Planning

A. Planning Cementing Engineer 1. Ensure cement samples and additives used for testing are representative of the cement to be used for the job.2. Ensure that adequate cementing products are at the rigsite before running casing.3. Involved in preparing cementing programme with Halliburton HMD and Drilling Engineer.4. Halliburton HMD to send a draft programme, no Cementing Operations Responsibilities Checklist

The Cement Programme gives a detailed description of any non standard operations which are proposed. It shall also outline risks involved and precautions to be taken. (Reference shall be made to the Drilling Programme as appropriate.) Well Status Previous Casing The Cement Programme shall include: diameter (inches) weight (lbs/ft) grade coupling shoe measured and vertical Contents of the Cement Programme

Planning and supervision is crucial in cementing operations. This article describes the key responsibilities for the Drilling Supervisor, Cementing Engineer, Mud Engineer and Drilling Contractor. Operations Engineer ensure cement, mixwater and additive samples are sent in time to the service company for testing check that the cementation proposal meets the objectives of planned cementing operation Responsibilities during cementing

Spacers are any fluids other than cement slurry or mud, pumped ahead (preflush) or behind (postflush) the cement slurry. Preflushes are used to: prevent contamination of cement slurry with mud improve mud displacement and mud cake removal. Postflushes are used to prevent: the plug from spinning when it will be drilled out (cement on top) Spacers for cementing

This article presents guidelines for: 1. Treatment of Mud Prior to Cementing, 2. Hole Volumes and Slurry Volume Calculations, 3. Circulation Test before the job. Treatment of Mud Prior to Cementing Before pulling out of hole to run casing, the hole shall be circulated clean (150 % of casing contents) until there are no further Cementing Job – Preparation Guidelines

All slurry and spacers are designed and tested at the Cementing Contractors Laboratory. Samples of cement (10kg), additives and mixwater must be sent from the well site to the laboratory for this purpose. Testing is carried out according to API Spec 10. General Guidelines Bulk cement shall be sampled for testing purposes. After retaining a Cement Testing – QA/QC

The Cement Programme gives a brief explanation as to the objectives in setting casing, i.e.: isolate hydrocarbons isolate different pressure regimes provide a pressure conduit of full integrity for drilling and completion allow installation of BOP, completion etc. General Preparation Guidelines The following guidelines should be applied to the preparation of the Cement Programme: The Cement Programme Preparation

The additives to be used and their concentration shall be decided by the Cement Contractor, after testing the slurry using representative samples of cement, additives and mixwater despatched from the rig. This has to be then approved by the Operations Engineer and Superintendent. No deviationfrom the recipe, as determined by the Cementing Contractor is permitted Cement Additives (function and definition)