157results about How to "Reduce the number of trips" patented technology

The invention relates to a drilling engineering design in the petroleum drilling engineering, in particular to wellbore trajectory optimized design and control in the highly-displacement well. For three-stage and four-stage catenary sections, the design of wellbore trajectory is finished through 12 steps. The invention puts forward a new method of two-dimensional catenary trajectory design. A plurality of units with different azimuth wander ratio is divided according to natural deviating rule of formation, which is combined to the formation condition that conforms to the actual situations of drilling engineering. On the basis of maintaining the characteristics and advantages of catenary trajectory and regarding to the influence of natural deviating rule of formation, a method of three-dimensional catenary trajectory design is put forward, which can not only scientifically work out the azimuth lead angle and initial azimuth, but also work out the trajectory parameters of every point inthe wellbore trajectory. The realization of three-dimensional wander trajectory design of catenary section has real meaning of guidance for the drilling design and construction of the highly-displacement well. The invention is used in the field of petroleum and geological exploration.

The invention belongs to the field of electronic commerce. Under the overall situation that the online shopping amount rises day by day while actual shops cannot attract such a large number of customers, the actual shops try to seek a method for attracting a great number of Internet users to browse own shops and buy commodities, leading to a remote shopping server and a use method. The remote shopping server works in shops in shopping malls or warehouses. A customer can connect to the remote shopping server through a mobile phone or a computer, browse commodities by moving the server in the shops or warehouses, and perform voice communication with shop assistants beside the server in video and voice ways. When the customer decides to purchase a certain commodity, the customer can buy directly online, thereby successfully realizing networking of the actual shops and laying a basis for selling of commodities in the actual shops to the Internet users. On the other hand, the remote shopping server is operated by the customer to move in a shopping mall, so that the customer can feel the atmosphere of the shopping mall, and busy women can go shopping easily.

The invention discloses an underground coal mine sleeve chambering and screen pipe lowering device and a construction method. The sleeve chambering and screen pipe lowering device comprises a sleeve, an open-closed chambering drill bit, a screen pipe and a suspending device, the sleeve is thin in wall and large in through hole diameter, an open-closed structure is arranged at the front end of the open-closed chambering drill bit, a chambering component is arranged at the outer edge of the middle of the open-closed chambering drill bit, the rear end of the open-closed chambering drill bit comprises a connecting structure, the screen pipe and the suspending device can pass the inside of the open-closed chambering drill bit, the front end of the screen pipe is connected with the suspending device, and the open-closed structure and the chambering component are provided with cutting elements to respectively realize front end drilling and chambering. The construction method includes: pilot hole construction, rotary chambering drilling and hole protecting. Therefore, chambering and screen pipe lowering processes are combined, and lowering of a large-diameter screen pipe into a long hole section for hole protection is realized, so that technical process is simplified, construction time is saved, reliability is high, success rate is high, utilization rate of a drilled hole is increased greatly, and gas extraction effect is improved.

The invention relates to a variable-diameter hydraulic cutter capable of realizing continuous cutting of sleevings with different diameters through gear and rack transmission in the abandoned well operation process. The technical scheme of the cutter is that an upper joint is connected with a housing by threads; a spraying nozzle is located in a piston push rod and connected with the push rod by the threads; an upper spring, a turning mechanism and a piston are mounted on the piston push rod sequentially and arranged inside the housing; cutter knives are arranged uniformly in the circumferential direction and connected with the housing by hinge pins, gear structures of the upper parts of the cutter knife bodies are meshed with a cylindrical rack, the rack and the gears can transmit, and too large displacement of the cutter knives is limited while the opening degrees of the cutter knives are accurately controlled. According to the variable-diameter hydraulic cutter, the piston and the turning mechanism are pushed by the throttling action, gear and rack transmission is matched so as to realize continuous cutting of the sleevings with different diameters, trip times are reduced, the abandoned well operation time is saved, and the sleeving cutting efficiency and the operation reliability in the abandoned well operation process are improved greatly.

