Product Overview
The Thru Tubing Cutter is a slim compact hydraulic expandable blade downhole cutting tool developed for coiled tubing heavy workover pipe severance operations. Its slim outer diameter enables the tool to smoothly pass through small-diameter wellbore restrictions including casing nipples, reduced diameter bottleneck sections and inner tubing bores, to perform cutting work on larger inner-diameter production tubing or casing below the restriction positions.
In standard construction matching configuration, this cutter is run in tandem with a screw-type hydraulic motor and hydraulic setting anchor tool as a complete workover string assembly. During downhole cutting operations, surface pump circulates high-pressure fluid through the tool string; sufficient fluid flow passes through the internal piston chamber of the cutter, hydraulic pressure pushes the piston upward to drive multiple cutting blades to extend radially outward, the sharp blade edges fully contact the inner wall of target tubing/casing. The screw motor provides stable rotary torque to drive the entire cutter to rotate circumferentially, realizing uniform full-circle severance of the tubular string. After completing cutting work, simply shut down the surface circulation pump to release hydraulic actuating pressure; internal return spring assembly pulls the piston back down, and all cutting blades fully retract back into the tool body, allowing the complete tool string to be tripped out of the well smoothly without blade jamming.
The cutter adopts an integrated self-centralizing structural design, which automatically centers the tool inside tubing/casing during rotary cutting, ensuring even stress distribution on all cutting blades and eliminating local overloading or incomplete circumferential cutting defects. Multiple interchangeable high-performance cutting blade specifications are available, with dedicated blade material and cutting edge geometry matched for different steel grade tubing and casing, including common carbon steel, alloy steel and high-strength anti-corrosion tubular products, delivering efficient, smooth cutting performance without blade chipping or rapid wear.
Two complete service grades are supplied to adapt diverse reservoir environments: STD standard grade for conventional sweet oil wells without hydrogen sulfide corrosive media; H₂S sour service grade manufactured with sulfur-resistant alloy to adapt high-H₂S corrosive sour gas well downhole working conditions.
The standardized product lineup covers outer diameter sizes ranging from 1-3/4" to 3-1/2", with matched maximum cutting anchor extension range and overall make-up length specifications, equipped with standard 1" AMMT, 1-1/2" AMMT, 2-3/8" PAC and NC26 bottom connection threads for universal compatibility with mainstream coiled tubing connectors, screw hydraulic motors and hydraulic setting anchor downhole service tools. Custom outer diameter, cutting blade steel grade matching and anti-sulfur passivation coatings are available upon customer technical drawing submission; customers are required to clearly specify the target tubing/casing steel grade when placing orders to ensure correct blade configuration delivery.
Complete Technical Specification Table
| PN Part Number | Outer Diameter OD | Maximum Anchor Extension Range | Make-Up Length | Working Condition Grade | Bottom Connection Thread |
|---|---|---|---|---|---|
| L5021750120 | 1-3/4" | 2-7/8" ~ 3-1/2" | 30.2" | STD Standard | 1" AMMT |
| L5022125120 | 2-1/8" | 3-1/2" ~ 4-1/2" | 30.7" | STD Standard | 1-1/2" AMMT |
| L5022875120 | 2-7/8" | 4-1/2" ~ 5-1/2" | 35.2" | STD Standard | 2-3/8" PAC |
| L5023125120 | 3-1/8" | 4-1/2" ~ 5-1/2" | 36" | STD Standard | 2-3/8" PAC |
| L5023500120 | 3-1/2" | 5" ~ 5-1/2" | 39" | STD Standard | NC26 |
| L5021750320 | 1-3/4" | 2-7/8" ~ 3-1/2" | 30.2" | H₂S Sour Service | 1" AMMT |
| L5022125320 | 2-1/8" | 3-1/2" ~ 4-1/2" | 30.7" | H₂S Sour Service | 1-1/2" AMMT |
| L5022875320 | 2-7/8" | 4-1/2" ~ 5-1/2" | 35.2" | H₂S Sour Service | 2-3/8" PAC |
| L5023125320 | 3-1/8" | 4-1/2" ~ 5-1/2" | 36" | H₂S Sour Service | 2-3/8" PAC |
| L5023500320 | 3-1/2" | 5" ~ 5-1/2" | 39" | H₂S Sour Service | NC26 |
Note: Custom outer diameter, cutting blade steel grade matching specifications, anti-sulfur passivation coatings and non-standard length thru tubing cutters are available via engineering consultation. Customers must clearly specify the target tubing/casing steel grade when placing purchase orders to guarantee correct matching cutting blade delivery.
Core Features & Advantages
Slim Compact Outer Diameter Through-Restriction Design: Optimized slim tool body OD allows the cutter to freely pass through small wellbore bottleneck structures such as casing nipples, reduced diameter restriction sections and inner tubing bores, realizing cutting operations on larger ID tubulars located below restriction positions that conventional large-OD cutters cannot access.
