The Hydraulic Tubing End Locator is a professional flow-activated downhole positioning tool specially developed for oilfield completion, workover and stimulation operations. Its core function is to calibrate the accurate depth position of tubing string bottom ends inside wellbores. The front locating blocks of the tool can repeatedly expand and retract under continuous hydraulic flow force inside tubing, which enables multiple rounds of tubing end positioning calibration within only one single tubing running trip. Construction crews do not need to pull the entire tubing string out of the wellbore for repeated depth marking, greatly cutting well tripping times and lowering overall field operation time and cost.
This product series provides two independent working condition material grades: STD standard carbon steel for conventional low-corrosion oil and gas wells, and H₂S sour resistant alloy for harsh high hydrogen sulfide corrosive sour gas well environments. The full specification lineup covers three mainstream production tubing outer diameter ranges including 2-3/8"~2-7/8", 2-7/8"~3-1/2" and 3-1/2"~4-1/2". Each size model is pre-processed with industry standard 1" AMMT or 1-1/2" AMMT premium tubing connection threads, supporting direct assembly with standard completion tubing strings without extra transition subs. Custom non-standard outer diameters, assembly lengths, special connection threads and customized high-corrosion resistant alloy materials are available upon engineering technical consultation.
The full product line includes six independent PN model numbers, divided into STD standard carbon steel grade and H₂S sour resistant alloy grade, all parameters listed as below:
PN L4061690120 (STD Grade): Tool OD 1-11/16", applicable tubing size range 2-3/8"~2-7/8", make-up length 22.6", connection thread 1" AMMT, working condition STD standard carbon steel
PN L4062125120 (STD Grade): Tool OD 2-1/8", applicable tubing size range 2-7/8"~3-1/2", make-up length 24.6", connection thread 1-1/2" AMMT, working condition STD standard carbon steel
PN L4062500120 (STD Grade): Tool OD 2-1/2", applicable tubing size range 3-1/2"~4-1/2", make-up length 25.6", connection thread 1-1/2" AMMT, working condition STD standard carbon steel
PN L4061690320 (H₂S Grade): Tool OD 1-11/16", applicable tubing size range 2-3/8"~2-7/8", make-up length 22.6", connection thread 1" AMMT, working condition H₂S sour resistant alloy
PN L4062125320 (H₂S Grade): Tool OD 2-1/8", applicable tubing size range 2-7/8"~3-1/2", make-up length 24.6", connection thread 1-1/2" AMMT, working condition H₂S sour resistant alloy
PN L4062500320 (H₂S Grade): Tool OD 2-1/2", applicable tubing size range 3-1/2"~4-1/2", make-up length 25.6", connection thread 1-1/2" AMMT, working condition H₂S sour resistant alloy
Customized non-standard tool outer diameters, modified make-up assembly lengths, special customized connection thread specifications and enhanced anti-corrosion alloy material versions can be developed and manufactured strictly according to clients’ technical drawing documents and field well downhole working condition parameters. The locator can be assembled directly above packers, landing nipples and stimulation downhole tools to realize integrated tubing string depth calibration during completion running operations.
Hydraulic Resettable Expandable Locating Blocks:The front positioning blocks adopt hydraulic flow drive expansion and retraction design. When fluid circulates inside the tubing string, hydraulic pressure pushes the locating blocks outward to contact the casing inner wall and generate positioning signal; after finishing one round of depth calibration, adjusting surface pump flow rate can retract blocks automatically. This resettable structure allows dozens of repeated positioning operations in one tubing running trip, eliminating the need to pull tubing out for repositioning and drastically improving construction efficiency.
Remarkable Obvious Surface Weight Variation Signal:When hydraulic force pushes locating blocks open and contacts casing inner wall, obvious mechanical resistance will be transmitted to surface weight indicator through tubing string. Field engineers can clearly observe distinct weight jump signals on surface gauge once positioning blocks contact casing wall. The prominent weight fluctuation eliminates ambiguous signal judgment errors, enabling construction crews to record accurate tubing end depth benchmark data rapidly and reliably.
Dual Working Grade Material Matching Scheme:The full product series provides two complete material grades to adapt different downhole fluid environments: STD standard carbon steel with cost advantages for conventional onshore oil wells with low hydrogen sulfide and moderate temperature-pressure conditions; H₂S sour resistant alloy model fully compliant with sour service standards, resisting sulfide stress cracking and corrosion under high H₂S, high chloride sour gas well downhole conditions. Clients can select corresponding grade models according to their well fluid composition parameters.
