Reamer shoes are specialized shoes that are attached to the bottom of a casing or liner string. They are designed to facilitate the descent of the casing or liner to the planned total depth (TD) in the wellbore, particularly in challenging conditions. Reamer shoes often incorporate cutting elements, such as tungsten carbide or polycrystalline diamond compact (PDC) cutters, which are used to remove obstructions and enlarge tight spots in the wellbore.
We have a question asking about is it ok to Pump Synthetic-Based Mud (SBM) with Cement Unit?
Therefore, this article aims to address critical concerns that must be considered to ensure the integrity of equipment, operational efficiency, and environmental compliance. The utilization of cement units for pumping Synthetic-Based Mud (SBM) during displacement operations presents several technical and operational challenges.
The cement unit (courtesy of SLB)
1. Valve Compatibility Continue reading
Squeeze cementing represents a critical process in the oil and gas industry, where a cement slurry is squeezed through perforations in casing to create a seal in specific locations, bridging undesired gaps. It is a common misconception that the cement penetrates the pores of the rock. Instead, the cement slurry dehydrates against the formation walls, forming a seal cement filter cake. It must be clear that cement does not infiltrate the pores of the rock. Given that cement slurries have particles with a mean size ranging from 20 to 50 microns, the permeability of the formation must be between 2-100 darcies for cement grains to penetrate the formation successfully.
To achieve a successful oil well cementing and ensure zonal isolation in oil well cementing, efficient mud displacement is crucial. Inadequate mud removal can lead to problems like cement channeling, permitting the intrusion of hydrocarbons and communication between permeable zones. The following factors are essential for ensuring a good cement bond:
Cementing operations in the oil and gas industry are a critical component of well construction and integrity. Proper casing and cementing hardware play a crucial role in ensuring the successful execution of these operations. In this article, we will explore the various equipment used in cementing operations, including guide shoes, float collars, centralizers, cement wiper plugs, and multi-stage collars.
casing and cement hardware
Guide Shoes and Float Shoes: Continue reading
