13results about How to "Increase ROP" patented technology

The present application provides a kind of formation threshold WOB and threshold torque determination method and device, belong to drilling engineering technical field, the method includes: obtaining different preset top drive speed under, in the preset WOB interval, the mechanical drilling speed, torque value and drill bit vibration parameters corresponding to different WOB value;For each preset top drive speed: based on the WOB value of the preset top drive speed and the mechanical drilling speed corresponding to the WOB value, determine the initial threshold WOB of the preset top drive speed from the WOB value;Based on the initial threshold WOB of the preset top drive speed, the torque value corresponding to the preset top drive speed is determined as the initial threshold torque of the preset top drive speed;Based on the drill bit vibration parameters corresponding to initial threshold WOB, initial threshold WOB and initial threshold torque are corrected, and formation threshold WOB and formation threshold torque are obtained.The present application has the advantages of simple calculation method, more accurate result, can effectively guide the selection of drill bit and screw rod, improve the mechanical drilling speed, and improve the rock breaking efficiency.

The utility model relates to a micro spraying tooth and a drill bit, the micro spraying tooth comprises a hard alloy matrix and a diamond composite layer, the diamond composite layer is arranged at one end of the hard alloy matrix, and at least one pointed cutting face is formed at the end of the diamond composite layer. The diamond composite layer is arranged at one end of the hard alloy matrix, the pointed cutting face is formed at the end of the diamond composite layer, the pointed cutting edge formed by the pointed cutting face can reduce the area of the cutting contact face between the micro spraying tooth and rock, the contact stress between the micro spraying tooth and the rock is improved, and therefore the micro spraying tooth can be used for cutting the rock. Therefore, the cutting efficiency of the micro spraying teeth and the mechanical drilling speed of the drill bit provided with the micro spraying teeth are improved, and the technical problem that the mechanical drilling speed of a drill bit for deep well operation is low in the prior art is solved.

The invention discloses a rock breaking drilling tool for oil exploitation, and particularly relates to the technical field of oil exploitation, the drilling tool comprises a drill rod assembly, a drill bit assembly is arranged at the bottom end of the drill rod assembly, and a drilling fluid inlet is formed in the middle of the top of the drill rod assembly; a self-resetting impact piston is slidably connected into the drill rod assembly, the drill bit assembly is installed at the bottom end of the self-resetting impact piston, and a third axial hole is formed in the self-resetting impact piston. A self-resetting impact piston is connected into the drill rod assembly in a sliding mode, and a second axial hole is formed in the self-resetting impact piston. A pressure distribution assembly is installed in the drill rod assembly, a plunger is installed at the bottom of the pressure distribution assembly, and a pressure cavity is defined by the self-resetting impact piston, the drill rod assembly and the pressure distribution assembly. The drill bit assembly is internally provided with a first axial hole, a flow-out hole, a drilling fluid inlet, the pressure distribution assembly, the second axial hole, the third axial hole, the first axial hole and the flow-out hole which are sequentially communicated. Through cooperation of double-piston series connection impact and periodic liquid flow control, composite rock breaking of hydraulic impact and rotation is achieved.

This invention provides a method for calculating and determining the lifespan of impregnated diamond drill bits, belonging to the technical field of impregnated diamond drill bits in geological drilling. Based on engineering practice parameters, it establishes a calculation model relating the lifespan of impregnated diamond drill bits to drill bit parameters, encountered lithology, and drilling parameters. By optimizing and calculating these parameters, it can improve drill bit lifespan, increase mechanical drilling speed, and prevent a significant reduction in drill bit lifespan. The method can calculate and determine the following technical problems: It obtains parameters relating drill bit lifespan to footage per revolution and drill pressure per unit area, and establishes a calculation model relating drill bit lifespan to matrix abrasion per revolution, rock abrasiveness coefficient of the drill bit matrix, rock friction coefficient, footage per revolution, and drill pressure per unit area. It can calculate and determine the rock abrasiveness coefficient of the drill bit matrix; calculate and determine the matrix abrasion per revolution corresponding to different drill pressures per unit area; and calculate and determine the drill bit lifespan corresponding to different drill pressures per unit area.

