35results about How to "Improve rock-carrying ability" patented technology

The invention belongs to the technical field of petrochemical industry and relates to a preparation method of high-property organic bentonite for an oil-based drilling liquid. The preparation method comprises the following steps: dissolving 50-70 parts of sodium-based bentonite dry material in 600-900 parts of deionized water so as to form a suspension system a; mixing and dissolving 15-30 parts of quaternary ammonium salt organic modifier in 100-300 parts of solvent so as to form a homogenous system b; dissolving 10-15 parts of intercalation agent in 100-150 parts of solvent so as to form a homogenous system c; adding a solution b in the suspension system a, and reacting for 1-2 hours at the temperature of 70-90 DGE C so as to form a homogenous system d; adding a solution c in the suspension system d, and reacting for 1-2 hours at the temperature of 70-90 DGE C; and cooling a product to room temperature, washing off redundant ions in the product, filtering, and finally, drying a solid product in the vacuum environment at the temperature of 60-80 DEG C, smashing and screening so as to obtain the product high-property organic bentonite. By using the method provided by the invention, the property of the organic bentonite can be greatly improved, and the high-quality organic bentonite is prepared, thereby being beneficial to improvement of rheological behavior and debris carryingcapability of a drilling liquid.

The invention discloses a hydroscillator which is used in petroleum drilling and other fields and has a cuttings discharging function. According to the technical scheme, an upper connector, a stator casing, a universal shaft casing, a bearing supporting sub and a lower connector are sequentially in threaded connection; a power assembly comprises the upper connector, a rotor compressing cap, a screw rotor, a rubber stator and the stator casing; the screw rotor, a universal shaft and a transmission shaft are sequentially in threaded connection; a valve assembly comprises a flow passing transmission shaft, a cam system, a spray nozzle, a spring system and the lower connector, the flow passing transmission shaft and a cam bushing are in threaded connection, a cam is fixed on the cam bushing through screws, and a valve element is matched with the lower connector through a key groove; the cam system converts rotation motion of a screw motor into axial motion of the valve element, and opening and closing of a valve are realized. With the adoption of the hydroscillator, friction resistance between a drilling tool at the lower part of a horizontal well or a large-displacement well and the well wall can be reduced effectively, the cuttings bringing capacity of a drilling fluid can be improved, the drilling efficiency is improved, and downhole accidents such as sticking can be avoided.

The invention discloses an oscillator which is used in the field of petroleum drilling and is capable of promoting cutting bringing of drilling fluid. According to the technical scheme, an upper connector, an impeller shell, a bearing shell, a nozzle shell and a lower connector are in threaded connection in sequence; an impeller and an impeller mandrel are positioned through a flat key and a locking cap; the impeller mandrel, a water cap and a valve core tube are in threaded connection in sequence; torque generated by the impeller impacted by drilling fluid is conducted to the valve core tube through the impeller mandrel and the water cap, and then the valve core tube is driven to rotate. A radial through hole is formed in the nozzle shell, fluid inside the tube is communicated and cut off from the outside when the valve core tube is rotated, pressure fluctuation of the fluid inside a tube column is achieved through internal and external pressure differences of the tube column, and a drilling column is vibrated. By adopting the oscillator, the friction resistance of a drill rig at the lower part of a horizontal well or a large displacement well to a well wall is effectively reduced, the cutting carrying property of the drilling fluid is improved, the drilling efficiency is improved, and under-well accidents such as drilling blocking can be avoided.

The invention provides water-in-oil drilling fluid and a preparation method thereof. The drilling fluid comprises an oil phase, a water phase and an additive; the additive comprises high-softening point asphalt composition particles, a promoter, and an emulsifier. Addition of the high-softening point asphalt composition particles is 1-5% of the total mass of the drilling fluid. Average particle size of the high-softening point asphalt composition particles is less than 60 mesh. The drilling fluid solves the problems of plugging and bad leak-off reduction effect, because good particle state and high temperature deformation capability cannot be kept due to extra high oil solubility, when the high-softening point asphalt is applied to oil base drilling fluid. At the same time, when the water content in the water-in-oil drilling fluid is high, the problems that heat stability and electrical stability become bad are solved by means of synergistic effects of the appropriate main emulsifier, the auxiliary emulsifier and the high-softening point asphalt composition particles; the drilling fluid can be widely applied to the deep oil gas drilling operation process.

