102results about How to "Lower Drilling Costs" patented technology

The invention discloses a drilling parameter optimization method and device and a storage medium, and relates to the technical field of parameter optimization, and the key points of the technical scheme are that the method comprises the following steps: establishing a drilling specific energy difference model and a mechanical drilling speed model; the drilling specific energy difference value is the difference value between the energy required for removing unit volume of rock and the pressure resistance degree of the rock lateral line; constraint conditions of the drilling parameters are determined, and a multi-objective optimization model is constructed according to the constraint conditions, the drilling specific energy difference model and the mechanical drilling speed model; and according to the multi-objective optimization model, well drilling parameters are optimized in real time, the optimal well drilling parameters of well drilling operation are determined, and the well drilling parameters of the well drilling operation are adjusted according to the optimal well drilling parameters. Through the optimization method, the multi-target optimization model can be formed by combining the mechanical drilling speed model and the drilling specific energy difference model, so that drilling parameters such as drilling pressure and rotating speed are realized under constraint conditions, optimization of the drilling parameters is realized, the drilling efficiency is improved, and the drilling cost is reduced.

The invention discloses a determination method for different origins of metallogenic fluids in a mountain-building type gold deposit in the south of Jiangsan. According to the method, through innovative sample collection and pretreatment, high-resolution sampling and fine treatment are carried out on specific parts of an ore deposit; advanced fluid inclusion comprehensive analysis is adopted, and inclusion information is accurately obtained in combination with multiple technologies; high-precision stable isotope determination and innovative interpretation in combination with a regional database are applied; element geochemical deep analysis and innovation index application are carried out, and SR-XRF and a machine learning algorithm are introduced; and finally, through comprehensive data fusion and intelligent analysis, constructing an intelligent platform and drawing a three-dimensional evolution model. The method can effectively integrate multi-source data, accurately determine the origin of the ore-forming fluid, overcome the limitation of a traditional method, improve accuracy and reliability, provide powerful support for deep exploration of ore deposit causes and prospecting exploration, and have important theoretical and practical significance.

The present invention discloses a historical well network fitting method, device, equipment and medium based on KD-tree, including: drawing a historical well location map of a target oil field according to the historical well location layout information of the target oil field; determining the well network center and the well network boundary map according to the historical well location map; based on the well network boundary map, taking the well spacing value, well network angle, longitudinal translation distance, lateral translation distance, well network rotation angle and well network positive and negative directions as variables, traversing several combinations, each combination corresponding to a well location map to be measured; based on the KD-tree algorithm, determining the number of the same wells in each well location map to be measured; using the well location map to be measured corresponding to the maximum number of the same wells as the target well location map of the target oil field. The present invention belongs to the field of well network layout. The present invention can improve the efficiency of well network design and save manpower and time costs.

The invention provides an underground circulating heat removal system and method, and belongs to the crossing field of geothermal development and petroleum engineering. The system comprises a sleeve, a formation water underground circulation assembly and an underground heat exchange device, wherein the formation water underground circulation assembly and the underground heat exchange device are arranged in the sleeve; the underground heat exchange device is connected with the formation water underground circulation assembly; and formation water in the geothermal water reservoir enters the underground heat exchange device along the formation water underground circulating assembly, and the formation water subjected to heat exchange is recharged into the geothermal water reservoir along the formation water underground circulating assembly to form circulating heat removal. By means of the underground formation water circulation assembly, formation water completely circulates underground and does not make contact with the outside, pollution to the formation water in the conveying process is reduced to a certain degree, and blockage of geothermal well rock stratum gaps is avoided as much as possible; according to the method, the same-layer reinjection of the formation water of the single well is realized through sidetrack drilling of the branch well sections, drilling of multiple wells is avoided, and the well drilling cost is saved.

