3results about How to "Reduced forward resistance" patented technology

The application relates to a directional drilling structure for a navigable river and an application method thereof, and relates to the drilling technology field; the directional drilling structure for the navigable river comprises a drill bit body, an agitating frame is rotationally connected to the end of the drill bit body, a control element is arranged on the drill bit body, and the control element is used for driving the agitating frame to rotate; the application has the effect of reducing the possibility of yaw in the drilling process of the drilling equipment.

The application discloses a gas well wellbore liquid fall-preventing throttling tool, which comprises a fishing head, a liquid fall-preventing throttling body, a sleeve, a liquid inlet cylinder, a connecting cylinder, a setting spring, a clamping sleeve, a sealing ring, a throttling channel, a liquid fall-preventing spiral flow channel, a setting clamp and a setting chamber. The device divides the inflowing gas-liquid fluid into two parts by the liquid fall-preventing throttling body, throttles, accelerates and depressurizes most of the fluid in the throttling channel, effectively prevents the liquid from falling back, and makes the other part of the fluid spiral upward along the liquid fall-preventing spiral flow channel. The asymmetric "narrowing-expanding" structure of the flow channel makes the forward resistance of the liquid smaller than the backward resistance, so that the liquid is less likely to fall back. The device is suitable for the water-gas well with insufficient gas liquid-carrying capacity, liquid fall or liquid accumulation in the wellbore, and can realize throttling, acceleration, pressure reduction, liquid fall prevention and improvement of the gas liquid-carrying capacity.

The utility model discloses an efficient vibration well cementation tool, and particularly relates to the technical field of casing pipe well cementation engineering under oil and gas wells, the efficient vibration well cementation tool comprises a guide head, a shell, a supporting ring and a center rod, the supporting ring and the center rod are arranged in the shell, the supporting ring is fixed on the middle upper portion in the shell, and a liquid inlet hole is formed in the supporting ring. A plurality of sets of impellers distributed in the circumferential direction of the supporting ring at equal intervals are arranged below the liquid inlet hole, the impellers are connected with a transmission gear through a transmission shaft, the center rod is connected with a reversing gear matched with the transmission gear, the center rod is fixedly connected with the guide head, and the center rod is connected with a balance weight eccentric block so that the center rod can drive the guide head to generate vibration. The impeller rotates to provide a rotating power source for the center rod, and the counterweight eccentric block is matched with the center rod to rotate to drive the guide head to vibrate, so that clogging or coal briquettes and the like in a well are crushed or guided through high-frequency vibration, the clogging problem is solved, and the friction resistance and buckling problems are avoided; and stable and rapid running of the casing pipe is realized.