It is a critical component in the circulating system of a drilling rig. It delivers drilling fluid (mud) under high pressure down the drill string and back up the annulus. The performance and reliability of the pump are essential for maintaining circulation, wellbore stability, and efficient drilling operations. Here’s a detailed breakdown of the mechanical […]

Coring is the process of extracting a cylindrical sample of rock (called a core) from a subsurface formation during drilling operations. This core provides direct, unaltered physical evidence of the formation and is used for detailed geological, petrophysical, and reservoir analysis. Types of Coring: Purpose of Coring:-Analyze porosity, permeability, and fluid saturation.-Identify lithology and rock […]

The Schlumberger XL-Rock sidewall coring tool is an advanced wireline-deployed tool designed to retrieve high-quality core samples from the reservoir rock in openhole wells. It allows geologists and petrophysicists to analyze the actual rock matrix and pore structure, helping to better characterize the reservoir. This tool is especially useful when conventional coring is not feasible […]

During TOOH operations, the mud seen flowing from the wellbore is known as trip flowback or annular flowback. This occurs due to the piston effect: as the drill string is pulled out, it displaces mud in the annulus, causing it to flow back to the surface. In this case, the flow appears consistent and steady, […]

Leakage: There is clear evidence of fluid discharge oil spill from a connection point — possibly from:-The wellhead itself,-A valve or flange connection.-The leak is pressurized — indicating it could be from a high-pressure line or seal failure.-The escaping fluid appears to be accumulating near the base but doesn’t seem to be flowing offsite visibly […]

Hydrogen Sulfide (H₂S) is a highly toxic and flammable gas commonly encountered in oil and gas drilling—especially in sour fields like those in parts of Iraq and Kurdistan.Colorless but has a rotten egg smell at low concentrations.Heavier than air, so it tends to accumulate in low-lying areas.Exposure at even low ppm levels is hazardous; concentrations […]

(Positive Displacement Motor) drill bit assembly, the objective is to ensure that all downhole components — especially the PDM and bit — are functioning properly before drilling resumes. Here’s a breakdown of why the function test is important and how it’s performed: Perform a Function Test on a 9 5/8 inch PDM Drill Bit Function […]

Hydraulic fracturing, commonly known as fracking, is a well stimulation technique used to extract oil and natural gas from deep underground formations, particularly from tight formations like shale, sandstone, and coal beds. The process involves injecting high-pressure fluid into the rock to create fractures, allowing hydrocarbons to flow more freely to the wellbore. Key Steps […]