The invention provides a nano microemulsion, and a preparation method and an application thereof. The preparation method comprises the following steps: 1) mixing 20-40 parts by weight of a mixed monomer, 0.01-0.2 part by weight of a protective agent and 15-30 parts by weight of water, adding 0.05-0.5 part by weight of modified silicate with the interlamellar spacing of 2-4 nm, and thus obtaining a first mixed solution, wherein the mixed monomer at least comprises acrylamide, sodium allysulfonate and sodium styrenesulfonate; 2) adding 10-25 parts by weight of a surfactant to 15-50 parts by weight of a solvent, to obtain a second mixed solution; and 3) adding 8-12 parts by weight of the first mixed solution to 15-25 parts by weight of a second mixed solution, to obtain a microemulsion; and adding 0.4-2 parts by weight of an initiator aqueous solution to 40-200 parts by weight of the microemulsion, carrying out an oscillating reaction at the temperature of 40-70 DEG C, and thus obtaining the nano microemulsion. The nano microemulsion has a good effect on reducing filtration loss under high-temperature and high-salt conditions.

The invention belongs to the technical field of petroleum chemical industry, and relates to a preparation method of high-performance organic bentonite for an oil-based drilling fluid. The preparation method comprises the steps: dissolving 55-75 parts of a sodium-based bentonite dry material in 600-900 parts of deionized water, to form a suspension system a; mixing and dissolving 15-35 parts of a quaternary ammonium organic modifier in 100-300 parts of a solvent, to form a uniform system b; dissolving 10-15 parts of an organic auxiliary agent in 100-150 parts of a solvent, to form a uniform system c; adding the system b to the suspension system a, carrying out a reaction for 1-2 h at the temperature of 70-90 DEG C, to form a uniform system d; adding the system c to the suspension system d, and carrying out a reaction for 1-2 h at the temperature of 70-90 DEG C; and cooling the product to room temperature, washing off excess ions in the product, filtering, finally, drying the solid product in a 60-80 DEG C vacuum environment, and crushing and sieving to obtain the product. The performance of the organic bentonite can be greatly improved, and the good-quality organic bentonite for the oil-based drilling fluid is obtained and is favorable for improving the rheological property, the filtration loss resistant performance and the cuttings carrying capacity of the drilling fluid.

The invention discloses a highly-deviated well oil base drilling fluid borehole cleaning control method. The highly-deviated well oil base drilling fluid borehole cleaning control method includes thefollowing steps: S1, on the basis of well history data of a drilled well and relevant data of a new well, the new well is analyzed through drilling analysis software; S2, at a certain drilling parameter, the change situations of the thicknesses of a cuttings bed and the equivalent circulating density of drilling fluid under different drilling fluid performance are analyzed in a simulated mode; S3,data are monitored in real time in the drilling process, and the recorded data comprise, but not limited to, the hook load, the cuttings recovery ratio, the torque, the pump pressure, up-lifting anddown-lowering data, and ECD actual measured values; and S4, the borehole cleaning state is judged based on the actual monitored values of the S3, so that under the premise of maintaining the high blocking property of the drilling fluid and under the condition of meeting the capability of drilling equipment, the rheological property of the drilling fluid is adjusted until the actual values monitored in the S3 conform to the state of the cleaning standard. The area range where the annulus drilling fluid is located in a turbulent state is enlarged, the surge pressure and the equivalent circulating density of the drilling fluid are decreased, the mechanical drilling speed is released, and the operation efficiency is improved.

