Disassembly and assembly tool for floating valve core and float valve using same

Abstract

The invention discloses a disassembly and assembly tool for a float valve core and a float valve using the same. The disassembly and assembly tool for the float valve core comprises a rotary handle, aconnecting rod, a righting ring and a cross wrench, wherein the rotary handle is connected to the top end of the connecting rod, the cross wrench is connected to the lower end of the connecting rod,and the connecting rod between the rotary handle and the cross wrench is provided with the righting ring. The disassembly and assembly tool is low in manufacturing cost and convenient to use; and theexternal thread float valve core which is installed by the disassembly and assembly tool and an internal thread float valve joint do not generate a series motion, so that abrasion between the externalthread float valve core and the internal thread float valve joint is avoided, the service life of the float valve is prolonged, and the safety of a downhole tool and the well control safety are moreeffectively guaranteed.

Description

technical field [0001] The invention belongs to the field of drilling engineering for resources such as oil and natural gas, and in particular relates to a tool for removing and assembling a valve core of a float valve and a float valve using the same. Background technique [0002] The float valve joint is a must-have tool in oil and gas drilling operations to meet the well control needs. The float valve spool is a check valve and is set in the inner cavity of the float valve joint, which can effectively prevent formation and wellbore annular fluid It emerges from the drilling tool to ensure the safety of well control. [0003] At present, the float valve spool installed in the float valve joint used in oil and gas drilling tools is directly installed or disassembled. From the perspective of field application, the conventional installation of the float valve spool has the following disadvantages: 1) Directly install the float valve spool Due to the old and new state of the ...

AI Technical Summary

Problems solved by technology

[0003] At present, the float valve spool installed in the float valve joint used in oil and gas drilling tools is directly installed or disassembled. From the perspective of field application, the conventional installation of the float valve spool has the following disadvantages: 1) Directly install the float valve spool Due to the old and new state of the tool, it is common that it cannot be installed smoothly. The valve core needs to be knocked or smashed into the float valve joint with a hammer, causing damage to the float valve core; 2) The float valve joint is affected by the solid phase in the mud. There is a common phenomenon that it is difficult to disassemble. Generally, the floating valve core is hit or smashed out by using tools such as crowbars and hammers in the reverse direction, causing damage to the float valve core; 3) Violent disassembly methods such as knocking or smashing in and out There are large safety hazards; 4) Violent disassembly methods such as knocking or smashing in and out greatly affect the service life of the float valve spool; 5) Violent disassembly methods such as knocking or smashing in and out are inefficient; 6 ) The conventional spool is not fixed in the float valve joint. Repeated serial movement during the drilling process increases the wear between the float valve spool and the float valve joint, shortens the service life, and increases the risk of downhole tools and well control

In order to avoid the disadvantages of the above-mentioned conventional installation of the float valve spool, reduce the risk of drilling operations, and improve the efficiency of assembly and disassembly, it is necessary to invent a safe and convenient float valve spool installation tool to achieve safe, efficient, and high-quality completion of the drilling tool assembly. and dismantling operations to ensure the safety of well control in drilling operations

At the same time, the number of threads of the external thread of the existing float valve spool and the thread of the internal thread of the float valve joint are set in an equal manner, which is not conducive to effective protection of the internal thread of the float valve joint.

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