What problems will trenchless drilling rig encounter during construction?

Classification:

Company News

Release time:

2021-08-20

【Summary Description】 During reaming or hole cleaning, all or part of the drill pipe with the back belt of the reaming bit loses connection with the reaming bit and falls off in the hole.

非开挖

First,TrenchlessThe drill pipe may fall off:

1.form of expression

During reaming or hole cleaning, all or part of the drill pipe with the back belt of the reaming bit loses connection with the reaming bit and falls off in the hole.

2.cause analysis

(11) The drill pipe swinging during reaming or hole cleaning causes the drill pipe joint screw thread loosening and tripping.

(23) The hinge shaft of the transfer case falls off during reaming or hole cleaning, which causes the hinge shaft to fall off.

3.Preventive measures

(12) During reaming or hole cleaning, the joint with drill pipe behind the drill bit must be tightened with pliers, and the two joints closest to the transfer case must be tightened strongly.

(2) Crossing at the shaft end of the transfer case hinge shaft during reaming or hole cleaning8The lead wire fixes the lock nut.

Second,TrenchlessIn the construction process, the pipe is pulled and dropped:

1.form of expression

When the pipe is dragged into the hole, the pipe loses connection with the transfer case in the middle and falls down.

2.cause analysis

(12) When the pipe is pulled forward in the hole, the resistance is relatively large. The plug in the pipe head is soft and is pulled into a gap by the wire rope, and the wire rope pulling the pipe is separated from the pipe head.

(2) When pulling the pipe, the central pulling shaft of the transfer case fails and does not rotate. When the reaming drill bit rotates, the wire rope of the pulling pipe behind the transfer case will be twisted and the pipe will fall off.

3.Preventive measures

(12) The wooden plug of the pipe head shall be made of hard wood, and the resistance of the pipe shall be reduced when pulling the pipe.

(24) Remove the transfer case before pulling the pipe, clean the mud accumulated inside and add grease to make the central pulling shaft rotate reliably.

The above isTrenchlessFor the problems that may be encountered in the working process of the drilling rig, please continue to pay attention to Weilida drilling tools and shake the sound number:WEILIDA drilling.

Key words:

weilida drill