Sucker Rod

Product Detail

Sucker Rod









A sucker rod is a steel rod, typically between 25 and 30 feet (7 to 9 meters) in length, and threaded at both ends, used in the oil industry to join together the surface and downhole components of a reciprocating piston pump installed in an oil well. The pumpjack is the visible above-ground drive for the well pump, and is connected to the downhole pump at the bottom of the well by a series of interconnected sucker rods. Sucker rods are also commonly available made of fiberglass in 37 1/2 foot lengths and diameters of 3/4, 7/8, 1, and 1 1/4 inch. These are terminated in metallic threaded ends, female at one end and male at the other.




The surface unit transfers energy for pumping the well from the prime-mover to the sucker rod string. In doing this, it must change the rotary motion of the prime-mover to reciprocating motion for the sucker rod. And it must reduce the speed of the prime-mover to a suitable pumping speed. Speed reduction is accomplished by using a gear reducer, and rotary motion of thencrank shaft is converted to oscillatory motion by means of a walking beam. The crank arm is connected to the walking beam by means of a pitman arm. The walking beam is supported by a Samson post and saddle bearing. The horse head and bridle are used to ensure that the pull on the sucker rod string is vertical all times so that no bearing movement is applied to that part of sucker rod string above stuffing box. The polished rod and stuffing box combination is used to maintain a good liquid seal at the surface.







MECHANICAL PROPERTIES

API Grade	Min Yield Strength		Min Tensile		Max Tensile
	Mpa	Psi	Mpa	Psi	Mpa	Psi
K	414	60000	621	90000	793	115000
C	414	60000	621	90000	793	115000
D	586	85000	793	115000	965	140000
H	793	115000	965	140000	1195	173000

 

TECHNICAL PARAMETERS

Size	Rod OD in	Thread OD In	Length of Pin mm	Length of Wrench mm	Width of Wrench mm	Length of Rod mm
5/8	5/8	15/16	31.75	= 31.8	22.20	2 / 4 /6 / 8 /10/25/30
3/4	3/4	1-1/16	36.50	= 31.8	25.40	2 / 4 /6 / 8 /10/25/30
7/8	7/8	1-3/16	41.28	= 31.8	25.40	2 / 4 /6 / 8 /10/25/30
1	1	1-3/8	47.63	=38.1	33.30	2 / 4 /6 / 8 /10/25/30
1-1/8	1-1/8	1-9/16	53.98	=41.3	38.10	2 / 4 /6 / 8 /10/25/30




We can also provide conventional API sucker rods, corrosion resistant sucker rods, FRP (fiber glass reinforced plastic) sucker rods, polished sucker rods and couplings, special sucker rods for progressive cavity pumps, hollow sucker rods and electric heating systems.