The invention discloses a logistics delivery route optimizing generation method and system. The logistics delivery route optimizing generation method comprises the following steps: firstly, obtaining and combining client information in distribution areas to form distribution districts; then, selecting the district which takes the longest distribution working time from a logistics center as a calculation source point according to delivery car capacity; accumulating client delivery capacity according to client linear distribution serial numbers in the district or a next delivery district which takes the shortest working time from the source point until the delivery car capacity is satisfied; and finally, finishing a total delivery amount, and outputting the selected client linear distribution serial numbers as an optimal delivery route. A proper delivery path is calculated by adopting a reverse recursion Dijkstra algorithm, the district is used as a basic calculation unit, a distribution network is simplified, a network calculation amount is greatly lowered, information acquisition difficulties and information acquisition time are greatly lowered and shortened respectively, the amount and the dispatch frequency of the delivery cars are reduced, operation cost is lowered, and distribution efficiency is improved.

The invention discloses a high speed railway power supply network system comprising a traction substation, feed line breakers 1DL and 2DL, an AT station, feed line breakers 3DL and 4DL, an AT subarea station, feed line breakers 5DL and 6DL, an uplink traction network power supply arm and a downlink traction network power supply arm, a first protective relaying device, a second protective relaying device and a third protective relaying device; when detected 1DL and 2DL protection measured values are bigger than a setting value1, or the detected 1DL and 2DL protection measured values are defined between the setting value1 and a setting value2, and a control signal sent by the second or third protective relaying devices is received, the first protective relaying device can control the traction substation feed line breakers to make protection motions, thus breaking the traction substation power supply. The high speed railway power supply network system can solve the problems that a load current and a power supply arm end short circuit current cannot be effectively distinguished; the invention also discloses a high speed railway power supply network system protection method.

The invention relates to a high-frequency torsion-restoration axial vibration impacting tool for well drilling engineering of petroleum and natural gas. The tool is connected to the upper portion of a drill bit in a threaded mode and comprises a turbine assembly, a switching assembly and an impacting assembly. The front end of the switching assembly is connected with the impacting assembly, the rear end of the switching assembly is connected with the turbine assembly, and periodical change of a mud channel is achieved through the switching assembly; and a sliding sleeve is pushed to slide forwards through the differential pressure generated by flow channel change, axial displacement and acting force are generated to act on an impacting spline for driving the impacting spline and an impacting hammer to move forwards together, a torsional spring at the front end of the impacting hammer is compressed, an anvil is impacted by the impacting hammer, when the sliding groove moves backwards, the torsional spring exerts a rotating torque on the impacting hammer to enable the impacting hammer to rotate, and after the impacting hammer enters another spline groove, periodic movement is repeated. The high-frequency torsion-restoration axial vibration impacting tool is simple in structure, high in adaptability for the drill bit and the stratum and capable of improving well drilling efficiency.

The invention discloses a device and a method for drilling by using a full-automatic composite material continuous pipe and relates to the technical field of drilling in the oil and gas industry. The upper end of a drill is connected with an electric motor driving the drill to rotate, a composite material continuous pipe with an embedded cable is wound on a continuous pipe roller and provided with a mud flow channel, and the lower end of the composite material continuous pipe is connected with a continuous pipe connector. The continuous pipe connector, a measuring mechanism and a steering tool are connected with the electric motor sequentially. A ground power supply is connected with the measuring mechanism, the steering tool and the electric motor through the cable embedded in the composite material continuous pipe. The device and the method achieve transmission of electric power to the underground through the composite material continuous pipe, bi-direction real-time communication between the underground and the ground and drilling through the electric motor. The device and the method can be applied to the fields of underbalanced drilling, deepwater drilling, directional drilling, re-drilling of an old well and drilling of a well containing high sulfur content.

The invention discloses a liquid lubricant for a drilling fluid and a preparation method of the liquid lubricant. The liquid lubricant is prepared from the following raw materials by weight: 500 to 600 parts of methyl oleate, 170 to 230 parts of silicone oil, 170 to 230 parts of white oil, 30 to 80 parts of backlogged oil, 40 to 80 parts of an emulsifier, 40 to 80 parts of a surfactant, and 15 to 20 parts of a covering agent. The liquid lubricant can be used for a water-based drilling fluid, is approximately not changed in lubricity at 200 DEG C high temperature, can be used for reducing the pulling up force and the torque of a drill stem greatly, and is relatively high in resistance reducing lubricity.