The invention relates to the technical field of new energy, and provides a sandstone type rhenium ore favorable area determination method comprising the following steps: S1, obtaining distribution data and content data of uranium ore and rhenium ore, and establishing a rhenium ore distribution range model based on the distribution data and the content data; s2, dividing layers, and determining a main exploration target layer; s3, samples are collected in the target layer and tested and analyzed to determine the distribution range and content of uranium ore and the content of rhenium ore; and S4, delineating a rhenium ore favorable area based on the distribution range and content of the uranium ore, the content of the rhenium ore and the rhenium ore distribution range model. According to the method, the rhenium ore exploration cost can be effectively reduced, the success rate is increased, and the method has high application value.

The screw drill cardan shaft assembly comprises a connecting rod, the two ends of the connecting rod are each provided with a movable shaft, and each movable shaft can be connected into a rotor connector in a universal rotation mode; and the side wall of each rotor joint can be inserted into the side wall of the connecting rod in a shifting fork manner. Through shifting fork type insertion connection of the rotor connector and the connecting rod, plane planetary motion of the screw motor rotor is converted into concentric rotation motion, transmission of rotation torque is achieved, the screw drill and the drill bit are matched to effectively break rocks, the mechanical drilling speed is increased, it is guaranteed that the screw drill meets underground application conditions, and the tripping frequency is reduced.

The invention relates to the field of oil field drilling, and discloses a method, a system, a medium and equipment suitable for judging a rheological mode of drilling fluid in a polar region, and the method comprises the following steps: drawing a shearing stress-shearing rate rheological curve of the drilling fluid under various temperature conditions according to rheological property experimental measurement data; calculating the plastic viscosity, the dynamic shear force, the flow index and the consistency coefficient of the drilling fluid; fitting the rheological curve of the drilling fluid under each temperature measurement condition based on the plastic viscosity, the dynamic shear force, the flow index, the consistency coefficient and the constitutive equation of the four rheological modes; wherein the four rheological modes comprise a Bingham mode, a power law mode, a Casson mode and a Heschel-Balcoril mode; drawing a fitting curve according to a fitting result, and solving mean square errors and judgment coefficients of the four rheological modes under each temperature condition; and judging the applicability of the four rheological modes to the polar drilling fluid measured under different temperature conditions through the judgment coefficients so as to determine the rheological mode with the best applicability.

The invention discloses a processing method for etching high-density holes in a PCB panel, and belongs to the technical field of PCB panel etching holes.The processing method for etching the high-density holes in the PCB panel comprises the steps that a film is manufactured according to the hole opening position of a PCB, and a dry film is attached to the surface of a substrate; transferring the hole position pattern on the film to a copper surface through an exposure and development process; removing the part, which is not completely removed due to development, of the pattern so as to ensure the integrity of the pattern; chemical etching is carried out, so that the copper surface at the position of the hole is etched, the substrate is exposed, and then the mask attached to the surface of the PCB is removed; and putting the substrate into plasma equipment, and simultaneously etching the exposed substrate at the trepanning position by using plasma. As the density of the blind holes is higher and higher and the size of the blind holes is smaller and smaller, the plasma hole carving shows the advantages because the total cost is not increased along with the increase of the density of the through holes, and the higher the density of the holes is, the lower the cost allocated to each hole in the plasma drilling process is.

The embodiment of the invention provides a PDC drill bit abrasion evaluation method, device and equipment, and the method comprises the steps that real-time logging data of a PDC drill bit are obtained, and the real-time logging data comprise the drill bit rotating speed, the mechanical drilling speed and the drilling pressure; determining abrasion indexes of the PDC drill bit according to the drill bit rotating speed, the mechanical drilling speed and the drilling pressure; and determining the current wear degree of the PDC drill bit according to the wear index of the PDC drill bit. Based on the real-time logging data, real-time quantitative evaluation of the abrasion degree of the PDC drill bit is achieved, a scientific basis is provided for drill bit parameter adjustment and drill bit replacement, then the drilling cost can be reduced, and the drilling period can be shortened.

