Real people appear on the down-the-hole drill

A down-the-hole drill, usually called DTH by most professionals, is basically a jackhammer screwed on the bottom of a drill string. The fast hammer action breaks hard rock into small cuttings and dust that are evacuated by a fluid (air, water or drilling mud). The DTH hammer is one of the fastest ways to drill hard rock. The system is thought to have been invented independently by Stenuick. Origin of the nameDTH is short for “down-the-hole”. Since the DTH method was originally developed to drill large-diameter holes downwards in surface-drilling applications, its name originated from the fact that the percussion mechanis. . In DTH drilling, the percussion mechanism – commonly called the hammer – is located directly above the drill bit. The drill pipes transmit the necessary feed force and rotation to the hammer and the bit, along with the flui. [pdf]

People from the crowd screw air compressor

A screw compressor is a type of positive displacement compressorthat uses two spiral screws to compress the gas. It uses a positive displacement rotary mechanism for the compression of gas. The scre. [pdf]

Elevator drilling rig

Drill pipe elevators for USC with taper shoulder and square shoulder weld-on tool joints shall have bore dimensions as specified in Table 1. Notes on Table 1: Oilfield elevators with identical bores are the same. 1. * Not Manufactured. 2. ** Obsolescent connection. 1. 1 Dimension DTE from API Spec. 7, Table 4.2 2. 2. . A very close fit of the hinge pin and pawl significantly affects the correct functioning of an elevator – especially the center-latch elevator. If there is play in the hinge, the elevator tends to. . In addition to the side-door elevator, single-joint and slip-type casings are used in running casing. We use a single-joint elevator (Figure 7) to. . Since both care and inspection procedures depend primarily upon the amount of service the equipment has had, it is challenging to project. . The following checks apply to all types of elevators. For a quick reference to critical points of the drill pipe elevators, see Figure 29. 1. Is the oilfield elevator size correct? 2. Are the dies of slip-type elevators sharp? 3. Are the hinge pin or holes worn? 4. Are. [pdf]