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Cementing

Primary cementing is one of the most important operations performed on a well in order to ensure complete zonal isolation and aquifer protection. Without it, the well may never reach its full production potential, and liquids from one zone could interfere with another.

After drilling a well, steel pipe called casing is inserted into the hole. Cement is pumped down this pipe and up the annulus between the pipe and the newly drilled hole. In most wells, at least two strings of casing are run: one near the surface called “surface casing” and a second across the producing zone called “production casing”. In some deeper wells, up to four strings are run. Trican cements all the casing strings in the well and will often travel to the well two to four times while it is drilled.

Trican performs the following cementing operations:

  1. Surface Casing – provides ground water protection and an attachment point for well control equipment (Blowout Preventer).
  2. Intermediate Casing – provides isolation among formations with high differential pressures.
  3. Production Casing – casing string placed across the hydrocarbon-producing zone.
  4. Liner Jobs – drilling and production liners.
  5. Cement Plugs - abandonment, whipstock, and lost circulation plugs.
  6. Remedial Jobs – retainer, braden-head and packer squeezing.

These cementing operations provide the following:

  1. Annular isolation (the most important function) - provides isolation among zones in the wellbore, thereby preventing cross contamination.
  2. Casing support – a well-placed column of good quality cement helps to support the weight of the column of casing in the hole.
  3. Casing protection – the column of cement will protect the casing from corrosion and collapse.

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