Full Coverage of Mainstream Production Tubing Sizes:Six standard PN models cover three widely applied production tubing diameter ranges in global oilfield completion projects: 2-3/8" to 2-7/8", 2-7/8" to 3-1/2", and 3-1/2" to 4-1/2". Every tubing range matches exclusive tool outer diameter, fixed make-up length and corresponding AMMT connection thread specification, perfectly fitting different tubing inner and outer dimension standards.
Standard AMMT Premium Tubing Connection Threads:All standard locator models are pre-machined with two industry recognized AMMT premium tubing connection threads: 1" AMMT for small diameter tubing ranges, and 1-1/2" AMMT for medium and large tubing size ranges. All thread machining complies with unified international oilfield precision forging standards, realizing seamless matching with mainstream completion tubing, packer assembly and stimulation tool strings worldwide without additional transition adapters.
Operation Cost Reduction & Low Maintenance Structure:The resettable hydraulic positioning design avoids repeated tubing pulling and tripping operations, significantly saving rig working time, fluid circulation cost and labor expense for oilfield service companies. The internal hydraulic drive assembly adopts integrated split structure with few vulnerable spare parts. Field maintenance can complete locating block replacement and hydraulic flow channel cleaning without special professional maintenance equipment, reducing daily maintenance labor and spare part consumption costs.
1. Completion tubing running depth calibration operations. The core application for hydraulic tubing end locator is depth positioning during production tubing running for oil & gas well completion projects. It accurately marks tubing bottom end depth benchmarks to ensure packers, landing nipples and other completion accessories are installed at target reservoir intervals with precise depth control.
2. Oilfield stimulation & well workover tubing string depth verification. Widely applied in acidizing, fracturing stimulation and routine well workover construction. When running stimulation tubing strings into target treatment zones, the resettable hydraulic locator completes multiple depth calibration operations in a single trip, ensuring stimulation tools are positioned accurately at target pay zones without repeated tubing tripping.
3. Sour gas well completion and high sulfur downhole intervention construction. The dedicated H₂S sour resistant alloy grade model adapts harsh high hydrogen sulfide corrosive downhole environments for sour gas field completion tubing running and maintenance workover operations, providing stable positioning performance under corrosive fluid conditions.
4. Conventional onshore oil well low-corrosion completion construction. All STD standard carbon steel grade models are suitable for standard land oil wells with low hydrogen sulfide, moderate temperature and pressure downhole environments, covering vertical, deviated and horizontal well tubing running depth calibration projects.
Fully pre-assembled hydraulic tubing end locator main unit with anti-rust passivation treatment on all AMMT connection thread surfaces
Spare hydraulic locating block sets, internal elastic reset springs, fluid flow channel sealing rings and plastic thread protective caps for transportation and long-term storage
Complete factory full batch inspection documents, including dimensional tolerance test report, raw material metal composition certification, hydraulic locating block expansion force test record and surface weight signal trigger calibration test report
Multi-language product installation and field operation manual, including tool disassembly maintenance steps, hydraulic pump flow rate adjustment guidance for locating block expansion/retraction, and standard tubing running positioning operation procedures for field construction engineers
Optional third-party independent material certification documents and integrated completion tubing string matching scheme files to meet overseas oilfield project bidding supporting technical document requirements
Warranty Policy: 12 full months after factory shipment or 800 cumulative hydraulic positioning & downhole tripping cycles, whichever service condition is reached first
Strict Full-Process Factory Pre-Delivery Inspection: Every finished hydraulic tubing end locator passes multiple rounds of rigorous performance testing before leaving factory, including dimensional precision detection, AMMT thread tensile load inspection, locating block hydraulic expansion reset cycle fatigue test, surface weight signal trigger stability calibration and full surface visual metal defect inspection, guaranteeing consistent stable performance across all production batches
Free Global Professional Oilfield Technical Support: Provide free production tubing size matching consultation, integrated completion tubing string assembly scheme design and hydraulic pump flow rate parameter adjustment technical guidance for domestic and overseas oilfield service clients
Long-Term Stable Global Spare Parts Supply Chain: All six standard PN model hydraulic tubing end locators are kept in factory finished goods inventory to support large volume bulk wholesale orders. Flexible global sea freight and air freight delivery schedules can be arranged according to clients’ oilfield project construction timelines to match rig operation plans.
Customized Professional Engineering Solution Service: Support research, development and production of non-standard specification hydraulic tubing end locators and high anti-corrosion alloy customized versions strictly in accordance with clients’ technical drawing documents, field well downhole working condition fluid parameters and special customized completion tubing construction operation requirements
Q1: What core advantage does the resettable hydraulic locating block design bring to field construction operations?
