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HomeCatalogLiner HangersProtected cemented liner hanger PHCZ

Liner Hangers

Protected cemented liner hanger PHCZ

The PHCZ liner hanger is used to RIH and hang cemented liners and allows to sequentially perform well cementing operations, set hydraulic anchor, packer and, then, disconnect a drill string.

PHCZ liner hanger can be used in vertical, deviated, sub horizontal and horizontal wells, where it is required to run and cement a liner. PHCZ liner hanger consists of four functionally independent components:

  • anchor to hang the liner assembly in the casing string;
  • hydro-mechanical packer to isolate annular space;
  • hydraulic release mechanism that allows to RIH liner assembly, circulate, activate anchor/ packer by hydraulic pressure and, then, disconnect the drill string from PHCZ by applying hydraulic pressure;
  • mechanical release to back up a hydraulic disconnection.

After the liner is run to the bottom and required circulations (washovers) are carried out, PHCZ activation is carried out as follows:

  • cement is pumped into a well and cement plug is lunched to separate it from displacement fluid;
  • cement slurry is displaced into the liner-open hole annular space until the plug “bumps”;
  • while well head pressure “on bump” increases, the hydraulic anchor gets set when pressure differential reaches 16 MPa. The pressure is passed through a hollow pin to the inner space of anchor’s fluid drive, which moves slips radially to latch on casing walls;
  • hydraulic packer is activated simultaneously with anchor by differential pressure of 16 MPa. The pressure activates packer’s fluid drive, which creates force to a plunger sleeve to cut the shear pins and start moving while squeezing rubber seals split by centralizer: the seals deform and press against casing walls;
  • when pressure differential reaches 20 MPa, the hydraulic disconnection device gets activated. The pressure on plunger creates force required to cut shear pins and move to release arresters, thus disconnecting the drill string from hanger;
  • in case of problems with hydraulic release mechanism, the mechanical disconnection is activated by, first, adjusting weight indicator reading to the weight of the drill string in fluid and, second, rotating the drill string by 20 turns clockwise (to the right);
  • circulation/washover is performed and drill pipe is POOH.

Depending on cementing job type required, the hanger/liner system is equipped with: for the “bottom up” liner cementing: The first liner pipe is equipped with a plug catcher, check valve and casing shoe. PHCZ is connected to the last liner pipe. for liner top cementing The first liner pipe is equipped with a shoe, the last liner pipe (in productive zone) is equipped with packer, such as PGMC, PGMC2 or PGMC4. PHCZ is connected to the last liner pipe.

PARAMETER DESCRIPTION VALUE
PHCZ.89/140-76 PHCZ1.102/146 PHCZ1.114/168
Liner nominal OD, mm 89 102 114
Casing OD, recommended wall thickness, (ID) of casing to use PHCZ, mm 139,7
*9,2
(121,3)		 146,1
*7,7
(130,7)		 168,3
*8,9
(150,5)
Maximum OD (at centralizer), mm 111 (114) 120 (122) 138 (141)
Drift ID after activation, mm 76 89 99
Maximum casing ID, where anchoring can be performed, mm 128 137 155
Values of differential activation pressures1 , MPa
– anchor
– packer
– hydraulic disconnection device		 16
16
20
Maximum pressure differential on packer, MPa 15
Maximum operating temperature2 , °C 100
Maximum axial tensile load on hanger body parts3 , kN 600 600 700
Connecting threads4 :
– top GOST 28487 (GOST R 50864)
– bottom GOST 632-80		 З-86
89		 З-86
ОТТМ 102		 З-102
ОТТМ 114
Length in operating position, mm 3361 3788 3757
Weight in operating position, kg 107 140 174,4

1 The values are given for all shear pins installed.

2 For reference only! – depends on operating conditions for rubber parts in a well.

3 Calculated value when stresses reach tensile yield of the material.

4 For PHCZ.89/140-76 bottom thread is made accordingly to GOST 633. For PHCZ.102/140-80/117, PHCZ1.102/146, PHCZ1.114/168- 102, PHCZ1.127/178-102 thread OTTM-102 is made accordingly to TR 14-161-163.

PARAMETER DESCRIPTION VALUE
PHCZ1. 114/168-102 PHCZ1. 127/178 PHCZ1. 127/178-114 PHCZ1. 127/178-102
Liner nominal OD, mm 102 127 114 102
Casing OD, recommended wall thickness, (ID) of casing to use PHCZ, mm 168,3 *8,9 (150,5) 177,8 *10,4 (157)
Maximum OD (at centralizer), mm 138 (141) 149 (152)
Drift ID after activation, mm 89 111 99 89
Maximum casing ID, where anchoring can be performed, mm 155 167
Values of differential activation pressures1 , MPa
– anchor
– packer
– hydraulic disconnection device		 16
16
20
Maximum differential pressure on packer, MPa 15
Maximum operating temperature2 , °C 100
Maximum axial tensile load on hanger body parts3 , kN 600 800 700 600
Connecting threads4 :
– top GOST 28487 (GOST R 50864)
– bottom GOST 632-80		 З-102
ОТТМ 102		 З-102
ОТТМ 127		 З-102
ОТТМ 114		 З-102
ОТТМ 102
Length in operating position, mm 3757 3678 3775 3765
Weight in operating position, kg 174,4 187 187 180,4

1 The values are given for all shear pins installed.
2 For reference only! – depends on operating conditions for rubber parts in a well.
3 Calculated value when stresses reach tensile yield of the material.
4 For PHCZ.89/140-76 bottom thread is in line with GOST 633. For PHCZ.102/140-80/117, PHCZ1.102/146, PHCZ1.114/168-102, PHCZ1.127/178-102 thread OTTM-102 is in line with to TR 14-161-163.