What is Rigless intervention?

A well-intervention operation conducted with equipment and support facilities that precludes the requirement for a rig over the wellbore. Coiled tubing, slickline and snubbing activities are commonly conducted as rigless operations.

What is heavy well intervention?

Heavy interventions—also referred to as workovers—require the rig crew to remove the wellhead and other pressure barriers from the well to allow full access to the wellbore. These operations require a rig to remove and reinstall the wellhead and completion equipment.

What is subsea well intervention equipment?

The EIA series subsea well control equipment (WCE) is an integral component of the lower wellhead riser package. EIA actuators are well-control components used during a subsea well intervention. It features a single-line hydraulic system and an automatic, wedge-type, “autolock” actuator system.

Which of the following requires a well intervention?

Explanation: Shutting off flow from a high water cut interval requires Well Intervention and need immediate measures. Workover is a well intervention process due to some problems faced. Basically, it is major maintenance or remedial treatments on an oil or gas well.

What special equipment is used for an invasive intervention?

Rigless techniques for well intervention are wireline, coiled tubing (CT) and hydraulic workover (HWO) services that do not require the use of a conventional workover rig and have the capability of performing downhole applications in live (under pressure) wells.

How does a snubbing unit work?

Snubbing is a type of heavy well intervention performed on oil and gas wells. It involves running the BHA on a pipe string using a hydraulic workover rig. Unlike wireline or coiled tubing, the pipe is not spooled off a drum but made up and broken up while running in and pulling out, much like conventional drill pipe.

What are well intervention operations?

A well intervention, or well work, is any operation carried out on an oil or gas well during, or at the end of, its productive life that alters the state of the well or well geometry, provides well diagnostics, or manages the production of the well.

What does well intervention do?

Well intervention is the ability to safely enter a well with well control for the purpose of doing a number of tasks other than drilling. As technology is developed, water depth increases, well head design evolves and well construction changes, intervention also evolves and demand grows.

What does it mean when you snub someone?

snub Add to list Share. To snub is to ignore or refuse to acknowledge someone. If you want to snub your former best friend, you can refuse to even look at her when you pass in the hallway. When you snub someone, you deliver an insult by pretending to not even notice someone that you know.

What is definition of snubbed?

1 : to check or stop with a cutting retort : rebuke. 2a : to check (something, such as a line or chain that is running out) suddenly especially by turning around a fixed object (such as a post or a cleat) also : to check the motion of by snubbing a line snub the anchor.

What should there be prior to any well intervention or workover operations?

Before any workover, the well must first be killed. The workover begins by killing the well then removing the wellhead and possibly the flow line, then installing a B.O.P commonly known as a blowout preventer, then lifting the tubing hanger from the casing head, thus beginning to pull the completion out of the well.

Why is subsea well intervention required?

A well may require intervention due to restrictions in flow, changes in reservoir characteristics, sand production, mechanical failure, or to access additional hydrocarbon pay zones.