Volume 38 Issue 6
Nov.  2021
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CHEN Debao, KANG Jufeng.An instantly prepared cementing spacer of high density[J]. Drilling Fluid & Completion Fluid，2021, 38（6）：778-781 doi: 10.12358/j.issn.1001-5620.2021.06.019
Citation: CHEN Debao, KANG Jufeng.An instantly prepared cementing spacer of high density[J]. Drilling Fluid & Completion Fluid，2021, 38（6）：778-781 doi: 10.12358/j.issn.1001-5620.2021.06.019
shu

An Instantly Prepared Cementing Spacer of High Density

doi: 10.12358/j.issn.1001-5620.2021.06.019
  • 1.

    Drilling Engineering and Technology Research Institute of Daqing Exploratory Drilling Corporation,Daqing, Heilongjiang 163413

  • 2.

    Second Drilling Company of Daqing Exploratory Drilling Corporation,Daqing,Heilongjiang 163413

  • Received Date: 2021-06-29
  • Publish Date: 2021-11-30
    Abstract
  • In order to meet the needs of instant prepared process and solve the problem of viscosity of high density isolating fluid, an integrated treatment agent DQ-SA for spacer was developed, which is mainly composed of surfactant modified biological glue. The weak hydrogen bond of biological glue molecules is broken and the surfactant micelles are arranged directionally when stressed, The base solution of spacer prepared with DQ-SA has obvious shear dilution characteristics. The viscosity of Markovian funnel is only 31s and shows excellent flow performance. At the same time, the simulation experiment of instant prepared is carried out with indoor equipment, the mixing capacity of cementing truck is concluded, and the specific parameters of indoor simulating equipment are determined． Through the laboratory experiment, the balance between the fluidity and stability of the spacer was achieved, and the optimum dosage of the integrated agent was determined. By controlling the proportion of weighting agent, the density of the spacer can be adjusted in a wide range up to 2.40 g/cm3. The evaluation shows that instant prepared spacer has good fluidity, stability, compatibility and temperature resistance. The ground and field tests show that the instant prepared process is easy to operate, the spacer prepared is excellent, and the problems of high density isolating liquid are well solved.

     

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