The invention relates to a cleaning fiber and a method for using the cleaning fiber for cleaning a well and belongs to the technical field of cleaning a wellhole of a petroleum drilled well. The cleaning fiber is made of raw single fiber polypropylene, in the shape of a long thread and has the length ranging from 12mm to 13mm and the diameter of 21micrometers. The cleaning fiber is made of the raw single fiber polypropylene and has the features of being resistant to heat, high in strength and dispersion, sluggish and the like. The cleaning fiber is made into short fibers which are 12mm to 13mm long and have the diameter of 21micrometers. The short fibers are added into drilling liquid and do not change the property of the drilling liquid. The cleaning fibers in the blended fiber cleaning thick liquid can improve the cutting-carrying capacity of the drilling liquid in a multiplied mode and the well cleaning efficiency is greatly higher than that of regular pure drilling liquid for cleaning.

The invention relates to a vortex cleaning drill pipe. The drill pipe comprises a drill pipe body (1), wherein a vortex generator (2) is arranged on the surface of the drill pipe body and can generate lots of vortexes with different sizes, quantities and ranges in an annular space around the drill pipe, so that the cuttings in annular space, which are deposited at the low side of a borehole, are taken to the center of the annular space and finally taken away by gas in the annular space. Therefore, the possibility of formation of a cuttings bed on the horizontal segment of a horizontal well is effectively reduced.

The invention discloses a nano plugging agent for plugging an oil-gas well and a preparation method thereof. The nano plugging agent comprises the following components in parts by weight: 50-90 partsof water, 8-10 parts of sodium carbonate, 8-9 parts of a cementing material, 4-6 parts of a calcium chloride water solution, 11-15 parts of an emulsifier, 3-6 parts of a composite plugging agent, 2-5parts of a blender, 1-2 parts of methyl methacrylate, 1-2 parts of a surfactant and 2-3 parts of a pH regulator. The constant temperature is preferably 25 DEG C. The beneficial effects of the nano plugging agent are that: according to the preparation method of the nano plugging agent, the prepared base slurry interacts with various reagents, finally an emulsifier and a surfactant are added and mixed to obtain the nano plugging agent, the plugging capacity and the rock carrying capacity of the nano plugging agent are enhanced, and the nano plugging agent has the characteristics of safety, environmental protection and hydrocarbon reservoir protection, can be used for multiple times, has no side effect, and can well meet the market requirements at home and abroad.

The invention provides a well cleaning functional type drill pipe. A pipe body is connected with an internal threaded joint and an external threaded joint in a welded mode, and welding seams are formed at the welding position of the pipe body and the internal threaded joint as well as the external threaded joint; a thickening section is arranged in the middle position of the pipe body, conical segments are machined at the two ends where the thickening section intersects with the pipe body, and the middle of the thickening section is a cylindrical segment; and an internal thread and an externalthread which are mutually cooperated are machined on the internal threaded joint and the external threaded joint correspondingly. The well cleaning functional type drill pipe has the advantages thatdrilling fluid is automatically disturbed by the drill pipe, so that the flow regime of the drilling fluid is changed, and the cuttings carrying ability of the drilling fluid is improved; due to disturbance of the drill pipe, cuttings deposited at the bottom of a well is disturbed, the drilling fluid entering into the turbulent flow state is brought out of the well, and the well cleaning effect isachieved; and the problems of sand setting, friction, backing pressure and the like of a drill column in the drilling process are effectively solved, and short tripping of the drill column, mud circulation well-washing operation time and risks of downhole complex accidents are reduced.

The invention relates to a streamline PDC drill bit for improving rock carrying capability and a design method of the streamline PDC drill bit. Five novel streamline blades are arranged on a streamline PDC drill bit body, and a flow channel between tails of every two adjacent blades is provided with an asymmetric twisted splitter blade. The design method of the streamline PDC drill bit capable of improving the rock carrying capability comprises two major parts including a design method of a novel streamline blade and a design method of an asymmetric twisted splitter blade. Compared with a traditional PDC drill bit, the streamline PDC drill bit provided by the invention has the advantages that the flow channel between every two adjacent blades is additionally provided with the splitter blade, and in addition, the blades adopt the novel streamline design, so that the flow speed of annular fluid is accelerated, and the rock carrying efficiency of the drill bit can be improved, the generation of mud drums is avoided, and the drilling efficiency is improved.