17549420. CEMENTING A WELLBORE CASING simplified abstract (Saudi Arabian Oil Company)

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CEMENTING A WELLBORE CASING

Organization Name

Saudi Arabian Oil Company

Inventor(s)

Ahmed Al-mousa of Dhahran (SA)

CEMENTING A WELLBORE CASING - A simplified explanation of the abstract

This abstract first appeared for US patent application 17549420 titled 'CEMENTING A WELLBORE CASING

Simplified Explanation

The patent application describes a method of cementing a casing in a wellbore using a wiper plug assembly.

  • The casing, which consists of multiple pipes with progressively smaller diameters, is lowered into the wellbore.
  • Cement is then flowed into the casing.
  • A wiper plug assembly, consisting of a hollow wiper plug and a solid wiper plug, is deployed in the casing upstream of the cement.
  • Fluidic pressure is applied to push down the cement with the wiper plug assembly.
  • The hollow wiper plug reaches and is retained at the transition point where a first pipe overlaps a second pipe.
  • The solid wiper plug is released from the hollow wiper plug and flows downhole in the casing.
  • The solid wiper plug pushes the cement out of the casing to the downhole end of the casing.

Potential applications of this technology:

  • Oil and gas well drilling and completion operations.
  • Cementing casings in wellbores to provide structural integrity and prevent fluid migration.

Problems solved by this technology:

  • Ensures proper placement and distribution of cement in the casing.
  • Facilitates the cementing process in wellbores with multiple pipes and transition points.

Benefits of this technology:

  • Improved cementing efficiency and effectiveness.
  • Reduces the risk of cementing failures and associated well integrity issues.
  • Enhances the overall performance and safety of wellbore operations.


Original Abstract Submitted

A method of cementing a casing in a wellbore includes lowering the casing in the wellbore. The casing includes multiple pipes each of progressively smaller diameters, and a transition point where a first pipe overlaps a second pipe. The method also includes flowing cement into the casing and deploying, by fluidic pressure, a wiper plug assembly in the casing upstream of the cement to push downhole the cement with the wiper plug assembly. The wiper plug assembly includes a hollow wiper plug and a solid wiper plug releasably coupled to the hollow wiper plug. The deploying includes applying fluidic pressure until the hollow wiper plug reaches and is retained at the transition point and the solid wiper plug is released from the hollow wiper plug to flow downhole in the casing to a downhole end of the casing and push the cement out of the casing.

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