In order to reduce the influence of factors such as vertical and horizontal bending of the sucker rod and unstable deformation, corresponding measures have been taken. The implementation is as follows: OPRS and PEoffice are used to optimize the design system of the pumping well system. According to the principles of long stroke, low stroke frequency and high pump efficiency, the rod combination ratio of the inspection well is optimized, and the optimization rate of the inspection well is 100%; some wells The rod-column combination is changed from two levels to three levels, that is, Φ32 mm Φ19 mm Φ22 mm, which reduces the downward resistance of the sucker rod and moves the neutral point of the rod string downward, so as to reduce the amplitude of the alternating stress change of the rod string and reduce the oil The post is unstable and bent.
In order to reduce the sinusoidal bending or spiral instability bending of the lower tubing string under the action of internal pressure and axial pressure during the upstroke of the production well, it is considered to install tubing anchors and deeper tailpipes under the tubing string to improve the tubing stress The situation achieves the purpose of reducing the wear of pipes and rods, and at the same time plays the role of reducing stroke loss and improving pump efficiency.
Reasonable adjustment of production parameters The production parameters here mainly refer to the stroke of the pumping unit, the number of strokes, the depth of the oil pump into the well, the selection of the displacement of the oil pump, etc. It is a combination of surface and well parameters. It will affect the stability of the structure in the well. The application of the rotating device of the oil pipe and the sucker rod applies the sucker rod and the oil pipe rotating device, and the wear on one side of the rod and the pipe is uniformly worn in the circumferential direction, which reduces the partial wear between the rod and the pipe.
Rubber Damper, also known as Shock Absorber, Isolator, and NBR grommet, NBR is a unsaturated rubber copolymer with polar unsaturated carbon chains, which is copolymerized by propenenitrile and butadiene, according to propenenitrile content from low to high, the higher the resistance to oils but the lower the resistance to cold. Oil resistance is the greatest advantage of NBR elastomer so it has excellent resistance to petroleum base oils and non-polar solvents but poor resistance to polar oils and polar solvents.
Nitrile rubber (NBR, Buna-N) grommet provides excellent resistance to petroleum oils as well as mineral and vegetable oil. Nitrile rubber also offers strong resistance to heat aging - often a key advantage over natural rubber.
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