UDS-TEKHNO_en

Well Dewaxing Unit



FOR AUTOMATIC CLEANING OF
TUBING INTERNAL WALLS USING SCRAPERS
ONLINE MONITORING

“UDS-TEKHNO” dewaxing unit is designed for fully automated mechanical cleaning of tubing internal surface using a scraper from asphaltene, resin, and paraffin deposited in ESP operated and flowing wells.

UDS prevents formation of asphaltene, resin, and paraffin plugs, restores and maintains a stable well fluid rate.

GO TO TEHSMART-UDS.RU

CLEANING MODES

The unit has an automatic, semiautomatic and manual cleaning modes:

  • in automatic mode the whole cleaning process is managed by a control unit
  • in semiautomatic mode an operator manages running in, stopping, and pulling scraper out of the well using a control unit
  • in manual mode an operator pulls out and runs a scraper in the well using a manually driven handle

FEATURES

  • UDS can be monitored using an online service that includes:
    • Real time performance parameters control
    • Remote control over a cleaning process
    • View of unit performance archive
  • Can be connected to a Client’s remote control system through protocol ModBus RTU, port Rs485
  • Wellhead catcher protects a scraper from cutting a slickline wire in the lubricator
  • Synchronizing UDS with ESP

SUL-01 CONTROL UNITFOR CONTROLLING OPERATION OF DEWAXING UNIT

SUL-01 control unit ensures operation of UDS - Tekhno dewaxing unit in an automatic mode with parameters set by operator using the control unit

In a semiautomatic mode the control unit enables running in, stopping, and pulling scraper out of the well

The unit has a modem for transmitting data to an online monitoring server and controlling UDS operation via GSM mobile network

SUL-01 CONTROL UNIT

OPERATION PRINCIPLES

  1. When starting for the first time in an automatic mode scraper is pulled to surface and is sensed with scraper upper position sensor “DVPS” when entering a wellhead lubricator
  2. When the scraper reaches a wellhead the unit starts a cleaning cycle: it runs the scraper in to the desired depth, and, then, pulls it to surface cleaning the targeted interval. Whilst running in/pulling out a mill (a blade) of the scraper cuts asphaltene, resin, and paraffin deposits from internal walls of the tubing
  3. Whilst cleaning, wire tension sensors:
    • Prevent slacking off/unwinding of slickline
    • Protect a slickline from breaking while pulling to surface
  4. After cleaning scraper is lowered to a parking point, or remains in the heated lubricator
  5. Next cleaning phases are started automatically as per Client’s schedule captured in the unit settings
SUL-01 CONTROL UNIT

CLEANING PARAMETERS

  • Cleaning interval (measured depth)
  • Scraper movement speed
  • Drive overload protection to avoid overload and emergency situations
  • Depth of scraper parking whilst waiting on the next cleaning job
  • Cleaning duration: how frequently cleaning mode is activated – a range from every 6 hours to once per week
  • Unit performance when passing complicated intervals: number of independent attempts to get through an obstacle and a pause between the attempts needed for a scraper to displace paraffin with its own weight
  • Additional functions can be added if needed
SUL-01 CONTROL UNIT


ONLINE SERVICE FOR MONITORING UDS-TEKHNO IN REAL TIME

Monitoring system enables receiving data on UDS performance parameters in real time via Internet using a Client’s smartphone/ computer

UNIT SCREEN

SUL-01 CONTROL UNIT
The unit has a coloured screen displaying the following parameters:
  • Current tripping parameters: scraper depth, speed, drive load
  • Scale indicating depth and load current values as well as indicated maximum thresholds
  • Active operation mode: cleaning, pause, blocking
  • Date and time of the next cleaning job
  • GSM network signal strength
  • Current date and time

OPERATION SCHEDULE

SUL-01 CONTROL UNIT

OPERATION SCHEDULE

UDS operation reports are generated in XLS / TXT / CSV file formats
Data archives can be downloaded:
  • using your personal account on the web site
  • on well site using USB flash drive
  • using a laptop

TECHNICAL SPECIFICATIONS

Slickline type on a drum ГОСТ 7372-79, Ø 1.8 – 2.2 мм
Cleaning interval up to 1 600 m
Scraper movement speed 100 … 700 m/h
Electric drive design ExProof
Cleaning modes Manual
Semiautomatic
Automatic
Ambient temperature -40 … +80°С
Power supply parameters 380 V, 50 Hz
Job/operation type Automatic cleaning
Blind trip Retrieval of scraper from unknown depth point
On hold Unit is waiting on the next cleaning job or ESP start-up
Manual mode Operator controls unit operation using its control box
No-go events Complicated intervals
Error No-go zones, jammed wire, blocked electric drive