API T95 Stab in Single Valve Float Collar TPQR Connection
Stab in Single valve float collar produced as per the API 5B thread or premium thread available,Internal cement filling, using high sulfur resistant oil well cement, with good drillability and erosion resistance.
The upper part of the single flow valve is equipped with an anti rotating disc and a rubber plug, all of which are drillable materials. The body is made of phenolic resin, and the spring is made of tin bronze. The overall performance meets the requirements of API specification.
During the process of running the casing, the blind plate inside the float collar acts as a temporary blockage, filling the casing column below it with air and improving the efficiency of running the casing.
After the casing is inserted into the designated position, the wellhead is pressurized, and the blind plate is crushed into small particles with a diameter of less than 10mm, establishing a circulation channel.
The particles circulate out of the casing with the drilling fluid.
Operating procedures
1. Carefully inspect the full bore float collar and its accessories, check that the appearance of the float collar is not bumped, and whether the blind plate is intact; Whether the connecting thread matches the casing.
2. Lower the float shoes and float hoops in sequence, connect the casing, and no grouting is required inside the casing. Pay attention to controlling the lowering speed.
3. Connect the float collar at the design position and grout the casing. Pay attention to controlling the speed and grouting frequency below the casing, especially when approaching the design position,
to control the lowering speed of the casing and prevent the float collar from opening prematurely.
4. After the casing is in place, the casing is filled with mud, the wellhead is pressurized, the float collar is opened, and circulation is established.
5. After the circulation is normal, carry out the cement injection operation. After the cement is completed, put in the rubber plug, pump in the plug fluid, and then replace it with mud until it hits the pressure.
Complete the cementing operation.
