1, what is the electric accident?
Answer: in the end and after completion or electrical measurement, cable, card card instrument, electrical measuring instruments and broken cable accident falling for electric accidents.
2, causes electrical accidents?
Answer: (1) cable, used for a long time, there is no time to find the broken wire.
(2), the cable in the process of decentralization, speed caused by cable twisting, resistance of pick-up card will be provided well broken cable.
(3), wellbore quality is not good, repeat logging cable in the lining out of keyway, cause the card or card instrument cable etc..
(4), mud performance is not good, the water loss caused by the collapse of the borehole, a large drop quickly in the eyes belly well, electric cable card card into the process due to the well.
(5) from the wellhead, drop litter caused by instrument, cable card card.
(6) instruments, well connected is not strong, in the drilling process, cause the instrument to fall well.
(7), a strong sense of responsibility, the instrument to the wellhead is not found in time, cause the broken cable instrument fall well.
3, how to prevent electrical accidents?
Answer: (1), carefully check whether there is a downhole cable wire breaking phenomenon for cables used for a long time, should be promptly replaced, you can't go well.
(2), in the cable in the process of decentralization, to strictly control the running speed, pay close attention to changes in tension, prevent cable twisting.
(3), good quality of well drilling, wellbore quality is not good for the well or directional well logging time more than 24 hours, to be well in the test, avoid long time will pull the wall under the keyway, by cable, card card instrument etc..
(4), before the two electric drill, to advance to the mud performance adjusted to large displacement well before drilling, to ensure wellbore free of dirt.
(5), empty wells to the wellhead cover, instrument electrical measurement before the wellhead operation attention to prevent falling objects into the well. If there is a litter out of the well, in a timely manner to drill through well treatment of falling objects.
(6), all kinds of instruments of wells to connect firmly.
(7), electrical measurement occurs when difficult or in case of card shall be provided to prevent and prohibit punch, the cable provided off, should take timely through cable card card technology.
4, how to deal with card cable accident?
Answer: take through cable card technology was through fishing.
5, how to handle the electrical measuring instruments falling accident?
Answer: (1), overshot the corresponding size of the salvage treatment.
(2), according to the instrument needs, making special tools for fishing.
6, how to deal with the broken cable accident?
Answer: (1) cable, fall into a well, first determine the location of the cable on the top of the fish.
(2), cable spear fishing.
7, a common electric accident tool?
Answer: (1) cable, spear.
(2), instrument cable socket.
(3), through cable overshot, quick connector etc..
(4), electric car.
