103 results about "Directional well" patented technology

The invention provides a goaf directional drilling grouting reinforcement method which comprises the following steps: S1, determining a goaf treatment engineering grade and a design standard, and delimiting a goaf treatment range according to the engineering grade and the design standard; the method comprises the steps of S1, determining the position, coordinates and spatial arrangement of a drilling target spot, S2, determining the position, coordinates and planar arrangement of a directional well site, wellhead coordinates and planar arrangement of a directional well site, S4, designing a drilling track form and a drilling well bore structure, and S5, designing a drilling track form and a drilling well bore structure, the drilling track form comprising at least one of a straight line-curve form, a straight line-curve-straight line form and a straight line-curve-curve form. And S5, the drilling technology and drilling track control are determined, and drilling and drilling track control are conducted through directional drilling track measurement control equipment, near-bit geosteering equipment and rotary steering drilling equipment. The goaf directional drilling grouting reinforcement method is wide in treatment range, low in treatment cost and low in construction risk.

The utility model relates to a thermal recovery layered injection-production pipe column suitable for a highly-inclined directional well, which comprises a casing pipe, a heat insulation oil pipe, a jet pump, a high-temperature deep well safety valve, a high-temperature deep well thermal recovery packer, a heat insulation type compensator, an oil pipe and a plurality of target horizon combinations connected through the oil pipe, wherein the heat insulation oil pipe, the jet pump, the high-temperature deep well safety valve, the high-temperature deep well thermal recovery packer, the heat insulation type compensator and the oil pipe are arranged in the casing pipe and sequentially connected. Separation sealing combinations are arranged among the target layer combinations, and a thermal recovery exhaust valve is arranged on the high-temperature deep well thermal recovery packer and connected with an external control system through a hydraulic control pipeline. The thermal recovery layered injection and production pipe column suitable for the highly-deviated directional well can be safely lifted under the highly-deviated well condition, two different working conditions of steam injection and adoption are met, and a solution of layered steam injection, shaft heat insulation, shaft safety and injection and production integration is provided.

The invention relates to the field of gas production devices, aims to solve the problems that a gas lift drainage gas production device is large in stratum back pressure, small in production pressure difference and not easy to produce gas, and provides a stratum low-back-pressure drainage gas production device and a using method thereof.The stratum low-back-pressure drainage gas production device comprises a small oil pipe, a large oil pipe, a lifting device, a sitting hanging short circuit and a one-way valve; an annular flow channel is formed between the large oil pipe and the small oil pipe; the lifting device is arranged in the small oil pipe and provided with a main flow channel in the axial direction of the small oil pipe. The hanging pup joint is arranged on the small oil pipe and located below the lifting device, and the inner space of the hanging pup joint is communicated with the large oil pipe. The one-way valve is arranged below the large oil pipe; an outlet of the one-way valve faces a wellhead. A check valve tubular column structure is adopted, gas serves as power, underground liquid is sucked, and due to the fact that no rod column is arranged, the device is suitable for a vertical well, a directional well, a complex structure well, a horizontal well and the like; after the efficiency of the lifting device is reduced, back flushing of the lifting device is achieved through the sitting and hanging pup joint, and the lifting device is convenient to salvage.

The utility model relates to the field of salvaging devices, in particular to a directional well salvaging device. The device comprises a mounting shell, a pair of fixing shafts is arranged in the mounting shell, an anti-falling assembly is movably arranged on the two fixing shafts, a transmission assembly is further movably arranged in the mounting shell, and the anti-falling assembly is in transmission connection with the transmission assembly. The problem that in the oil-water well workover operation, some metal sundries often appear in a shaft, and if the metal sundries are not salvaged in time, workover equipment is possibly damaged is solved. And the transmission assembly is arranged to be matched with the anti-falling assembly, so that the adsorbed metal fragments can be covered, the situation that when the device is recycled, the metal fragments adsorbed by a strong magnet collide with the inner wall of a hoistway and fall off is effectively prevented, and the fishing effect is improved. And by arranging the storage disc at the top of the mounting shell, sundries floating on the surface of the liquid in the well can be fished and recycled, and the fishing effect is better.

