Factors to be considered Well conditions. Compatibility with other downhole equipment. Customer preference. It must be recognized that oftentimes, several different types of packers may be successfully used in the same installation. Many times, a packer may be selected by the operator because he has experienced good success using it in the past. Economics. Economics …
Permanent packers as the name implies are well packers, when set, cannot be retrieved from the well. General characteristics common to permanent packers include: Components of Permanent Packers: Typically, They will have specific components according to their manufacturer and their design, but most of the time you shall find certain items in each permanent packer …
This job description of a derrickman showcases the significant duties, functional responsibilities, skills, and knowledge of various drilling equipment required. Derrickman— in the oil and gas field— assists the Driller in smooth and safe work practices like rigging, laying out the tubing, mud procedures, and other drilling operations. Let’s jump into it; You might be …
The drilling program is the engineering design for the process of drilling and completion of the wellbore. The plan includes many data including well trajectory, casing design, mud program, well control, Drilling Bit Selection, geological data, formation gradient estimations, economics, and special procedures that shall be followed during the construction of the well. Although drilling …
The Variable Density – VDL Log in essence is a further refinement of the conventional CBL (Cement Bond Log) by including a full waveform display, presented on the log as ‘a variable intensity’ in shades between black and white, representing maximum and minimum in amplitudes. It is used mainly in the interpretation of the cement-to-formation …
The Cement evaluation tool (CET) uses ultrasonic acoustic pulses from a rotating transducer and measures radially instead of axially. The transmitter emits ultrasonic pulses between 200 and 700 kHz and measures the received ultrasonic waveforms reflected from the internal and external casing interfaces. The rate of decay of the waveforms received indicates the quality of …
Prior to cementing in drilling oil & gas job, laboratory testing must be carried out to ensure that the correct recipe is used considering all of the existing conditions and cementing additive properties (oil well cement properties) according to API Recommended Practise. Testing must be conducted on the actual on-site material to be used. The …
Coiled Tubing Drilling (CTD) has evolved rapidly since its first operations in 1992. The main motivation for drilling with coiled tubing was the presence of large diameter CT which makes it easy to deliver the required hydraulic horsepower to the downhole. This horsepower is mandatory for hole cleaning, transferring cuttings in the annulus, and providing …
This article covers all formulas that are used while well control situations on the drilling rig ( Check also: Drilling rigs Types). Pressures Formulas HYDROSTATIC PRESSURE (all depths TVD): Constants: PRESSURE, psi = Mud Weight x Constant x Depth, (TVD) PRESSURE GRADIENT, psi/ft = Mud Weight x Constant OR = Pressure, psi ÷TVD, ft MUD …
Well cementing plays a very important role in the construction, completion, and abandonment of wells since the cement performs vital functions in supporting the casing and drilling wellhead equipment. The casing cannot perform the functions it is designed for, described elsewhere unless effectively cemented in place. The cement forms an impermeable barrier to the passage …