Drift
Drift is a simple and popular tool for drifting I.D. of casing, tubing, drill pipe and other pipes. It is used to check whether inside diameter of all kinds of pipes are complied with standard, and to determine the max. inside diameter to be drifted after deformed. The drift is thus granted as necessary tool in workover operation.
Drift for casing are available in two types:
Sub Type Drift machined with threads on both top and bottom ends, the top end is connected with drillstring, the bottom end is standby.
Bail type Drift is composited of gauge plate and connecting rod.
Double Bail Drift for tubing or drill pipe is usually used on the ground. The shape of drift diameter gauge is a long cylindrical body with sucker rod thread on both ends to be connected with sucker rod, the drifting is made manually.
Specifications – Sub Type Drift
Casing drift(in) | 4 1/2 | 5 | 5 1/2 | 5 3/4 | 6 5/8 | 7 |
|---|---|---|---|---|---|---|
O.D.(mm) | 92-95 | 102-107 | 114-118 | 119-128 | 136-148 | 146-158 |
Length(mm) | 500 | 500 | 500 | 500 | 500 | 500 |
Up connection | NC26 | NC26 | NC31 | NC31 | NC31 | NC38 |
Down connection | NC26 | NC26 | NC31 | NC31 | NC31 | NC38 |
Specifications – Double Bail Drift
Tubing size(in) | 1 1/2 | 2 | 2 1/2 | 3 | 3 1/2 | 4 |
|---|---|---|---|---|---|---|
O.D.(mm) | 38 | 48 | 59 | 73 | 84 | 95 |
Length(mm) | 500 | 500 | 500 | 500 | 600 | 600 |
Specifications – Bail Type Casing Drift
Pipe Model | Specifications(in) | Drift size | |
|---|---|---|---|
Length (mm) | Min.diameter (mm) | ||
Casing | <=8 5/8 9 1/8~13 3/8 >=16 | 150 , 305 , 305 | d-3.18 d-3.97 d-4.76 |
Tubing | <=2 7/8 >=3 1/2 | 1067 , 1067 | d-2.38 d-3.18 |
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