Hydraulic high-pressure particle jet plug drilling test device

Abstract

The invention belongs to the field of petroleum drilling and production. The invention particularly relates to a hydraulic high-pressure particle jet plug drilling test device. The device comprises aconveyor, a cementing truck, a high-pressure pipe, a skid-mounted frame, a sliding sleeve, a movable cross beam, a vertical rail, a sliding sealing assembly, a return pipeline, a balancing weight, anupper glass cylinder, an oil pipe, a spray head, a nozzle, a lower glass cylinder, a hinge, a recovery tank and the like, the special particle jet drilling and plugging test device is used, the groundfull-size simulation of the underground particle jet drilling and plugging process is realized; by means of visualization of particle jet flow jet drilling and annulus upward returning, lowering andlifting of a spray head can be effectively controlled, due to adjustable bit pressure in the drilling process and reliable dynamic sealing of a moving oil pipe and annulus return liquid, the hydraulichigh-pressure particle jet flow plug drilling effect is verified, and hydraulic high-pressure particle jet flow plug drilling optimization construction parameters are obtained.

Description

technical field [0001] The invention relates to a hydraulic high-pressure particle jet drilling plug test device, which belongs to the field of petroleum drilling. Background technique [0002] With the continuous deepening of oilfield development, in order to meet the production needs, technological constructions such as plugging and sealing layers, cement plugging blastholes, oil and water well inspection and plugging, and long-term shutdown wells to resume production are gradually increasing. During the construction of these technologies, cement will be produced. The plug surface needs to be drilled out through plug drilling operations. There are two commonly used plug drilling methods at present. One is to drive the downhole drill bit to rotate through the wellhead rotary table. This method requires major overhaul of operating equipment and high investment costs. Another kind is to add drill bit drilling mode by downhole screw rod, the pressurization of this method drill...

AI Technical Summary

Problems solved by technology

The other is to drill through the downhole screw rod and drill bit. In this method, the pressurization of the drill bit is difficult, and the effect of the drill plug is not ideal.

For wells with casing damage and severe casing deformation, conventional screw drilling tools and drill bits are difficult to pass through smoothly, and pipe sticking accidents are prone to occur. For small-sized wells, drill plug tools cannot be lowered, and pipe stuck accidents are prone to occur

At the same time, during the mechanical rotation of the drill bit, it is easy to cause the drill bit to grind and mill the casing, which may easily lead to damage to the casing

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