7-Inch Well Casing: The Rugged Guardian of Deep-Sea Drilling

As deep-sea drilling technology continues to advance, 7-inch well casing, a core component in this field, is becoming more and more widely used. However, the uniqueness and complexity of the deepwater environment presents unprecedented challenges for 7-inch well casing. This paper will discuss these challenges in depth and present a series of innovative solutions.

The challenges of the deep sea environment

Deep sea drilling, like exploring the unknown universe, is full of challenges at every step. The pressure of the deep sea is huge, which puts forward high requirements on the pressure resistance of well casing. Meanwhile, corrosive substances in the deep sea are like invisible enemies, constantly eroding the well casing and affecting its performance. In addition, during deep sea drilling, well casing also needs to withstand impacts from various complex stresses and vibrations, all of which pose a threat to the safety and reliability of well casing.

Solutions for 7-inch well casing

Material innovation and breakthrough

In order to cope with the challenges of the deep sea environment, 7-inch well casing has made innovations in material selection. High-strength, corrosion-resistant alloy materials, such as titanium alloy and stainless steel, are used to provide solid protection for the well casing. Meanwhile, the corrosion and wear resistance of the well casing is further enhanced by the application of advanced technologies such as nano-coating.

Design optimisation and upgrading

In terms of design, the 7-inch well casing has also been optimised and upgraded. By adjusting the wall thickness and shape of the well casing, the 7-inch well casing is more adaptable to the deep-sea environment, improving its stability and stress resistance. At the same time, the connection strength and sealing performance of the 7-inch well casing were strengthened to ensure its safety and reliability during deep sea drilling.

Real-time monitoring and careful maintenance

Deep sea drilling is a continuous process, and monitoring and maintenance of well casing is crucial. By installing advanced sensors and monitoring equipment, the performance status of 7-inch well casing can be grasped in real time, and problems can be found and solved in time. At the same time, regular maintenance and servicing of 7-inch well casing can extend its service life and ensure that it continues to provide stable support for deep sea drilling.

Saigao has a specialised production line for the entire process of iron, steel, pipe and deep processing. The company's oil casing pipe products not only cover all steel grades and thread types of API SPEC 5CT standards, including flat end oil casings. At the same time, according to the individual needs of the market and customers, the company independently developed a series of non-API standard series of oil jackets. Pipe products, including steel grade and thread type, form HS series oil casings with independent intellectual property rights, enriching the specifications of domestic oil casings, providing a variety of choices for different oil and gas fields development and use needs.