The top drive is one of the components of the drilling rig that is used to rotate the drill string during drilling, having 1000 horsepower, which rotates the shaft to which the drill string is attached. It decreases th.
[pdf] A down-the-hole drill, usually called DTH Drilling Rig, is basically a mini jackhammer screwed on the bottom of a drill string. The speedy hammer activity breaks hard stone into little flakes and dust and can be dismissed evident by the air exhaust in the DTH hammer.
[pdf] 
The top drive is one of the components of the drilling rig that is used to rotate the drill string during drilling, having 1000 horsepower, which rotates the shaft to which the drill string is attached. It decreases the amount of manual work and labor that is involved in the conventional drilling Kellysystem, hence,. .
The top drive has many advantages that help better its functions during the drilling involving safety and efficient way of drilling and are enlisted below: 1. In the top drive system, it is. .
The following list is the list of components that are involved in a tip drive system: 1. Elevator 2. Bail Assembly 3. Grabber Assembly 4. Saver Sub 5. Stabbing Valve 6. Tilt. .
As the rotation to the drill stem is provided by the top drive, in the top drive system, so the Kelly and the Kelly bushing is not required in this system. However; for the support of slip and weight of a drill stem and as an opening for lowering or raising of drill stem into the borehole, a rotary table, and a master bushing are installed in this . .
A top drive is a mechanical device on a that provides clockwise torque to the to drill a . It is an alternative to the and . It is located at the place below the traveling block and moves vertically up and down the derrick.
[pdf] 
