Well Intervention - Revision Quizzes

Well intervention can be carried out in: 

• live wells only 

• dead wells only 

• both live and dead wells

• none of the answer

Which wireline operation allows real-time recording of pressure and temperature?

• E-line

• Slickline

• E-line and slickline

• E-line, slickline and braided line

Which of the following well problem cannot be performed using slickline operation?

• installation of gas lift valve

• shifting slide door sleeves

• sand bailing and debris

• cementing

Answer explanation

Cementing requires pumping of fluids into the well. Slickline does not allow pumping fluids. This can only be done using direct pumping unit, coiled tubing unit and hydraulic workover unit

Which of the following operation has to be carried out using hydraulic workover?

• wellbore cleanout

• fishing

• setting plug

• replacement of production tubing

Answer explanation

Slickline unit and coiled tubing unit only able to conduct light well intervention. Heavy well  intervention such as pulling out of production tubing and casing have to be carried out using hydraulic workover. 

The following diagram represents the reservoir performance. A production gap exists as reservoir do not effectively deliver hydrocarbon into a wellbore. Which of the following does not help to improve the situation?

• perforation

• acidising and fracturing

• isolate the high water cut formation zone

• remove scale in the production tubing

Answer explanation

The result of reservoir performance is low flow rates at high-drawdown pressures. The problem may be overcome by focusing solution at the reservoir and IPR curve.

The graph focuses on flow-conduit performance. Which of the following can help to improve the flow-conduit performance?

• coiled tubing completion

• remove restrictions in the production tubing

• clean out the debris in the tubing

• all of the mentioned

Answer explanation

If tubulars are improperly sized and if there are unnecessary mechanical restrictions such as scale buildups inside the tubing and casing.

Which of the following is the primary well barrier of slickline operation?

• BOP

• stuffing box

• downhole safety valve

• drilling mud

Answer explanation

Primary well barrier - stuffing box (slickline operation can perform in live well. Stuffing box is activated to seal the well pressure.

Secondary well barrier - BOP. Only activated when primary well barrier fails or powerpack failure or other emergency situation.

In slickline fishing operation, how do we determine which fishing tool to use?

• run with spear tool to determine the ID of the fish

• run lead impression tool (LIB) to determine the fishing neck before deciding the fishing tool

• run with overshot tool to determine the OD of the fish

• run with blind box tool to determine the fishing neck

What is the purpose of tubing swab mandrel tool in slickline operation?

• latch fishing necks

• remove scale from tubing wall

• drive an object downhole

• remove fluid sample from the wellbore

Identify the slickline toolstring components from top to bottom as per diagram

• rope socket, weigh bar, mechanical jars, knuckle joint and working tools

• rope socket, weigh bar, mechanical jars and knuckle joint

• rope socket, mechanical jars, knuckle joint and working tools

• weigh bar, mechanical jars, knuckle joint and working tools