Why does my mechanical key keep getting stuck?
One possible cause of your problem is a bit of dust or detritus in the switch itself, causing the slider or spring mechanism to stick or catch. This is rare, but it happens: the up-and-down motion of a standard mechanical switch can allow the ingress of tiny particles into the inside of the switch itself.
What kind of problems can a stuck pipe cause?
Pipe sticking can be classified under two categories: differential pressure pipe sticking and mechanical pipe sticking . Complications related to stuck pipe can account for nearly half of total well cost, making stuck pipe one of the most expensive problems that can occur during a drilling operation.
What causes a drill to get stuck in the wall?
Drilling through depleted zones, where the pressure in the annulus exceeds that in the formation, might cause the drillstring to be pulled against the wall and embedded in the filter cake deposited there ( Fig. 1 ).
What’s the best way to depress a mechanical key?
Depress the key switch with the applicator straw or your finger, but not all the way: you want to hold the stem about halfway between its bottom and top position. This is so that there will be space left between the spring and slider and the bottom of the switch housing.
What causes a mechanical pipe to keep sticking?
Key seating is a major cause of mechanical pipe sticking. The mechanics of key seating involve wearing a small hole (groove) into the side of a full-gauge hole. This groove is caused by the drillstring rotation with side force acting on it. Fig. 3 illustrates pipe sticking caused by key seating.
What causes a spring driven clock to stop working?
Trouble shooting your spring driven clock movement. In many cases the complaint with a mechanical clock is that it stopped working after it was moved. This is usually from someone moving the clock without taking the pendulum off and this puts the clock out of beat.
What happens if you put the wrong pendulum on a weight driven clock?
The Weight Driven Clocks pendulum cannot touch anything during its swing. It is commonly found in mantle clocks that the wrong pendulum bob has been put on the clock. Bobs are lost frequently like clock keys.
Why does my clock stop when I bump something?
If it bumps anything, even slightly, then it loses some momentum and the clock will eventually stop. If these things do not fix the clock then it would be safe to assume there is a general lack of power in the time train.