The utility model relates to the technical field of directional well casing centralizing, in particular to a directional well casing centralizing device. Comprising an upper sleeve and a lower sleeve, a plurality of mounting grooves are evenly distributed in the outer portion of the upper sleeve in the circumferential direction, elastic pieces are detachably connected into the mounting grooves, a plurality of inserting grooves corresponding to the mounting grooves are formed in the outer portion of the lower sleeve, and the bottom ends of the elastic pieces are inserted into the inserting grooves; a mounting groove is formed in the elastic piece, a fixing block is arranged in the mounting groove, the elastic piece is provided with a groove, the fixing block is inserted into the groove, and the fixing block is provided with a movable limiting assembly. According to the centralizing device, each elastic piece can be detached independently, the damaged elastic pieces can be replaced in a targeted mode, and the centralizing device is convenient to use.

The invention discloses a cost optimization method and system for a buried pipe system, and relates to the technical field of buried pipe systems.The cost optimization method comprises the following steps that an optimization problem is solved, and a well track of a directional well group is obtained; a well group arrangement diagram is generated through the well track, and a buried pipe system numerical model is constructed based on the well group arrangement diagram; performing operation simulation on the numerical model of the buried pipe system, and determining the annual operation cost of the buried pipe system, the system operation cost of the whole life cycle and the average energy cost according to a simulation result; and correcting the initial investment cost, the annual operation cost, the system operation cost of the whole life cycle and the average energy cost according to the actual project condition. According to the method, efficient space utilization of the well group is achieved, and meanwhile the economical efficiency and the long-term stability of the system are improved by combining initial investment measurement and calculation, long-term operation parameter simulation and dynamic optimization of actual operation data.

The application provides a method for calculating the ground stress based on the whole process formation leak-off test of a directional well, comprising the following steps: performing the whole process formation leak-off test on the target directional well and recording the test data; calculating the horizontal minimum ground stress and the overburden pressure according to the test data of the whole process formation leak-off test and the rock mechanics characteristic parameters of the target directional well; calculating the fracture pressure value under all possible arrangement combinations of the horizontal maximum ground stress and the horizontal minimum ground stress at the well deviation azimuth of the target directional well according to the stress distribution around the well section of the formation leak-off test well and the tensile failure criterion; drawing the contour map of the fracture pressure to establish the ground stress query chart of the target directional well; and querying the horizontal maximum ground stress corresponding to the calculated horizontal minimum ground stress in the ground stress query chart. The application calculates the ground stress based on the test data of the whole process formation leak-off test of the target directional well, and effectively improves the accuracy of the calculation result of the ground stress size.

This invention discloses a method for optimizing a geological model by scanning the well inclination angle. It aims to solve the problem of low efficiency and poor accuracy in directional drilling where the geological model inclination angle is constantly fitted to the actual drilling curve to correct the geological model. The core steps are as follows: Step 1: Establish a geological steering model for the current drilling based on the logging and structure of the completed well. Step 2: Set the actual logging curve of the drilling trajectory AB segment as the target curve, and extract the simulated curve from the geological steering model along this segment of the well trajectory. Step 3: Set the inclination scanning range 'a' and the scanning step size 'dlt', read the well inclination angle ∠A at point A, and perform an inclination scanning of the well inclination of segment AB with a step size of 'd1t' within the range of ∠A-a to ∠A+a, extracting the simulated curve from the model at each inclination angle. Step 4: Calculate the similarity between the simulated curve and the target curve using the similarity calculation formula within the range of ∠A-a to ∠A+a, and record the inclination angle difference when the similarity is the maximum. Step 5: Use the angle difference recorded in Step 4 to make the geological model angle after point A equal to the original angle plus the angle difference. Step 6: To ensure continuous model updates, calculate the inclination point forward from point A, thereby guiding directional drilling.

The invention discloses a double-magnetic-source signal generating device and a drill bit orientation verification device and method, and relates to the technical field of drilling, and the double-magnetic-source signal generating device comprises a drill bit, a lower magnetic connector, a bent screw drill, an upper magnetic connector, a non-magnetic drill collar and a drill pipe column which are sequentially connected end to end; the driving device is arranged on the ground surface, is connected with the drill pipe column and is used for driving the drill pipe column to drive the upper magnetic connector and the non-magnetic drill collar to rotate at a first rotating speed, and the upper magnetic connector generates a low-speed magnetic line of force; the earth surface slurry pump circularly drives the rotor of the bent screw drill to rotate at a second rotating speed, the output shaft of the bent screw drill drives the lower magnetic connector and the drill bit to rotate at a third rotating speed, and the lower magnetic connector generates a rapid magnetic line of force; wherein the third rotating speed is the sum of the first rotating speed and the second rotating speed. The azimuth angle of the drill bit can be verified, and accurate butt joint of the drill bit of the directional well relative to the target position is ensured.