The hydraulic flow activated resettable locating blocks can expand and retract dozens of times within a single tubing running trip without pulling the entire tubing string out of the wellbore. Traditional mechanical tubing end locators can only complete one single positioning calibration per tubing running trip; construction crews have to pull tubing out and run back in for repeated depth marking, generating massive rig time and fluid circulation cost. The resettable hydraulic design eliminates repeated tubing tripping operations, greatly shortening overall construction time and cutting field operation expense for oilfield service companies.
Q2: How to identify accurate tubing end depth relying on the obvious surface weight change signal?
When surface pump circulates fluid inside tubing string, hydraulic pressure pushes the front locating blocks outward to contact casing inner wall. The mechanical friction resistance between locating blocks and casing wall will generate a distinct weight jump signal transmitted to surface weight indicator through tubing string. Construction engineers record the exact depth numerical value corresponding to this obvious weight fluctuation signal to complete accurate tubing end depth calibration. After recording depth data, adjusting surface pump flow rate reduces internal hydraulic pressure to retract locating blocks automatically, preparing for next round of positioning calibration in the same tubing running trip.
Q3: What differences exist between STD standard grade and H₂S sour service grade hydraulic tubing end locators?
The STD standard grade adopts conventional carbon steel raw material, which features cost advantages and stable performance under low hydrogen sulfide, moderate temperature-pressure standard downhole environments of conventional onshore oil wells. The H₂S sour service grade uses special anti-sulfur corrosion alloy metal as base material, fully compliant with international sour service industry standards, which effectively resists sulfide stress cracking and uniform metal corrosion under harsh high hydrogen sulfide, high chloride corrosive sour gas well downhole fluid environments. Clients can select corresponding grade model according to the hydrogen sulfide content of downhole formation fluid in their target construction wells.
Q4: What production tubing size ranges and AMMT connection thread specifications do standard hydraulic tubing end locator models cover?
Our full series standard hydraulic tubing end locator product line covers three mainstream production tubing outer diameter ranges widely applied in global oilfield completion projects: 2-3/8"~2-7/8", 2-7/8"~3-1/2", and 3-1/2"~4-1/2". The product line provides two industry standard AMMT premium tubing connection thread specifications: 1" AMMT thread matched for the smallest 2-3/8"~2-7/8" tubing range, and 1-1/2" AMMT thread applied for medium and large tubing ranges including 2-7/8"~3-1/2" and 3-1/2"~4-1/2". All AMMT thread machining complies with unified international oilfield precision forging standards, supporting direct seamless assembly with mainstream completion tubing strings worldwide without extra transition adapter subs.
Q5: Can customized non-standard specification hydraulic tubing end locators be produced for special oilfield construction requirements?
Yes, we provide comprehensive customized professional engineering solution services for all global oilfield service clients. We can design and manufacture hydraulic tubing end locators with non-standard tool outer diameter sizes, modified overall make-up assembly lengths, special customized non-standard connection thread specifications and enhanced high-corrosion resistant alloy material versions strictly in accordance with clients’ technical drawing documents and field well downhole working condition fluid parameters. Besides customized size and thread specifications, we can also adjust internal hydraulic drive structure parameters to adapt ultra-high temperature or ultra-high pressure special downhole well environments for offshore oilfield completion construction projects.
We are a professional integrated OEM & ODM manufacturer focused on independent research & development, precision forging production and global sales of full-series oilfield completion, stimulation and workover downhole intervention tools. We supply high-performance hydraulic tubing end locators, mechanical casing collar locators, packer setting tools, tubing running subs, weight bars, completion auxiliary positioning accessories and a full range of matched supporting downhole service tools for global onshore and offshore oil & gas field completion tubing running, reservoir acidizing/fracturing stimulation and routine well workover construction projects. All our oilfield downhole tools adopt standardized metal forging and precision CNC machining production processes, and pass multiple rounds of rigorous factory performance testing including hydraulic cycle fatigue resistance, connection thread tensile load stability and positioning signal sensitivity calibration testing, featuring stable long-term downhole working performance and excellent comprehensive cost performance ratio compared with imported foreign brand equivalent products. Whether you need standard specification STD carbon steel or H₂S sour resistant alloy hydraulic tubing end locators matched with mainstream production tubing size ranges, integrated completion tubing string matching design technical solutions for large-scale well completion project bidding, or customized non-standard size high anti-corrosion alloy hydraulic tubing end locator versions for harsh sour gas well and offshore ultra-high temperature-pressure downhole construction environments, please feel free to contact our professional oilfield engineering technical support team. We will provide targeted professional hydraulic tubing end positioning downhole tool matching solutions, complete detailed technical datasheets with full specification parameters and competitive factory bulk wholesale quotation documents within 24 working hours upon receiving your inquiry demand.
