Stab-in Casing Float Collar And Float Shoe API or As required
The technique known as the stab-in float collar and shoe is a
highly efficient method for cementing large diameter casings. In
this approach, the drill pipe is inserted directly into either the
float shoe or collar. Cement is then pumped through the drill pipe
until the returns reach the surface. Subsequently, a wiper dart is
used to displace the cement to the bottom of the drill pipe. The
drill pipe is then circulated, retrieved, and removed from the
wellbore.
Moreover, the use of oversized plugs is necessary during cementing
to separate the cement from the mud and to drill out any cement in
the casing. The stab-in float collar and shoe technique is
specifically designed for cementing large diameter casings that are
lowered using drill pipe. This method requires special
considerations due to the high displacement volumes associated with
this particular operation.
Features of float collar and float shoe:
- Small diameter inner string off drill pipe is used to displace
cement which minimizes displacement volume behind Cement and there
by reduces contamination and save time.
- Drill out of cement inside large casing is minimized by controlling
cement top with displacement fluid in drill pipe And Plunger valve
in Stab in Shoe
- Improve displacement accuracy — cement mixing and pumping continues
until cement returns reach surface
- Get better cement quality — the reduced cement/mud interface area
and high velocity of flow in the Drill
- Pipe Minimize cement contamination while the short pumping time
eliminates the need for cement retarders
- Reduce cement volume — conventional displacement requires
calculation of excess cement factor, whereas with Stab-in methods
excess cement need be no greater than the volume of the drill pipe.
No large plugs are needed
- Reduce net rig time — circulating, pumping, and drill-out times are
minimized
- Protect casing — cementing pressures are confined to the drill pipe
as in a squeeze job
- The Stab-in cementing equipment is available in size 4-1/2”-36”
- The Stab-in cement Float Shoe & Collar are also available with
Double Valve and any combination.
Specification of float collar and float shoe:
Specification (in) | O.D. (mm) | Total Length | I.D. (mm) | Min.Dia. (mm) | Connection Type | Working Pressure |
Float Collar | 5" | 141.3 | 500 | 110 | 50 | BTC/LTC/BCSG | 35 |
5 1/2" | 153.67 | 530 | 112 | 55 | BTC/LTC/BCSG | 35 |
7" | 194.46 | 586 | 162.5 | 77 | BTC/LTC/BCSG | 35 |
9 5/8" | 270 | 720 | 225 | 77 | BTC/LTC/BCSG | 35 |
13 3/8" | 365 | 720 | 319 | 77 | BTC/LTC/BCSG | 35 |
20" | 533.4 | 720 | 475 | 77 | BTC/LTC/BCSG | 35 |
Float Shoe | 5" | 140.3 | 495 | 110 | 50 | BTC/LTC/BCSG | 35 |
5 1/2" | 153.67 | 514 | 112 | 55 | BTC/LTC/BCSG | 35 |
7" | 194.46 | 533 | 162.5 | 77 | BTC/LTC/BCSG | 35 |
9 5/8" | 269.88 | 550 | 225 | 77 | BTC/LTC/BCSG | 35 |
13 3/8" | 339.7 | 550 | 319 | 77 | BTC/LTC/BCSG | 35 |
20" | 534 | 652 | 475 | 77 | BTC/LTC/BCSG | 35 |
Company Information
Puyang Zhongshi Group Co., Ltd is a professional manufacturer of
various oilfield equipments and cementing accessories since 1997, restructured enterprise of SINOPEC. Our
group have 10 years export experience and 9 subsidiary factories,
more than 500 employees. We are the first-class supplier of
resources market of SINOPEC and CNPC.
Puyang Zhongshi Group Co., Ltd have the certificates of API 5CT, API 10D, API 11E, API 6A, API
11AX, ISO 9001 and ISO 14001. Our foreign customers are mainly from America, Central Asia, Russia, Southeast
Asia, Middle East, etc.