Main components of coiled tubing equipment.
1. Drum: stores and transmits coiled tubing;
2. Injection head: provides power for lifting and lowering coiled tubing;
3. Operation room: Equipment operators monitor and control coiled tubing here;
4.Power group: the hydraulic power source required to operate coiled tubing equipment;
5. Well control device: a wellhead safety device when coiled tubing is operated under pressure.
Well control device
Well control equipment is another critical part of coiled tubing operations. A typical coiled tubing well control device includes a blowout preventer (BOP) and a blowout box connected to the upper part of the BOP (high-pressure continuous tubing operations usually have two blowout boxes and a spare BOP). All these devices must consider their pressure rating and suitable temperature range when operating on site.
The blowout prevention box is equipped with a sealing element, which is used to isolate the pressure system in the wellbore. It is usually installed between the BOP and the injection head. The blowout prevention box is divided into two types: dynamic seal and static seal. The blowout preventer device is designed as a side door to facilitate the replacement of sealing elements of the coiled tubing while it is in the well.
The BOP is connected to the lower end of the blowout preventer box and can also be used to control wellbore pressure. According to the requirements of coiled tubing operations, the BOP is usually specially designed, including several pairs of rams, each with its own special function. The four-gate system is the most common BOP in operation.
Coiled tubing operation characteristics
1. Snubbing operation.
2. Do not move the tubing string in the well to protect the production tubing.
3. Able to complete some operations that cannot be done by conventional methods.
4. Instead of some routine operations, the efficiency and quality of operations are higher.
5. Cost-saving, simple and time-saving, safe and reliable, and widely used.
Post time: Sep-06-2023
Room 703 Building B, Greenland center, Hi-tech development zone Xi’an, China
86-13609153141
