Due to conventional cementing is designed by rule of thumb, cementing quality can't be assured.
常规油井注水泥一直是凭经验进行设计，固井质量无可靠把握。
It is difficult to guarantee the cementing quantity when using conventional cementing because narrow annulus between casings.
若按照常规下套管后再注水泥，由于环形间隙小，施工难度大，难以保证固井质量。
Because foamed cement has gas and the properties of gas are the function of pressure and temperature, the conventional cementing theory can not be used in cementing with foamed cement.
由于在泡沫水泥中含有气体，其中气体参数又是温度和压力的函数，因此在固井施工设计中不能采用常规固井理论进行相关计算。
The several conventional cementing technologies for deep sea abroad were reviewed which included rapid setting gypsum slurry, PSD slurry, high alumina slurry, aerated slurry and so on.
顶替效率高。介绍了国外常见的几种深水固井水泥浆技术，包括快凝石膏水泥浆体系、PSD水泥浆技术、高铝水泥、充气水泥浆技术和其他水泥浆技术。
Cementing of the slim hole is very difficult due to its small hole size and annular clearance, and the conventional cementing technology cannot meet the requirements of field cementing.
小井眼固井由于其井眼尺寸小、环空间隙小，给固井作业带来较大困难，常规固井技术难以保证其固井质量。
The RWD is an effective means to solve sticking in complex deep wells, apply the un-conventional well profile and improve cementing quality.
RWD随钻扩眼是解决复杂深井阻卡、非常规井身结构应用和提高固井质量的有效手段。
Conventional accelerating agents for deepwater cementing are often inorganic salts, which bring a lot of reaction heat that threats the stability of the hydrate in deepwater.
常规的用于深水固井的水泥浆促凝剂多为无机盐类，给水泥浆带来大量的反应热，威胁到水合物层的稳定性。
Conventional accelerating agents for deepwater cementing are often inorganic salts, which bring a lot of reaction heat that threats the stability of the hydrate in deepwater.
常规的用于深水固井的水泥浆促凝剂多为无机盐类，给水泥浆带来大量的反应热，威胁到水合物层的稳定性。
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