Dewaxing scrapers
Intended use:
The scrapers produced by Debit-E are designed for mechanical cleaning of internal tubing surfaces from asphaltene, resin and paraffin deposits. Scrapers are used as part of Automatic Well Dewaxing Mechanisms (MDSA) “Suleimanov Winch” of the following models: MDS-010, MDS-10, DSA-18, MDSA-20, and MDSA-3000 (4000).
Debit-E scrapers are also suitable for use with the following types of well dewaxing units: UDS, UDS-Tekhno, UDS-3000T, UDS-1M, UOK-NKT, PADUS, PADU-3M, and other.
General layout of scrapers produced by Debit-E LLC
Basic specifications
| Scraper length | from 1,200 mm |
| Dead weight | 10–42 kg (bar is filled with lead) |
| Operating temperature | -40º … +150°С |
| Maximum pressure | 35 MPa |
| Number of cutting heads (milling cutters) | 1–8 pcs. |
| Diameter of cutting heads (milling cutters) | 32 … 90 mm |
| Diameter of scraper bar | 28 … 45 mm |
| Lower working part of the scraper | cutting head (more than 20 options) plug (when working with the upper cutting head only) |
| Upper working part of the scraper | cutting head (more than 20 options) |
| To use with DVPS-03 | Can be equipped with a magnet |
| To use a collect catcher | Can be equipped with an all-purpose mushroom head (rope socket) |
| Swivel | open (SO) or closed (SC) |
| Joining device | reliable and convenient mounting |
Within 30 years of Suleimanov Winch operation, Debit-E specialists have upgraded previously known and developed new efficient types of scrapers
SP series — spear-type scrapers
SLO series — axial blade scrapers (formerly known as PU)
SLK series — contouring blade scrapers (formerly known as PUR)
SLR series — expandable blade scrapers (formerly known as LE)
STM series — metal turbine-type scrapers (formerly known as TU)
STP series — polyamide turbine-type scrapers (formerly known as TU)
STK series — combined turbine-type scrapers
SKU series — KOMI reinforced scrapers (formerly known as STR)
Spear-type scraper (SP)
Well spear-type scrapers SP are used for initial punching through asphaltene, resin and paraffin plugs and preparing the tubing for subsequent regular cleaning jobs with scrapers of other series as part of Automatic Well Dewaxing Mechanisms (MDSA) of the following types: MDS-010, MDS-10, MDSA-20.7, MDSA-20.5, MDSA-18, MDSA-3000, and MDSA-4000.
A spear-type scraper can be used as a troubleshooting tool. Cutting edge rotation and positioning at different heights reduce cutting resistance and contribute to most effective penetration of paraffin plug.
Maximum cleaning efficiency is achieved by observing well cleaning intervals, which is provided through the use of Automatic Well Dewaxing Mechanisms (MDSA) of the following types: MDS-010, MDS-10, MDSA-20.7, MDSA-20.5, MDSA-18, MDSA-3000, and MDSA-4000.
Spear-type scrapers manufactured by Debit-E LLC feature the cutting head of a right geometry, high-quality materials and proper blade sharpening.
Axial blade scrapers (SLO)
Axial blade scrapers of constant diameter are part of the Automatic Well Dewaxing Mechanisms (MDSA) MDS-010, MDS-10, MDSA-20.7, MDSA-20.5, MDSA-18, MDSA-3000 and MDSA-4000. They are designed for dewaxing (tubing cleaning) wells with low and medium flow rate from asphaltene, resin and paraffin deposits (ARPD).
Scrapers of SLO and SLK series are one of the most effective tools for preventing asphaltene, resin and paraffin deposits. 95% of our Customers choose scrapers of these series for winch operation in automatic mode.
Debit-E engineers were the first to calculate and prove that angled head blades can easily cut wax layers from inner walls of tubing string, ensuring the declared drift diameter. The typical scraper is fitted with two cutting heads, the diameter of the upper cutting head usually being larger than the diameter of the lower head.
