1. Preliminary
These technical descriptions and requirements serve to provide information to the implementer, in general, to be able to produce the wells according to the plan, the type of work, the volume of work to be performed, the type of materials to be used.
2. Personnel and Equipment Drill
An executor of activities shall provide standard equipment and experienced workforce to use the equipment. Implementing activities should enclose the following documents:
a. Experienced list of Executives on the work ever and other technical specifications of the well.
b. Name of personnel who will be responsible for the work to be performed.
c. Type of drill tool, as well as other tools to be used in this work
3. Work Preparation
The preparatory work should be in accordance with the ones listed in the general technical specifications, Start the preparatory work until the main job is done. The executor of the activity has responsibility for all costs/risks incurred during the work. Implementing activities should prepare all equipment and other work buildings such as the preparation of equipment, aids, entrance, plastering of form/floor work and others.
4. Production Test Well Drilling
a. General
Implementation of drilling is only to investigate the potential of water, such as geological/hydrogeological conditions and test discharge capacity and water quality.
b. Volume
Work Drilling work in accordance with Bill Of Quantities (BOQ).
c. Location
Temporary drilling work of the wellbore point can be seen in the drawing of the plan. The next point will be determined by the assignor, then the drilling point will be shown in the field by the directors/Experts.
d. How to Implement
The executor of the activity will use the job technique according to the geological condition of the area. The choice of method and control will be the responsibility of the executor of the activity.
e. Order of Implementation:
An open hole for installation of a temporary casing (conductor pipe) minimum 12 m.
Drill Pilot Hole with minimum diameter of 150 mm During drilling the executor of activity must do things as follows:
• Drilling 'cutting' each depth interval of 1 meter.
• Description of cutting/core; presented in bore log.
• Observation of drilling penetration speed for each drop of 1-meter drill handlebars.
• Record the water level on each day before work begins in the morning and after work is determined in the afternoon.
• Observe and record the amount of EC, on any layer suspected as an aquifer.Immediately after completion of the pilot hole as per technical specification do logging.
Install the temporary pump casing
Perform a pump out test
Send to the Task Force, the results:
• Description of the following drilling cutting for example.
• Pump out test data, following test results of water and laboratory samples
• Logging results / graphsWait for the decision about the continuation of the work whether the borehole directly reaming, move or stop (stop)
The depth of drilling tailored to Geoelectric results
5. Tilt / Deviation
The radial deviation from the center of the drill hole theoretically from the vertical well is no more than 0.5% in harmony with the depth. This slope will be tested with a "plumpness" system.
6. Equipment and Materials
All equipment and materials are following SII or equivalent standards.
7. Drilling Rigs / Drill Tool
The executor of the activity shall provide equipment in accordance with the technical specifications requested. The technical limitations, in general, can be explained as follows:
a. For a rotary drill machine or "Hydraulic Rotary" shall have a drill-capable capacity up to a diameter of 500 mm / 20 inches at a depth of 200meter. If the equipment is used:
b. For rotary percussion it is necessary to provide Down the hole hammer, minimum diameter 150 mm/6 inch depth 200 m.c. For coring, through bars must have a minimum capacity capable of drilling with a maximum diameter of 100 mm/4 inches at a depth of 150 m. The drilling system can be done using a core barrel, a double tube type or using a wireline sampling system. For all the above drilling tools should be able to lift a load of 4500 kg (hoisting capacity). For each well shall be provided 1 (one) unit consisting of 1 (one) drilling rigs and sludge pump. Before the mobilization will be examined unit Rigperalatan.Mengingat almost all the location of the drilling has a narrow land so each buffer/tackle used is a box type instead of Tripod.
Source
id.scribd.com