Plugs For Wells Without Landing Nipples
Monolock® Plug • Belleville spring energy storage
system provides positive sealing
The Halliburton Monolock® plug is during pressure reversals
designed to be set anywhere in a given
size of tubing, casing, or liner. The • Can be installed and retrieved
Monolock plug differs from a through restrictions
conventional lock mandrel because it • Run and retrieved on same
does not require either a profile or DPU unit
sealbore in the tubing string and is • Run on slickline, braided line, or
retained in its set position by slips coiled tubing
rather than keys. The Monolock plug
may be used in association with the • Element located above slips,
Halliburton full bore nipple system preventing any debris accumulation
or any other selective or nipple and around slip area
lock system. • Equalizing feature provided in
standard assembly
The plug is set and retrieved with • Barrel-slip design provides
Halliburton’s DPU® running and maximum slip engagement while
retrieving tools, which can be run on minimizing tubing deformation
slickline, braided line, or coiled tubing.
When used for plugging applications, Benefits
the plug is designed to withstand
• Can be set anywhere in tubing,
differential pressure of up to 10,000 psi
casing, or liner
(690 bar) from either direction.
• Quick running and retrieval
Applications • Use of slickline rather than
• As a retrievable bridge plug placed conductor line lowers installation
anywhere in the tubing string and retrieval costs
• Can be adapted to install BHP • Redressable in field, reducing
gauges and other flow control downtime
devices • Because element returns to original
• Plug tubing below hanger for well shape, assembly can be recovered
repairs back through restrictions
• Slip configuration helps ensure
Features centralized lock setting even in
• Pressure ratings up to 10,000 psi high-angle or horizontal wells
(690 bar) • Provides same reliability as
• Requires no landing receptacle production packers
• Seals against pipe ID • Slip design minimizes tubing
• Slip-type anchor system deformation
HAL10466
• Element is retracted during retrieval
Monolock®
Plug
Subsurface Flow Control Systems
Monolock® Plug
Tubing/ Casing Nominal Minimum Maximum Fish Neck Pressure Temp.
Drift ID Element
Casing Size Weight ID Nipple ID OD ID Rating Rating
in. mm lb/ft kg/m in. mm in. mm in. mm in. mm in. mm in. mm psi bar °F °C
9.3 13.82 2.992 76 2.867 72.82 2.813 71.5 2.78 70.61
3 1/2 88.90 1.81 45.97 1.18 29.97 7,500 516.75
10.3 15.36 2.922 74.22 2.797 71.84 2.750 69.85 2.73 69.34
12.6 18.79 3.958 100.53 3.833 97.36 3.813 96.85 3.78 96.01 6,740 464.71
13.5 20.09 3.920 99.57 3.795 96.39 7,730 532.96
4 1/2 114.30 3.688 93.68 3.66 92.96 1.38 35.05 1.38 35.05
15.5 23.06 3.826 97.18 3.701 94.01 8,990 619.84
16.9 25.15 3.790 96.27 3.615 91.82 3.630 92.20 3.59 91.19 10,000 689.48
5 127.00 18 26.79 4.276 108.61 4.151 105.44 4.000 101.60 3.97 100.84 1.38 35.05 1.38 35.05 8,200 565.38
15.5 23.06 4.950 125.73 4.825 122.56 5,600 386.21
4.691 119.08 4.66 118.36 1.81 45.97 1.75 44.45
17 25.30 4.892 124.26 4.767 121.08 6,190 426.79
5 1/2 139.70
20 29.76 4.778 121.36 4.653 118.19 7,350 506.77
4.562 115.87 4.53 115.06 1.81 45.97 1.75 44.45
23 34.23 4.670 118.62 4.545 115.44 8,450 582.61
HNBR or
23 34.23 6.366 161.70 6.241 158.52 5,080 350.25 250 121 Nitrile
26 38.69 6.276 159.41 6.151 156.24 6.000 152.40 5.97 151.64 5,790 399.21
29 43.16 6.184 157.07 6.059 153.90 6,530 450.23
26 38.69 6.276 159.41 6.151 156.24 5,790 399.21
29 43.16 6.184 157.07 6.059 153.90 5.963 151.46 5.92 150.37 2.31 58.67 2.31 58.67 6,530 450.23
32 47.62 6.094 154.79 5.969 151.61 7,200 496.42
7 177.80
29 43.16 6.184 157.07 6.059 153.90 6,530 450.23
32 47.62 6.094 154.79 5.969 151.61 5.875 149.23 5.84 148.34
35 52.09 6.004 152.50 5.879 149.33
32 47.62 6.094 154.79 5.969 151.61 7,200 496.42
35 52.09 6.004 152.50 5.879 149.33 5.750 146.05 5.72 145.29 2.62 66.55 2.62 66.55
38 56.55 5.920 150.31 5.795 147.19
Pressure rating listed is based on use in 80K tubing/casing. See Design Specification for rating when used in other weights or grades of tubing/casing.
Ordering Information
Specify: tubing size, weight, and grade; service environment (standard, %H2S, %CO2, amines/other chemicals, etc.); temperature; pressure rating; special
material requirements.
Part Number Prefix: 21MLA
Subsurface Flow Control Systems
