Slickline BOP (Blowout Preventer)

A slickline BOP (Blowout Preventer) is a specialized type of BOP that is specifically designed for use with slickline operations. Slickline is a thin, un-insulated wire that is used to perform a variety of well intervention tasks such as setting and retrieving plugs, measuring depth, and running tools. A slickline BOP typically has the same functions as a coiled tubing BOP, which is designed to seal and control the well in the event of an emergency, but is designed to be used with slickline instead of coiled tubing.

The typical slickline BOP has several key components, including: • The body: The body of a slickline BOP is the main structure of the device that houses the electronic and mechanical systems. It is typically made of steel or aluminum and is designed to be watertight and to withstand the pressure of the well. • The control system: The control system of a slickline BOP is the component that allows the operator to control the various valves, actuators, and rams that make up the BOP. It typically consists of a control console, a control panel, and a series of control lines that connect the control system to the various components of the BOP. • The rams: The rams of a slickline BOP are the components that are used to seal the wellbore in the event of an emergency. They typically consist of a series of steel or composite rams that can be closed to seal the wellbore around the slickline. • The shear rams: The shear rams of a slickline BOP are the components that are used to cut the slickline in the event of an emergency. They typically consist of a series of steel or composite rams that can be closed to cut the slickline.

The engineering specifications for a slickline BOP are: • Working pressure rating: typically from 5,000 to 15,000 psi • Size range: typically from 2" to 4" • Standard: API 16A (American Petroleum Institute)

A slickline BOP (Blowout Preventer) is a specialized type of BOP that is specifically designed for use with slickline operations. It is designed to seal and control the well in the event of an emergency, but is designed to be used with slickline instead of coiled tubing. A slickline BOP typically consists of a body, control system, rams, and shear rams. The body is typically made of steel or aluminum, and it is designed to be watertight and to withstand the pressure of the well. The control system is the component that allows the operator to control the various valves, actuators, and rams that make up the BOP. The rams and shear rams are the components that are used to seal and cut the wellbore in the event of an emergency. The slickline BOP is an essential piece of equipment for slickline operations, and it is critical to the safety of the crew and the environment.

Service Rig (Workover Rig) A service rig, also known as a workover rig, is a type of drilling rig that is used in the oil and gas industry to perform maintenance and repair work on existing oil and gas wells. These rigs are designed to be mobile and versatile, and they are typically used to perform a wide range of tasks, including well completion, workover, and well servicing operations.

OCTG Tubing Oil Country Tubular Goods (OCTG) tubing is a type of pipe that is used in the oil and gas industry to transport oil, natural gas, and other fluids from the wellhead to the surface. These pipes are typically made of steel and are designed to withstand the high pressures, temperatures, and corrosive environments of the oil and gas industry.

The SCSSSV Isolation Question In some wells with surface controlled subsurface safety valves a landing nipple is used to lock and operate a wireline retrievable downhole safety valve. The wireline retrievable valve can be pulled to allow nearly full-bore access to the wellbore, however it is a question as to whether an isolation sleeve should be run or not. One of the key advantages for installing a wireline retrievable subsurface safety valve is that it can be pulled and allow larger tools to be run on wireline. However, the insert valve has to form a seal with the inside of the tubing in a safety valve landings nipple. This is achieved by running an upper and lower seal assembly made of chevron seals (or o-rings) which form a seal for the hydraulic oil in the control line to pressure up the safety valve. When wirelining, the wire will ride in a certain location (low side) and can create a groove in this sealing area. This groove can lead to the packing elements of the insert valve not forming a hydraulic seal and rendering the valve inoperable. In this particular well, there was a history of sand production, and the completion was more than 40 years old, which are both cause for concern when running slickline across a SCSSSV nipple profile. It was decided during job design to install an isolation sleeve across the landing nipple to prevent damaging the sealing profile.

Sources list:
Image from https://eest-es.com/our-services/well-intervention-service/
Image from https://www.youtube.com/watch?v=pyxcap5LANA

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