The utility model relates to a movable wall repairing device while drilling, which is used in petroleum, natural gas and geological well drilling. According to the technical scheme, the movable wall repairing device while drilling is composed of a body, a rotating resistance reducing layer, a well repairing friction and torque reducing sleeve and a plug. The rotating resistance-reducing layer is installed on the body, the well repairing friction-reducing and torque-reducing sleeve is installed outside the rotating resistance-reducing layer, one ends of the rotating resistance-reducing layer and the well repairing friction-reducing and torque-reducing sleeve are positioned through a shaft shoulder of the body, the other ends of the rotating resistance-reducing layer and the well repairing friction-reducing and torque-reducing sleeve are positioned through threaded connection of the plug and the body, and hard alloy is welded on the outer surface of the well repairing friction-reducing and torque-reducing sleeve which is provided with a diversion trench. The friction-reducing and torsion-reducing sleeve for well repair is simple in structure, rubber materials used by the rotary resistance-reducing layer have the advantages of being good in abrasion resistance, low in friction coefficient and the like, the friction-reducing and torsion-reducing sleeve for well repair can correct well walls and reduce friction and torsion, and the friction-reducing and torsion-reducing sleeve for well repair can be used for deflecting operation and bent borehole drilling in vertical wells, horizontal wells and large-displacement directional wells and can reduce friction and torsion and trim well walls in the drilling process. The power transmission loss of the drill column is reduced.

The invention discloses a method for pre-extracting coal seam gas by combining high-density well spacing with small-scale hydraulic fracturing, and belongs to the technical field of coal seam gas ground pre-extraction outburst elimination. The method comprises the following steps: deploying a plurality of ground gas extraction vertical wells and directional wells with two-opening well bore structures in a coal face according to a square well pattern with the distance between targets being 50-60m, tripping in a sleeve after drilling a two-opening well section, and packing an annular channel between the lower part of the sleeve and a well wall by using a packer outside the sleeve, so that a closed space is formed at the lower part of the gas extraction well; after small-scale hydraulic sand fracturing, overflow releasing and well flushing of a pre-exploited coal seam are carried out on the ground in a light casing pipe injection mode through small fracturing equipment, drainage and mining equipment such as an electric submersible pump and an underground pressure meter are put into a casing pipe, and drainage gas production and negative pressure gas extraction operation are carried out in sequence. By means of the method, low-cost and rapid pre-drainage of coal seam gas of the coal face can be achieved, the gas outburst risk in the coal roadway tunneling and working face stoping process is remarkably reduced, and economic, environmental and social benefits are achieved.

This invention discloses a quasi-horizontal well fracturing process for directional shale oil wells. It includes the following steps: S1: Based on the geological and engineering data of the fault-block shale oil reservoir, combined with the fracture parameters of previous fracturing wells in the block, determine the three-dimensional stratification and clustering of the directional well and the main parameters of the fracturing process; S2: Inject acid into the reservoir at a high flow rate for acid pretreatment; S3: Switch to low-viscosity fracturing fluid injection and rapidly increase the flow rate; S4: Inversely design with different construction pressure windows as the core, adopt a three-stage pressure control, flow rate adjustment, and pressure stabilization sand addition mode to complete single-layer fracturing and sand addition; S5: Referring to the above steps, complete the fracturing and sand addition of the remaining layers in the single well. The advantages are: significantly increasing the fracturing fracture length of directional shale oil wells, improving the fracture network support effect and fracture network-controlled reserves, high test production after fracturing, long stable production time, and achieving high-efficiency development of directional wells in structurally complex areas.