The invention belongs to the technical field of solar energy, and particularly relates to a side opening type strong magnetic fisher which comprises a base body, a connector is fixedly connected to the upper portion of the base body, a baffle is fixedly welded to the lower portion of a cylinder of the base body, a bottom plate is fixedly welded to the interior of a semicircular cylinder of the base body, and an insulating partition plate is arranged on the bottom plate. A strong magnetic positioning block and a strong magnet are arranged on the insulating partition plate, and the strong magnetic positioning block, the strong magnet, the insulating partition plate and the bottom plate are fixed together through screws. Due to the fact that the shifting plate is arranged on the outer side of the semicircular cylinder of the novel side-opening type strong magnetic fisher, a large gap is formed between the well wall and the semicircular cylinder, drilling fluid can return upwards easily, the semicircular cylinder can be protected against excessive abrasion, and the service life of the side-opening type strong magnetic fisher is prolonged.

The invention provides an injection well system for sealing and storing carbon dioxide on a seabed sedimentary layer and a sealing and storing method. The injection well system comprises an underwater blowout preventer and an injection main well which is arranged below the underwater blowout preventer and provided with a seabed monitoring unit. The injection main well penetrates through a deposition layer and then sequentially extends out of a first horizontal branch well from a hydrate stabilizing layer, extends out of a second horizontal branch well from a salt water layer and extends out of a third horizontal branch well from an oil and gas layer. And a CO2 conveying unit is arranged at an inlet of the injection main well. According to the injection well system and the sealing method, carbon dioxide injection of a hydrate stable layer, a salt water layer and an oil and gas layer is achieved at the same time through one injection well, the problems that at present, the offshore carbon dioxide sealing capacity is limited, and cost is high are solved, well drilling and operation cost is effectively reduced, and economic benefits are increased.

The invention relates to rock sample testing equipment. The rock sample testing equipment comprises a clamp holder, a confining pressure system, a medium circulating system, a displacement sensor, an extensometer, a balance and a differential pressure sensor, the clamp holder comprises a clamp holder base and a cavity fixed on the clamp holder base, and a cavity is formed in the cavity; the confining pressure system is connected to the clamping device and used for injecting confining pressure liquid into the cavity. The medium circulating system is connected to the rock core and is used for injecting drilling fluid into two ends of the rock sample; a rubber sleeve is attached to and surrounds the rock sample, and an extensometer is arranged on the outer side of the rubber sleeve; a clamp holder sealing end cover is arranged at the bottom of the clamp holder, and a piston fixed on the clamp holder sealing end cover is arranged in the cavity; the balance is connected to one end of the rock sample; the differential pressure sensor is connected to two ends of the rock sample. According to the scheme provided by the invention, the pressure transmission process and the chemical potential difference induced seepage pressure process of the shale at high temperature and high pressure can be simulated, the drilling efficiency is improved, and the drilling cost and the risk of borehole wall instability are reduced.

The invention relates to a composite drill bit capable of changing a rock cutting mode without pulling out of a hole, which belongs to a drilling exploration tool and comprises a drill bit base body and a centralizing edge arranged on the periphery of the drill bit base body and integrated with the drill bit base body, the centralizing edge is formed by alternately arranging a fixed drill bit mounting seat and convex edges, and the length of the fixed drill bit mounting seat is greater than that of the lower edge of the drill bit base body; a cavity is formed in the lower portion of the drill bit base body. A movable seat is mounted in the cavity, movable drill bit mounting seats are fixed below the movable seat, a moving channel is formed between the movable drill bit mounting seats and below the movable seat, a flow guide pipe is arranged in the drilling tool connector and penetrates through the cavity and the movable seat, the lower end of the flow guide pipe is arranged in the moving channel, and a plurality of flow guide holes are formed in the periphery of the outer wall of the lower middle section of the flow guide pipe. According to the device, the drill bit can be rapidly replaced under the condition of not pulling out a hole, the device is suitable for a stratum structure where heterogeneous rocks (conglomerate rocks) and homogeneous rocks frequently and alternately occur, the non-working time occupied by pulling out the hole and replacing the drill bit is shortened, the drilling cost is reduced, the labor intensity of workers is reduced, and the drilling efficiency is improved.

