Intelligent driving device for oil-well pump and winding type pumping unit system

Abstract

The invention belongs to the field of oil extraction equipment in the oil field and especially relates to an intelligent driving device for an oil-well pump and a winding type pumping unit system. The intelligent driving device comprises a motor, a speed reducer, a winch, a wellhead bracket, a sucker rod and a frequency converting control device, wherein the sucker rod is divided into two sections which are respectively called as an upper sucker rod section and a lower sucker rod section; the two sucker rod sections are connected with each other through a sucker rod joint; the upper sucker rod section is arranged as a glass fiber rod; the lower sucker rod section is arranged as a steel sucker rod or a carbon fiber rod; communication cables and ribbon heaters are arranged in both of the upper sucker rod section and the lower sucker rod section; the communication cables and the ribbon heaters are butt-jointed through an electric connector at the sucker rod joint; the communication cables and the ribbon heaters are arranged in both of the upper sucker rod section and the lower sucker rod section. A flexible sucker rod in the intelligent driving device has a two-section type structure; the upper sucker rod section is made of a glass fiber rod with the minimal bending radius being less than that of the other material; compared with a carbon fiber rod, the glass fiber rod has the minimal bending radius which can reach about 0.5 m, so that the size of the winch can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of oil production equipment in oilfields, and in particular relates to an intelligent driving device for an oil well pump and a winch type oil pumping unit system. Background technique [0002] The pumping unit is a commonly used oil production equipment in the oil production process. During oil production, the pumping unit drives the downhole pump rod to reciprocate up and down through the sucker rod, so as to pump the oil and other liquids in the formation to the ground. Most of the existing pumping units are beam pumping units. Due to the limitation of the structure, the stroke of this type of pumping unit is relatively short and the number of strokes is high, so the mechanical efficiency is low and the energy consumption per unit output is large. In order to further reduce energy consumption and improve production efficiency, an invention patent with the application number CN201010299647.0 discloses an intelligent...

AI Technical Summary

Problems solved by technology

However, due to the relatively poor adhesion strength of steel wires to plastics and hot melt adhesives, this new type of steel wire rope will have the problem of separation between steel wires and plastics or steel wires and hot melt adhesives after a period of use, and then the problem of poor sealing will occur again.

[0005] 2. The wear resistance of the steel wire rope is poor and the service life is short, so it needs to be replaced frequently. Moreover, the worn steel wire rope cannot be repaired and used again, but can only be scrapped. Therefore, when the steel wire rope is used, the maintenance cost of the equipment is relatively high

[0006] 3. The density of the steel wire rope is relatively high, so the requirements for the dynamic performance of the equipment are relatively high, and the energy consumption is also relatively large

[0007] 4. During production, it is often necessary to communicate with underground electronic equipment (sensors, testing instruments, etc.) on the ground. Since the existing sucker rod itself cannot realize this function, when testing, the sucker rod can only be lifted first. out, and then run the test cables and test instruments into the well. This method is not only cumbersome in the test process, but also must be carried out in a shutdown state, which will affect the normal production;

[0008] 5. During use, a large amount of wax will be deposited on the surface of the sucker rod, which will adversely affect the production

Therefore, the disassembly process is more cumbersome

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