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The purpose of this paper is to study the influence of different factors on mud performance, find the best conditions and synthesize a new type of anti-collapse drilling polymer mud with higher stability. The anti-collapse mechanism of drilling polymer mud was also suggested.

Exploring the influence of different molecular weight thickeners, filtrate reducers, soda ash addition and film-forming components on the mud performance, so as to obtain the best ratio of anti-collapse drilling polymer mud.

The results show that the use of vegetable glue, sulfonate copolymer and vegetable fiber powder can synthesize a high-viscosity, high-stability, collapse-resistant mud. When the mass ratio of vegetable fiber powder: vegetable glue: sulfonate copolymer is 40:1:2, the mud viscosity is 21.2 s, the fluid loss in 30 min is only 12.5 mL, and the mud film thickness is 1.5 mm, which is one ideal anti-collapse polymer mud.

Compared with ordinary polymer mud and bentonite mud, this anti-collapse polymer mud not only uses vegetable glue instead of traditional tackifiers but also effectively uses vegetable fiber powder produced from waste wood, which is environmentally friendly and highly stable specialty. It can effectively improve the safety and quality of construction during drilling in water-sensitive geology.

The purpose of this paper is to examine knowledge and attitudes about preconception health care among Chinese immigrants in Canada.

A cross-sectional internet-based survey, informed by the principles of the health belief model, was administered to a convenience sample in Ottawa, Canada. In total, 76 respondents from the Chinese community participated in the online survey.

Overall, participants demonstrated: low to moderate awareness of preconception related risk factors and preconception health; neutral to slightly positive attitudes toward carrying out preconception care; considerable confusion over the differences among preconception care, premarital health care (Mainland China), and prenatal health care; great sensitivity to subjective norms related to spouses, parents, and friends; and a strong desire for receiving information and communication from health care professionals.

An emphasis on reducing misperceptions and offering information about the preconception period and potential severe pregnancy-related risks may contribute to a better knowledge and intended behavior toward preconception care among Chinese immigrants, and ultimately optimize both their reproductive health and their future children’s health.

The cultural norms and population policies in the sending country may frame immigrants’ knowledge and attitudes related to preconception health care. This study fills the gap in the literature regarding Chinese immigrants’ knowledge levels and attitudes toward preconception care in Canada and thus offers insights into how to deliver culturally competent care and design effective communication strategies to reach out to ethnocultural communities.