With the advent of steerable systems, some directional wells are planned and drilled with complex profile types involving 3-dimensional turns. Generally, this happens mainly in the case of re-drills, where old wells are sidetracked and drilled to entirely new targets. However, these complex well paths are harder to drill, and the old adage that “the …
In oil and gas wells, hole deviation is a common drilling problem caused by a number of factors. This deviation results in the wellbore not being perpendicular to the target formation. Also, this can lead to a number of issues, including reduced productivity, lost circulation, and even well blowouts. We can control hole deviation by …
A back pressure valve (BPV) is a type of valve that we use in drilling & workover rigs to regulate the flow of fluids in a wellhead. Its design allows fluid to flow in only one direction and prevents fluid from flowing back into the wellhead. Application Of Wellhead Back Pressure Valve The most critical …
When it comes to oil and gas drilling, one of the most critical pieces of equipment is the wear bushing or the bore protector. This small, yet essential component helps to protect the drill string from wear and tear and ultimately helps to keep the entire operation running smoothly. But what exactly is a wear …
This is the more widely employed and reliable method. The design of SCSSV – surface control subsurface safety valve is typically aiming to operate independently of well conditions. This is because the downhole valve relies on hydraulic pressure. The pressure is supplied by a small 1/4″ monel control line strapped to the tubing to keep …
A tubing-retrievable subsurface safety valve (TRSCSSSV) is run as an integral part of the completion string. The equipment requirements for the oil and gas TRSV system are: the TRSV assembly, hydraulic control line and fittings, and a hydraulic control manifold. Like the wireline retrievable safety valve WRSV, the control line is attached between the TRSV …
After installation of the completion string, we can run, locate & lock a wireline retrievable subsurface safety valve WRSV into a safety valve landing nipple (SVLN) before production. The SVLN (valve nipple) is integral to the tubing string. The valves typically open due to the hydraulic pressure acting on a piston which moves a flow …
A subsurface safety valve (SSSV) is a downhole safety device installed in a well that can be closed in emergencies. An emergency may arise on or around a well from equipment failure, human error, collision with an offshore facility by a third-party vessel, fire, leaks, or sabotage. Why Do We Need Subsurface Safety Valves? The …
The traveling block (one of the rig components) is a diamond-shaped block containing several sheaves, always less than those in the crown block. The drilling line is wound continuously on the crown and traveling blocks, with the two outer ends, wound on the hoisting drum and attached to the deadline anchor. Traveling block specs are …
The Crown Block is one of the rig components (hoisting system) composed of a fixed set of pulleys (called sheaves). The location of this stationary block is mainly at the top of the rig derrick or drilling mast, where the drilling line is threaded. The companion blocks to these pulleys are the traveling blocks. Using …