Hydraulic Piston Actuated Expandable & Retractable Cutting Blade Mechanism: Operation logic is reliable and easy to control: activate surface pump circulation, hydraulic pressure pushes internal piston upward to extend cutting blades radially outward to engage tubular inner wall for severance; cease pump flow after construction work, built-in return spring automatically resets the piston and fully retracts all blades into the tool body, avoiding blade drag or jamming during tripping out of the well.
Integrated Self-Centralizing Structural Configuration: Built-in centralizing ribs and floating centering assembly keep the cutter perfectly coaxial with target tubing/casing during rotary cutting, distributing cutting load evenly across all blade cutting edges, preventing unilateral blade overload, local incomplete cutting and premature blade damage, guaranteeing smooth full 360° circumferential pipe severance.
Grade-Specific Interchangeable High-Performance Cutting Blades: Multiple independent blade options are developed for different steel grade production tubing and casing; each blade set adopts tailored high-hardness high-toughness alloy material and optimized cutting edge profile matched to corresponding tubular steel strength, realizing fast, clean pipe cutting without blade edge chipping, blunting or excessive abrasion.
Complete Matched Workover String Compatibility: Perfectly matched to form an integrated cutting workover assembly when combined with screw-type hydraulic motor and hydraulic setting anchor tool, the three tools cooperate to realize stable anchoring positioning, torque power output and tubular cutting functions in one single run-in trip, improving overall heavy workover construction efficiency.
Dual Working Condition Grade Configuration: STD standard version applies to conventional sweet oilfield non-corrosive working environments; H₂S sour service version adopts sulfur-resistant alloy base material and professional anti-sulfur passivation coating to resist hydrogen sulfide corrosion in harsh sour gas well pipe cutting heavy workover conditions.
Full Outer Diameter Size Compatibility: Standard product series covers 1-3/4", 2-1/8", 2-7/8", 3-1/8" and 3-1/2" outer diameter specifications, fully compatible with global mainstream medium-size coiled tubing assemblies for all through-restriction tubing and casing severance intervention demands.
Multi-Type Standard Thread Compatibility: All product models are equipped with universal 1" AMMT, 1-1/2" AMMT, 2-3/8" PAC and NC26 bottom connection threads, realizing seamless assembly with global mainstream coiled tubing bottom-hole assemblies, screw hydraulic motors and hydraulic anchors without extra conversion subs.
Precision CNC High-Strength Alloy Manufacturing: Adopts precision CNC machining integral tool body, hydraulic piston assembly, centralizing centering structure and interchangeable cutting blade components, featuring outstanding high-pressure fluid erosion resistance, cutting impact load resistance and structural durability, extending long-term continuous downhole tubular severance service life.
Application Scenarios
1. Coiled tubing through small wellbore restriction heavy-load downhole intervention tubular severance treatments, including production tubing cutting, damaged casing section severance, stuck pipe string release and abandoned well tubular plug-off cutting rotary construction operations
2. Conventional sweet crude oilfield slim through-restriction pipe cutting heavy workover service, matched with screw hydraulic motor and hydraulic anchor for complete one-trip cutting construction (STD standard service grade)
3. High-H₂S sour gas well corrosive environment coiled tubing thru-tubing hydraulic blade cutter downhole tubular severance construction operations (H₂S sour service grade)
4. Downhole pipe cutting heavy workover projects requiring tool passage through casing nipples, reduced diameter restriction sections and inner tubing bores to cut larger ID tubulars located below wellbore bottleneck structures
5. Long-term continuous rotary tubular cutting impact load safety protection for coiled tubing bottom-hole assemblies in onshore and offshore oilfield through-restriction pipe severance heavy workover intervention projects
Standard Delivery Package
Complete thru tubing cutter integral pre-assembled unit including hydraulic piston actuating assembly, built-in self-centralizing floating centering structure, interchangeable cutting blade mounting base and standard bottom connection thread
Spare interchangeable cutting blade kit with multiple steel-grade matched blade specifications, customers shall specify target tubular steel grade for correct blade selection
Full factory inspection test report including hydraulic blade extension/retraction cycle durability test, integral tensile load test, self-centralizing coaxial accuracy calibration test and tubular cutting impact load resistance performance test data
Product dimension drawing and official installation & operation instruction manual, with clear reminder for steel grade specification marking during order placement
Quality Warranty & After-Sales Service
Warranty Coverage: 12 months after factory shipment or 2000 cumulative working hours, whichever condition is reached first
Full factory inspection: Each finished thru tubing cutter passes integral tensile load test, hydraulic blade expand/retract cycle test, self-centralizing coaxial accuracy calibration test and tubular cutting impact load resistance test before factory delivery
Free professional technical support: Our oilfield downhole tool engineering team provides coiled tubing pipe cutting heavy workover tool string matching, outer diameter & cutting blade steel grade selection and working condition grade consultation free of charge; we will confirm tubular steel grade requirements with customers before order production
Long-term spare parts supply: All interchangeable cutting blade wear accessories are stocked with competitive factory bulk pricing, with dedicated blade options for all common tubing/casing steel grades
Custom development service: Support custom outer diameters, cutting blade steel grade matching specifications, bottom thread profiles, anti-corrosion coatings and special size thru tubing cutters based on customer technical drawings
FAQ
Q1: What is the core function of a Thru Tubing Cutter?
