57results about How to "Prevent sediment clogging" patented technology

The invention discloses a particle drilling method, and belongs to the technical field of oil gas drilling engineering. The particle drilling method comprises steps of particle injection and particle recovery. The particle drilling method is characterized in that a. a slurry and particles are injected in a well through an injection device in the step of particle injection; b. a mixture of particles, rock debris and the slurry returned from the well is drained into a magnet separator after passing pipes from a rotary control head on a derrick floor in the step of particle recovery, and the magnet separator sends separated particles into a storage tank, and sends separated rock debris and slurry into a slurry tank; and c. particles in the storage tank are injected into the well again to drill through the injection device, to form a drilling cycle. According to the particle drilling method, the mixture of particles, rock debris and the slurry returned from the well is directly drained into a magnet separator through an exit device at the well head, particles can be separated and stored, a problem in the prior art that a slurry may leak from a plurality of positions because rock debris and the slurry are directly pumped into a drilling crew vibrating screen can be solved, and the risk of environmental pollution can be greatly reduced.

The invention relates to a fast bed reaction method for ultrafine particles and a fast reaction bed, comprising a cyclone separator, the bottom outlet of the cyclone separator is separated from the cyclone through a downcomer, a delivery pipe, a riser pipe and a connecting pipe The top inlet of the downcomer is connected; the material is put into the delivery pipe through the downcomer from the feed inlet of the upper part of the downcomer, and then enters the riser after being heated in the delivery pipe, together with the reaction gas introduced from the air inlet of the lower part of the uptake Rising, continuous mixing, and reaction, the gas-solid mixture goes out of the riser and is sent to the cyclone separator through the connecting pipe. After the gas-solid separation of the cyclone separator, the solid powder enters the conveying pipe again to carry out the above cycle process for many times. After the reaction The material is discharged from the discharge port at the end of the conveying pipe. The invention has simple structure, easy control, simple method, separation of heating and reaction process, good fluidization stability, effective reduction of superfine particle agglomeration and clogging, good reaction uniformity, high efficiency and continuous production.

The invention provides a sorting and grading device of a pulsating liquid-solid fluidized bed and a method thereof. The sorting and grading device comprises a light product overflow trough, a central feed pipe, a sorting tank, a pulsating liquid distributor, a pulsating current generator, a heavy product collecting base-cone section, a sensor for measuring the concentration of the heavy product layer, a programmable controller, a heavy product discharging fluidized chamber and an underflow discharging automatic control actuator. The method comprises the following steps: firstly, water is thrown into a sorting machine in a pulsating way by the pulsating current generator, to form an upward varying-accelerated pulsating-type ascending current; accordingly, low-density or fine-fraction materials can be subjected to upward accelerated movement under the action of the accelerated pulsating-type ascending current, thus achieving the overflow discharge of the low-density or fine-fraction materials as the light or fine-fraction products; and high-density or coarse-fraction materials can be settled downwards in the fluidized bed, thus achieving the discharge of the high-density or coarse-fraction materials as the heavy or coarse-fraction products. Accordingly, the process for sorting materials by density on the basis of pulsating fluidization or the process for grading materials by fraction on the basis of pulsating fluidization can be achieved. The device and method of the invention have the advantages of simple operation, low energy consumption, low sorting lower limit, wide fraction range, high sorting accuracy and high reliability.