Particle drilling method

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling engineering, in particular to a particle drilling method. Background technique [0002] The conventional drilling method is to use the drilling pressure and rotation of the drill bit at the bottom of the hole to mechanically break the rock to achieve the purpose of drilling. In this way, when encountering deep hard formations and strong abrasive formations, only the mechanical action of the drill bit is used to break the rocks. The function of the mud is only to carry cuttings, and it cannot achieve the combined rock breaking effect of hydraulic and mechanical, which has the problems of slow drilling speed, long cycle time and high cost. In recent years, particle impact drilling technology has been widely used as a revolutionary speed-increasing technology; particle impact drilling is a method of injecting spherical steel particles with a diameter of 1-3 mm into the bottom of the well...

AI Technical Summary

Problems solved by technology

[0009] In the drilling method disclosed in this patent document, in order to improve particle injection efficiency, two sets of injection devices that can work independently are used, but the method involves a large number of equipment, complex structure, inconvenient installation, and difficult operation; The particles in the screw propeller are easy to agglomerate and block the screw propeller, which makes it impossible to realize the normal injection of particles; the weight and volume of the injection device used are large, resulting in a large pressure per unit area of ​​the ground, and the foundation needs to be strengthened by cement curing, which consumes It takes a long time, high cost, and inconvenient transportation, and the coverage of the high-pressure area of ​​the device is large, and the safety risk is high; the two injection devices are independent and cannot be organically connected together, which increases the difficulty of cooperation with the particle separation system and particle delivery system. limits the drilling efficiency of particles

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