rod string

rod string

[′räd ‚striŋ]
(mechanical engineering)
Drill rods coupled to form the connecting link between the core barrel and bit in the borehole and the drill machine at the collar of the borehole.
References in periodicals archive ?
The downhole system consists of a positive displacement pump, which can be installed to sit deeper in a well than traditional rod pumps, a submersible linear electromagnetically actuated motor, which drives the pump and eliminates the need for the long rod string (a primary source of failure in rod lift systems) and a sensor, which provides pressure and temperature data to help ensure the highest level of production optimization and system longevity.
During the process of sucking viscoelastic fluid, clearance between pump barrel and plunger, and rod tube flow passage lead to the increase of down resistance of the sucker rod, the resistance reduces gradually from the largest value at the bottom to the neutral point, which causes lateral force of the rod string, and results in partial wear.
The HydroBurst HB125 is capable of replacing pipes from 4-20 inches in diameter and features a unique rotating rod string that can punch through collapsed lines.
This lifts them from the rack and holds them under the chuck, whilst the rotation threads them up to the rest of the rod string.
ACenter Pivot Extreme riser provides a stiff shooting platform and is the base for the one-piece synthetic grip, Revolver Riser Dampeners, FLX-Guard cable-containment system and carbon rod string stop.
It is important to note that a beam pumping system converts the rotational motion on the surface to a vertical lifting mechanism of the rod string and downhole plunger unit.
When using the TIP method, small to medium sized deformations and off-settings can be evened out and the circular profile of the pipe restored with a roller grinding head attached to the rod string.
The rate of change of hole direction has to be closely monitored to ensure that hole deviations do not exceed the capabilities of the rod string.
Also, according to Griffin, American Millennium will monitor the load cell on the rod string and the down hole pump.
A one-piece synthetic grip with semi-soft BOWTECH logo inlays, a stainless steel stabilizer mounting insert, a carbon rod string stop and the Bio-Shock Extreme Dampening System complete the CPX package.
It transfers the sucker rod string load of a well into the balance load of a corresponding well.
A torqued joint rod string lends itself to the ability to handle thrust loads encountered when pushing around sweeping bends, through encrusted lines, line collapses and long burst lengths.