Maximum cleaning efficiency is achieved by observing well cleaning intervals, which is provided through the use of Automatic Well Dewaxing Mechanisms (MDSA) of the following types: MDS-010, MDS-10, MDSA-20.7, MDSA-20.5, MDSA-18, MDSA-3000, and MDSA-4000.
The advantages of scrapers produced by Debit-E LLC are calculated geometry (width and
angle) of the cutting head blades, proper materials and correct blades
retipping.
Contouring blade scraper (SLK)
Axial blade scrapers of constant diameter are part of the Automatic Well Dewaxing Mechanisms (MDSA) MDS-010, MDS-10, MDSA-20.7, MDSA-20.5, MDSA-18, MDSA-3000 and MDSA-4000. They are designed for dewaxing (tubing cleaning) wells with low and medium flow rate from asphaltene, resin and paraffin deposits (ARPD).
Scrapers of SLO and SLK series are one of the most effective tools for preventing asphaltene, resin and paraffin deposits. 95% of our Customers choose scrapers of these series for winch operation in automatic mode.
Debit-E engineers were the first to calculate and prove that angled head blades can easily cut wax layers from inner walls of tubing string, ensuring the declared drift diameter. The typical scraper is fitted with two cutting heads, the diameter of the upper cutting head usually being larger than the diameter of the lower head.
Maximum cleaning efficiency is achieved by observing well cleaning intervals, which is provided through the use of Automatic Well Dewaxing Mechanisms (MDSA) of the following types: MDS-010, MDS-10, MDSA-20.7, MDSA-20.5, MDSA-18, MDSA-3000, and MDSA-4000.
The advantages of scrapers produced by Debit-E LLC is the use of innovative polymeric material whose properties 4 times surpass those of competitor Rimamid.
Expandable blade scraper (SLR)
Variable diameter scrapers with movable blade are used for dewaxing (cleaning of tubing string) from asphaltene, resin and paraffin deposits at low- and medium-rate wells as part of Automatic Well Dewaxing Mechanisms (MDSA) of the following types: MDS-010, MDS-10, MDSA-20.7, MDSA-20.5, MDSA-18, MDSA-3000, and MDSA-4000.
Variable diameter scrapers have proven to be highly effective when removing asphaltene, resin and paraffin deposits from inner walls of tubing string, providing the declared drift diameter at high treatment speed. The scraper is fitted with one movable cutting head, which enables smooth lowering of the scraper to maximum cleaning depth. The tubing string is cleaned to the declared diameter only when the scraper is lifted.
Maximum cleaning efficiency is achieved by observing well cleaning intervals, which is provided through the use of Automatic Well Dewaxing Mechanisms (MDSA) of the following types: MDS-010, MDS-10, MDSA-20.7, MDSA-20.5, MDSA-18, MDSA-3000, and MDSA-4000.
The advantages of scrapers produced by Debit-E LLC are calculated geometry (width and angle) of the cutting head blades, proper materials and correct blades retipping.
Metal turbine-type scraper (STM)
Turbine-type scrapers (milling-type) by Debit-E LLC are used for dewaxing (cleaning of tubing string) from asphaltene, resin and paraffin deposits in high-rate wells or high treatment speed wells. Rotary motion of the cutting head created at high speeds enables effective cutting a wax layer from internal surface of pipes.
Milling cutters are manufactured in two types: steel and plastic made of high-strength polyamide. With the required well flow rate or treatment speed, the product design allows for the cutter to rotate along its axis at a high speed. The highest cleaning efficiency is achieved when using twin milling cutters with different rotation directions (cutters are connected with a special sleeve).
Maximum cleaning efficiency is achieved by observing well cleaning intervals, which is provided through the use of Automatic Well Dewaxing Mechanisms (MDSA) of the following types: MDS-010, MDS-10, MDSA-20.7, MDSA-20.5, MDSA-18, MDSA-3000, and MDSA-4000.