The invention provides a gas field planning yield prediction method which comprises the following steps: selecting a typical well, and establishing a whole production cycle single well yield profile for the typical well; according to the single well yield profile, determining a relational expression between the total yield of each time node in the planned yield profile and the monthly deployment well number and the monthly yield of the corresponding typical well; and determining the total yield of each time node of the overall yield profile of the gas field according to the relational expression. By means of the scheme, gas field planning yield prediction can be rapidly carried out for multiple time nodes, and the accuracy and efficiency of yield planning are improved.

The present invention discloses a real-time drilling parameter optimization method and system based on extreme value optimization, including obtaining logging engineering parameters under real-time working conditions, obtaining a rock breaking strength baseline under the optimal drilling state of the target well, constructing a rock breaking energy model under a composite working condition taking into account the output loss of the screw, calculating the virtual rock breaking strength, and determining the rock breaking efficiency and abnormal working conditions downhole in real time, and assisting in finding the unstable drilling parameter threshold under the composite drilling condition. Taking the rock breaking strength baseline as the adjustment target for minimizing the virtual rock breaking strength, comprehensively considering the above-mentioned unstable drilling parameter thresholds, a multivariable extreme value optimization algorithm is used to adjust the parameter combination, and finally obtain the recommended drilling parameter combination under the minimum virtual rock breaking strength. The present invention realizes the recommendation and optimization of the best drilling parameters based on the real-time virtual rock breaking strength calculation and optimization under the composite drilling condition, which can effectively avoid the blind spots of empirical drilling data and realize the optimization of drilling parameters throughout the process.

The application discloses a dynamic shale gas horizontal well stratum dip angle prediction method, which comprises the following steps: establishing a shale reservoir velocity model; preparing a shale reservoir structure map, and designing depths of target points A and B of a shale gas horizontal well, wherein the target point A is a starting position of a horizontal section of the shale gas horizontal well, and the target point B is an ending position of the horizontal section of the shale gas horizontal well; calculating a stratum dip angle alpha of the whole horizontal section according to a horizontal distance and a longitudinal distance between the target points A and B; after entering the target point A, a stratum dip angle beta is predicted by using depth data of first and last points of a preset distance drilled this time, the velocity model is updated by using the depth data of the first and last points of the preset distance drilled this time, the structure map is prepared again, a stratum dip angle gamma of a next drilling distance of the horizontal section is predicted by using the prepared structure map again, and a reference stratum dip angle theta of the next drilling distance of the horizontal section is determined according to the three stratum dip angles alpha, beta and gamma, so as to serve as a guide for drilling of the horizontal well. The method can effectively improve a high-quality shale drilling ratio of the shale gas horizontal well, improve drilling efficiency of the horizontal well and save drilling cost.

The present invention discloses an experimental device and method for induced polarization of a nanopore array simulating rock and soil pore structure, and relates to the technical field of electrical prospecting experiments. It comprises an experimental container, wherein a cavity is arranged in the experimental container, power supply electrodes are arranged at both ends of the cavity, a solid nanoplate is arranged in the middle of the cavity, and the space between the power supply electrode and the solid nanoplate is used to accommodate an electrolyte solution; a plurality of nanopores are arranged on the solid nanoplate, and the power supply electrode is used to apply a direct current electric field to the electrolyte solution, so that the ions in the electrolyte solution move in a directional manner from the nanopores to produce a polarization effect. The present invention studies the induced polarization effect in solid nanopores through experiments, reveals its microscopic mechanism, establishes a quantitative model, and explores the main factors and response laws that affect the induced polarization effect.

