Prior to pulling stuck drill pipe or stuck casing, carry out the following preparations: 1. Ensure that all surface pulling equipment is in good working condition. Do not exceed the maximum allowable safe working rating of the weakest link in the pulling equipment. 2. Check the Martin Decker weight indicator and the dead-weight anchor as … Pulling Stuck Pipe
The causes of tight holes include: Insufficient inhibition, Mud weight, Lubricity and Hole cleaning. All these factors are important and comparisons should be made between wells with and without problems, to identify the critical factors. Tight hole is mainly encountered when coming out of the hole. It occurs where sometimes a fresh hole has been … Tripping Procedure in tight hole
Main acronyms/ abbreviations used in the oil industry A AH Along hole API American Petroleum Institute B bbl(s) Barrel(s) bbls/min Barrels per minute BDF Below drill floor BHA Bottom hole assembly BHS Bottom hole sample BOP Blow-out preventer bopd Barrels of oil per day BPM Back pressure manifold bpm Barrels per minute (also bbls/min) BS&W … Acronyms and Abbeviations
The first actions taken when the drillstring becomes stuck have a great influence on the chance of success. The information detailed belowl give guidance to the correct early response when the pipe becomes stuck. Effective Pull On Stuck Pipe When determining the pull on differentially or mechanically stuck drillpipe, the actual weight of the string … Effective Pull On Stuck Pipe
1. introduction The purpose of this outline program is to set the framework for the operations. This programme will prepare the existing well, for a forthcoming near horizontal multilateral side-track which is due to begin immediately upon the successful completion of the abandonment. The existing completion will be retrieved from the wellhead down to the … Multilateral drilling programme
Directional Drilling no.1 After a survey in a deviated well it is apparent that the target will be missed. A correction run must be made but it is uncertain whether the target can be reached within the along hole distance remaining. Check whether the correction run will allow the borehole to pass through the centre … Directional Drilling Exercices
Drilling Rig on Pre-Installed Piles and Modules is one of the drilling rig design concepts for shallow water environments. 1. Water depth range: 0 – 3 m. 2. Low environment impact 3. Particularly adapted to shallow water when ice is land fast. Platform can be erected in the winter season using Arctic equipment. For deeper … Drilling Rig on Pre-Installed Piles and Modules for shallow water depth
Shallow Draft Jack-Up is one of the rig design concepts for offshore drilling in shallow water environments. 1. Water depth range: 5 to 100m. Shallow water capability from fully retracting spud cans and possibly require attachment of additional floatation elements. 2. Environmental Impact Potentially low, although dredging may be extensively required which would be environmentally … Shallow Draft Jack-Up
The following table lists those problems commonly encountered in drilling extended reach (ERD) and horizontal wells and recommendd precautions. Inefficient Hole Cleaning & Reduced Borehole Stability Maintain high annular velocity, use turbulent flow pattern wherever possible Use low rheology fluid (horizontal sections) Use extended rheology muds for high angle 12.1/4in and larger hole sections Pump … Problems encountered in drilling extended reach and horizontal wells
This article describe the well status requirements for Onshore Rig Moves. 1. Well Status Prior to Rig Move from Old Location The following barriers shall be in place in a development well: annuli full completions installed and tested Xmas tree installed and tested. Annuli All annuli shall have been topped up and all valves closed … Onshore Rig Moves – Well Status