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GST® Milling Shoes
Features:
▲ Tailored Engineering & Proven Expertise Every GST milling shoe benefits from our deep industry experience. We don’t just manufacture; we design custom solutions based on years of proven field success to solve specific downhole challenges.
▲ Premium Materials & Advanced Welding Technology Built to withstand the harshest environments. By combining state-of-the-art welding techniques with top-tier, wear-resistant materials, we ensure maximum structural integrity and cutting-matrix bond strength.
▲ Maximum Efficiency & Extended Operational Life Engineered for aggressive cutting and optimal durability. Our milling shoes deliver higher rate of penetration (ROP) and stay downhole longer, significantly reducing trip time and overall operational costs.
▲ Comprehensive Customization (Types & Sizes) No two wells are the same, and neither are our tools. We offer a highly versatile range of configurations – including flat-bottom, concave, and pilot milling shoes – completely customized to your precise dimensional and application requirements
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Rotatory Scrapping Tool
A downhole tool used for cleaning casing while drilling out cement pocket to save rig time.

Features:
▲ No damage to casing
▲ Self-cleaning
▲ Drilling cement and scraping casing in one trip
Data sheet
Type | 5 | 51/2 | 7 | 7-7/8 | 9.5/8 |
OD (in) | 4-5/16 | 4-7/8 | 6-1/4 | 7-1/8 | 8-11/16 |
ID (in) | 29/32 | 1-1/4 | 1-1/2 | 1-1/2 | 2-1/4 |
IDofDC (in) | 4-1/8-4-1/4 | 4-11/16-4-3/4 | 6-1/8-6-1/4 | 7 | 8-13/32-8-3/4 |
Length (ft) | 4-1/2 | 6-1/8 | 6-1/4 | 6-1/8 | 8-1/4 |
Connection | 2-3/8 IF | 2-3/8 IF | NC35 | 3-1/2 IF | 4-1/2 IF |
Bi-Directional Reaming Tool
This downhole tool is designed to be run with drill string to smooth a wellbore, remove cuttings to minimize pipe-stuck risks, and reduce reaming time to lower overall drilling cost.

Features:
▲ Bi-Directional Cutting Efficiency: Engineered with multiple round blades and cutters to optimize reaming efficiency in both directions.
▲ Maximised Flow Area: Features an expanded flow area to enhance cuttings removal and fluid circulation capabilities.
▲ Risk Mitigation: Reduces drill string friction to significantly minimize the risk of stuck drill pipe.
▲ High-Grade Construction: Fabricated from premium, high-grade steel to ensure exceptional reliability and extended tool life.
Specification | DHT-165 | DHT-172 | DHT-216 | DHT-241 | DHT-311 | DHT-333 |
ID | 57.2 | 57.2 | 71.4 | 71.4 | 71.4 | 71.4 |
Length | 4.75 | 4.75 | 4.75 | 4.75 | 4.75 | 4.95 |
Connection | NC38 | NC38 | NC50 | NC50 | NC50 | 65/8 REG |
Connection (KN.m) | 15.6 | 15.6 | 40.7 | 40.7 | 55.8 | 55.8 |
Max. Troque (KN.m) | 35 | 35 | 78 | 78 | 96 | 96 |
Mas. Tensile strength (KN) | 1690 | 1690 | 2460 | 2460 | 2720 | 2720 |
Phone: +86-28-83973858
Email: sales@grandoiltech.com