A vacuum oil injection method using a vacuum oil injection device for oil drilling

Abstract

The invention discloses a vacuum oil filling realization method adopting a vacuum oil filling device for petroleum drilling. A device main body comprises a circulation system, a vacuum system, an automatic control system and a vacuum pressure balance pipeline. The method mainly comprises the following steps: starting a vacuum pump through software, and carrying out adequate circulating vacuumizingon hydraulic oil according to a vacuum degree requirement at first; after a vacuum degree meets the requirement, connecting oil filling pipelines and oil return pipelines of a hydraulic module and the balance pipeline, and carrying out oil filling preparation; closing a stop valve, vacuumizing the hydraulic module through a part of the oil filling pipelines and the oil return pipelines, and the balance pipeline, and enabling the vacuum degree to reach 0.5mBar and below; and opening the stop valve, starting an oil filling pump through computer software, and carrying out oil filling according to automatic control of the computer control software. Firstly, the vacuum oil filling realization method adopting the vacuum oil filling device for petroleum drilling meets the requirement of vacuum oil filling for the rotary-guide hydraulic module; secondly, the method realizes the requirements of pressure balance and automatic control in an oil filling process; and thirdly, the method realizes the vacuum degree requirement of oil filling.

Description

technical field [0001] The design of the present invention relates to the technical field of measuring instruments while drilling, in particular to a vacuum oiling method used in a ground vacuum oiling device for oil drilling rotary steering tools. Background technique [0002] The rotary steerable drilling system is a cutting-edge automatic drilling technology, which has become an essential technology for complex ultra-deep directional wells and extended-reach horizontal wells. It can effectively reduce the occurrence of drag torque and downhole complex situations, and improve drilling capabilities . As one of the types, the push-by rotary steerable drilling system has also been applied in large-scale engineering without exception. Among them, the hydraulic module is the key component to realize the reliable application of the push-on rotary steerable steering system. Its main function is to complete the actions of the steering commands, and to guide according to the steer...

AI Technical Summary

Problems solved by technology

In order to ensure that the hydraulic module successfully completes the guidance command, the stability and reliability of the hydraulic module must be guaranteed. In addition to the performance of the accessories, the stability and reliability of the hydraulic module also depends on the vacuum degree of the hydraulic oil injected. The oil injection method is basically to start the oil injection after vacuuming the whole system at room temperature, but in fact the oil itself will be mixed with a lot of gas. Only the system is vacuumed, and the air bubbles in the oil cannot be effectively discharged. This is an urgent need for traditional oil injection. a problem solved

Images