Carbon Steel Stab In Float Collar, For Well Drilling

Stab-In cementing is an improved method for cementing large diameter

casing. Conventional methods require excessive amounts of cement to

ensure cement circulation to surface because of open hole volume, losses

to the formation, or mud displacement efficiency that cannot be

determined with sufficient accuracy. In addition, large plugs must be used

to separate the cement from the mud and have to be drilled out, along

with any cement in the casing. With stab-in cementing, the Drill Pipe is

stabbed directly into the Float Shoe or Collar and cement is pumped

through the drill pipe until returns reach surface. Cement is then displaced

to the bottom of the Drill Pipe — a wiper dart can be used. The drill pipe is

then picked up, circulated, and pulled out of the hole.