Output profile logging instrument and pushing power connector thereof

Abstract

The invention discloses an output profile logging instrument and a pushing power connector thereof. The pushing power connector comprises a connector jacket, a pre-pressing elastic piece, a lock catch plug, a power push rod and a sliding head, wherein the power push rod is locked in the connector jacket through the lock catch plug, the outer end, extending out of the connector jacket, of the power push rod is used for being connected with a pushing power control short section, the sliding head is positioned on one side of the step in the connector jacket and is hinged with the free end of a measuring arm, and the pre-pressing elastic piece is arranged in the connector jacket and abuts against the position between the sliding head and the lock catch plug. According to the scheme, the pushing power control short section drives the connector jacket to move through the power push rod; the pre-pressing elastic piece acts on the measuring arm through the sliding head, so that the measuring arm is elastically opened to adapt to the size of a borehole; and in addition, when the pushing power control short section breaks down, automatic retraction of the measuring arm can be achieved on the basis of the compressibility of the pre-pressing elastic piece.

Description

Technical field [0001] Technical Field The present invention relates to equipment dynamic monitoring of oil and gas wells, more particularly to a logging tool and its production profile is pushed against a power connector. Background technique [0002] With the progress and the constant expansion of domestic shale gas development, a large number of horizontal shale gas wells at different stages of the development process, need to be output profile logging, only foreign companies have the technology logging tools, construction output profile logging carried out in the domestic shale gas area. [0003] Construction of horizontal well logging through production tubing, when measuring the depth of wells placed under the logging instrument, the operator through the ground to the downhole instrument issued instructions to start pushing against the electric power control section is short, the measuring arm opening, measuring vertices close to the casing wall arm, the arm carrying the me...

AI Technical Summary

Problems solved by technology

[0004] However, casing types and inner diameters are different, and there may be wavy sand beds formed in horizontal wells, which may cause the inner diameter of the wellbore to be large or small, and casing deformation may exist, which affects the opening degree of the measuring arm and makes each of the arrays The position of the probe on the wellbore section changes

[0005] In addition, the instrument works in a high-temperature and high-pressure environment thousands of meters underground. Once the electrical and mechanical failure of the electric push power control sub-joint occurs, it will not be able to load the power and retract the opened measuring arm. When the instrument is lifted, the instrument cannot Getting stuck from a large-diameter casing into a small-diameter tubing, resulting in an accident in which the instrument fell into the well

[0006] In addition, the push recovery mechanism adopts motor power. One end of the Φ6 power push rod is connected to the electric mechanism and is located in the normal pressure push power control nipple. The other end of the power push rod extends out of the push power control nipple and is exposed to underground high pressure The measuring arm connection of the environment, if the power push rod is suspended in the air and placed in a high-pressure environment, taking the underground high pressure of 70MPa as an example, it will generate about 200 kg of resistance to the Φ6 power push rod, preventing the power push rod from extending out of the push rod under normal pressure. The pup joint is controlled by power, and the power of the motor cannot overcome such a large resistance, and it cannot play the role of pushing and opening the measuring arm

At the same time, the existing instruments cannot accurately measure the opening of the measuring arm (hole diameter value), which makes it impossible to obtain the exact spatial position of each probe of the array carried on the measuring arm

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