The invention discloses a sprinkling device for newly built roads, which comprises a box body, a fixed base is fixedly connected to the left side of the bottom of the inner wall of the box, a motor is fixedly connected to the top of the fixed base, a worm is fixedly connected to one side of the output shaft of the motor, and the fixed base The side away from the motor is fixedly connected with a shaft seat, the center line of the shaft seat is connected with a transmission shaft in rotation, the middle part of the transmission shaft is fixedly connected with a worm wheel between the two shaft seats, the worm and the worm wheel are meshed and connected, and the transmission shaft is rotatably connected with a transmission shaft. The device and the transmission device are rotatably connected with a rotating device, a water tank is fixed in the box, and the water tank is connected with a high-pressure pipe through a high-pressure pump, and the high-pressure pipe extends to the outside of the box body and is fixedly connected with a high-pressure nozzle. The invention relates to the field of rural road construction. The sprinkling device for newly-built roads uses a motor to drive a drive wheel to rotate and a high-pressure sprinkler to reciprocate, which solves the problem of traditional manual sprinkling, improves sprinkling efficiency, and reduces labor intensity.

The invention provides logging equipment and a coring and sampling method. The logging equipment comprises a main body, a sampling mechanism, a coring mechanism and an electronic control device. The sampling mechanism comprises a probe and a first push and backup arm retractably arranged on the two opposite sides of the main body. The coring mechanism comprises a coring drilling bit and a second push and backup arm retractably arranged on the two opposite sides of the main body. The electronic control device is used for controlling the main body, the sampling mechanism and the coring mechanismto carry out the sampling and coring operations, wherein the second push and backup arm can be used as a reverse push and backup arm of the sampling mechanism, and the first push and backup arm can be used as a reverse push and backup arm of the coring mechanism. According to the logging equipment and the coring and sampling method, the logging equipment which can complete coring and sampling operations at the same time by going down to a well once is achieved, and the first push and backup arm and the second push and backup arm can be correspondingly used for carrying out reverse push and backup operations, and the self-clamping-removal operation in the coring and sampling process is realized respectively. The logging equipment is easy and convenient to operate, the logging efficiency iseffectively improved, and the cost is reduced.

The invention relates to a multifunctional oil testing well completion pipe string and method for a well prone to blowout and leakage. The well completion pipe string comprises a drill rod (1), an expansion joint (2), an APC circulating valve (3), an anchoring seal (4), a well completion packer (5), an oil pipe (6), a pumping-out type plug (7), a mandrel hanger (8), a double male joint (9), an expansion pipe (10) and an adapter connector (11). The well completion pipe string and method can be used for oil testing well completion work of the well prone to blowout and leakage, it is achieved that the multifunctional oil testing well completion pipe string is rapidly installed in the well prone to blowout and leakage to pack a leakage zone, mass-mud leakage and pollution are avoided in the drilling process of a hydrocarbon reservoir, the number of pulling-out and going-in work times is decreased, the oil testing cycle is shortened, well-control safety risks are reduced, and the oil testing well completion efficiency is improved.

The invention relates to a novel hydraulic oscillator with energy gathering and damping functions. The novel hydraulic oscillator is fixedly mounted in the position close to a drill bit and comprises a damping assembly, a transmission assembly and an oscillating assembly. The oscillating assembly is mounted at the front end of the transmission assembly. The damping assembly is mounted at the rear end of the transmission assembly. Vibration generated on an upper tool by the oscillator during operating is absorbed through multiple stages of vibration absorption rings; bit pressure and torque are transmitted through a disk spring and splines, and the disk spring and the splines are connected in series. When flowing through a flow guide pipe, drilling fluid flows into a pressure chamber through flow guide holes in the circumference of the flow guide pipe and then flows back to a central flow channel, pressure pulsation of the drilling fluid fluctuates, and the oscillating assembly generates an oscillating effect. The novel hydraulic oscillator with the energy gathering and damping functions can generate the oscillating frequency of a certain range to reduce friction drag borne by a drilling tool in the rock breaking process of the drill bit, automatically absorb vibration and reduce the influence of the oscillating assembly on the upper drilling tool during operating, so that the well drilling efficiency is improved.

