What is the rat hole on a drilling rig?

What is the rat hole on a drilling rig?

A rathole is a hole in the rig floor, 30 to 35 feet deep, lined with casing that projects above the floor, into which the kelly is placed when hoisting operations are in progress. This is either done by the portable rig that drills the conductor hole or can be done by the primary rig after rigging-up.

What does it mean to rat hole?

1a : a rat’s burrow. b : a hole gnawed by a rat. 2a : a narrow opening, tunnel, or passageway. b : a cramped space (as for storage or living quarters) especially : one that is oppressive or filthy cooped up in a rathole like this — Jack Ward.

What is a mousehole in engineering?

The mousehole is the storage area on a drilling rig where the next joint of drilling pipe is held until needed. This hole is in the floor of the rig, bored into the earth for a short way, and usually lined with a metal casing known as a scabbard.

What is the difference between a mousehole and a rathole?

Unlike the mousehole, the rat hole serves to hold the kelly when drill pipe is being pulled and moved. In a standard mousehole, a 30-foot drill pipe is waiting to be added to the drilling operation. The crew will swing the kelly over the mousehole, attach the pipe, and then pull it out of the mousehole.

What is Drawworks in drilling rig?

The drawworks is a part of the system that rotary drilling rigs use for hoisting, or lifting, the drill stem and casing out of the hole. A compounding transmission, or compound, sends power from the engines to the drawworks, the rotary table, and the mud pumps.

What is Kelly Bar?

Kelly bars (also called grief joints, kelly joints and kelly stems) are used during the execution of boreholes by hydraulic rotary drilling rigs. The bars themselves are hollow and attach to the top of the drill column.

What are rat holes called?

Rat Nests. Some species of rats create underground pathways or burrows. These underground nests usually consist of food storage areas and living spaces.

How are mouse holes made?

They definitely aren’t like the openings in the cartoons. Instead, mouse holes inside and outside a building will appear as: A damaged section of wall or paneling. A gap between two pieces of building material.

Can a mouse make a hole in a wall?

Mice are capable of fitting through extremely small openings in floors, walls and foundations. After they enter homes, they can be extremely difficult to get rid of.

How do you know if a rat is in your room?

How to Tell if You Have Mice or Rats

  1. Urine Odor. Rodent urine has a strong musky odor.
  2. Gnawed Holes. Gnawed mouse holes are small, clear-cut, and about the size of a dime.
  3. Rub and Gnaw Marks. Oily rub marks are left in places where rodents travel along walls.
  4. Runways.
  5. Nests.
  6. Noises.
  7. Pet Behavior.

What is rathole poker?

To remove a portion of one’s money or chips from the table without leaving the game. ADDITIONAL INFORMATION: Occurs most commonly after a player has won a large pot. Some cardrooms prohibit ratholing.

What is mud pump in drilling?

A mud pump (sometimes referred to as a mud drilling pump or drilling mud pump), is a reciprocating piston/plunger pump designed to circulate drilling fluid under high pressure (up to 7,500 psi or 52,000 kPa) down the drill string and back up the annulus.

How does a drawworks work?

What is Travelling block Derrick?

An arrangement of pulleys, or sheaves, through which drilling line is reeved and which moves up and down in the derrick or mast.

What is master bushing?

A device that fits into the rotary table to accommodate the slips and drive the kelly bushing so that the rotating motion of the rotary table can be transmitted to the kelly.

Should I block up a rat hole?

The best method to take is to block up the holes and allow a pest control professional to eliminate the rats from your garden.

What does a rat hole look like in the ground?

So, what does a rat hole look like? The entrance to a rat’s burrow is typically 2 to 4 inches across. Active burrows have smooth walls and the dirt is hard-packed with loose dirt fanning out at the entrance. The entrance will also be clear of debris and spider webs.