The advantages of scrapers produced by Debit-E LLC are calculated geometry of the turbine blades and proper materials.
Polyamide turbine-type scraper (STP)
To perform jobs in tubing with polymer coating, the scrapers are fitted with high-strength plastic turbine heads (milling cutters) to prevent the scraper from damaging the internal surface of tubing string.
Turbine-type scrapers (milling-type) by Debit-E LLC are used for dewaxing (cleaning of tubing string) from asphaltene, resin and paraffin deposits in high-rate wells or high treatment speed wells. Rotary motion of the cutting head created at high speeds enables effective cutting a wax layer from internal surface of pipes.
Milling cutters are made of high-strength polyamide. With the required well flow rate or treatment speed, the product design allows for the cutter to rotate along its axis at a high speed. The highest cleaning efficiency is achieved when using twin milling cutters with different rotation directions (cutters are connected with a special sleeve).
Combined turbine-type scraper (STK)
To perform jobs in tubing with polymer coating, Debit-E LLC manufactures STK scraper which combines the advantages of a scraper with turbine-type heads (milling cutters) and constant diameter heads.
KOMI reinforced scraper (KRS)
Scrapers of SKU and SKL series are designed for cleaning of tubing strings where dry asphaltene, resin and paraffin deposits are accumulated, which require high effort and maximum washout to remove cut deposits. These scrapers are used as part of the Automatic Well Dewaxing Mechanism (MDSA) of the following types: MDS-010, MDS-10, MDSA-20.7, MDSA-20.5, MDSA-18, MDSA-3000, and MDSA-4000.
Collaborative work of engineers from Debit-E LLC and specialists from Lukoil-KOMI, as well as analysis of prior experience of handling known models of scrapers resulted in creation of SKU and SKL series.
These scrapers have only one top cutting head, thus contributing to stable operation in the tubing dewaxing process.
Maximum cleaning efficiency is achieved by observing well cleaning intervals, which is provided through the use of Automatic Well Dewaxing Mechanisms (MDSA) of the following types: MDS-010, MDS-10, MDSA-20.7, MDSA-20.5, MDSA-18, MDSA-3000, and MDSA-4000.
The advantages of scrapers produced by Debit-E LLC are their unique design suitable for use specifically with dry asphaltene, resin and paraffin deposits.
KOMI leaf scraper (SKL)
Scrapers of SKU and SKL series are designed for cleaning of tubing strings where dry asphaltene, resin and paraffin deposits are accumulated, which require high effort and maximum washout to remove cut deposits. These scrapers are used as part of the Automatic Well Dewaxing Mechanism (MDSA) of the following types: MDS-010, MDS-10, MDSA-20.7, MDSA-20.5, MDSA-18, MDSA-3000, and MDSA-4000.
Collaborative work of engineers from Debit-E LLC and specialists from Lukoil-KOMI, as well as analysis of prior experience of handling known models of scrapers resulted in creation of SKU and SKL series.
These scrapers have only one top cutting head, thus contributing to stable operation in the tubing dewaxing process.
Maximum cleaning efficiency is achieved by observing well cleaning intervals, which is provided through the use of Automatic Well Dewaxing Mechanisms (MDSA) of the following types: MDS-010, MDS-10, MDSA-20.7, MDSA-20.5, MDSA-18, MDSA-3000, and MDSA-4000.
The advantages of scrapers produced by Debit-E LLC are their unique design suitable for use specifically with dry asphaltene, resin and paraffin deposits.
Slanted well scraper (SNS)
It is used to clean wellbores with zenith deviation of up to 45%. Proprietary design of Debit-E LLC.
Our scraper analogues with varying degrees of success are known as:
SF milling scrapers, SD dynamic scraper, expandable scraper, Bolotov’s scraper, DI.55, KI.55, PA.55, KR.55, PL.55, SR-73, SL-73, Stroev’s scraper.