Fishing Division

Dosco’s Fishing Division is established to provide the Fishing Sector within the Oil & Gas industry the best tools and services to which work-over had grown accustomed to.

The Fishing Division provides a full line of cased hole and open hole tools run by experienced supervisors – proven to be among the best in the business. Dosco Petro Services developed technically advanced mills designed to be used on the toughest milling operations getting the best results in a minimal amount of time.
Dedicated to the same standards of safe working environment, quality tools and superior services, the Fishing Division greatly enhances the ability to service customers around the clock, seven days a week.

Designed specifically for milling through tight spots in tubular. Taper Mills are recommended for cleaning out liners, tubing and other collapsed or deformed tubulars.

Available in sizes ranging from 3 7/8” up to 8 1/2“

Ideal for milling internally or externally plugged tubular fish, having yielded runs of up to 180 feet of tubing per mill (milling 180 feet of 4 1/2 inch, 12.6 lb/ft tubing).

Available in sizes ranging from 3 7/8” up to 8 1/2“

Designed for light milling, such as float collars, plugs, bridge plugs and retainers.

Available in sizes ranging from 3 7/8 up to 8 1/2“

Ideal for cleaning out damaged casing, liners or tubing and it stabilizes the milling assembly. String Mills are also recommended for removing key seats in open hole.

Available in sizes ranging from 3 7/8” up to 8 1/2"

Dressed with high quality tungsten carbide to ensure optimum performance in every application.

Available in sizes ranging from 3 7/8” up to 17 1/2“

Used to determine the position and condition of the top of a fish or junk in a well. Impression blocks feature a steel body with the lower end fitted with a block of soft material, typically lead.

Used to retrieve small, oddly-shaped debris with magnetic properties that could adversely affect the tool’s performance. Junk Magnets are frequently run before the use of diamond tools.

Available for all hole sizes

The Fishing Division provides:

  • Internal and external wellbore tubular catching
  • Professional milling services
  • Large range of mills
  • Wash-over tools
  • Hydraulic fishing jar services
  • Internal hydraulic casing cutting equipment
  • Wellbore clean out services
  • Side-track systems

Provides a proven and reliable method for severing single or multiple strings of casing. Three heavy-duty cutter arms dressed with crushed carbide are capable of completing a cutout in most weights and grades of casing, conductor pipe and marine riser.

Available in a range of sizes for cutting pipe from 4 1/2“ up to 30”.

The Bumper Sub allows the operator to bump down (or up) to disengage the fishing tools. The Bumper Sub’s robust design and materials quality ensure reliable performance in the harshest down-hole environments. Bumper Sub’s are available in a wide range of casing sizes.

Combines optimal impact characteristics with high-endurance construction to provide reliable fishing performance in harsh down-hole environments. Tool seals are temperature rated up to 500 Fahrenheit (260° C) and pressure rated up to 20,000 psi (1378 bar). The temperature compensation system in the detent area permits prolonged jarring without loss of impact force. Available for casing from 4 1/2” up to 9 5/8”.

Washing over is an effective method of freeing stuck pipe in the well bore, by cutting away and circulating out obstructions hindering the pipes movement.

Dosco offers an array of washover shoes and pipes to suit in 5 1/2” and 7” casings, mainly for WO operations. Shoes are dressed on demand and depending on application and are made from material of at least N-80 grade.

Improves jar impact, provides a supercharged blow directly above the fish and absorb the axial vibrations to the surface, protecting the top drive. Used in conjunction with the Hydraulic Fishing Jar, the Hydraulic Accelerator Tool maximizes jar impact about 1.5x regardless of depth, because it can either replace pipe stretch as the energy source in shallow holes, or supplement the pipe stretch energy in deeper wells.

Internally engages and retrieves drill pipe, casing, tubing or any other tubular with up to a 8 1/2“ inside diameter. It is built to withstand severe jarring and pulling strains. Heavy-duty versions of the spear can be used with pulling tools for maximum performance.

Designed to engage, pack off and retrieve tubular lost in hole. Is especially suited to retrieve parted drill pipe and drill collars. Available in four different configurations: Full Strength (FS), Semi Full Strength (SFS), Slim Hole (SH) and Extra Slim Hole (XSH) to cover a range of external catch fishing requirements.

Used to remove paraffin, hardened mud, cement or burrs resulting from tool runs or perforations from the inner surface of tubulars. Casing scrapers are particularly useful for cleaning up the casing before setting a packer. Casing Scrapers are available in a wide range of casing sizes.

The Reverse Circulation Junk Basket produces a circulating force that is capable of scavenging the most oddly shaped items from the hole bottom, including bit cones, slip inserts, tail chains, junk shot remnants and other small debris. The RCJB can easily be converted to a conventional core basket by removing the jet components and attaching the junk retaining assembly directly to the top sub.

Boot Baskets are useful in drilling and milling operations to catch debris that is too heavy to circulate out of the hole. The boot basket traps junk by producing a sudden decrease in annular velocity after the cuttings pass the larger OD of the boot to reach the smaller OD of the body. Boot Baskets are available in a wide range of sizes to run with most bottom hole assemblies.

Provide an additional level of protection against a stuck fish securing the entire fishing string into the well-bore by acting as a positive releasing mechanism in the event that the catch tool cannot be released. Safety joints are available for wash-over, drilling and fishing applications. Safety joints are designed to withstand high torsional, axial and impact loadings.

Washing over is an effective method of freeing stuck pipe in the well bore, by cutting away and circulating out obstructions hindering the pipes movement. Dosco offers an array of washover shoes and pipes to suit in 5 1/2” and 7” casings, mainly for WO operations. Shoes are dressed on demand and depending on application and are made from material of at least N-80 grade.

Get in touch

Get in touch if you would like to receive a quotation or wish to receive more information about our Fishing Division. We'll have one of our experienced and professional team members get back to you as soon as possible.