The Thru Tubing Cutter is a slim OD hydraulic expandable blade coiled tubing cutting sub, designed to pass through small wellbore restrictions (nipples, reduced diameter sections) to cut larger ID tubing/casing below restrictions. It is run with a screw motor and hydraulic anchor as a complete workover string. Circulating fluid drives the internal piston upward to extend cutting blades outward for full-circumference pipe severance; stop pump flow after cutting, built-in spring retracts all blades fully back into the tool body for smooth tripping out. It features self-centralizing structure and grade-specific high-performance cutting blades for different steel tubular products.
Q2: What three core structural advantages does this thru tubing cutter own?
1. Slim compact outer diameter through-restriction design, the small tool body OD enables the cutter to pass through casing nipples, reduced diameter bottlenecks and inner tubing bores, realizing cutting operations on larger inner-diameter tubulars that conventional large-OD cutters cannot access; 2. Hydraulic piston actuated expandable and retractable cutting blade control mechanism, operation is simple and reliable: start pump circulation to extend blades for cutting, shut down pump flow to fully retract blades via internal reset spring, eliminating blade drag or jamming risks during tripping out of the well; 3. Integrated self-centralizing structural design paired with interchangeable grade-specific high-performance cutting blades, the centralizing assembly keeps the tool coaxial with target tubular during rotary cutting to evenly distribute cutting load and avoid unilateral blade overload; multiple tailored blade sets are available for different steel grade tubing and casing to deliver stable, clean cutting without premature blade damage or chipping.
Q3: What outer diameter sizes do these thru tubing cutters support?
Our standard production lineup fully covers outer diameters: 1-3/4", 2-1/8", 2-7/8", 3-1/8" and 3-1/2". All models adopt universal 1" AMMT, 1-1/2" AMMT, 2-3/8" PAC and NC26 bottom connection threads compatible with global mainstream coiled tubing connector assemblies, screw hydraulic motors and hydraulic setting anchors.
Q4: What is the difference between STD standard grade and H₂S sour service grade?
STD standard grade is manufactured for conventional sweet oil wells without hydrogen sulfide corrosive fluid. H₂S sour service grade adopts sulfur-resistant alloy substrate and special anti-sulfur passivation coating to resist chemical corrosion in high-H₂S sour gas well environments.
Q5: What is the standard production lead time for bulk purchase orders?
All standard PN part numbers are kept in factory inventory, goods can be delivered within 7–15 working days, subject to confirmation of customer-specified tubing/casing steel grade for cutting blade matching. Customized thru tubing cutters with special outer diameters or custom cutting blade steel grade matching specifications require 20–35 working days production cycle, subject to total order quantity and steel grade customization demands.
Get Custom Datasheet & Factory Quote
We are a professional OEM & ODM manufacturer focused on full series coiled tubing heavy workover and washing downhole service tools, covering thru tubing cutters, high expansion four-blade hydraulic anchors, annular grapple hydraulic anchors, heavy duty motorhead assemblies, concentric coiled tubing wash tools (multi-mode), concentric coiled tubing wash tools (single mode), slimline wash tools (double dart), slimline wash tools (double flapper), storm wash tools, low speed spinning jetting tools, multiple points rotary wash tools, fast rotary wash tools, conical wash tools, multi-nozzle wash tools, bull nose wash tools, big ID large bore motorhead assemblies, heavy duty integrated motorhead assemblies, big ID hydraulic disconnects, dog latch interchangeable piston hydraulic disconnects, heavy duty high torsion hydraulic retrievable disconnects, mechanical hydraulic dual-action disconnects, mechanical adjustable shear tension disconnects, dual activated dual-action circulation valves, ball activated shear pin circulation valves, burst disc pressure circulation valves, double dart dual-stage sealing check valves, double flapper dual-stage sealing check valves, big ID single flapper check valves, grapple dimple composite connectors, grub screw heavy-duty connectors, double dimple-on connectors, single dimple-on connectors, double roll-on connectors, single roll-on connectors, internal grapple connectors, external grapple connectors, logging heads and tubing hangers. Every finished product undergoes strict factory tensile load, hydraulic blade expand/retract cycle, self-centralizing coaxial accuracy and tubular cutting impact load resistance calibration testing, with complete material inspection certification attached to each shipment. Please share your detailed technical requirements, including target outer diameter size, target tubing/casing steel grade for cutting blade matching, working environment (STD standard or H₂S sour service) and all customized specification demands. Our dedicated oilfield downhole tool engineering team will send complete detailed technical datasheets and competitive factory wholesale quotations within 24 business hours, and we will verify tubular steel grade requirements with you to ensure correct cutting blade configuration for your project.
