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Premium Downhole Oil Tools &
Drill Stem Test Tools

High-pressure, H2S-resistant, NACE MR0175-compliant downhole tools engineered for reliability in extreme well conditions. Manufactured in China under the TECHCORE brand for global oil & gas operations.

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3000+ Tools Delivered

Serving clients in over 40 countries with reliable downhole solutions.

HPHT Certified

Tools rated up to 15,000 PSI and 105 MPa for extreme environments.

NACE Compliant

H2S-resistant materials and strict quality control per MR0175 standards.

Who We Are

ZZ Top Oil Tools Co., Ltd., headquartered in Xi’an, China since 2010, expanded operations in 2016 with the launch of TECHCORE — a dedicated downhole oil tools manufacturing facility in Baoji. Our brand specializes in high-performance downhole tools for drill stem testing (DST), well completion, and intervention services.

With over a decade of engineering excellence, we serve oilfield operators and service companies worldwide, delivering tools that meet API, ISO, and NACE MR0175 standards. Our focus is on durability, safety, and performance under high-pressure, high-temperature (HPHT), and sour (H2S) conditions.

NACE MR0175 H2S Resistant 15,000 PSI Rated Alloy Steel Construction
Downhole Tool Manufacturing Factory Equipment Quality Inspection Tool Assembly

Our Premium Products

Explore our full range of downhole oil tools and drill stem test equipment designed for reliability, safety, and performance in the most demanding well environments.

Retrievable Packer

Retrievable Packer

  • Working Pressure: 15,000 PSI
  • Material: Alloy Steel
  • Application: Drill Stem Testing
  • Standard: H2S Resistant, NACE MR0175
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Coiled Tubing Tools

Coiled Tubing Tools

  • Application: High-Pressure Service
  • Component: Motorhead Assembly (MHA)
  • Pressure Rating: Up to 15,000 PSI
  • Design: For HP/HT Wells
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High Pressure ESP Packer

Hydraulic Setting Packer

  • Type: High Pressure ESP Packer
  • Application: Well Completion
  • Setting Method: Hydraulic
  • Material: Alloy Steel, H2S Resistant
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OMNI Circulating Valve

OMNI Circulating Valve

  • Size: 5 Inch
  • Working Pressure: 15,000 PSI
  • Material: Alloy Steel
  • Application: Oil Well Drilling & Testing
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DST Safety Valve

DST Super Safety Valve

  • Type: Fail Safe Safety Valve
  • OD: 8"
  • Pressure: 10,000 PSI
  • Material: Inconel Steel
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Internal Pressure Operated Valve

Internal Pressure Operated Valve

  • Application: Open Hole Well Testing
  • Operation: Internal Pressure Operated
  • Pressure: 15,000 PSI
  • Type: IPO Circulating Valve
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Mechanical Jar

Mechanical Jar

  • Size: 5"
  • Pressure: 105 MPa
  • Application: Open Hole, TCP Operation
  • Type: High-Pressure Downhole Tool
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Select Tester Valve

Select Tester Valve

  • Size: 5" x 15,000 PSI
  • Standard: Full H2S Service
  • Type: Downhole Tester Valve
  • Compliance: NACE MR0175
View Details
View All 150+ Products

Why Choose TECHCORE?

Engineered for performance, safety, and longevity in the most challenging downhole environments.

NACE Certified

All tools comply with NACE MR0175 for sour service and H2S resistance.

HPHT Rated

Rated up to 15,000 PSI and 105 MPa for extreme pressure and temperature.

Precision Engineering

CNC-machined components with tight tolerances for reliable operation.

Global Delivery

Fast shipping to over 40 countries with responsive technical support.

15,000+
PSI Max Pressure
40+
Countries Served
150+
Product Types
12+
Years Experience

Frequently Asked Questions

What materials are used in your downhole tools?

We use high-grade alloy steel and Inconel materials that meet NACE MR0175 standards for H2S resistance and sour service environments.

Do you offer custom tool configurations?

Yes, we provide OEM/ODM services and can customize tools based on client specifications, pressure ratings, and well conditions.

What is the maximum pressure rating for your tools?

Our tools are rated up to 15,000 PSI (105 MPa), suitable for HPHT well testing and completion operations.

Are your tools compliant with international standards?

Yes, all products meet API, ISO, and NACE MR0175 standards. Certifications are available upon request.

Get In Touch

For quotes, technical support, or product inquiries, visit our official website to connect with our team.

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Head Office: Xi’an, China | Manufacturing Facility: Baoji, China

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