HDD70 - 7 ½" Pilot Holes - Mincon Group PLC

Overview

The Mincon HDD70 Hard Rock Pilot Hammer is designed around proven technology to perform at the top end of the performance scale compared to other tools on the market. While providing the most complete range of pilot hammers, Mincon also provides their world class design and technology including:

Key Features and Benefits

Dual steering point design incorporating slanted drill bit and 2° bent sub provides more responsive steering capabilities while transitioning in and out of rock formations.
High frequency hammer cycle transmits less vibration that can be detrimental to sensitive electronics. Rock formations fracture into smaller pieces which are easier to flush out of the bore hole. Less Stress Transmits to pipe joints and gearbox assembly reducing maintenance requirements to drill. Provides the most effective steering in any pneumatically powered HDD system.
High pressure/high volume compressed air powers drilling operations and requires minimal torque and feed pressure loads on drill machine increasing overall life of drill.
Shorter body design compared to competitive models allows for easier steering in the bore hole and less rotational stresses on hammer body.
Existing locating electronics (DCI, Subsite, or WIRELINE) can be used with no additional cost to the contractor.
Support Station delivers compressed air mixed with a water/polymer (5-9 gal/min) and rock drill oil (2-4 pints/hr) to operate the drilling cycle resulting in minimal environmentally friendly clean up. Can be used on environmentally sensitive locations using Mincon Envirosafe RDO biodegradable rock drill oil.

Specifications

Specifications	Metric	Imperial
Hammer Outside Diameter	146mm	5.75"
Hammer Length (Sonde Backhead Shoulder to Chuck)	1951mm	76.8"
Backhead Spanner Flat Size	134mm	5.28"
Drill Bit Shank Type	HDD70
Pilot Bit Size	190mm	7. 5"
Hammer Weight (Less Bit)	158.6Kgs	327.5Lbs
Piston Weight	20 Kgs	44 Lbs
Bent Sub to Wear Sleeve Stand Off	0.75mm	0.030"
Make up Torque	6100-8135 NM	4500-6000 FT Lbs
Recommended Minimum Air Package (<250ft Bore Length)	425 l/s @ 24.1 Bar	900 cfm @ 350 psi
Recommended Minimum Air Package (>250ft Bore Length)	519 l/s @ 24.1 Bar	1100 cfm @ 350 psi

System Components

Item	Description	Part Number
	Mincon HDD70 Hard Rock Hammer Crate	MHDD70AS11
1	Mincon HDD70 Sonde Housing	MHS601AS01
2	Mincon HDD70 Hammer	MHD601AS01
3	DCI 15" Sonde Carriage	MN585
4	Sonde Torque Wrench	MN553
5	Sonde Line up Tool	MN551
6	Service Kit (Hammer)	MHD626SK01
7	Service Kit (Sonde Housing)	MHS626SK01
8	Plusco Thread Sealant	MN730
9	Drill Bit x 2	74HD70SDIRD
10	HDD70 Timing Shim (0.015") x 2	MN07015
11	HDD70 Timing Shim (0.030") x 2	MN07030
12	HDD70 Timing Shim (0.060") x 2	MN07060

Item	Description	Part Number
	Mincon Support Station Crate	M103 072 01
1	Mincon Support Station	M103 036 90
2	20 Foot x 2" 1000 PSI High Pressure Hose with Hammer Lock Couplings	M103 038 43
3	30 Foot x 2" 1000 PSI High Pressure Hose with Hammer Lock Couplings	M103 038 44
4	40 Foot x ¾" Water Hose with ¾" Camlock couplings	M103 038 45
5	Safety Whip Checks x 4	M103 020 71

Parts list

Item	Description	Part Number
	Mincon HDD70 Sonde Housing	MHS601AS01
1	Sonde Housing Backhead (3 ½" API Reg. Pin)	MHS601BH01
2	Air Diverter Plug (1/8" Orifice)	MHS409DP02
3	Sonde Spacer	MHS402SS01
4	Compression Ring	MHS305LR01
5	Sonde Carriage (Not Included)	MN585
6	O Ring	MHS621OR01
7	Diverter	MHS605DV01
8	O Ring	MHS621OR01
9	Sealing Sleeve	MHS606SL01
10	O Ring	MHS621OR01
11	Sonde Housing Sleeve	MHS604SH01
12	O Ring	MHS621OR01
13	Carriage Guide	MHS607CG01
14	O Ring	MHS621OR01
15	Locating Pin	MHS608LP01

	Service Kit	MHS626SK01
	Air Diverter Plug (Solid)	MHS409DP01
	O Ring Kit (Items 6, 8, 10, 12,14)	MHS425OK01

	Mincon HDD70 Hammer	MHD601AS01
16	Bent Sub	MHD601BH01
17	Choke Blank	MB506CH01
18	Check Valve	MB502CV01
19	Spring	MB503SP01
20	Steel Make up Ring	MD604SM01
21	Lock Ring	MD605LR01
22	Air Distributor	MD607DR01
23	O Ring	MD621OR01
24	O Ring	MD620OR01
25	Seating Ring	MD609SR01
26	Inner Cylinder	MD608IC01
27	Piston	MD610PN01
28	Wear Sleeve	MHD611WS01
29	Piston Retaining Ring	MD612PR01
30	Aligner	MHD613BB01
31	O Ring	MD622OR01
32	Bit Retaining Ring	MHD614BR01
33	O Ring	MD621OR01
34	Chuck HDD70	MHD614CK01
35	Drill Bit	74HD70SDIRD

	Service Kit	MHD626SK01
17	Choke Blank	MB506CH01
	Choke 1/8" (3.2mm)	MB506CH02
	Choke 3/16" (4.8mm)	MB506CH03
19	Spring	MB503SP01
	O Ring Kit (Items 23, 24, 31, 33)	MHD625OK01

Lubrication

DTH hammers must receive a constant supply of proper rock drill oil to protect the internal components and to provide a good air seal between the hammer\'s running surfaces for efficient drilling. Mincon recommends the use of Mincon Envirosafe® Rock Drill Oil (RDO) to maintain optimal performance and extend the life of the internal components. The correct consumption of oil is dependent upon the air volume and conditions. Please refer to the lubrication graph below for recommendations. When drilling in wet conditions the normal amount should be doubled. There should be visual evidence of oil around the drill bit shank and within the tube joints when changing tubes.

If using petroleum based rock drill oils, the recommended grade of oil is dependent on the ambient temperature and the operating pressure. As a rule of thumb, ISO320 grade rock drill oil should be used whenever possible as the hammer is a high frequency tool, however, where the pump cannot pump the oil in colder conditions, a lower grade of oil can be used as per the graph below.

Mincon Oil Grade Chart Web