Author: GOSCO Energy
Underbalanced Drilling (UBD)
UBD is a procedure used to drill oil and gas wells where the pressure in the wellbore is kept lower than the static pressure of the formation being drilled. As the well is being drilled, formation fluid flows into the wellbore and up to the surface. This is the opposite of the usual situation, where […]
TIGHT HOLE STUCK DRILLING RIG
Overpulls/ Stuck Pipe In Surface Hole If any tight hole is experienced when drilling with water the followint actions should be taken to prevent stuck pipe: When heavy overpulls are experienced, and the above precautions have been taken, but the weight indicator regularly indicate a drop-off in overpulls and then an increase again, do not […]
Drilling Stabilizers
Drilling Stabilizers is a crucial tool in the oil and gas industry, play a pivotal role in ensuring successful drilling by mitigating challenges related to hole deviation, vibration, and overall drilling accuracy, are specialized devices employed in drilling operations to counteract the potential deviation of the borehole from its intended path. These cylindrical tools are […]
Coiled Tubing Kickoff
A coiled tubing kickoff typically refers to the process of using coiled tubing (CT) to initiate or assist in the drilling of a new wellbore or sidetrack. This method is often used in directional drilling, well interventions, and re-entry operations. Key Steps in a Coiled Tubing Kickoff:1.Pre-Job Planning & Design:Assess well conditions and objectives.Select appropriate […]
What is Perforation
Perforation is the process of creating holes in the casing or liner of a wellbore to allow oil or gas to flow from the reservoir into the well. 1.1 After drilling a well, steel casing is installed and cemented in place to isolate different geological formations.1.2 However, to enable production from the reservoir, holes must […]
Basket Grapple Overshot
A basket grapple overshot is a specialized tool used in oil and gas wellbore fishing operations to retrieve stuck or lost objects, such as drill pipe, tubing, or other downhole equipment. It is a type of overshot fishing tool, meaning it is designed to latch onto and remove obstructions from the wellbore by “overreaching” the […]
Subsurface Safety Valve (SSSV)
A Subsurface Safety Valve (SSSV) is a safety device installed downhole in an oil or gas well to prevent uncontrolled flow of fluids in the event of an emergency. It can be operated from the surface (Surface-Controlled SSSV) or by downhole conditions (Subsurface-Controlled SSSV). Key Features and Functions: Emergency Shutdown: The primary function of an […]
Coiled Tubing Operations Manual
The global oil and gas industry is using coiled tubing for an ever-increasing array of well intervention projects. Coiled tubing offers a number of operational and economic advantages, including: live well intervention, elimination of well kill and potentially damaging heavy-weight kill fluids, reduced operational footprint, horizontal intervention, and the ability to intervene without a rig. […]
Schlumberger Dowell Coiled Tubing Client School Manual
This manual has been prepared to complement the information provided through the presentations and discussions held during a Schlumberger Dowell Coiled Tubing Client School. The technical information within this manual is intended to provide a basic understanding of the equipment, tools, processes and design requirements associated with modern coiled tubing operations. Comprehensive and detailed information, […]