Mud chemicals identification

In document Drilling and workover best practices (Page 28-33)

3.2.1. For each product , contractor shall furnish the following informations:

• Commercial name

• Chemical name and composition

• Products classification

• Product application and recommended concentration

• Type of packing (sacks, drums etc.)

• Material safety data sheet.

A-1-SS-1719 5.5

3.2.2. Contractor shall also inform of any possible danger in using the products offered (HSE information).

A-1-SS-1719 5.5

3.3. Equipment

3.3.1. Contractor shall have the availability, when needed a specific technical support, of a laboratory able to perform tests according with API RP 13B-1, 13B-2 (Standard Procedure for Field Testing Drilling Fluids) and with API RP13I-2 (Standard Procedure for Laboratory Testing Drilling Fluids).

A-1-SS-1719 5.3

3.3.2. The main performance request is:

• ‘G’ factor up to 3.000

• must be able to work on 5 microns size solids

• high speed

• must be able to treat up to 18m3/h

• RPM up to 3.300

3.3.3. On request, Contractor must be able to provide centrifuges with independent generator.

A-1-SS-1719 5.4.1

3.3.4. Nothing shall relieve the contractor of the responsibility for performing such analysis, tests, inspections and other activities that he considers necessary to ensure that the product, and workmanship are satisfactory for the service intended, or as may be required by common usage or good practice.

A-1-SS-1719 3


4.1. Engineering

4.1.1. The contractor shall provide an adeguate service for engineering support which shall include the following duties:

A-1-SS-1729 5.1

4.1.2. • Drawing up of cement slurry programmes

• Supplying all the laboratory equipment necessary for testing slurries, spacers and API tests on chemical products including quality control on cement,

• Computer monitoring for cementing operations, real time acquisition of data (delivery, pressure, density) for the possible of a subsequent processing of the data recorded,

• Drawing up of reports concerning the works carried out and relevant evaluation.

• Drawing up a final well report.

A-1-SS-1729 5.1

4.2. Personnel

4.2.1. The Contractor shall supply professional curricula for all personnel he intends to use, indicating background, training and work experience.

A-1-SS-1729 5.2

4.2.2. All personnel involved in offshore operations shall hold a survival at sea certificate issued by a Company-approved Organisation or Institute.

A-1-SS-1729 5.2

4.2.3. An operator is required to have a adeguate skill acquired through an appropriate training course and with at least five years of field experience

A-1-SS-1729 5.2.1

4.2.4. Helper is required to have an adequate skill acquired through an appropriate training course.

A-1-SS-1729 5.2.2

4.2.5. Contractor will guarantee availability of a technical supervisor from a base close to the area of operation.

A-1-SS-1729 5.2.3

4.2.6. Contractor shall provide a laboratory technician to perform the required tests on cement, cement additives and cement slurry.

A-1-SS-1729 5.2.4

4.3. Equipment

4.3.1. The design of equipment and units shall ensure safety operations. A-1-SS-1729 5.3

4.3.2. Cement Pumping Unit must be provided with:

• Twin triplex pumping units for pumping the cement slurry.

• The pumping unit working pressure shall be 10,000 psi and 500 HHP.

• The engines will be equipped with spark arresting air filters and air inlet shut-off valve

• The unit shall include two displacement tanks of 1,500/1,600litres capacity each.

• The tanks will be provided with appropriate level gauges calibrated in liters.

• Cement pump pressure gauge 15,000 psi fitted with a pre-select pump cut out system.

A-1-SS-1729 5.3.1

4.3.3. Recirculation Mixing System shall grant mixing of the cement slurry and its recirculation before it is pumped into the well.

It will include a 1,300-1,500ft basin divided into two parts, each supplied with a mixer.

A-1-SS-1729 5.3.2

4.4. Batch Mixer shall grant the ‘surface’ mixing of determined quantities of cement slurry, spacers and/or other fluids. It will consist of tanks of capacity ranging from 3 to 30m3, each one self sufficient, provided with agitators, centrifugal pump and gauge to measure the pumped quantities.

A-1-SS-1729 5.3.3

4.5. Documentation

4.5.1. Contractor will prepare and submit for approval, before the execution of each service, a detailed ‘Operations Program’.

A-1-SS-1729 6.2

4.5.2. After the execution of the service, Contractor shall provide to Company Operations a ‘Job Report’

A-1-SS-1729 6.3

4.5.3. At the end of the operations, Contractor shall prepare the final report which shall include all the ‘Job Report’, ‘Operation Program’ and final considerations and suggestions, reason for the deviation from the program

A-1-SS-1729 6.4

Reference List:

‘Standard Specifications for Drilling and Completion Fluid Services’ STAP-A-1-SS-1719

‘Technical Specifications for Surface Logging’ STAP-A-1-SS-1722

‘Cementing and Pumping Service for Drilling Completion

and Workover Activity’ STAP-A-1-SS-1729

‘Drilling Contract ‘Drilling and Workover safety requirements. Appendix ‘E’’

‘Drilling Contract ‘Personnel to be provided by Contractor. Appendix ‘A’ section ‘B’


1. BUDGET Reference

1.1. The Well Area Department, requested by the ‘Project’ or ‘Exploration Manager’, will make cost estimation of the planned well (based on the best information available at the time), this will be inserted into the yearly budget.

2. COSTS Reference

2.1. Before starting the activity, the Well Area Department, requested by the

‘Project’ or ‘Exploration Manager’, will make a cost estimation of the forthcoming well. It will be split by class of cost, based on the progress chart included in the drilling (or completion, or workover) program, on the selected rig rates and on the other acquired contracts.

2.2. The Estimated Cost shall include:

• Materials (casings, wellhead, mud, etc.)

• Services (contractors)

• Standard costs (supply vessels, helicopters, transports, etc.)

• Logs (from District Geological Department)

• Supervision and operative base costs.

2.3. ‘Project’ or ‘Exploration Manager’, after receiving the Estimated Cost, will check the conformity with the original budget (at this point a budget revision may be made) and will start the procedure for the Job centre opening.

2.4. After Job Centre opening the Estimated Costs can be input in S3C (if available)

2.5. Draw-up a Progress Cost Chart (depth versus cost) and follow up the actual daily costs comparing the same with the previously estimated costs, in order to evaluate the activity performance.

2.6. Follow up daily and cumulative costs and compare with budget.

In document Drilling and workover best practices (Page 28-33)

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