What is a stator of a mud motor?
The stator acts as the outer gear, and is made from a moulded elastomer featuring at least two lobes. The OD of the elastomer is protected by a secure metal casing. The rotor is positioned within the stator, and acts as an internal gear. This rotor is made of metal, and will have one less gear or lobe than the stator.
What are the main three components of a mud motor?
Normal mud motor construction consists of a top sub, which connects the mud motor to the drill string; the power section, which consists of the rotor and stator; the transmission section, where the eccentric power from the rotor is transmitted as concentric power to the bit using a constant-velocity joint; the bearing …
What is the difference between RSS and mud motor?
RSS enables drill string rotation while deviating the wellbore. The difference in this steering mechanism makes RSS drills faster than the conventional mud motor while building or dropping well trajectory angle. Table 1 shows a comparison of ROP between RSS and conventional steerable motor.
How does a mud motor work?
How does a mud motor work? The typical mud motor unit consists of an air-cooled engine mounted to an elongated direct drive shaft and steel prop. This single motor bolts directly onto the transom of the boat and doubles as a pivot point for the motor, making it easy to switch your navigation in a pinch.
What is a rotor stator?
The stator and rotor both are the parts of the electrical motor. The significant difference between the rotor and the stator is that the rotor is the rotating part of the motor whereas the stator is the stationary part of the motor.
What is the purpose of a stator?
In an electric motor, the stator provides a magnetic field that drives the rotating armature; in a generator, the stator converts the rotating magnetic field to electric current. In fluid powered devices, the stator guides the flow of fluid to or from the rotating part of the system.
What is differential pressure on a mud motor?
Differential pressure is the key to drilling with a mud motor. Knowing your off-bottom pressure, on-bottom pressure and stall point will increase your rates of penetration and ensure maximum drilling hours with the motor. Differential pressure is the key to drilling with a mud motor.
Is mud motor part of BHA?
The mud motor is made up into the BHA of the drill string below the bent sub, between the bent sub and drill bit (Fig. 3.20).
What is RSS in oil and gas?
A rotary steerable system (RSS) is a form of drilling technology used in directional drilling. It employs the use of specialized downhole equipment to replace conventional directional tools such as mud motors.
How does a rotary steerable work?
A tool designed to drill directionally with continuous rotation from the surface, eliminating the need to slide a steerable motor. Rotary steerable systems typically are deployed when drilling directional, horizontal, or extended-reach wells.
What are the advantages of mud motor?
Improvements in the mud motor design allowed not only to expand the rotation range of motor as part of the BHA, but also improved the wellbore passage indicators. As a result, a more reliable modification, which allows the BHA to be rotated at a significantly higher speed, was obtained.
What is use of stator and rotor in motor?
The stator then is the stationary part of the AC motor. The rotor is the rotating electrical component. It also consists of a group of electro-magnets arranged around a cylinder, with the poles facing toward the stator poles. The rotor is located inside the stator and is mounted on the AC motor’s shaft.
What’s the purpose of a stator?
What is a rotor in a motor?
The rotor is located inside the stator and is mounted on the AC motor’s shaft. The term “rotor” is derived from the word rotating. The rotor then is the rotating part of the AC motor. The objective of these motor components is to make the rotor rotate which in turn will rotate the motor shaft.
How does a positive displacement mud motor work?
In these systems the drill pipe is not rotated; a positive displacement motor is part of the bottom of the drill string above the drill bit. Pumping mud down the drill string (i.e., direct circulation) then turns the pump, which translates into torque applied directly at the drill bit.
What is a mud motor stage?
A mud motor is described in terms of its stages, lobe ratio and external diameter. Stages are the number of full twists that the rotor makes from one end to the other and the lobe ratio is the number of lobes on the stator, to the number of lobes on the rotor (the stator always has one more lobe than the rotor).
What does a BHA consist of?
A bottom hole assembly (BHA) is a component of a drilling rig. It is the lowest part of the drill string, extending from the bit to the drill pipe. The assembly can consist of drill collars, subs such as stabilisers, reamers, shocks, hole-openers, and the bit sub and bit.