Underwater oil pumping unit device

Abstract

The invention relates to an underwater oil pumping unit device which is used for the field of petroleum natural gas exploitation. The underwater oil pumping unit device provided by the invention takes buoyancy as a main power balance polished rod load and is not provided with a reduction gearbox and a reversing mechanism, so that the manufacturing cost is lower than that of an oil pumping unit with the same parameter on the land and large-batch manufacturing and utilization is facilitated; when the underwater oil pumping unit device is matched with a sucker rod up-down movement sucker-rod pump oil pumping system, favorable conditions are provided for rapidly forming the sucker rod up-down movement sucker-rod pump oil pumping system of the underwater oil pumping unit device; in a deep-water seabed oilfield, the underwater oil pumping unit device can be mounted on a seabed; the construction cost is low, so that the underwater oil pumping unit device can be mounted on the seabed in a scale of the on-land oil pumping unit; the underwater oil pumping unit device can be adaptive to deep-sea, shallow-sea and shallow-sea marginal oil field environments, and has water flow power generation, wine power generation and solar power generation functions, so that the power supply cost is reduced; and the underwater oil pumping unit device can be used for replacing oil production methods of a fixed oil production platform, a floating oil production platform and a floating and movable hoisting oil production platform, and can reach large-stroke oil production which cannot be realized by the on-land oil pumping unit.

Description

technical field [0001] The invention relates to an underwater pumping unit used in the field of underwater oil and natural gas development. Background technique [0002] Regardless of whether it is an oil field at the bottom of a lake or on the seabed, oil is produced by self-spraying at the initial stage using the original pressure of the formation. With the gradual consumption of the original pressure of the formation, if self-spraying is not possible, oil production must be performed by artificial lift. Artificial lift methods include rod pumps and electric submersibles. There are many kinds of pumps, hydraulic pumps, gas lifts, etc. Rod pump pumping technology is the earliest and most widely used. Rod pump pumping technology is divided into rod pump pumping system with sucker rod up and down movement and sucker rod rotation Rod pump pumping system, in the artificial lift pumping system on land in the world, the rod pump pumping system with the sucker rod moving up and do...

AI Technical Summary

Problems solved by technology

[0003] The development history of subsea oilfields is not long. Based on the accumulated experience in oil production on land all over the world, the rod pump pumping system with the up and down movement of the sucker rod and the supporting pumping unit should be the first choice, but the reality is that the rotary motion of the sucker rod is chosen. Rod pump pumping system and gas-lift pumping system supporting underwater Christmas tree device mainly use the original pressure of the formation to produce oil by self-spraying at the initial stage, and their shortcomings are ignored. , based on the accumulated experience of sucker rod pumping systems and gas lift pumping systems on land with sucker rod rotation on land all over the world, the loss of oil production with underwater tree devices may be very high. Fixed oil production platforms, floating oil production platforms, and floating mobile elevating oil production The cost of the platform is too high. The pumping system and the supporting pumping unit are economically offset by the high cost of the oil production platform, which cannot be used on a land scale. In shallow seas, earth and rocks are used to build roads Drilling and producing oil at the well site loses money economically and cannot be popularized. What causes this situation is that there is no on-land pumping unit matched with the rod pump pumping system that moves up and down the sucker rod, which can produce oil normally on the seabed

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