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How to deal with accidents in the hole when drilling
Jun 14, 2017

How to deal with accidents in the hole:

The first step, methods and problems should be paid attention to

How to adopt the first step treatment method and the problems needing attention in hole accidents

(1) mention:

Under the condition that the equipment capacity permits, the elevator can be used to block the drilling tool in the strong pulling hole. When the drill is buried card, generally used this method, but must pay attention to the steel wire rope, crane, derrick, drill and foundation etc., best equipped with "pull", to prevent personal accident.

(2) hit:

Strike the drilling tool up or down with the shock force of the hammer. The method is suitable for the accident of shallow hole or falling block and steel particle pinch. This method is simple, so it is often used. When the accident is dealt with the punching hole with a hanging hammer, a pulley, a hammer and other safety hammers can be used.

Use the hammer in treatment of hole accident should be paid attention to: best not to use the elevator directly binding punching hammer; hole wall instability and prone to collapse, should not use this method, otherwise, will cause the deterioration of the accident.

(3) shock:

The mechanical vibrator is connected to the upper end of the accident drilling tool and is pulled by the elevator to eliminate the strong vibration caused by the accident drill pipe. But attention must be paid to prevent the bore bore from being disturbed.

(4) fishing:

With the male and female hammer, etc. for drill pipe blocking accident fall off or broken. This is a commonly used method for dealing with accidents.

(5) shock:

Through the high pressure liquid flow of the mud pump, the buried and stuck material around the accident drill pipe is broken through the small hole drilling tool (or drill pipe) or the sleeve pipe. But this method must be used when the hole wall is stable.

(6) grasping:

A small object or inclinometer that falls into a hole with a lower toothed grab barrel.

(7) suck:

The utility model uses a magnet to salvage and absorb the small objects falling into the holes or to suck the broken ends of the drill pipe which is against the wall of the hole, and to salvage with the screw hammer.

(8) sticky:

Take out into the hole of small objects or diamond bit matrix or diamond with sticky mud, yellow wax and asphalt viscosity.

(9) channeling:

Use lift, lift hammer, up and down strike, or drive up and down, for dealing with a certain movement of the trapped fault drilling tools.

(10) top:

It is also a common method to use Jack (screw and hydraulic) or oil hydraulic drilling rig to add and subtract oil pressure and pull out accident drilling tools. But should pay attention to: with jack lifting, should consider the ability to withstand the drill pipe, in case of top breaking; also should pay special attention to slips fly out wounding.

Second steps and problems should be paid attention to

How to adopt second steps to deal with in hole accidents and the problems that should be paid attention to

(1) against:

With the anti - wire drill pipe and the wire hammer, find the neutral point, and return back a few of the accident drill pipes as much as possible, and then cooperate with other methods to deal with them. Because "anti" is not a separate method of handling accidents within the hole.

Safety measures shall be adopted for the reverse drilling rod, such as wire rope anti - drilling tool, ratchet and pipe reversal device. In addition, it prevents the occurrence of personal accidents due to elastic inversion in the reverse drilling tool.

(2) set:

The drilling tool is larger than the larger one, so it is only suitable for the soft rock stratum and the shallow hole rock formation. When there is an accident drill pipe in the hole, it must be "anti" and "back"". When reaming, the belt should be oriented in order to prevent the drilling hole from bending.

(3) cut:

Take out the accident drill by segment cutter. This method is used to process drill cards and bury them in tight and long cases. The use of "cut" is often used to deal with core pipe or casing accidents.

(4) hook:

With a special hook spear, etc., to guide the accident drill head aside, or hooked joints will increase, the drilling tools proposed, or to fall into the hole of the wire rope and cable etc..

Third steps and problems should be paid attention to

How to adopt third steps to deal with in hole accidents and the problems that should be paid attention to

(1) wear:

With than the original drilling accident drill small 1-2 (best 2) from the first accident drill, drill center through the vibration, rotation and collision, in order to reduce or eliminate the accident by pinching the drill lateral resistance, then treated with the method of "fishing". When core, pipe joint, core pipe and powder collecting pipe are left at the bottom of the hole, they should be treated by stripping and other methods before adopting the "wear" method.

(2) peel off:

The drill bit and drill with the diameter of the original accident will take iron, powder tube or pipe joint, take powder tube until the thread at the periphery off one layer, and then remove the joint.

(3) sweep:

Use a specially designed flat drill to split or sweep out the drill or drill bit in the remaining hole, and then remove it. In the "sweep" or "chop", pay attention to the drill and long splitting.

(4) bubble:

The diesel oil, salt water or hydrochloric acid injection hole, immersion buried or mud suction pipe sticking accident, the tool and the hole wall for relaxation.

How to adopt fourth steps to deal with in hole accidents and the problems that should be paid attention to

(1) winding:

Drill with eccentric wedges to bypass the accident drill. When this method is adopted, it must be designed according to address.

(2) deep fried:

The explosive is arranged in a special blasting cylinder, and is sent into the predetermined hole depth from the drilling tool to explode, blow off the drill pipe and then be taken out, or used for processing the casing to be clamped, so as to shock or loose the casing.

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