Taper Mills

OTI’s Taper Taps are internal catch fishing tools that are economical, simple to use and designed to ensure easy retrieval of fish from the hole. They are manufactured from high-grade alloy steel and heat treated to ensure highest strength.

OTI’s Taper Taps are manufactured with hardened cutting teeth (wickers threads) in either right-hand or left-hand orientations. The wickers can be machined as standard (non-fluted) or with fluted type wickers.

The hardened cutting teeth (wickers threads) ensure a definite and reliable engagement of the fish and provide an excellent grip when performing pick-up jobs without release of the fish. The right-hand wickers orientation helps in right-hand rotation engagement and the left hand wickers orientation helps in left-hand rotation engagement. Non-standard wickers are designed to provide circulation below the stuck point. Standard Fluted wickers are designed to ensure that during fish engagement, with adequate circulation, cuttings are flushed out.

OTI’s Taper Taps are available in two types – plain and skirt type.

Plain Type: Plain type Taper Taps are not threaded on the outside diameter shoulder.

Skirt Type: Skirt type Taper Taps comprises of the following three components –

  1. a Taper Tap with and upper pin thread.
  1. a skirt with an upper box thread (to screw on the tap), and a lower pin thread (to accommodate a guide shoe or protector).


  1. a guide shoe adaptable to the hole size, or a protector.

Taper Taps are available in a wide range of sizes & lengths and can be customized as per customer needs.

Ordering Instructions:

When ordering or requesting quotations on Taper Taps, please specify:

  1. Type of Taper Tap – plain or skirted.
  2. Size of the fish to be caught (also specify ID of the fish).
  3. Size and type of Top Pin Connection.
  4. Right or Left-hand wickers.
  5. Type of wickers – fluted or non-fluted.
  6. Smallest and largest Wickers diameter.
  7. Length.
  8. Any special feature (guide etc.)