Method for preventing eccentric wear of pumping rod and oil tube and separate-zone whole production tubular column

Abstract

The invention discloses a method for preventing eccentric wear of a pumping rod and an oil tube and a separate-zone whole production tubular column. The method for preventing eccentric wear of the pumping rod and the oil tube comprises the following steps: pressing weight needed for setting of a mechanical packer is obtained according to the technical parameters of the mechanical packer; the weight of the single oil tube needed by the mechanical packer and the mass, size and height of a balancing weight are obtained; the number of balancing weights needed by the mechanical packer is obtained according to the pressing weight, the weight of the single oil tube and the mass, size and height of one balancing weight, and n is larger than or equal to 1; and the n needed balancing weights sleeve the oil tube, so that the neutral point of the separate-zone whole production tubular column is located below a separate-zone oil production pump. By adopting the above technical scheme, the technical problem in the prior art that eccentric wear easily occurs in the pumping rod and the oil tube in the separate-zone whole production tubular column is solved, and the eccentric wear of the pumping rod and the oil tube of the separate-zone whole production tubular column is prevented.

Description

technical field [0001] The invention relates to the technical field of oil recovery engineering in the petroleum industry, in particular to a method for preventing eccentric wear of a rod and tube and a layered simultaneous production string. Background technique [0002] The geological structure of the oilfield is complex, and most blocks have problems such as long production intervals of oil wells, multiple layers, high reservoir variation coefficient, and high comprehensive water cut, which makes interlayer interference serious and crude oil extraction difficult. Nowadays, through the research on the interlayer interference problem, different layered simultaneous mining technologies have been formed, and remarkable application effects have been achieved. [0003] However, for the lifting of crude oil in deep wells, the existing layered simultaneous production string structure is not adaptable. The lower section of the oil pipe at the upper end of the mechanical packer wil...

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Problems solved by technology

[0005] The embodiment of the present invention provides a method for preventing eccentric wear of rods and tubes and a layered co-production tubing string, which is used to solve the technical problem that eccentric wear of the sucker rod and tubing in the mid-layer co-production tubing string in the prior art is easy to occur, and prevent Rod and tube eccentric wear

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