FIELD: mining.
SUBSTANCE: access to adjusting screws of the device assembly is provided; rotary drive of tool head about the well axis is performed with two hydraulic motors. Hydraulic motors are located diametrically opposite to each other. They ensure the alignment of cutting forces at turning of conical surface of casing pipe head and cutting of thread on it.
EFFECT: excluding the process of element-by-element assembly of the device at the well head and reducing labour intensity and the time required for installation of the device on the pipe; avoiding the jamming of cutting head; reducing the time required for thread cutting process.
1 cl, 8 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
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| 0 |
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