The disclosure is in the technical field of oil drilling, and in particular relates to a directional well hydraulic clutch drill string full rotation controller, including a rotary assembly, a power assembly and a control assembly. It has two working states: compound drilling and directional drilling. According to the change of the tool face, adjusting the rotation speed of the upper drill string or the displacement of drilling fluid may change the working state of the controller and complete the directional drilling work. The directional well hydraulic clutch drill string full rotation controller has a low cost and high safety and reliability. When oriented, the drill string keeps rotating, which greatly reduces the friction of the drill string system, reduces the stick-slip vibration phenomenon of the drill bit, and thus increases the ROP. The research and development of this technology is of great significance to the petroleum industry.

The invention discloses a horizontal well fracturing process for a shale oil directional well. The method comprises the following steps that S1, according to geological and engineering data of the fault block type shale oil reservoir, in combination with crack parameters of a block early-stage fractured well, three-dimensional layering and clustering and fracturing process main body parameters of a directional well are determined; s2, injecting an acid solution into the reservoir in a large-displacement manner to perform acid pretreatment; s3, low-viscosity fracturing fluid injection is switched, and the displacement is rapidly increased; s4, according to reverse design, different construction pressure windows serve as the core, a three-section type pressure control and displacement adjusting pressure stabilizing sand adding mode is adopted, and single-layer fracturing sand adding is completed; and S5, according to the steps, fracturing sand adding of the remaining interval of the single well is completed. The method has the advantages that the fracturing transformation seam length of the shale oil directional well is greatly increased, the seam net supporting effect and the seam net seam control reserve of the directional well are improved, the testing yield after fracturing is high, the stable production time is long, and high-benefit development of the directional well in a complex structure area is achieved.

The invention discloses an ultra-low permeability reservoir development well type optimization method based on oil layer stacking modes. The method is specifically implemented according to the following steps that 1, the oil layer stacking modes are divided into a thick oil layer, a thin oil layer and a thin interbed according to ultra-low permeability reservoir sand body structure characteristics and reservoir physical property characteristics; 2, according to actual block reservoir parameters, oil reservoir mechanism models corresponding to three oil reservoir stacking modes of a thick oil reservoir, a thin interbed and a thin oil reservoir are established respectively; 3, a directional well, a highly-deviated well and a horizontal well are arranged in the thick oil layer oil reservoir mechanism model, the thin interbed oil reservoir mechanism model and the thin oil layer oil reservoir mechanism model respectively, and numerical simulation calculation is conducted through numerical simulation software; 4, well type optimization is conducted on the thick oil layer, the thin oil layer and the thin interbed according to calculation results of numerical simulation. The problems that in the prior art, the well type adaptability is poor, and the single well yield is low are solved.

The invention discloses a water-drive reservoir inter-well interference discrimination and optimization method based on joint well pattern deployment, which comprises the following steps: carrying out horizontal well substitution ratio conversion; direction, small layer and single well development indexes under the condition that the horizontal well is not deployed are calculated, and oil field development changes are simulated; establishing a deployment mode of the horizontal well in the original seepage area, and calculating direction, small layer and single well development indexes under the condition that the horizontal well is deployed outside the original seepage area; establishing a deployment mode of the horizontal well outside the original seepage area, and calculating direction, small layer and single well development indexes under the condition that the horizontal well is deployed outside the original seepage area; establishing a net interference value calculation method to reflect the interference condition on the well pattern of the original directional well after the horizontal well is deployed; and optimizing well position deployment according to the interference condition formed on the well pattern of the original directional well after the deployment of the simulated horizontal well. According to the method, a directional well and horizontal well combined mining interference mathematical model is established, the development dynamics of a single well, a small layer and the orientation are quantitatively represented in real time, and calculation of related indexes of the horizontal well deployed by a directional well network is achieved.

The invention belongs to the field of petroleum drilling, and provides a directional well kick margin calculation method, which considers the influence of a hole drift angle when establishing a kick margin calculation model, increases the factors for solving the kick margin, and can obtain a more accurate kick margin calculation result. Comprising the following steps: calculating the maximum allowable shut-in casing pressure; according to the maximum allowable shut-in casing pressure, the maximum allowable overflow invasion height is calculated; considering the influence of the hole drift angle, and calculating the actual section length of the maximum allowable overflow invasion height; according to the actual section length of the maximum allowable overflow invasion height, the overflow volume of fluid invading the shaft at the shaft bottom and the overflow volume of fluid invading the shaft at the casing shoe are calculated; a maximum allowable kick margin is determined based on the overflow volume at the bottom hole of the fluid invading the wellbore and the overflow volume at the casing shoe.