The application discloses a PDC drill bit suitable for continuous and rapid drilling of a limestone stratum and application thereof. The drill bit comprises a drill bit body, the drill bit body is provided with a blade wing, and the blade wing is provided with cutting teeth arranged in double lines. The double lines comprise a main line and a secondary line, the main line and the secondary line are located on the same crown line, the main line is located on an infeed contact surface of the blade wing, and the secondary line is located behind the main line. The cutting teeth comprise plane teeth and flow-passing special-shaped cutting teeth, the main line is provided with main line plane teeth, and the secondary line is provided with flow-passing special-shaped cutting teeth. The flow-passing special-shaped cutting teeth are provided with a through tooth flow passage, and the blade wing is provided with a blade wing flow passage corresponding to the tooth flow passage. The application adopts the same crown line double line tooth arrangement, greatly reduces the impact force on the cutting teeth, and avoids early damage of the cutting teeth. The application is provided with the tooth flow passage and the blade wing flow passage, improves the cooling effect of the cutting teeth, avoids thermal damage of the cutting teeth, prolongs the service life of the cutting teeth, and ensures that the drill bit has continuous aggressiveness.

The utility model discloses a perforating machine which comprises a machine frame. The material cavity is used for placing paper to be punched, and a plurality of first connecting rods are arranged at the bottom of the material cavity; the positioning mechanism is used for adjusting the punching position and comprises a lifting mechanism and a left-right adjusting mechanism; the vibrating mechanism is used for arranging the paper and can drive the material cavity to vibrate; the punching mechanism comprises a drilling device, a driving mechanism and a first side plate, the driving mechanism drives the drilling device, the first side plate is arranged on the rack, a punching opening is formed in the first side plate, and the driving mechanism can drive the drilling device to punch paper placed in the material cavity. Paper in the vibration cavity is driven by the vibration mechanism to vibrate, so that a large amount of paper to be punched is tidied. Manual arrangement is not needed, and operation is convenient. And the punching cost is reduced while the punching efficiency is improved.

The application provides an inversion method for describing the connectivity of the internal reservoir of a faulted karst body. The method uses seismic attributes reflecting the outline of the faulted karst body, the holes and cracks in the faulted karst body, establishes a comprehensive low-frequency model reflecting the carbonate bedrock, the faulted karst body, and the crack and hole system in the faulted karst body, uses the model to perform post-stack constrained sparse pulse inversion, obtains a longitudinal wave impedance data body of the underground, and uses the longitudinal wave impedance data to give a longitudinal wave impedance threshold value of the reservoir, and describe the connectivity of the internal reservoir of the faulted karst body in space.

The utility model discloses an integral cardan shaft for screw drill and the screw drill applying the same, the cardan shaft comprises a rotor connecting part, a transmission shaft connecting part and a universal connecting rod, the two ends of the universal connecting rod are respectively inserted into the rotor connecting part and the transmission shaft connecting part; sealing connecting assemblies are arranged between the two ends of the universal connecting rod and the rotor connecting part and between the two ends of the universal connecting rod and the transmission shaft connecting part. According to the integral type universal shaft for the screw drill and the screw drill applying the integral type universal shaft, a universal head and a connecting rod of a traditional structure are made into a whole through the universal connecting rod, a movable hinge and a universal head base are made into a whole through the rotor connecting part, and a connected water cap and the universal head base are made into a whole through the transmission shaft connecting part, so that the integral type universal shaft is simple in structure, convenient to use and high in practicability. The number of parts is small, assembly is convenient, after downhole operation, the abrasion condition of the parts can be effectively reduced, the service life is prolonged, frequent replacement of the parts is prevented, the drilling efficiency is improved, and the drilling cost is reduced.

