Trican - Well & Production Services / Cementing

Well & Production Services

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:

Annular isolation (the most important function) – provides isolation between zones in the wellbore, thereby protecting both production and fresh water zones from cross-contamination.
Casing support – a well-placed column of good quality cement helps to support the weight of the column of casing in the hole.
Casing protection – a column of cement will protect the casing from corrosion, collapse, and damage during drill out.
Abandonment – if a well is not deemed to be commercially viable, it is usually abandoned. This involves placing cement plugs across any open hydrocarbon-bearing formations, casing shoes and freshwater aquifers.
Remedial – a form of cementing that repairs casing leaks and communication between zones. This enables customers to repair a number of different problems in a well.

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