Downhole accident

1, what is the accident of falling?

Answer: objects (such as drilling tools, drilling tools, hand tools) from the wellhead fell into the well, called the accident of falling.

2, the cause of the accident of falling?

Answer: (1), accidentally in the wellhead operation caused by hand tools, wellhead tools fall well.

(2) on the turntable, chaos tools or other things to let go, when the collision put objects or because of rotation of the turntable makes things fall well.

(3), some fixed screw tower derrick, due to loosening off well.

(4), at the wellhead illegal operation, such as drill collar and coring tool, not the card safety slip, with a crane lifting sub drill head is not closely linked, etc.. By drilling down the well.

3, what is the harm of the accident of falling?

Answer: (1) in drilling to drop something well, may be caused by falling objects sticking accidents.

(2), in the drill, drill out well drilling, bending or meal attached to the well wall, often cause sticking accidents or damage of the well.

(3), falling accident treatment, are generally more difficult, requires a certain period of time, have different effects on production.

4, how to prevent the accident of falling?

Answer: (1) will be prohibited, hand tools, screws and put it on the turntable.

(2), cover the wellhead wellhead in the use of hand tools, tools to prevent falling.

(3), and before the tripping tripping process, according to the provisions of the maintenance good tongs, slips and elevators and other tools, there to fix problems in a timely manner.

(4), tripping prohibited illegal operation, lifting subs to clamp tightly, drill collar card safety slip etc..

(5), drill to drill, drill quickly cover the box, is turning a bit at the wellhead.

(6), turntable, derrick screw regularly, with hand tools on the derrick to fasten safety rope.