Hole Openers
The Tasman single stage hole opener is a simple but rugged design used for enlargement of pilot holes and large hole applications from 8.1/2″ to 56″. The body is machined from AISI 4145 fully heat treated alloy steel with arms welded onto the body providing location for the cutters. Arms and cutters are hardfaced for protection. The cutters are available in different designs for varying conditions and rock formations. The cutter assembly is a fully sealed unit incorporating ball & roller bearings. Retaining the whole assembly is achieved by a locking pin. The design of the hole opener enables quick overhauls on the rig site. Three or six replaceable nozzles are used giving optimum mud circulation around the cutters.
Tasman offers Security Standard and Security Custom Hole Openers.
Security Standard Hole Openers
Tasman Security Standard Hole Openers are designed for enlargement of pilot holes, directional drilling and large hole applications.
Applications
Enlargement of pilot holes, directional drilling and large hole applications.
Features and Benefits
Integral bodies for strength.
Interchangeable cutters allow changing of the cutter assemblies when worn or when new formations are reached.
Quick-change cutter assemblies (simple pin removal on the rig floor using only hand tools)
Regular circulation, or 6-nozzle (3 cutter pocket, 3 wing) circulation for optimizing available hydraulics.
Snap-ring nozzle retention for easy disassembly.
Rock bit or bull-nose pilot equipment available.
Specifications
- 8.3/8-8.3/4 (213-222)
- 5.7/8 (149)
- 8.3/8 (213) 8.1/2 (216) 8.5/8 (219) 8.3/4 (222)
- 5.3/4-6 (146-152)
- 248 (112.5)
- 12-12.1/4 (305-311)
- 8.1/8 (206)
- 12-(305) 12.1/4 (311)
- 8 (203)
- 540 (245)
- 17.1/4-17.1/2 (438-445)
- 12 (305)
- 17.1/4 (438) 17.1/2 (445)
- 8 – 9.1/2 (203-241)
- 960 (435)
- 22 (559)
- 13.1/4 (337)
- 22 (559)
- 8 – 9.1/2 (203-241)
- 1650 (748)
- 24.1/2-26 (622-660)
- 15.1/2 (394)
- 24.1/2 (622) 25 (635) 26 (660)
- 8 – 9.1/2 (203-241)
- 1932 (876)
When ordering Tasman Security Standard Hole Openers please specify:
Hole size
Fishing neck OD
Connection (size, type and location of pin and box)
Circulation type (regular or 6-nozzle). If 6-nozzle please specify nozzle size and location (pockets and/or wings)
When ordering cutters, please specify hole size to be drilled.
The pilot, either rock bit or bull nose, should be ordered separately. If bull nose, specify spiral, plain or side-hill type, and with or without circulation.
Cutter Types
Type S: Tooth type for soft formations.
Type SM: Insert type for soft to medium formations.
Type M: Tooth type for medium formations.
Type MH: Tooth type for medium to hard formations.
Type XH: Insert type for hard abrasive formations.
Security Custom Hole Openers
Tasman Security Custom Hole Openers are designed to handle big hole drilling projects, offshore well conductor holes, and other drilling needs where speed and reliability are important.
Applications
Enlargement of big hole drilling projects.
Features and Benefits
Quick-change hole opener cutter assemblies to allow fast, easy changes on the rig floor using hand tools. Simply pull “Nail-Lock” retaining pin, loosen the eccentric lock, remove the main pin, and remove cutter from its saddle. Reverse these procedures for cutter installation.
Replacement bearing kits can be installed to extend the useful life of the cutter where cutting structure life is longer than bearing life.
High-velocity jet circulation for efficient hole cleaning and longer cutter life.
Nail-Lock retained nozzles can be changed quickly and easily for matching particular pump capacities or hydraulic programs.
Specifications
- 26 (660)
- 14.3/4-17 1/2 (375-445)
- 3
- 2.1/2 (64)
- 10 (254)
- 9.1/2 (241)
- Upper stem lengths are available in 24 and 60
inches as standard, however, others are available on request
- 36 (914)
- 17.1/2-26 (445-660)
- 4
- 3.1/2 (89)
- 10 (254)
- 10.1/2 (241)
* These sizes are the most commonly requested; however, Security’s Custom Hole Openers are available in other sizes upon request
When ordering Tasman Security Standard Hole Openers please specify:
Hole size
Connection (size, type and location of pin and box)
Nozzle size
Length of fishing neck
When ordering cutters, please specify type. All have sealed bearings.
Cutter Types
Type S: Tooth type for soft formations.
Type SM: Insert type for soft to medium formations.
Type MH: Tooth type for medium to hard formations. Carbide inserts for gauge protection.
Type XH: Insert type for hard formations.
Type X10: Insert type for extremely hard, abrasive formations.
Download Technical Data Sheets
Security Standard Hole Opener.pdf
Security Custom Hole Opener.pdf