While-drilling adjustable tapered stabilizer

Abstract

The invention discloses a while-drilling adjustable tapered stabilizer comprising a shell, a signal valve, a first piston column, a bevel body, a chute, a rib, a support block, a spring, a second piston column, a connector, a rotation groove and a pin rod; and one side of the interior of the shell is provided with the signal valve. The while-drilling adjustable tapered stabilizer is arranged, thesize of the stabilizer is adjusted, the well inclination control capability of a lower drilling tool is changed, the hole drift angle of a well is accurately controlled, the small diameter state in the drilling process is kept, the blocking phenomenon is avoided, the problems of blockage and clamping during lower drill lifting of the stabilizer are solved, major accidents such as well collapse andblowout caused by suction of pulling supporting blocks are fundamentally eliminated, safety is ensured, and major economic losses are avoided. By means of the while-drilling adjustable tapered stabilizer, simple and quick adjustment can be carried out by starting and stopping pumps simply, so that well inclination can be precisely controlled. In a horizontal section, the size of the stabilizer isadjusted, and the TVD (deep depth) can be accurately controlled.

Description

technical field [0001] The invention relates to the technical field of stabilizers, in particular to an adjustable diameter-reducing stabilizer while drilling. Background technique [0002] The stabilizer, also known as the centralizer, is a tool for stabilizing downhole drilling tools and preventing deflection. It is connected to a section of drill string close to the thick diameter drilling tool to stabilize the drilling direction. It is a tool for oil, natural gas and geological exploration. In drilling engineering, it is an important tool to prevent the change of well deviation. The traditional stabilizer is easy to cause the problem of getting stuck when drilling down, and when drilling down or horizontally, it needs to be pulled out for replacement. Caused wellbore collapse, blowout and other major accidents, therefore, it is necessary to design an adjustable variable diameter stabilizer while drilling. Contents of the invention [0003] The object of the present in...

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Problems solved by technology

[0002] The stabilizer, also known as the centralizer, is a tool for stabilizing downhole drilling tools and preventing deflection. It is connected to a section of drill string close to the thick diameter drilling tool to stabilize the drilling direction. It is a tool for oil, natural gas and geological exploration. In drilling engineering, it is an important tool to prevent the change of well deviation. The traditional stabilizer is easy to cause the problem of getting stuck when drilling down, and when drilling down or horizontally, it needs to be pulled out for replacement. Causing major accidents such as wellbore collapse and blowout, therefore, it is necessary to design an adjustable variable-diameter stabilizer while drilling

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