‌RockySea Petro Float Collar and Float

Data sheet

Advantage

RockySea has extensive experience in manufacturing float hoops and shoes, and its products have the following advantages.

1) The reliable valve body structure reduces the resistance of cement slurry flow.

2) All internal accessories are drillable and have the same diameter as the casing.

3) The special structural design effectively prevents the backflow of cement slurry.

4) The buckle can be processed into BTC/LTC/STC/VAM/FOX/TP-CQ/OTTM according to customer requirements.

Application

The float collar and float shoe are mainly used to guide the casing string into the well smoothly, adjust the buoyancy force on the casing string when running the casing, prevent the cement slurry from flowing back into the casing through the back pressure valve, accurately control the height of the cement plug inside the casing during cementing, and ensure the quality of cementing. Float hoops and float shoes are generally used in sets, with the float shoe located at the bottom of the casing and 1-2 sleeves separated between the float hoops and float shoes.

Principle

The floating hoop structure is basically the same as the floating shoe, except that its lower end is a male buckle connected to the casing. The floating shoe body is made of alloy structural steel material, with the upper end connected to the casing and the lower end made of hemispherical cement or metal head, used to guide the casing down. It is equipped with a backpressure valve inside, which can be drilled with a PDC drill bit. The upper and lower channels of the valve are open when leaving the factory. When the casing is first inserted, the liquid in the well has no resistance to the float shoe. The pressure of circulating mud will push the valve head down by one displacement, and the three flaps at the end of the valve stem will automatically fall off. After stopping the pump, the valve will press the valve seat upwards under the action of the spring, acting as a one-way valve. At this point, drilling fluid or cement slurry can be pumped in from top to bottom, but the liquid inside the casing under the valve or in the annular space outside the casing cannot return.

Description

Floating collar is a casing coupling equipped with a single flow valve, which belongs to one of the casing accessories. Structurally, it is divided into two types: nylon ball float collar and spherical steel valve float collar. The former is used for shallow wells, while the latter is used for deep well.

In deep wells and special wells, it can be combined with casing float shoes to improve the safety of cementing operations. During the process of running casing, achieving unidirectional flow of drilling fluid in the annulus can prevent cement slurry backflow during the cementing process and achieve pressure relief and waiting for setting after cementing collision, which helps to improve the bonding quality between the cement sheath and casing; At the same time, by injecting drilling fluid into the casing string to adjust its buoyancy, the suspended weight of the casing meets the design requirements for casing operation.

RockySea Petro: A Pioneer in Float collar and Float shoe Manufacturing in China

The float collar and float shoe are mainly used to guide the casing string into the well smoothly, adjust the buoyancy force on the casing string when running the casing, prevent the cement slurry from flowing back into the casing through the back pressure valve, accurately control the height of the cement plug inside the casing during cementing, and ensure the quality of cementing.

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