The application discloses a multi-directional impact drilling tool, which comprises a shell body, a rotary impact structure arranged in the shell body, a support structure arranged between the rotary impact structure and a drill bit seat, the support structure comprising a spiral support and a wedge-shaped support, a first wedge-shaped block arranged at the bottom end of the spiral support, and the circumferential two side walls of the first wedge-shaped block being a first wedge-shaped support surface and a second wedge-shaped support surface respectively; a second wedge-shaped block arranged at the top end of the wedge-shaped support, and the circumferential two side walls of the second wedge-shaped block being a third wedge-shaped support surface and a fourth wedge-shaped support surface respectively; the spiral support can rotate with the throttle support body to make the first wedge-shaped support surface abut against the third wedge-shaped support surface, and the spiral support can rotate with the throttle support body to make the second wedge-shaped support surface abut against the fourth wedge-shaped support surface. The application can generate a positive torsional impact and a downward axial impact, realizes the crushing of rocks at the front end and the lower end of a drill bit, increases the utilization of reverse torsional impact load, and significantly improves the rock breaking efficiency of the drill bit.

The utility model discloses a novel concave ridge type cutting element easy to remove cobalt, which comprises a hard alloy matrix and a diamond composite layer, at least one convex ridge extending from the radial edge to the center of a cylinder is arranged on the end face of the diamond composite layer, and a cutting edge is formed at the highest position of the convex ridge; the thinnest part of the diamond composite layer is a plane, an inclined plane or a curved surface, and the thickness of the thinnest part of the diamond composite layer is greater than or equal to 0.8 mm. The diamond compact has the advantages that aggressiveness is high, deep cobalt removal is easier, a stratum is cut through the concave ridge-shaped face, the cutting face has a high ploughing function, the crushing drilling performance of the compact is improved, drilling cutting resistance is reduced, and then the mechanical drilling speed of a diamond drill bit is increased.

The application relates to the technical field of oil and gas drilling engineering, and discloses an intelligent self-adaptive bidirectional drill string shock absorber based on a magneto-rheological fluid, which comprises a driving outer cylinder, a torsional spline sleeve is threadedly connected in the driving outer cylinder, a spline mandrel is arranged on one side of the driving outer cylinder, and the bottom end of the spline mandrel is connected with the torsional spline sleeve through splines; a torsional shock absorbing unit is arranged in the driving outer cylinder and in contact with the torsional spline sleeve; an axial shock absorbing unit is connected with one end of the torsional shock absorbing unit away from the torsional spline sleeve through a limiting sleeve and an impact joint; an intelligent sensing and control unit is arranged at the bottom of the axial shock absorbing unit, and the intelligent sensing and control unit is electrically connected with the axial shock absorbing unit. Through the bidirectional structure of "mechanical passive torsional shock absorbing-mechanical-active magneto-rheological fluid pressure composite axial shock absorbing", the bidirectional drill string torsional and axial vibration is comprehensively and efficiently inhibited.

The invention relates to an oil exploration well drilling operation technology in the field of geological exploration drilling tools, in particular to an oil and gas well screw drilling tool combination acceleration method. According to the method, a drilling tool comprises a screw rod, and the screw rod comprises a bypass valve assembly, a motor assembly, a universal shaft assembly and a transmission shaft assembly which are sequentially connected from top to bottom in a conventional mode; the whole screw rod is a single-bend screw rod with the bending degree of 1-2.25 degrees, the bending point is arranged on the outer cylinder wall of the universal shaft assembly, and the distance between the bending point and the end face of the transmission shaft assembly is 900-960 mm; and the transmission shaft assembly is sequentially connected with the conventional torsion impacter and the PDC drill bit. On the basis of application of the torsional punching and PDC drill bit, a low-bending-point equal-wall-thickness screw drill is additionally arranged in a drill assembly, and the aim of improving the mechanical drilling speed is achieved.

This invention discloses a composite impact-driven drilling tool, belonging to the field of oil and gas drilling technology. Addressing the problems of poor tool adaptability and asynchronous impact and reversing in existing technologies, this invention proposes a quantitative design method based on the fluid-structure interaction coefficient. The tool's actuating valve assembly includes a coaxially nested inner sleeve and a reversing valve, controlling fluid flow direction through a distribution structure. This invention defines the coupling coefficient between the geometric parameters of the reversing valve and the hydrodynamic parameters. This coefficient is jointly determined by the circumferential impact torque, reversing rotation angle, drilling fluid discharge rate, nozzle pressure drop, and the equivalent hydraulic diameter of the reversing valve, and is controlled within a specific preset range. Through the above quantitative design, the inverse relationship between the reversing angle and the discharge rate is forcibly constrained, achieving efficient synchronization of impact and reversing across the entire discharge range, effectively solving the problems of "idling" or "jamming," and significantly improving rock-breaking efficiency.

