What is rigless well intervention?

1. n. [Well Completions] 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 subsea intervention?

In short, subsea or platform well intervention is the practice of intervening on a well to repair it and / or stimulate production to enable profitable operations to continue. With the oil price levelling out at ~$55-65, we’ve seen an increased focus on well intervention as an option for operators of all sizes.

What is subsea well intervention equipment?

It features a single-line hydraulic system and an automatic, wedge-type, “autolock” actuator system. The autolock system secures the rams in the closed position in the event of a hydraulic failure or an emergency situation that requires disconnecting from the subsea wellhead.

What is well intervention in oil and gas?

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 is coiled tubing operation?

Coiled tubing (CT) refers to a continuous length of small-diameter steel pipe and related surface equipment as well as associated drilling, completion and workover, or remediation, techniques. Coiled tubing oilfield technology was initially developed for working on live, producing wells.

What is snubbing unit?

Snubbing units, also referred to as hydraulic workover units (HWU), are used to perform well intervention on live or dead oil and gas wells. They are used to drive pipe into a well bore and overcome well pressure that is preventing conventional drill rig operations.

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.

What is well intervention equipment?

• 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. • Well intervention historically was done with drill rigs, with an 18-3/4” BOP and 21” marine riser as the only means of well access with well control.

What is the difference between well intervention and workover?

Workover is an important part of the field development costs These oilfield maintenance operations aim at optimizing oil or gas production and keeping it to satisfactory levels. Well-intervention operations mean essential investments in the life of the well.

What is the advantage of using coiled tubing in interventions?

Significant Advantages Coiled tubing can help the operator avoid the risk of formation damage inherent in killing a well by allowing continuous circula- tion during well intervention operations. These advantages may yield sig- nificant cost savings over conventional drilling or workover techniques.

What is coil tubing equipment?

A coiled tubing equipment/ unit primarily comprises of a tubing reel, an injector to guide and inject the tubing into the wellbore, control console comprising of all controls and instrumentation, a power pack and a pressure control system.