according to a solid phase graft technology to obtain comonomer grafted polyolefin wax; feeding a resolvent to the comonomer grafted polyolefin wax to resolve unreacted unsaturated polar monomers and dimethyl benzene, removing the resolvent, feeding an emulsifier, pyrosulfite, water and alkali, stirring for mixing, and ensuring the temperature to be any temperature or in any temperature range of 160 DEG C to 180 DEG C for heat-insulating reaction to obtain a grafted polyolefin wax emulsion. The method has the advantages that the consumption of harm resolvent dimethyl benzene, operation time and cost are greatly reduced; compared with those in a common grafted product, free maleic anhydride and dimethyl benzene in the grafted polyolefin wax prepared according to the method are removed more easily and completely.

The invention discloses a film mulching device for agricultural planting. The film mulching device for agricultural planting comprises a platform, and a film mulching roller and a winding wheel disc are rotationally installed on the lower end face of the platform; a driving motor is installed on the upper end face of the platform, a first transmission shaft is rotationally installed at the outputend of the driving motor, a first transmission belt is rotationally connected between the first transmission shaft and the film mulching roller, second transmission shafts meshed with the first transmission shaft through bevel gear sets are symmetrically and rotationally installed on the two sides of the upper end face of the platform, and swing mechanisms are symmetrically arranged on the two sides of the platform; and the swing mechanisms are rotationally connected with the second transmission shafts through second transmission belts, rotating rods are connected to the bottoms of the swing mechanisms, and buckets are fixed to the lower tail ends of the rotating rods. According to the film mulching device for agricultural planting, while the driving motor drives the film mulching roller to rotate for film mulching, the bevel gear are used for driving the swing mechanisms to synchronously operate, so that the buckets on the two sides are driven to periodically shovel soil blocks to theposition above a thin film, automatic soil mulching of the thin film is achieved, the operation time and labor are greatly saved, and the operation efficiency is improved.

The invention discloses a manufacturing method of a paraffin-control anti-scale anticorrosion alloy suction aid. The method includes: making steel J55 or N80 into the suction aid, making nitrates or sulfates or chlorides of silver, copper, zinc, tin, nickel, iron, manganese and rare-earth into an electroplating liquid I, preparing an electroplating liquid II by using sodium potassium tartrate as a complex, adjusting pH of the electroplating liquid II to 12-13.5 by using sodium hydroxide to obtain an electroplating liquid III, electroplating the suction aid in the electroplating liquid III by using metallic titanium or graphite as a positive electrode and the suction aid as a negative electrode, and performing thermal treatment at 300-600 DEG C to obtain the finished paraffin-control anti-scale anticorrosion alloy suction aid. The aid is capable of degrading paraffin, colloid and asphaltene in crude oil, preventing the precipitation and condensation of sulfates or carbonates of calcium, magnesium, barium and strontium, and preventing paraffin jamming and scale jamming on the wall of a suction pump, a sucker rod or a suction pipe.

The invention relates to the field of welding devices, and particularly discloses full-automatic copper tape welding equipment based on silver contacts. A tape is arranged on a tape device and is processed through a pre-punched positioning hole device, a first feed detection frame, an automatic point welding machine, a second feed detection frame, a tapping machine, a third feed detection frame and a discharge device sequentially. A welding body is arranged in the automatic point welding machine, the welding position is positioned at the lower end of the welding body, a welding power supply and five buttons are arranged in the automatic point welding machine, the buttons refer to a scram button, a power button, a start button, a stop button and a reset button sequentially, a silver wire is connected with the automatic point welding machine, and the tape is positioned below the welding position when passing the automatic point welding machine. The full-automatic copper tape welding equipment has the advantages that labor and operation time can be saved, uniformity in welding quality can be guaranteed, and the situation that operators are scalded due to high temperature generated by welding can be avoided effectively.

The invention relates to a mother-son drill bit spot sampling device comprising a coring pipe, and the coring pipe comprises an inner cylinder and an outer cylinder; the end portion of the coring pipe is provided with a mother drill bit, drill teeth are fixedly installed on the mother drill bit at an interval, a son drill bit is embedded into the mother drill bit, and the mother drill bit is connected with the son drill bit through a locking device; the locking device comprises a locking latch, a baffle plate and a draw bar, the locking latch is arranged in pin holes in the mother drill bit and the son drill bit in a penetrating manner, the baffle plate is connected with the draw bar through a pin, the exterior of the locking latch is sleeved by a latch spring, and the upper end of the draw bar is arranged in the bottom of the son drill bit in a penetrating manner. The mother-son drill bit spot coring device takes fast spot sampling required by coal seam gas extraction effect examination as the technical condition, the mother and son drill bits are locked and drill in a linked manner when sampling is not carried out, an unlocking device is started when a predetermined sampling position is reached, the mother drill bit takes samples in the manner of a sampling pipe, time is saved, positioning is accurate and sample mixing can be avoided, and the aim of fast spot sampling is achieved.

A method for casing job by using a top drive drilling unit is applied to the petrol cementing technique field, and is characterized in that a casing elevator is used for lifting a single casing which is buckled with a casing string oppositely; a top-driven casing device is driven to tightly clamp the single casing; the top drive drilling unit is driven to revolve, which allows the single casing to be connected with the casing string; an air slips of a drill stand is loosed, which allows a top-driven flying ring and the casing elevator to support the single casing and the casing string; the single casing and the casing string are lowered; the air slips of the drill stand is used for fixing the single casing; slurry is poured to the interior cavities of the single casing and the casing string through a chief axis hydrophthalmia of the top drive drilling unit and a central spindle hydrophthalmia of the top-driven casing device; and finally, all the casing strings are lowered to the well bottom. The method has the advantages of reducing working equipments, simplifying working process, being capable of revolving casing string and cycling slurry timely according to the actual needs, increasing the automatic degree of the casing job, and improving the production efficiency and safety.

The invention discloses a warehousing operation process management method based on an RFID reader-writer, and relates to the technical field of process management. Warehousing operation: reading warehouse tray information through an RFID reader-writer, obtaining cigarette carton information bound with a warehouse tray, obtaining corresponding warehousing operation information according to the cigarette carton information, obtaining a shelving task according to the warehousing operation information, obtaining a goods allocation RFID tag through the RFID reader-writer, and sending voice information to instruct a forklift to complete the warehousing operation. Warehouse-out operation: obtaining a warehouse-out task, reading a warehouse tray RFID tag through the RFID reader-writer, comparing the warehouse tray RFID tag with the warehouse-out task, if the warehouse tray RFID tag is matched with the warehouse-out task, reading the RFID tag of the goods allocation, and sending the voice information to instruct the forklift to complete warehouse-out operation.