Device and method for measuring small diameter of Monod drilling tool/pump stator liner inner chamber

Abstract

The invention provides a device and method for measuring a small diameter of a Monod drilling tool / pump stator liner inner chamber, belonging to the technical field of measurement of the small diameter of a Monod drilling tool / pump stator liner inner chamber for oil drilling. The device for measuring the small diameter provided by the invention comprises a spring, a floating support, a probe, a fixed pulley, an inner-diameter measuring rod, a pull wire, a pull wire control gate, a fixed support, a shell, a digital display measuring instrument and the like; when the device is used for measuring the small diameter, the pull wire control gate is pulled tightly so that the floating support is contracted; the device is placed in the liner inner chamber; the pull wire control gate is released; two support points of the fixed support with the length between one lead and two leads of a stator and a support point of the floating support are used for supporting and locating; the probe senses the measuring, and transmits the sense to the digital display measuring instrument via the inner-diameter measuring rod; and the digital display measuring instrument is used for measuring and storing the small diameter data of the stator liner. The technology provided by the invention is accurate in locating, high in measuring precision, convenient in use, and capable of improving the matching precision of the Monod drilling tool / pump stator and rotor, thereby promoting the scientific design and use of a Monod drilling tool / pump.

Description

technical field [0001] The invention relates to a downhole tool used in oil drilling, in particular to a device and method for measuring the small diameter of the inner cavity of a monoboiling tool / pump stator bushing. Background technique [0002] Mono drilling tools / pumps are currently the most widely used geological exploration tools at home and abroad, and extremely important tools for oil and gas development. The stator and rotor are the most critical parts of the Mono drill / pump. The rotor and the stator of the Mono drill / pump should meet two conditions: being able to seal, that is, the curved surfaces of the rotor and the stator should form a space conjugate pair to form multiple joints. The closed cavity of the yoke is used to accommodate the medium; the continuous kinetic energy of the rotor causes the sealed cavity to move downward continuously in the axial direction. In order to ensure the sealing of the motor sealed cavity and to ensure the pressure drop that can...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a Molo drilling tool / pump stator bushing inner cavity diameter that cannot be accurately measured at present, and in order to enhance the sealing performance of the rotor and stator sealing cavity and improve the working efficiency of the screw motor. Nuo drilling tool / pump stator bush inner cavity small diameter measuring device and method

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