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The function of spiral drill collars

release time：2023-12-11

source： network

Spiral drill collars are used to machine three right-handed spiral grooves on the outer cylindrical surface of circular drill collars. Leave a 305~560mm section at the external threaded end joint and a 457~610mm circular drill collar section without machining spiral grooves at the internal threaded end joint for ease of connection and repair. The weight is 4% less than that of circular drill collars of the same size.

In directional drilling, due to the large size of the deviated well, the contact area between the drill collar and the wellbore wall is larger, making it more prone to sticking and sticking the drill bit. The spiral drill collar reduces the contact area with the wellbore wall, effectively preventing differential pressure sticking, so it has been widely adopted.

Precautions for using non-magnetic drill collars

The function and shape classification of drill collars

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Precautions for using non-magnetic drill collars

The function and shape classification of drill collars

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