PACKERS

Collar cementing packer PMC, PMC-R

Collar Cementing Packer PMC is applied to ensure separation for cemented and noncemented casing string parts (liner) during collar cementing. The packer is used together with collar cementing
valve KMC.
The packer is produced in two designs, PMC and PMC-R that differ in the type of a sealing element:

in PMC a sealing element consists of three sealing rings;
in PMC-R a sealing element is a rubberized fabric hose.

The packer is actuated before cementing by a ball-drop and its pumping until setting down a seat
inside the packer. This leads to the deformation of a sealing element and packing of annular space
between the walls of a well and a casing string (liner).
The packer is equipped with a trip valve which ensures RIH without overflow.

PARAMETER DESCRIPTION	VALUE
PARAMETER DESCRIPTION	PMC.102	PMC-R.102 (PMCU-R.102)
Outer diameter, mm	118
Drift diameter, after actuation, mm	88
Length of the well zone overlapped by a packer sealing element, mm	280	2800 (1200)
Packer setting coefficient: - nominal - maximum	1,06 1,29	1,11 1,3
Maximum pressure differential between the isolated zones at nominal packer setting coefficient, MPa	15
Maximum internal overpressure on the packer body, MPa	25
Maximum tensile axial force on the packer body1 , kN	600
Maximum operating temperature² , °C	100
Length, not more: - in operating position, mm	1416	4991 (3291)
Weight, not more: - in operating position, kg	45	104 (91)
Reliability coefficient, not less	0,95

1
Calculated value when stresses reach yield point of the material.
2
Reference only, depends on operating conditions of general mechanical rubber goods in a well.