The invention relates to a deep oil and gas reservoir and hydrate reservoir well group collaborative mining method which comprises the following steps: 1, determining a target area, and selecting a hydrate layer and deep oil and gas reservoir coupling symbiotic area; 2, horizontal wells and vertical wells are arranged, the horizontal wells are arranged on the hydrate layer of the target area, and the vertical wells are arranged around the horizontal wells; thirdly, perforation and reservoir transformation operation are conducted on the horizontal well located in the hydrate layer section and the vertical well located in the deep oil and gas layer section; and 4, exploiting oil gas and hydrates. The method has the advantages that heat carried by fluid during deep oil and gas reservoir exploitation is used for promoting hydrate layer exploitation, the problem that the decomposition rate is reduced due to the influence of heat transfer in the later period of hydrate decomposition is effectively solved, and the defect that a traditional heat injection method is high in cost is overcome; a deep oil and gas reservoir production well is utilized, so that the drilling cost is effectively reduced, and the application value is very high; by arranging the well groups, later adjustment is easy, hydrate is efficiently mined while deep oil gas is mined, and economic benefits are high.

The present invention discloses a method and device for constructing a seismic velocity body. The method comprises: selecting the time-depth relationship of the drilled wells in the target area that meets the requirements based on the synthetic seismic records and actual seismic records of the drilled wells in the target area; determining the velocity data of the drilled wells according to the time-depth relationship of the drilled wells; extracting the preferred seismic attributes related to the target layer based on the velocity data, the seismic interpretation layer of the target layer and the seismic data body; fitting the layer velocity body of the target layer based on the time-depth relationship of the drilled wells, the seismic interpretation layer and the seismic attributes related to the target layer and the pre-established time structure model of the target layer; establishing the average velocity body from the surface to the target layer based on the layer velocity body of the target layer to obtain the seismic velocity body of the target area. It can effectively guide the preferred exploration target of the target area, improve the success rate of the deployment of exploration wells, optimize the drilling footage, save drilling costs, and improve the exploration efficiency of the early exploration blocks.

A horizontal well automatic drilling system device and control method based on bottom hole drilling pressure, comprising a derrick arranged on an upper plate, a safety fence arranged on the top of the derrick, a pulley arranged on one side of the safety fence, a steel wire rope passing through the pulley, one end of the steel wire rope connected to the winch drum, and the other end connected to a large hook, the lower end of the large hook load is connected to a tension sensor, the lower end of the tension sensor is connected to a drill string, and the end of the drill string is a drill bit. The present invention improves the mechanical drilling speed, maintains stable drilling of the downhole drilling tool assembly, and ultimately achieves the purpose of real-time and accurate control of the bottom hole drilling pressure.

The invention discloses a historical well pattern fitting method, device, equipment and medium based on KD-tree, and the method comprises the steps: drawing a historical well location map of a target oil field according to the historical well location arrangement information of the target oil field; according to the historical well location map, determining a well pattern center and a well pattern boundary map; based on the well pattern boundary map, a well spacing value, a well pattern included angle, a longitudinal translation distance, a transverse translation distance, a well pattern rotation angle and the positive and negative directions of the well pattern are used as variables, a plurality of combination modes are traversed, and each combination mode corresponds to one to-be-measured well position map; based on a KD-tree algorithm, the number of the same wells in each to-be-measured well location map is determined; and taking the to-be-measured well location map corresponding to the maximum number of the same wells as a target well location map of the target oil field. The invention belongs to the field of well pattern arrangement. The well pattern design efficiency can be improved, and the labor cost and the time cost are saved.

The invention relates to the field of drilling engineering, in particular to an intelligent drilling tool capable of preventing rock debris deposition and an operation method of the intelligent drilling tool. The stirring assembly comprises a middle pipe body, a linear motor, a rack shaft, a rack, a gear, a gear shaft, a limiting spring, a screw cap, a blade assembly, a locking nut, a gasket, an electric wire and a sleeve; the control assembly comprises a sliding block, a telescopic assembly, a pressure sensor, a position sensor and a control box. The stirring assembly is responsible for crushing and stirring rock debris; the control assembly intelligently adjusts the working mode, the working rotating speed and the working position of the blade assembly according to the rock debris deposition condition and the actual working condition. The device has the beneficial effects that the structure is simple, intelligent control can be realized, rock debris deposition can be effectively prevented, a rock debris bed can be effectively removed, the drilling efficiency is improved, the drilling period is shortened, and the drilling cost is reduced.

