LIFT SUBS
All Lift Subs are made from the same materials used in Drill Collars. They are machined and heat treated according to Drill Collar specifications 7-1. All connections are phosphated to prevent galling on initial make up

Drill Collar Size
Approx Weight
3 1/2 - 3 7/8
4 – 4 3/8
4 1/2 - 4 7/8
40
50
84
5 – 5 3/8
5 1/2 - 5 7/8
6 – 6 3/8
88
120
150
6 1/2 - 6 7/8
7 – 7 3/8
7 1/2 - 7 7/8
168
169
242
8 – 8 3/8
8 1/2 - 8 7/8
9 – 9 7/8
257
280
305
9 1/2 - 9 7/8
10
11
320
333
368

When ordering or requesting quotations on Lift Subs, please specify:
1. Drill Collar OD (Diagram Section A)
2. Tool Joint OD (Diagram Section B)
3. Tapered, Square Shoulder or combination
4. Drill Pipe OD (Diagram Section C)
5. Drill Collar connection size and type (Diagram Section D)
6. Bore

Notes
1. Add 6 inches to overall length for a box in the top of the Lift Sub

LIFT PLUGS
If specified Lift Plugs will be centre bored to reduce weight. All are manufactured from AISI 4145 H Modified Q & T Alloy Steel. For reworking the Pin threads, the Lift Subs has 1 inch of neck below the lifting plate.

When ordering or requesting quotations on Lift Plugs please specify :
1. Drill Collar OD (Diagram Section A)
2. Drill Collar Connection Size and Type
3. Bore (Diagram Section C)

Drill Collar Size
(A)
Lifting Plate Dia
(B)
Connections Bore
(C)
Approx Weight
(Ibs)
3 1/2 - 3 7/8
4 – 4 3/8
4 1/2 - 4 7/8
5 1/2
6
6 1/2
1 1/2
2
2 1/2
35
40
50
5 – 5 3/8
5 1/2 - 5 7/8
6 – 6 3/8
7
7 1/2
8
2 1/4
2 1/4
2 1/4
58
70
82
6 1/2 - 6 7/8
7 – 7 3/8
7 1/2 - 7 7/8
8 1/2
9
9 1/2
2 1/4
2 13/16
2 13/16
90
100
118
8 – 8 3/8
8 1/2 - 8 7/8
9 – 9 3/8
10
10 1/2
11
2 13/16
2 13/16
2 13/16
128
132
150
9 1/2 - 9 7/8
10
11
11 1/2
12
13
2 13/16
2 13/16
2 13/16
165
178
245

SUBS
Interdril’s Integral Substitutes are manufactured from Alloy Steel AISI 4145 H Modified confirming to the requirements of API specification 7-1.
All connections are machined to API specification.

Thread roots are cold rolled and phosphated to minimize galling.
Substitutes are manufactured with straight or reduced section as shown below.
When ordering or requesting quotations on Subs, please specify :
1. Identify use (e.g. DC/DC – DC/DP – Bit Sub etc)
2. Outside Diameter
3. Bore
4. Overall length
5. Size and Style of connection
6. Whether stress Relief Groove and or Bore Back are to be incorporated
For reduced section Substitutes include : 
1. Outside diameter of reduced section
2. Length of reduced section
   
For Bit Substitutes include
1. Float Bore & Style