The invention belongs to the technical field of petroleum engineering and fluid force, and particularly relates to a supercritical CO2 in-crack dynamic visual sand-carrying flow simulation experiment device which comprises a supercritical CO2 source pretreatment unit, a fluid-carrying flow simulation experiment unit, a fluid-carrying flow simulation experiment unit, a fluid-carrying flow simulation experiment unit, a fluid-carrying flow simulation experiment unit, a fluid-carrying flow simulation experiment unit, a fluid-carrying flow simulation experiment unit and a fluid-carrying flow simulation experiment unit, the supercritical generation unit is used for converting liquid CO2 into supercritical CO2; the sand mixing unit realizes uniform mixing of supercritical CO2 and a proppant, and monitors the mixing state in real time through a thermometer and a pressure gauge; the well type track simulation unit controls a movable bottom plate to advance and change a motion track through a first driving part and a second driving part, dynamically adjusts the shape of a crack flow channel, and accurately simulates complex tracks of a horizontal well, a directional well, a curved well hole and the like; the flow control unit accurately adjusts the flow and pressure of the system; and the CO2 recovery unit realizes purification and cyclic utilization of CO2 through a desanding circulation system and a sand collection tank.

The present invention relates to the technical field of MWD instruments in oil drilling systems, and is an MWD safety key anti-slip device, comprising a circulation sleeve, a docking guide shoe, a guide shoe barrel, a retaining spring, an anti-puncture ring and a directional key. The present invention has a reasonable and compact structure, and the guide surface increases the inner diameter of the upper end of the circulation sleeve. When deployed, various steps and slight tilts and misalignments at the lower end of the guide shoe barrel of the MWD instrument will be guided into the circulation sleeve under the action of the docking guide shoe guide surface. By setting the retaining spring, when the guide shoe barrel is installed in the circulation sleeve, the upper end of the retaining spring and the directional groove can constrain the directional key, so that the directional key cannot fall out of the directional groove, thereby achieving the effect of preventing the key from falling out. The setting of the positioning card table can avoid the misalignment of the opening of the retaining spring and the directional groove after the retaining spring rotates in the card slot, so that the directional key cannot enter the directional groove, thereby meeting the safety requirements of the MWD instrument in high-angle directional wells, especially horizontal wells, expanding the scope of use of the instrument, and ensuring the increase in drilling speed and efficiency.

This invention relates to a method for designing geologically constrained wellbore trajectories in directional wells, belonging to the field of drilling engineering design technology. The specific steps are as follows: For complex multi-target formations, 3D seismic technology is used to accurately locate each target body in space, precisely interpreting the target formation and fault spatial distribution, and then establishing a 3D model of the target formation and faults. For multi-target directional wells with immovable wellheads, a multi-target five-segment trajectories design is adopted. Based on the target point locations, constrained wellbore trajectory data is calculated using the five-segment wellbore trajectory model. 3D seismic data is fused with the drilling targets, spatially positioning the targets on the 3D seismic data volume. Multiple targets to be drilled are then designed using a top-down, multi-target, five-segment wellbore trajectory system. This method effectively avoids the precisely identified fault spatial morphology in 3D seismic data, setting wellbore trajectories for each target body and avoiding the influence of faults.

The invention relates to a directional drilling method and device for dense cluster wells, electronic equipment and a storage medium. The directional drilling method for the dense cluster well comprises the steps that a trajectory profile of a well hole of a directional well is obtained; the minimum center distance between the directional well bore and the adjacent well bore is calculated according to the trajectory profile map and the trajectory map of the adjacent well bore adjacent to the directional well; according to the minimum center distance, the vector separation coefficient and the collision probability between the directional well hole and the adjacent well hole are determined; and according to the vector separation coefficient, the minimum center distance and the collision probability, whether drilling work is carried out is determined.