The invention relates to the technical field of drilling exploitation, in particular to drilling equipment therein, in particular to a flexible PDC drill bit and a composite drill bit, the flexible PDC drill bit comprises a drill bit body and a blade body, and a plurality of cutting elements are formed on the blade body; at least one blade wing comprises a buffering part and a supporting part, a separation groove is formed between the buffering part and the supporting part, and the cutting element is arranged on the buffering part. By means of the combined blade body composed of the buffering part and the supporting part and the separation grooves with certain intervals, the variable stiffness characteristic that the drill bit can be adjusted in a self-adaptive mode along with load changes is achieved. When the drill bit encounters a violent instantaneous impact load, the blade bodies can generate micro displacement due to the existence of the separation grooves, and the buffering effect is achieved. The service life of the drill bit in a deep well and a stratum difficult to drill is greatly prolonged, and the non-production time and the comprehensive drilling cost are remarkably reduced.

The utility model discloses a novel stepping platform based on sliding of a coal bed gas drilling machine. The novel stepping platform comprises at least one platform single body. Each platform single body comprises an upper wing plate and a lower wing plate which are arranged in parallel up and down, and a plurality of reinforcing plates and a web plate are arranged between the upper wing plate and the lower wing plate; the web plate penetrates through the reinforcing plate; two rows of walking holes are formed in the top face of the upper wing plate in the length direction, a lubricating oil groove is formed in the top face of the upper wing plate in the length direction, and the lubricating oil groove is formed between the two rows of walking holes. The sliding device is safe, fast and reliable to use, easy to machine, less in repair and maintenance and capable of meeting the sliding requirement of the coal bed gas drilling machine.

The present invention relates to a construction device and a construction method for surface open-circuit drilling of shallow gas drilling in development wells. The construction device of the present invention comprises a conduit fixing frame fixed on the seabed, on which an underwater conduit deep into the seawater and an extension conduit extending out of the sea level are fixed, and the underwater conduit and the extension conduit are connected after the shallow gas is discharged; the construction method of the present invention comprises: firstly sinking the underwater conduit into the seawater; then drilling in the underwater conduit so that the shallow gas is discharged into the seawater through the underwater conduit, and then connecting the extension conduit on the top of the underwater conduit to form a waterproof conduit; finally, continuing drilling in the waterproof conduit. The construction device and the construction method for surface open-circuit drilling of shallow gas drilling in development wells provided by the present invention implement surface open-circuit drilling by establishing an underwater conduit, and the gas released from the shallow stratum during the drilling process overflows and is discharged into the seawater through the underwater conduit, so as to avoid the shallow gas returning to the drilling well or the production platform to cause a blowout and fire, thereby affecting the safety of the drilling operation.

The utility model discloses a continuous drilling tool for ocean deepwater drilling. The continuous drilling tool comprises a main body, a sleeve, a mandrel, a locking block, a locking block and a release ring, the inner surface of the body is provided with threads and screwed with the threads on the outer surface of the sleeve, a plurality of first through holes are distributed in the circumferential direction of the body, the locking blocks are located in the first through holes, a first containing groove is formed between the body and the sleeve, and the outer wall of the sleeve is provided with a wedge-shaped conical face with a downward inclined face. The mandrel is sleeved with the sleeve, a second containing groove is formed between the mandrel and the sleeve, a plurality of second through holes are distributed in the sleeve in the circumferential direction, the locking block is located in the second through holes, the release ring is located at the upper end of the locking block, and when the mandrel is locked, the front end of the locking block is located in the second containing groove. According to the utility model, the low-pressure conduit head can be tripped in once drilling and the drilling operation of the next borehole can be continued, so that the tripping times are reduced, the cost is saved, and the efficiency is improved.