Drilling through coal formations, especially in long tangent wellbores, presents a unique set of challenges for the oil and gas industry therefore we need best practices for drilling coal formations. Coal seams are notorious for their potential instability, abnormal formation pressures, and propensity for swelling and sloughing when exposed to water-based drilling fluids. These challenges can lead to various drilling problems, such as stuck pipe incidents, lost circulation events, and well control situations, ultimately compromising the safety and efficiency of drilling operations. Coal over ..read more

In this article, it describes type of mechanical cutters used for fishing operation. When running fishing tools to retrieve stuck or damaged downhole equipment, the pipe or casing often needs to be cut or parted. This allows the fishing tools to latch onto and retrieve the fish. If wireline tools are available, the pipe can be parted using wireline cutting methods to minimize rig time. However, when wireline is not practical, the pipe must be cut using mechanical cutters run on the end of a workstring. Internal Mechanical Cutters Mechanical Internal Cutter One common method is an internal me ..read more

When abandoning an oil or gas well, performing salvage operations, or facing situations with low fluid levels, heavy drilling mud, or cost constraints, operators often turn to a specialized tool called the explosive jet cutter or jet cutter in short. This shaped charge device runs on an electric wireline and is designed to sever pipes in a controlled and efficient manner. The jet cutter’s plastic explosive features a modified parabolic face with a circular shape that conforms to the pipe it needs to cut. This unique design allows for a precise and focused detonation. Upon detonation, the shape ..read more

In the oil and gas industry, fishing operations refer to the procedures used to retrieve or remove stuck or failed equipment from the wellbore. These obstructions can include stuck pipe, drill collars, parted tubulars, stuck packers, parted or stuck wireline, and other lost or failed equipment. When such conditions develop, drilling, workover, and completion operations must cease until the obstruction is removed, allowing normal operations to resume. Obstructions in the wellbore can result from various factors, such as human error, unknown hole conditions, metal fatigue in tubulars, junk in th ..read more

Table of Contents Toggle What is backoff operation? The Method of Backoff Operation: Important Considerations: Additional Uses of String Shots: What is Outside Backoff ? Here’s how it works: Important points to note for outside backoff: What is backoff operation? The backoff operation is a procedure used in oil and gas well fishing jobs to unscrew a stuck pipe string at a specific threaded joint above the stuck point. This method is particularly popular for drill pipes and drill collars because it leaves a threaded connection at the top of the remaining pipe, making it possible to s ..read more

Table of Contents Toggle Assess Situation Communicate Gather Data A Systematic Approach To Solutions Pipe Tally Management Avoid Rotating The Fishing String Caution With Conductor Lines The Role of A Fishing Tool Supervisor Successful Fishing Operations are required a lot of effort from every party. Therefore, we provide the guideline which will help you get higher chance of success to fish your tool out of the hole. Fishing operations demand adherence to specific guidelines and protocols applicable across various scenarios. Challenges like downhole issues, equipment malfunctions, geologi ..read more

An annular rubber element stands as a pivotal component within an annular blowout preventer (BOP), playing a crucial role in safeguarding oil well drilling operations by preventing the uncontrolled release of formation fluids, such as oil, gas, or water, from the wellbore. When to Change Annular Preventer Element Crafted from a high-performance elastomer compound, these elements are engineered to withstand the demanding conditions of the downhole environment. Subjected to high pressures, extreme temperatures, and exposure to corrosive fluids, they are strategically placed around the wellbore ..read more

Drilling for oil and gas can be a hazardous endeavor, with unexpected pressure changes posing a significant threat. Fortunately, geological data can be a powerful tool in predicting these risks and ensuring a safe and successful operation. This article explores some of the most common geological features that can lead to abnormal pressures and how to identify them based on available data. 1. Fault Lines: Faults are fractures in the Earth’s crust where rock layers have shifted. Crossing a fault during drilling can cause sudden pressure changes, leading to uncontrolled releases of fluids known ..read more

Successful installation of a casing liner system demands a comprehensive analysis of its intended application, considering both short-term and long-term factors. The following key considerations for designing and installing casing liner system must be addressed are as follows: Application Identification: Determine the specific application—drilling, production/completion, tieback stub, or tie-back—and select a liner system falling into one of these categories. The final design may vary, but initial categorization is crucial. Liner Size, Weight, Grade, and Thread Type: Consider the following c ..read more

A flat bottom mill is a specialized downhole milling tool extensively employed in the oil and gas sector to grind and eliminate undesirable elements, commonly referred to as “junk,” from a wellbore. This type of milling tool is widely recognized for its versatility, capable of handling a diverse range of junk items such as squeeze tools, packers, tubing, bridge plugs, and bit cones. Key characteristics of a flat bottom mill include a flat, abrasive bottom face typically coated with tungsten carbide or other hard, wear-resistant materials. This feature enables efficient grinding and breakdown ..read more