The present application relates to the field of oil and gas field development research, and provides a method for improving target radius in drilling, comprising the following steps: step 1, determining the main layer of the target block, and determining the production capacity of the main layer; step 2, determining the sweet spot distribution of the well site deployment area based on at least the production capacity of the main layer, and determining the main layer plane and the longitudinal distribution trend of the main layer of the well site deployment area; step 3, determining the well point position based on at least the main layer plane and the longitudinal distribution trend of the main layer of the well site deployment area, and determining the well pattern; step 4, determining the target area range based on at least the well pattern, designing the target point, and designing the target point with the depth of the main layer as the target area range; and step 5, determining the directional well trajectory. The present application takes the depth of the main layer as the design target point, and considers the regular well pattern, so that the directional error of the well trajectory can be effectively reduced, the target accuracy can be improved, the well trajectory can be optimized, the footage can be further reduced, the drilling cycle can be shortened, the field operation efficiency can be improved, and the investment can be saved.

The invention discloses a vertical well / directional well production pressure difference evaluation method suitable for casing perforation well completion. The method comprises the steps that firstly, the sum of formation pressure consumption, perforation pressure consumption and gravel pressure consumption is adopted as the theoretical production pressure difference; the difference value between the pump inlet pressure during pump stopping and the pump inlet pressure during production is used as the actual production pressure difference; and the permeability of the gravel layer in the perforation hole is repeatedly adjusted, so that the change rule and numerical value of the theoretical production pressure difference and the actual production pressure difference at the initial stage of production are consistent, the permeability of the gravel layer in the equivalent perforation hole is obtained, and finally the long-term production pressure difference of the production well is calculated by utilizing the permeability of the gravel layer in the effective perforation hole. According to the perforation parameters, the geological parameters and the actual production parameters of the vertical well and the directional well, the production pressure difference of the vertical well and the directional well in a casing perforation well completion mode is accurately evaluated, a mainstream theory multi-skin factor production pressure difference algorithm is simplified, the calculation process is simple, and the calculation result is more accurate.

The application discloses a kind of drilling directional well wellbore trajectory mapping equipment, comprising: frame body, four corners are provided with the roller assembly for facilitating its movement;Moving piece, slidingly disposed on the horizontal beam of the upper end of the frame body;Wellbore positioning member, slidingly connected to the moving piece by pulley assembly;Telescopic member, rotationally disposed at the lower end of the wellbore positioning member;Sand breaking member, connected to the telescopic member;And mapping member, disposed at the lower end of the sand breaking member.

The utility model relates to an inclined shaft type oil well pump, which belongs to the technical field of oil extraction equipment for oil fields and comprises a pump cylinder, a plunger is arranged in the pump cylinder, an elastic reset traveling valve is arranged at the upper end of the plunger, a mechanical forced reset traveling valve is arranged at the lower end of the plunger, and an upper oil outlet connector is arranged above the elastic reset traveling valve. The plunger pump is used in a highly-deviated well and a directional well and can be installed in the mode that a common tubing pump descends into the well, an oil pipe does not need to be pulled out when the plunger piston is replaced through regular pump inspection, the workload of pump inspection is greatly reduced, and the oil production efficiency is improved; and each valve pair eliminates the influence of well deviation on the resetting of the valve ball in two modes of elastic resetting and forced resetting, and can be normally used in a gas-containing highly-deviated well.

The invention relates to a directional drilling track profile map drawing method and device, electronic equipment and a storage medium, in particular to the field of geophysical exploration technology and coal mine water control, and the method comprises the steps that firstly, drilling monitoring data of an actual drilling track in an Ordovician aquifer are obtained based on a drilling orientation instrument, and a drilling orientation instrument is established based on the drilling monitoring data; directional well design analysis software is utilized to obtain drilling control parameters corresponding to any measuring point in the actual drilling track; determining a section line corresponding to the actual drilling track according to the drilling design starting point and the drilling design end point corresponding to the actual drilling track; determining the projection length of any measuring point on the section line in the actual drilling track by using a vector projection method; and finally, drawing a profile map corresponding to the actual drilling track based on the projection length of any measuring point on the profile line and the vertical depth of any measuring point. Profile projection analysis of the actual drilling track of directional drilling can be achieved, the drawing efficiency is effectively improved, and it is guaranteed that the actual drilling position is at the designed target layer.