The invention relates to a directional deflecting acceleration device and a using method thereof. The directional deflecting acceleration device comprises a torque regulating short section, a clamping arm short section and a torque eliminating short section. An upper transmission piece and a lower transmission piece of the torque regulating short section achieve synchronous connection and disconnection through a torque locking piece. The directional deflecting acceleration device is installed above a drill collar in a dynamic drill assembly. The pitching pressure-out is adopted to start the torque regulating short joint, regulate the torque locking piece and cut the torque transmitting from a rotary table to a drill bit. Meanwhile, a bi-directional thrust ball bearing combination continues to keep the drill pressure being transmitted to the drill bit. Pumping pressure is increased, the clamping arm short joint extends outwards out of a clamping arm to clamp the well wall, the torque eliminating short joint is matched to enable the clamping arm short joint and the drill assembly below the clamping arm short joint to relatively fix the well wall, and well inclination azimuth is kept unchangeable. The device is compact in structure, convenient to operate, and capable of thoroughly solving the problem that the rate of mechanical penetration of a directional deflecting section is low.

The invention discloses a foam drainage gas production method, device and system. The method comprises the steps that the pressure value, detected by a detection device, of an underground space is obtained, the liquid accumulation height of the underground space is determined according to the pressure value of the underground space, and a control instruction corresponding to the accumulated liquidheight is generated, wherein the control instruction is used for controlling a putting device to put a foam discharge rod corresponding to the accumulated liquid height into the underground space. The technical problem that in the existing foam drainage gas production technology, quantitative chemical adding cannot be automatically conducted according to wellbore accumulated liquid is solved.

The invention discloses an anti-seizing tool capable of avoiding drill clamping and reducing sticky slipping to solve the problem that the rock breaking efficiency is low due to clamping and slipping in the drilling process. According to the main technical scheme, an upper connector, an upper shell, an adapter and a lower shell are sequentially connected through a thread; a compression spring is mounted on a compression spring guide rod, the low end of the compression spring guide rod pushes an anti-falling connector to enable a mandrel to stretch, and the anti-falling connector is connected with a mandrel thread and axially positioned through an adapter shaft shoulder; a steel wire rope system is arranged in a left-rotation mode, the upper and lower ends of the steel wire rope system are separately fixed to the lower end of the adapter and fixed into a circular groove in the upper end of a mandrel boss, the upper and lower ends of steel wire ropes are mounted by 30-40 degrees in an inclined mode, and the steel wire ropes are in a tensional state initially; during work, drilling pressure is transferred to the mandrel through the compression spring, and torque is transferred to the mandrel through the steel wire rope system; and when the mandrel rotates backwards, the steel wire rope system retracts to enable the mandrel to compress the compression spring to axially retract so as to decrease the cutting depth of a drill bit, and the drill bit is in a rock mass in the whole process.

The invention discloses a switch mode drilling tool bypass valve comprising the following elements: a valve body; a power unit connected with the valve body; a control unit electrically connected with a ground controller, the control unit is electrically connected with the power unit, and used for receiving a ground control signal so as to control the power unit motions; an execution unit arranged in the valve body and connected with the power unit so as to open / close the bypass valve. The switch mode drilling tool bypass valve can be timely opened / closed, and can be repeatedly opened.