The invention provides a myriameter deep ground oil-gas lubrication resistance-reducing water-based drilling fluid as well as a preparation method and application thereof, and belongs to the technical field of drilling fluids. The oil-gas lubrication resistance-reducing type water-based drilling fluid for the 10000-meter deep ground comprises the following raw materials in parts by weight: 100 parts of water, 5-10 parts of light diesel oil, 1-4 parts of high-temperature-resistant clay, 3-6 parts of a dendritic macromolecular filtrate reducer, 2-4 parts of a temperature response micelle shear strength improving agent, 2-4 parts of a high-temperature-resistant strong-adsorption blocking agent, 3-5 parts of a nano composite polymer brush lubricant and 1-3 parts of a high-temperature-resistant system stabilizer. According to the invention, the filtrate reducer, the shear strength improving agent, the plugging agent, the lubricant and other components cooperate with each other to achieve synergistic interaction, so that the drilling fluid has low viscosity and good lubricating property and sedimentation stability under the conditions of 240 DEG C, saturated salt and high density, and can increase the mechanical drilling speed, slow down the wear of a drill bit, reduce drilling accidents such as differential pressure jamming and the like; and the drilling time and the total cost of a myriameter-deep oil-gas well are reduced.

The utility model belongs to the technical field of well drilling, and particularly relates to a double-layer fast-pushing vertical well drilling tool which comprises an outer shell, a main shaft is rotationally connected to the interior of the outer shell, and a guide hole drill bit is installed at the bottom of the main shaft. The main shaft is driven by drilling driving equipment to rotate, so that the guide hole drill bit drills a section of small-diameter guide hole and destroys a stress field of a stratum to be drilled, and meanwhile, the main shaft drives the reaming drill bit outside the rotating sleeve to rotate through transmission matching of the transmission assembly, so that the stress of the stratum to be drilled by the reaming drill bit is effectively released; the mechanical drilling speed is increased, the service life of the drill bit is prolonged, the drilling cost is reduced, the driving force of the transmission assembly and the driving force of the single drilling driving equipment are transmitted to the reaming drill bit and the guide drill bit respectively, and the cost is relatively saved.

The utility model belongs to the technical field of screw drilling tools, and particularly relates to a high-speed transmission shaft assembly which comprises a transmission shaft, a transmission shaft sleeve and a transmission shaft sleeve. The upper TC bearing static sleeve is in interference fit with the transmission shaft; the lower TC bearing static sleeve is in clearance fit with the transmission shaft; the sealing oil injection device comprises a sealing piston located at the upper end of the transmission shaft and a U-shaped sealing ring; the V-shaped sealing ring, the spring and the pressurizing ring are positioned at the lower end of the transmission shaft; lubricating agents are injected into the transmission shaft assembly. According to the utility model, the reliability and the service life of the screw drill are obviously improved and prolonged through structural innovation. Firstly, a traditional upper TC bearing movable sleeve is omitted, a wear-resistant alloy layer is overlaid on the surface of the transmission shaft, the number of kinematic pairs is reduced, the failure problem caused by abrasion of the movable sleeve is avoided, and meanwhile the manufacturing cost is reduced.

The invention relates to the technical field of roller bits, in particular to a two-stage reducing drill bit which comprises a drill bit body, a connector, blades, a first-stage water hole, main cutting teeth, auxiliary cutting teeth, a first-stage drill bit body, a second-stage drill bit body and a second-stage water hole. A first-stage water hole and a second-stage water hole are formed in the drill bit body, the first-stage water hole and the second-stage water hole are communicated with a water channel in the middle of the interior of the drill bit body, and fixed nozzles or replaceable nozzles are installed on the first-stage water hole and the second-stage water hole close to the top of the first-stage drill bit body and the bottom of the drill bit body. The nozzle of the first-stage drill bit body faces the bottom of the drill bit body, and the nozzle of the second-stage drill bit body faces the side portion of the drill bit body. Each blade wing comprises a main tooth clad sheet and an auxiliary tooth clad sheet. Compared with a single-stage drill bit, the drill bit is provided with more main cutting teeth, so that the service life of the drill bit is longer, and the drilling footage of the drill bit is 2-3 times that of the single-stage drill bit.