Improves Cement Bond for Well Cementing

Excellent Bonding Additives
Between Casing, the Set Cement and the Formation

Good bonding between casing, the set cement and the formation is vital for effective zonal isolation.

It is well known that microannuli along the casing/cement interface evolves with time which causes poor zonal isolation. Conventional cements are not effective in addressing it. Studies indicated that the cement sheath can actually expand away from the casing during life cycle of a well.
Expanding agents in cements are used to allow particular expansion ratio in the set cement occurs to improve cement inerface/casing or formation bonding.

Cement systems that expand slightly after setting are a proven means of sealing microannuli and improving primary cementing results. The improved bonding is the result of mechanical resistance or tightening of the cement against the pipe and formation.

Optimize Zonal Isolation

Expansive cements expand slightly after the cement is set. This can help promote bonding integrity between cement and the casing and the formation for zonal isolation throughout the life of the well to provide the following benefits:

  • Control gas migration
  • Protect casing from corrosive conditions
  • Eliminate communication between fracture/stimulation treatments
  • Reduce or eliminate unwanted fluid production (water or gas)
  • Help sustain wellbore integrity

Our Bonding Additives

Our Bonding Additives helps control micro-channels, which provide a pathway for inter-zonal  communication. The expansion provided by Bonding additive develops as a function of temperature, which accelerates expansion.

Product Name Description
DosBond™ 10 DosBond™ 10 is based on chemical blend that provides expansion in oilfield cements.
DosBond™ 30 DosBond™ 30 is a chemical mixture that improves bonding and zonal isolation.

Improved Expansion

DosBond™ 10 was tested with cement slurries at density of 16 Ibm/gal.
At ambient temperature, expansion ratio of 0.5% depending on the concentration used and remain more or less constant after 6 months of curing.