With the growth of deep drilling and the complexity of the well profile, the requirements for a
more complete and efficient exploitation of productive formations increase, which increases …

In recent years, more deep and ultra-deep gas and oil wells have been drilled. The high-
temperature and high-pressure (HPHT) conditions encountered in such wells frequently …

During the drilling of deep/ultradeep wells, water-based drilling fluids (WBDFs) often
experience harsh conditions of ultrahigh temperature and high salt. Ultrahigh temperatures …

A type of natural resource found in nature, starch and its derivatives, homologues, and other
compounds have a wide range of sources. These materials are cheap to obtain and have …

When drilling deep wells, it is important to regulate the formation pressure and prevent kicks.
This is achieved by controlling the equivalent circulation density (ECD), which becomes …

In deep and ultra-deep well drilling, ultra-high temperatures and high salt lead to poor
drilling fluid performance. In this study, N, N-dimethylacrylamide (DMAA) …

The use of different types of chemicals in upstream oilfield operations is critical for optimizing
the different operations involved in hydrocarbon exploration and production. Surfactants are …

The main challenge in deviated and horizontal well drilling is hole cleaning, which involves
the removal of drill cuttings and maintaining a clean borehole. Insufficient hole cleaning can …

Drilling operations conducted under high-pressure and high-temperature conditions present
significant challenges for modern drilling advancements. Downhole temperatures can …

The polyanionic copolymer fluid loss additive (PSADM) intercalated hydrotalcite sustained
release-type fluid loss additive (PSADM–LDH) was fabricated through in situ intercalation …