Pre-running procedures Always pre-plan Ensure proper layout on the rig rack Joints need to be laid out properly especially when dealing with different weights of casing in one run. Clean the threads. Once the thread protectors are removed the threads should be cleaned. The tubular interiors should be inspected. Handling procedures Use thread protectors Use … Continue reading Running Casing
Tag: Well-bore
A Guide to Reaming
Always Plan your tripping schedule: Record tight spots from previous trips Know the wellbore geometry; the deviation, doglegs etc. maintain constant communication with your directional personnel. Despite pulling up always be prepared to run downward. This may be needed to free the pipe after a connection. One example is the consistent execution of 200 to … Continue reading A Guide to Reaming
A Guide to Hole Cleaning
Hole cleaning is an essential part of drilling. It ensures that the material that is drilled is effectively and efficiently being removed from the wellbore. Failure to achieve proper hole cleaning can result in a host of wellbore problems and issues. Indications of poor hole cleaning: Excessive pull on trips High rotary torque Lowered rate … Continue reading A Guide to Hole Cleaning
Perforations
This is done to provide affective flow communication between reservoir and wellbore. The perforating jobs is irreversible and as such requires good planning. The shaped jet perforator is mechanically simple and reliable, with generally higher performance. Suits a wider range of completion needs. The wireline methods have offered depth control, selective firing speed and low … Continue reading Perforations
Effect of bit on Rotary Assembly
Roller Cone – makes very little difference on the build, hold or drop angle. This type of bit does influence the walk rate. They have a right walk tendency, long tooth bits exhibit this more than short tooth bits. PDC – no walk occurs. They do affect the inclination. The gauge length of the … Continue reading Effect of bit on Rotary Assembly
Cementing Additives and Mechanisms
There are 8 general categories of additives. Accelerators – Reduces setting time and increases the rate of compressive strength build up. Retarders – Extends the Setting time. Extenders – Lowers the density. Weighting Agents – Increases density. Dispersants – Reduces viscosity. Fluid Loss Control Agents. Lost Circulation Control Agents. Specialty Agents. Accelerators Can be … Continue reading Cementing Additives and Mechanisms
Replaceable Sleeve Stabilizer
Liner Completion
Stabilizer-Integral Bladed
Conventional Completions
Casing Flow; means that the producing fluid flow has only one path to the surface through the casing. Casing and tubing Flow; means that the there is tubing within the casing that allows fluid to reach the surface. This tubing can be used as a kill string for chemical injection. The tubing may have … Continue reading Conventional Completions
Horizontal Completions
Formation considerations Homogenous Heterogeneous Naturally Fractured Homogenous-found in heavy oil sands. Easy to accommodate in completion and don't require wellbore segregation. Can be treated with the entire wellbore exposed using coiled tubing or perforated technology. Heterogeneous-reservoir quality and pressure vary between sections of the wellbore. These segments of the wellbore need to be isolated to … Continue reading Horizontal Completions
Electric Submersible Pump (ESP)
This a electrically powered pump that is inserted into oil-well bore to facilitate the lifting of the well bore fluid. The pump as its name implies is electrically powered and submerged in the fluid. The operation of the pump as with all pumps creates a pressure difference allowing the fluid to flow upward out of … Continue reading Electric Submersible Pump (ESP)