Washover Shoe

Driscoil Equipment supplies Washover Shoes designed for downhole fishing and workover operations. The tool is installed at the lower end of a washover string and is used to wash over, clean around and free stuck fish, allowing the fishing string to gain access to the fish. It can help remove formation debris, sand, scale, cement and other obstructions surrounding the fish.

Technical Specification

Parameter Typical Specification

Equipment Type Washover Shoe / Rotary Washover Shoe

Application Fishing, drilling & workover

Primary Function Washing and cutting clearance around downhole fish

Material High-strength alloy steel

Manufacturing Process Forging

Cutting Surface Tungsten carbide / hardfaced cutting elements

Operation Rotary with circulation

Suitable Fish Stuck drill pipe, tubing, casing and other downhole fish

Size Range Approximately 5½"–16", with other sizes available

Connection API / customer-specified connection

Pressure Application dependent

Temperature Rating Well-condition dependent

Cutting Action Rotary cutting / scraping

Circulation Through washover string and shoe

Hardfacing Available

Customization OD, ID, cutting profile and connection

Inspection Visual, dimensional and NDT inspection available

Published industry specifications show wash-over assemblies in sizes ranging from approximately 5½" to 16", with dimensions selected according to the casing/wellbore and fish diameter.

Example Washover Assembly Dimensions

Washover Size Max. Fish OD Nominal ID Approx. Make-Up Torque

5½" 4⅝" 4.892" 2,370 ft-lb

5¾" 5" 5.124" 2,700 ft-lb

6⅝" 5¾" 5.921" 4,000 ft-lb

7⅝" 6½" 6.765" 4,340 ft-lb

8⅛" 7 1/16" 7.250" 8,370 ft-lb

9⅝" 8⅝" 8.835" 10,000 ft-lb

10¾" 9½" 9.760" 16,000 ft-lb

13⅜" 12⅛" 12.415" 15,000 ft-lb

16" 14½" 14.870" 47,000 ft-lb

These figures are representative published washpipe/washover configurations; the actual wash-over shoe must be selected based on the fish OD, casing ID, required clearance, connection and operating conditions.

Key Features

Heavy-duty alloy-steel construction

Tungsten-carbide or hardfaced cutting surfaces

Designed for rotary washing and cutting

Helps remove debris surrounding the fish

Provides clearance between the fish and wellbore

Suitable for difficult fishing operations

High torsional-strength connection options

Multiple cutting profiles available

Custom sizes and connections available

Compatible with complete washover-string assemblies

Typical Applications

Oil & Gas Fishing

Stuck drill pipe recovery

Tubing recovery

Casing fishing

Washover operations

Freeing stuck fish

Removal of cement around fish

Well Workover

Sand removal

Scale removal

Debris clearance

Cement obstruction removal

Preparation of fish for overshot or spear engagement

Washover String Accessories