Casing Accessories

Overview

Top-Co’s centralizers and casing accessories are designed and manufactured to assist casing running and cementing. Starting, Running and Restoring force tests performed in Top-Co’s Test Facility as per API Specification 10D, and holding force tests as per API Recommended Practice 10D-2. The tests are conducted at Top-Co’s state-of-the-art testing facility, which features a fully computerized centralizer test bench.

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Product Catalog

Casing Accessories

Stop Collars

Type 405 – Hinged with Bolt

  • Bolt lock mechanism allows for quick and easy installation over casing.
  • Holding force tested as per API Recommended Practice 10D-2.

Type 410 – Hinged with Spiral Nails

  • Utilizes spiral locking pins which, when driven in firmly, lock the collar into position around the casing.
  • Sizes less than 13-3/8” use two spiral locking nails.
  • Sizes 13-3/8” and greater use four spiral locking nails.
  • Holding force tested as per API Recommended Practice 10D-2.

Type 416 – Heavy Duty, Slip On with Set Screws

  • Installed with set screws.
  • Designed for use where higher holding forces are required.
  • Easy installation that can be achieved using an 1/4” Allen wrench.
  • Available options include stainless steel set screws, full stainless steel design, slim hole set screws.
  • Holding force tested as per API Recommended Practice 10D-2

Type 417 – Super Heavy Duty, Slip On with Set Screws

  • Utilizes 3 rows of set screws to give excellent gripping force for holding centralizers in place where high axial loads are expected.
  • Available options include stainless steel set screws, full stainless steel design or slim hole set screws or beveled edge.
  • Holding force tested as per API Recommended Practice 10D-2.

Type 420 – Hinged with Set Screws

  • Designed to be latched on to the casing with set screws providing additional holding force.

Cement Baskets

Type 400 – Welded, Hinged/ Slip On

  • Design allows cement to flow in an upward direction and helps support the hydrostatic column of fluid.
  • Typically run above weak formations requiring protection from the pressure exerted by the cement column.
  • Also available is Type 403 Cement Basket – slip-on with internal stop collar

Well Bore Cleaning Tools

Type 452 – Wall Cleaner, Cable, Hinged

  • Removes excess wall filter cake which helps to improve cement bond.
  • Hinged design for ease of installation.
  • Also available with slip on design (Type 450).

Centralizer Installation

Centralizer Installation

Preferred installation is over the stop collar. This allows for the bow spring centralizer to be pulled into the hole during run-in (Fig 1). Pushing the centralizer will increase starting and running forces and may damage the bows.

Placement over the coupling eliminates need for stop collar but can reduce standoff at midspan (Fig 2).

For solid body centralizers, stop collars are recommended to be placed above and below centralizer (Fig 3), but can also be installed between collar and coupling (Fig 4), or they are installed to float between couplings.

Type 100 – API Modified High Pressure Thread Compound

  • Excellent lubrication qualities to prevent galling and wear of threads.
  • Manufactured to API BUL 5A3 requirements.
  • Brushable over a wide temperature range.
  • Leak prevention to 10,000 psi.
  • Not recommended for rotary shoulder connections.
  • Available as a lead-free option.

Type 200 – Thread Lok Compound

  • Used for bonding most threaded substrates, including all metals, wood, composites, rubber to metal, rubber to cement, rubber to wood, and rubber to composites.
  • Can also be used as adhesive metal filler.
  • Kit is provided in pre-measured amounts of resin paste and liquid activator.