7results 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 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 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.

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 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.