Stage Cementing Collar

Features of Stage Cementing Collar

• The use of closed structure, can be achieved after the closure of a permanent self-locking.

• Open, close the action, there is no small cavity liquid compression problem.

• The inner diameter of the upper and lower fittings is the same as the inner diameter of the bushing, but less than the inner diameter of the bushing. When the bushing is operated, the bushing can be effectively protected to prevent damage.

• All attachments are made of rubber / aluminum material with good drillability, anti-rotation mechanism and convenient drilling.

• With a replacement plug open, can be used for continuous cementing operations.

Application of Stage Cementing Collar

Stage cementing collar are recommended in the following situations:

A well whose cement hydrostatic head is greater than formation pressure at some intervals but not at other intervals

Lighter cement is required in the low pressure formation to avoid formation fracture and reduce the possibility of leakage

Heavy cement is required in the high pressure formation to maintain control of the well

In deep hot holes, the time required to pump the required mass and amount of cement is limited, so it is best to keep the slurry pumpable by reducing the total volume placed in a certain interval during any particular pumping operation.

When only certain parts of the well bore require zone isolation

Under the downhole conditions requiring different slurry mixtures to address the unique challenges of each segment and achieve the desired regional isolation integrity

In horizontal wells, the bend radius of the well requires cementing

There are two types of multi-stage cementing tools to choose from: blockage (free fall) or hydraulic opening (vacuum). All Halliburton stage cementing tools operate continuously at temperatures up to 275°F (135°C).

Technical Specifications of Stage Cementing Collar