The invention relates to a high-temperature and high-pressure digital geothermal well logging system. The high-temperature and high-pressure digital geothermal well logging system is characterized by comprising an outer pressure bearing pipe and an inner heat insulation pipe which are coaxially arranged; one end of the outer pressure bearing pipe is completely closed by a lower instrument connector; the other end of the outer pressure bearing pipe is completely closed by an upper instrument connector; one end of the inner heat insulation pipe is closed, and the other end of the inner heat insulation pipe is closed by the upper instrument connector and a temperature sensor connector; the inner heat insulation pipe is internally provided with a measurement assembly; and the measurement assembly comprises a temperature sensor, a pressure sensor, a NaI crystal and a photomultiplier. The high-temperature and high-pressure digital geothermal well logging system can conduct well temperature well logging, pressure well logging and gamma-ray well logging at the same time, various parameters can be comprehensively measured, and the outer pressure bearing pipe and the inner heat insulation pipe each form an independent sealing cavity; and heat insulation and pressure insulation of the interior and the exterior of the inner heat insulation pipe can be achieved smoothly, the reliable working temperature range is from -10 DEG C to +250 DEG C, bearing pressure is up to 55 MPa, and well logging under high temperature and high pressure working conditions is achieved smoothly.

The invention provides a backward-flowing prevention air hammer drill for foam drilling. The backward-flowing prevention air hammer drill is characterized by comprising a tapered check valve, wherein the tapered check valve is arranged on the upper part of a center hole of the backward-flowing prevention air hammer drill and at the lower end of a tail pipe of the drill, and comprises a valve element body and a valve plug; the valve element body comprises a valve element and a pipe plug; the valve plug is in interference fit with the center hole of the backward-flowing prevention air hammer drill; the valve element is in clearance fit with the center hole of the drill; the valve element and the pipe plug form the valve element body with a hollow inner part; the valve element body can float up and down along a vertical direction between an upper dead center and a lower dead center; the upper dead center is the highest point for the upward floating of the valve element body along the vertical direction; and the lower dead center is the lowest point for the downward floating of the valve element body along the vertical direction.

The embodiments of the invention disclose a target path determining method. The method includes the following steps that: trash bin images to be processed are obtained; a preset training model is adopted to process the trash bin images to be processed, wherein the preset training model is a function relation model of sample trash bin images and a trash bin saturation value, wherein the trash bin saturation value is used for indicating the degree of the trash filling of a trash bin; a target trash bin image is determined from the trash bin images to be processed according to the processing result of the preset training model; and a target path is determined according to the target trash bin image. The present invention also provides a target path determining device. According to the target path determining method and device provided by the embodiments of the present invention, on the one hand, the preset training model is adopted to judge the filling degree of the trash bin, and therefore, the method and device of the invention are not subject to the influence of external factors such as wind directions and temperature, and the improvement of the accuracy of detection can be facilitated, and on the other hand, a collection path can be constructed in advance, and therefore, the travels and route distance of a trash collection vehicle can be decreased, the efficiency of collection can be improved, and the waste of manpower and resources can be avoided.

A system for reducing tripping frequency of a power distribution line comprises a province dispatching data-side sub-system, a power grid operation and maintenance sub-system and a fiber transmissionline, wherein the fiber transmission line is used for connecting the province dispatching data-side sub-system and a power grid operation and maintenance sub-system, the province dispatching data-sidesub-system comprises a province dispatching data network, an acquisition server, a first data server, a first switchboard and a first photoelectric converter, the power grid operation and maintenancesub-system comprises a second photoelectric converter, an entity fireproof wall, a communication server, a second data server, a second switchboard and a working station, and an output end of the first photoelectric converter is connected with an input end of the second photoelectric converter via the fiber transmission line. A reliable and safe fault information control platform is formed by fully utilizing an existing network passage of a province power company and fault information of a province database; and by the system, the functions of fault information classified counting, comparisonanalysis, fault positioning, protection configuration setting and operation and maintenance suggestion can be provided according to fault tripping information and fault processing information.

The invention discloses a solidifiable flow sand bridge plugging method for a shaft of an oil and gas well, and relating to the technical field of fracture reconstruction work and rework operation used in petroleum extraction. 2-8 percent by volume of solidifiable particles, 20-30 percent by volume of quartz stand and 60-80 percent by volume of carrier fluid are mixed on the ground and then injected into the shaft; the mixed fluid is conveyed to a perforated interval; after the carrier fluid is heated and becomes less viscous by a stratum, filtrate enters the stratum; the solidifiable particles are cemented and solidified with the quartz sand under the effects of temperature and pressure to form high-strength solid so as to realize plugging of the shaft at the perforated interval. By using the method, pipe column trip is not required, and the operation risk caused by pipe column trip is avoided; the number of isolated intervals is not limited, so that an infinite series of layered / interval reconstruction operation can be theoretically realized.