The invention relates to the technical field of marine natural gas hydrate exploitation, in particular to an ultra-long gravity heat pipe assisted natural gas hydrate exploitation system and method. The horizontal mining well extends to the NGH reservoir and is used for collecting natural gas; the horizontal injection well extends to the NGH reservoir and is used for injecting CO2; the directional well penetrates through the NGH reservoir and extends to the geothermal reservoir, and the section, located in the NGH reservoir, of the directional well is obliquely arranged; according to the flexible gravity assisted heat pipe, a heat-pressure-replacement three-in-one mining system is formed through the mining mode that heat exchange of the flexible gravity assisted heat pipe is combined with horizontal well pressure reduction and CO2 replacement, and the problems of reservoir cooling and secondary hydrate generation of a pressure reduction method, heat loss and interlayer pollution of a traditional heat injection method and slow dynamics and icing risks of a CO2 replacement method are solved in a targeted mode.

The invention relates to the technical field of well drilling, in particular to an oscillation and impact composite downhole power tool which comprises an oscillation assembly, a power assembly, an output spindle and an impact assembly, the power assembly comprises a stator and a rotor, and the rotor capable of rotating through fluid or gas is installed in the stator. According to the invention, the structure is reasonable and compact, the oscillation assembly is arranged and can form pulse oscillation fluid on the upper part of the power assembly, so that a drill column is driven to creep downwards at high frequency and low amplitude, and when the rotor rotates, the impact assembly can enable the output main shaft to rotate along with the rotor and enable the output main shaft to reciprocate along the axial direction; in this way, impact force generated when the output main shaft reciprocates in the axial direction can be transmitted to a drill bit installed at the lower end of the output main shaft, and rock breaking efficiency is improved. Under the combined action of oscillation and impact, the problems of low deflecting rate, low drilling efficiency and low drilling speed of large-size borehole deflecting sections of directional wells and horizontal wells can be effectively solved, and the aims of increasing the speed and improving the efficiency are achieved.

The invention discloses a rotary guiding short section and a well drilling control method, and solves the technical problems that an existing rotary guiding system is single in function, and vertical well drilling and vertical well deflecting need multiple times of drilling. The rotary guiding short section comprises a short section main body used for being connected with drilling equipment; the pushing assembly is arranged on the nipple main body and is used for controlling the drilling direction; the acceleration sensing and measuring assembly is arranged on the nipple main body and is used for measuring well deviation and a gravity tool surface of the drilling equipment; the fluxgate sensing measurement assembly is arranged on the nipple main body and is used for measuring well deviation and a magnetic tool surface of drilling equipment; and the transmission control assembly is arranged on the nipple main body. According to the drilling equipment, the functions of vertical drilling, vertical well deflecting and directional drilling can be achieved at the same time, function switching can be conducted automatically, the functions of vertical drilling, vertical well deflecting and one-time drilling of a three-dimensional directional well are achieved, the number of times of tripping of the drilling equipment is reduced, and therefore the drilling time efficiency is improved.

An ultrahigh-temperature multi-pipe real-time regulation and control layered and segmented injection-production and long-acting monitoring device is characterized in that a heat insulation oil pipe is arranged at the lower end of a large oil pipe hanger, and a high-temperature production packer is arranged on the heat insulation oil pipe; the heat insulation oil pipe is sequentially connected with the high-temperature jet pump outer working barrel, the high-temperature deep well safety valve, the oil pipe inside and outside penetrating short section, the open type telescopic short section and the steam injection and liquid production channel switching valve, and the steam injection and liquid production channel switching valve is concentrically connected with the first-stage independent injection and liquid production pipe column, the second-stage independent injection and liquid production pipe column and the inserted sealing inner working pipe column. The method has the beneficial effects that an ultrahigh-temperature multi-pipe injection and production switching mode is combined with a high-temperature injection and production integrated process, and the method is not limited to combination of injection and production processes such as high-temperature jet pump injection and production integration, high-temperature Y-pipe electric pump injection and production integration and high-temperature casting and fishing electric pump / screw pump injection and production integration; fine regulation, control, steam injection and liquid production and long-acting monitoring of a large-well-spacing long-well-section horizontal well and a multi-layer high-inclination directional well can be achieved, and the injection and production effect and efficient development of heavy oil thermal production are guaranteed.