Logo1

genti dama tip postas

Tone Top 200

Tone Top 200

The Tone Top 200 was provided to MRD through Japanese AID,1981 and is equipped with rotary mud drilling and 5 ½" down the hole equipment. This drill rig is also equipped with 500 cfm airmen compressor. Casings of 6" and 8" in diameter have been installed using 12 ¼", 9 5/8" and 7 7/8" roller bits. With down the hole hammer, 5 ½" hammer is initially used and the hole is enlarged by reaming with a larger roller bit.

Some of the features of Tone Top 200 is given below:

 Depth (m)  Size of drill pipe
 300  2 3/8"
 200  2 7/8"
 150  3 1/2"

Swivel Head (Drive Head)

 Rotating Speed (rpm)

 Torque  Hyd. Pressure (kg/cm2)
Low Speed  0-60  500  240
High Speed 0-120 250 240

Supportable Load : 6,000 kg

Pulldown:
Type: Twin Hydarulic Cylinder chain feed
 Stroke: 7.5m
 Max. Thrust power: 6,000 kg at hydraulic pressure 170 kg/cm2

Mud Pump:
Model & type: Tone model "NAS-5H" heavy duty double, reciprocating mud pump
 Rated Capacity: 600 L/min
 Max Pressure: 25 kg/cm2

A 60m borehole can be drilled in two shifts using hammer method, while it will take 3 days to complete a 60m borehole using mud rotary drilling method.

Tone Top 300

Tone Top 300

The Tone Top 300, provided through Japanese AID in 1994, is equipped with rotary mud circulation pump and down the hole hammer drilling equipment. It has a 900 cfm Ingersol compressor. When mud rotary drilling is carried out, the initial roller bit used is 12 ¼". After drilling the regolith (weathered layer) the bit could be changed to 10 ½ ", 9 7/8" and 8 ½" depending on the diameter of the casing to be installed.

Groundwater boreholes are mostly completed with 6" and 8" screens and casings. The 8 ½" roller bit when used in down the hole hammer drilling, is capable of drilling to a depth of 150m.

Some of the features of TONE TOP 300 is shown below:

 Rotating Speed
 (rpm)

 Torque (kg.m)  Hyd. Pressure (kg/cm2)
 Low Speed  0-60  500  200
 High Speed  0-120  250  220


Loading Capacity: 7,000 kg

Pulldown

Type: Hydraulic Cylinder Wirefeed
 Stroke: 7.5m
 Pulldown force: Max 3,200 kg (at 50 kg/cm2 pressure)
 Holdback force: Max 7,000 kg (at 155 kg/cm2 pressure)

Mud Pump

Type and name: Tone Model "NP-700" duplex reciprocating mud pump
 Capacity: 615 l/min
 Max Pressure:22 kg/cm2
 Suction size: 100 mm (4")
 Delivery Size: 50 mm

A 8" diameter borehole 100m deep can be drilled in two shifts using down the hammer drilling method. Furthermore, a 60m deep borehole can be completed in three days using mud rotary drilling method on semi-hard formations.

Drilling

The Drilling section is responsible for the majority of Government drilling operations in support of research and applied geological surveys. These include drilling for groundwater, geotechnical and mineral investigation purposes.

Mineral Resources Department has 3 top drive drilling rigs, 2 percussion rigs and 2 diamond drill rigs.

The top drive rigs and percussion rigs are used for borehole drilling and the diamond rigs are used for coring as part of mineral exploration.

Tone Top 300

The Tone Top 300, provided through Japanese AID in 1994, is equipped with rotary mud circulation pump and down the hole hammer drilling equipment. It has a 900 cfm Ingersol compressor. When mud rotary drilling is carried out, the initial roller bit used is 12 ¼". After drilling the regolith (weathered layer) the bit could be changed to 10 ½ ", 9 7/8" and 8 ½" depending on the diameter of the casing to be installed.

Groundwater boreholes are mostly completed with 6" and 8" screens and casings. The 8 ½" roller bit when used in down the hole hammer drilling, is capable of drilling to a depth of 150m.

