Key seats develop during the drilling process whenever deviation or major changes in direction occur. Use TIANHE Key seat Wiper in these conditions will save you from costly fishing jobs and downtime.

The key seat reaming tool is a sleeve with five blades dressed with an aggressive tungsten carbide

hardfacing.

OPERATION AND APPLICATION

Key Seat Wiper is made-up just above the top drill collar. It contains a sliding reamer sleeve

with an O.D. slightly larger than the drill collar. When coming out of the hole, this sleeve detects the

key seat first - instead of the drill collar - by becoming wedged in restricted space.

By releasing the drill pipe, the sleeve may be jarred out of the key seat. A clutch-drive on the bottom

of the sleeve and the lower body is engaged by right-hand rotation.

Slowly raising the string and continuing rotation allows the sleeve to function as a reamer and wipe

out the key seat. The operation may be repeated to further enlarge the area, thus permitting free

passage of the collars.

Spiral blades with tungsten carbide hard-facing provide fast cutting action and maximum resistance to

wear.

When ordering please specify:

● Upper and Lower Neck Diameter;

● Upper and Lower Connections;

● Circulation bore;

● Drill collar O.D. or gauge O.D. of wiper sleeve at blades .