The invention discloses a drill bit with a stabilizer. The drill bit is mainly used in the field of drilling of natural gas and oil and comprises a joint body (1), a drill bit body (12), a piston assembly (3) and a stabilizer structure, the piston assembly (3) is connected on the inner wall of the joint body (1) in a matched manner, the lower end of a lever bearing (10) in the stabilizer structure is axially supported in a groove of the drill bit body (12), a lever (5) is fixed at the upper end of the lever bearing (10) through a pin, one end of the lever (5) is abutted against the piston assembly (3) while the other end of the same is abutted against a roller bearing (6), a piston body (9) is fixed in the side wall of the joint body (1) through threaded connection, a roller (8) is mounted at the rear end of the roller bearing (6), and a spring B (7) is arranged between the roller bearing (6) and the piston body (9). The drill bit has the advantages of capability of avoiding well deviation, long service life and low cost.

The invention provides a large-diameter long-drilling-distance coring drilling tool and a coring drilling method. The drilling tool is composed of a single-action mechanism, an outer pipe assembly and an inner pipe assembly. The outer pipe assembly is provided with a set of outer pipe components sequentially connected in series from top to bottom. Each outer pipe component comprises an outer pipe and a reamer, and the outer pipe is in threaded connection with the reamer. The outer pipe of the outer pipe component located at the upmost end is assembled with the single-action mechanism. The reamer of the outer pipe component located at the lowermost end is assembled to a drill bit. The inner pipe assembly is provided with a set of inner pipe components which are sequentially connected in series from top to bottom. Each inner pipe component comprises a standard inner pipe and an inner pipe coupling. The standard inner pipe of the inner pipe component located at the uppermost end is assembled with the single-action mechanism. The invention further provides the drilling method. By the adoption of the large-diameter long-drilling-distance coring drilling tool and the coring drilling method, the problems that according to a small-diameter coring and large-diameter reaming finishing drilling mode, the number of parts and components of drilling equipment is large, operation steps are troublesome, the construction period is long, the engineering cost is high, and the hole accident risk is high are solved, and the purpose of improving the economical efficiency and safety of scientific drilling is achieved.

The invention relates to an electric bypass valve. The electric bypass valve comprises a valve body, a driving motor and a sliding sleeve. A plurality of first overflowing holes are formed in the circumferential direction of the valve body at intervals. The driving motor and the sliding sleeve are arranged in the valve body sequentially in a sleeved mode and are fixed connected in the circumferential direction. A plurality of second overflowing holes are formed in the circumferential direction of the sliding sleeve at intervals. When rotating according to the first direction, the driving motor drives the sliding sleeve to move in the axial direction of the valve body, and thus all the first overflowing holes communicate with the corresponding second overflowing holes. The electric bypass valve has the advantages that the electric bypass valve can be opened and closed at any moment according to actual needs so as to reduce the number of times of drill rising and falling.

The invention relates to an underground pressure monitoring device. The underground pressure monitoring device comprises an energy converter, an energy converter driving circuit, an encoding transcoding circuit, an annular pressure measuring element and a drill column internal pressure measuring element, wherein the energy converter, the energy converter driving circuit and the encoding transcoding circuit are connected with each other in turn; the annular pressure measuring element and the drill column internal pressure measuring element are respectively connected with the encoding transcoding circuit; an annular pressure signal measured by the annular pressure measuring element and a drill column internal pressure signal measured by the drill column internal pressure measuring element are transmitted to the encoding transcoding circuit for encoding and transcoding; the transcoded pressure signal is transmitted to the energy converter driving circuit for driving the signal; the energy converter is driven by the energy converter driving circuit to convert the transcoded pressure signal into a sound wave signal and then send the sound wave signal. The underground pressure monitoring device can achieve the purpose of accurately real-time converting the underground pressure into the sound wave signal while normally drilling; the drill column is used as a transmission channel and is independent of the drilling liquid; the noise jamming resistance is high; the transmission rate is high and the error rate is low; the underground pressure monitoring device is not influenced by the underground complex conditions, such as, gas invasion.