Read More

Tone Top 200

The Tone Top 200 was provided to MRD through Japanese AID,1981 and is equipped with rotary mud drilling and 5 ½" down the hole equipment. This drill rig is also equipped with 500 cfm airmen compressor. Casings of 6" and 8" in diameter have been installed using 12 ¼", 9 5/8" and 7 7/8" roller bits. With down the hole hammer, 5 ½" hammer is initially used and the hole is enlarged by reaming with a larger roller bit.

Read More

 

Gemco H22A

The GEMCO H22A rig was purchased by MRD and MAFF and is equipped with mud rotary and wire line equipment. Roller bit sizes vary from 7 5/8" to 14". The first bit could be used to drill up to 150m deep. (The 2 old diamond drills use conventional drilling method and are capable of drilling to depths of 300m) The cores can be obtained in two sizes:

NQ producing 47.6mm

BQ producing 36.5mm

This rig is capable of drilling 200m holes using rotary drilling method. A 60m deep borehole can be completed within three days of drilling.

Other Rigs
Bourne Drill, was purchased by MRD in 1977 and is percussion drill. This rig is equipped with tools to complete 8" and 6" diameter boreholes. A 30m borehole in hard formations can be drilled in 4 days using this equipment.

Ross Surveyor was provided to MRD though British AID in early 1980’s. It is a hand operated percussion rig capable of drilling sedimentary rocks to depths up to 30m. It is equipped with tools to complete 8" and 6" holes. The average depth drilledper shift is 10-12m. Most of the small islands drilling in Fiji has been carried out using this equipment.

Groundwater Development

Groundwater development is a government initiative that recognizes groundwater resources as a potential source of water in the rural areas where it is assessed to be present. The Mineral Resources Department was dedicated the responsibility due to the nature and occurrence of groundwater as close relation to geology as well as the existence of technical expertise, resources, data and experience in groundwater assessment. Such development responsibility of the Department in groundwater development ends at the completion of the borehole construction and pump test and it is the responsibility of the concerned communities to reticulate the water from the borehole for their benefits.
A number of communities have difficulties in securing funds or assistance and are unable to reticulate the water from the borehole for their benefits and in some cases the borehole are left unused and damaged or vandalized.

Background
The Mineral Resources Department has been conducting hydrogeological studies in Fiji since 1967. In respond to the rapidly increasing demand from the public to use groundwater, MRD established the Groundwater Resources Assessment and Development Unit (GRADU) in 1985, in co-operation with the British Government.
MRD is responsible for collecting and storing all information relating to groundwater in Fiji. Investigations carried out by GRADU are designed to improve knowledge of groundwater and are directed to areas of particular need so any groundwater discovered can be utilized for the benefits of the deserving public.
In the early arrangement GRADU would carry out the groundwater assessment and investigation which then includes drilling of exploratory/test boreholes by the Drilling Section. The then PWD is responsible for reticulation of water from the boreholes if it is confirmed to be sustainable to the communities.
The current arrangement, at the completion of the borehole construction and pump test, a completion report is then submitted to the community who requests for such groundwater development. A copy of the report is often submitted to the respective Divisional Officer for their reference. It is then the community’s responsibility to seek fund or assistance to reticulate the water from the bore to each individual household. The completion report contains the respective details for the pump setting and the specification of the submersible pump that matches borehole capacity to ensure sustainable extraction of groundwater.

Purpose/Aim

  • To explore potential integration approach with/amongst respective stakeholders to advance groundwater development project to ensure communities benefits from borehole (groundwater) sources.
  • To put together a clear standard operating procedures for the integration approach of advancing the groundwater development from where MRD’s role ends to ensure rural communities benefits from discovery of groundwater

Requests for Groundwater Assessment & Development

  • Request is received by the Department through formal letter or email and forwarded to Director of Mineral Development (DMD) for approval.
  • Community requests may be submitted with a support letter from the relevant Provincial Administrator/District Officer/ or Divisional Commissioner.
  • Request for Commercial or Private ground water development is subject to DMD’s approval which the Department shall issue a quotation for the work required. Commitment to carry out such work will only commence after full amount of the quoted amount is paid to MRD accounts.
  • Endorsement by Director Mineral Development (DMD) and verfication by Hydrogeology section
  • Sent acknowledgement letter to the customer.