Oil drilling and workover engineering is one of the indispensable links in the process of oil exploration and production. Next, we will introduce various technologies in oil drilling and workover engineering from different perspectives. The first is the wellbore quality control technology, which is an important indicator to measure the effectiveness of oil drilling and workover projects. High quality wellbore can improve drilling safety and workover efficiency. In terms of the control in wellbore quality, it mainly involves technologies such as the control of drilling fluid, the selections of bottom hole hydraulic pressure and drilling tools and stress control. Through advanced technical means, the stability of the wellbore during the drilling process can be ensured and losses caused by problems such as wellbore collapse can be effectively reduced.

The second is drilling fluid technology, which plays an important role in oil drilling and workover engineering. It is not only a medium for transmitting power and cooling the drill bit, but also an important method to remove drilling cuttings and prevent wellbore collapse. This technology mainly includes formula design, performance testing and comprehensive evaluation. Scientific and reasonable drilling fluid technology can effectively improve drilling efficiency and wellbore quality and reduce environmental pollution. The third is well logging technology, an important part of the drilling stage. By measuring and analyzing parameters such as the lithology of the well wall, formation thickness and porosity, it can help petroleum engineers more accurately know the conditions of the formation around the wellbore, and provide a basis for subsequent improvement of the wellbore structure and confirmation oil and gas reserves. Logging technology mainly includes various technical means such as electrical logging, acoustic logging and nuclear logging. The application of these technical means can improve the success rate of drilling and optimize the completion plan.

The fourth is well wall integrity protection technology, which refers to taking measures to protect the well wall from damage and pollution during drilling and workover. It mainly includes the cementing technology, plunger technology and salt water perforation technology. The application of these technical means can ensure the integrity of the wellbore, prevent the leakage of downhole water and formation oil and water, and improve the stability of the wellbore and promote oil production. The fifth is the environmental protection technology in oil field, which is an essential part of oil drilling and workover engineering. Through reasonable technical means, it can reduce environmental pollution and well waste emissions and the oilfield ecological environment can be protected. These methods include cementing waste liquid treatment, wellhead oil and gas recovery, and rational utilization of well waste. The application of these technologies can reduce environmental pollution and also help increase the recovery rate and productivity effect of oil and gas resources.

In conclusion, oil drilling and workover engineering contains plentiful technologies. With these technologies interwoven with each other, including the wellbore quality control, drilling fluid technology, well logging technology, well wall integrity protection and oil field environmental protection, the smooth progress of oil drilling and workover projects can be ensured and the efficiency and effectiveness of oil exploration and production can be improved.