The invention relates to the technical field of circuit breakers. The invention particularly relates to an intelligent miniature circuit breaker based on the Internet of Things sea computing technology and a setting method. The circuit breaker comprises a collection unit, a monitoring unit and an execution unit; the collection unit comprises a data collection module and a signal processing module;the monitoring unit comprises a central processing unit integrating an Internet of Things sea computing algorithm and a metering module; the execution unit comprises a control module, a storage module and a communication module; the signal processing module is electrically connected with the data acquisition module and the metering module; the central processing unit is electrically connected with the metering module, the control module, the storage module and the communication module; and the data acquisition module comprises a current sampling circuit, a voltage sampling circuit, a leakagecurrent detection circuit and a temperature detection circuit, and sends current detection data, voltage detection data, leakage current detection data and temperature detection data to the central processing unit through the signal processing module and the metering module respectively.

A construction method for precision perforation drainage holes in coal mine underground roadways comprises a precision opposed perforation directional drilling tool assembly, a pull back-type reaming bit, a wall protective steel casing and the like. The method utilizes a measurement while drilling system, a deflecting drilling tool and a precise drilling track control technology to work accurately to perforate drilling holes to connect a water outlet roadway and a drainage roadway, after the drilling holes are perforated, the pull back-type reaming bit is replaced to expand in the reverse direction without lifting a drill, multistage reaming is conducted repeatedly, a variable diameter is changed in a perforation roadway, the wall protective casing with a large aperture is connected, the wall protective casing is cased off in the whole process in a pull-back mode, grouting solidification is conducted, and a drainage shock tube is mounted for filtering debris in water of the water outlet roadway. Therefore, the construction method of the precision perforation drainage holes in the coal mine underground roadways can effectively ensure that the drilling holes in the drainage roadway are perforated precisely and the large-diameter casing are cased off in the whole process, so that special drainage roadway excavation construction are replaced effectively, and cost of coal mine water treatment is greatly reduced.

The invention discloses an intelligent building monitoring device, and the device comprises a monitoring system. The monitoring system comprises a monitoring center, an environment monitoring module,a noise monitoring module, a parking space monitoring module, an analysis module and a storage module. The indoor and outdoor environments can be detected through the arranged environment monitoring module, the indoor and outdoor environment influence coefficients are obtained through the analysis module, the environment influence coefficients represent living comfort; meanwhile, the analysis module calculates the indoor and outdoor temperature difference, and when the indoor and outdoor temperature difference is greater than a set threshold value, the monitoring center sends a temperature difference early warning signal to the owner to remind the owner to increase or decrease clothes or reduce the number of trips, care is provided for the owner, and the user experience is improved. Publicparking spaces and private parking spaces in the community can be monitored through the arranged parking space monitoring module, and the community parking problem is intelligently processed in a user-friendly mode.

A foldable electric straight-beam bicycle with built-in batteries mounted in a front-back split mode is characterized in that a front frame cross beam 5 and a rear frame cross beam 11 are connected through a folding part 7 to form an integral frame cross beam, and the integral frame cross beam is parallel to the ground and is used for facilitating firmness and attractive appearance of a bicycle body. The central portion of the folding part 7 is hollow, a front battery 6 is mounted into the inside of the front frame cross beam 5 through the hollow portion of the folding part 7, and a rear battery 10 is mounted into the inside of the rear frame cross beam 11 through the hollow portion of the folding part 7. Due to the fact that the length of the rear frame cross beam is greater than that of the front frame cross beam and is about 2 times of the length of the front frame cross beam, and compared with an oblique-beam bicycle, the space for the batteries is increased by about 3 times, but the volume and the weight are not increased much and a riding journey is remarkably prolonged. The electric bicycle can be mounted into a luggage bag to be carried on the back after being folded, can be carried to a bus, can be ridden for a very-long-distance journey by means of the bus and facilitates environmental protection and road smoothness.