Description
Double-Acting Hydraulic Jarring for High-Temperature Drilling Environments
The QY High-Temperature Full Hydraulic Drilling Jar is developed from the standard QY hydraulic jar for wells requiring higher temperature capability. It provides controlled upward and downward jarring through a hydraulic delay-release system and is specified for operating temperatures not exceeding 204°C.
QY79-QY241
Up & Down Jarring
NC / REG Connections
Quick Answer: When Is a High-Temperature Drilling Jar Required?
A high-temperature drilling jar is selected when the expected downhole temperature exceeds the operating range of a standard jar. The QY high-temperature series retains the double-acting hydraulic jarring function of the standard QY design while extending the specified working-temperature limit to 204°C. This makes it suitable for deep and thermally demanding wells where temperature capability must be considered together with OD, connection, release force, tensile capacity and torque.
Product Highlights
204°C Temperature Rating
Specified for high-temperature drilling environments with downhole temperatures not exceeding 204°C.
Double-Acting Jarring
Supports both upward and downward jarring so the operator can respond to different stuck-string conditions.
Hydraulic Delay Release
A full hydraulic delay-release system allows axial load to build before the jarring stroke is released.
Improved Locking Structure
The high-temperature version incorporates an optimized locking structure to support reliable operation under demanding well conditions.
Sealed Oil-Bath Core
The core mechanism uses a sealed oil-bath design to reduce moving-part wear and support service life.
Surface-Controlled Release Force
The hydraulic release operating force can be controlled through surface axial loading within the selected model limits.
Why the High-Temperature QY Is a Separate Jar Configuration
Temperature is not only a line item on a drilling-jar specification. In deep and high-temperature wells, the jar must maintain its release behavior and internal operating reliability throughout the planned thermal environment. The QY high-temperature series is therefore positioned as a dedicated 204°C configuration rather than simply treating temperature as an optional value on the standard QY product.
For projects where expected bottom-hole temperature requires capability above the standard QY range.
Suitable for deep-well programs where temperature, load capacity and BHA compatibility must be reviewed together.
Provides a double-acting jarring option for complex well profiles within the selected model’s operating limits.
How the QY High-Temperature Hydraulic Jar Works
The jar is installed in the drill string and remains available during normal drilling. If the drill string becomes stuck, axial load is applied from surface. For upward jarring, tensile load is increased until the hydraulic delay-release system reaches the release condition. For downward jarring, controlled compression is applied in the opposite direction.
During the delay period, elastic energy builds in the drill string. When the internal hydraulic release condition is reached, the mandrel moves rapidly and converts the stored energy into an impact. After the jarring stroke, the tool is returned toward the center position and reset for another cycle. This allows repeated impacts in either direction without requiring the jar to be pulled from the well between cycles.
QY High-Temperature Hydraulic Drilling Jar Specifications
The table below converts the supplied QY high-temperature datasheet into searchable technical data. Final model selection should consider temperature, tool envelope, connection, release force, tensile capacity, torsional capacity and the surrounding BHA.
| Model | OD (mm) | ID (mm) | Working Temp. (°C) | Tensile Strength (kN) | Torsional Strength (kN·m) | Up Release Force (kN) | Down Release Force (kN) | Up/Down Stroke | Total Stroke | Connection |
|---|---|---|---|---|---|---|---|---|---|---|
| QY79 | 80 | 25 | 204 | 600 | 6 | 150 | 60 | 10 7/16 in (265 mm) | 20 7/8 in (530 mm) | 2 3/8 REG |
| QY89 | 90 | 32 | 204 | 750 | 7 | 180 | 90 | 10 7/16 in (265 mm) | 20 7/8 in (530 mm) | 2 7/8 REG |
| QY95 | 96 | 32 | 204 | 1000 | 8 | 200 | 100 | 10 7/16 in (265 mm) | 20 7/8 in (530 mm) | 2 7/8 REG |
| QY108 | 109 | 38 | 204 | 1350 | 16 | 250 | 120 | 10 7/16 in (265 mm) | 20 7/8 in (530 mm) | NC31 |
| QY121 | 122 | 50 | 204 | 1950 | 25 | 350 | 180 | 10 7/16 in (265 mm) | 20 7/8 in (530 mm) | NC35 |
| QY165 | 167 | 57 (70) | 204 | 3750 | 70 | 700 | 350 | 12 1/2 in (317.5 mm) | 25 in (635 mm) | NC50 |
| QY178 | 181 | 70 | 204 | 4650 | 80 | 800 | 400 | 12 1/2 in (317.5 mm) | 25 in (635 mm) | NC50 |
| QY203 | 206 | 76 | 204 | 6030 | 135 | 1000 | 500 | 12 1/2 in (317.5 mm) | 25 in (635 mm) | 6 5/8 REG |
| QY241 | 244 | 76 | 204 | 8500 | 165 | 1250 | 650 | 12 1/2 in (317.5 mm) | 25 in (635 mm) | 7 5/8 REG |
Technical values above are based on the supplied QY high-temperature product datasheet. The QY165 ID is listed as 57 (70) mm in the source specification and should be reconfirmed for the final ordered configuration. Connection and operating limits should also be confirmed before manufacture and shipment.
Is Your Maximum Well Temperature Above the Standard QY Range?
Send the expected bottom-hole temperature together with BHA, connection and load information so the jar can be selected around the actual drilling program.
Standard QY vs High-Temperature QY Hydraulic Drilling Jar
These two products serve different thermal operating ranges. The high-temperature page should be selected for projects where the expected downhole temperature exceeds the standard QY specification.
| Selection Factor | Standard QY Hydraulic Jar | QY High-Temperature Hydraulic Jar |
|---|---|---|
| Primary selection intent | General hydraulic drilling-jar applications | High-temperature drilling environments |
| Specified working temperature | Up to 160°C | Up to 204°C |
| Jarring direction | Upward + downward | Upward + downward |
| Release principle | Full hydraulic delay release | Full hydraulic delay release with high-temperature configuration |
| Choose when | The planned well temperature stays within the standard range. | The expected thermal environment requires capability above the standard QY range. |
| Product page | QY Full Hydraulic Drilling Jar | Current Product |
How to Select a High-Temperature Hydraulic Drilling Jar
Use the expected maximum thermal condition, not only the surface or average circulating temperature, when defining the requirement.
Confirm tool envelope, bore requirement and wellbore clearance before selecting the nominal QY model.
Match the jar connection to adjacent drill-string components and minimize unnecessary crossover requirements.
Compare the required up- and down-release force with the selected model and the planned jarring program.
The jar must be evaluated against expected axial loading and torque, not selected by diameter alone.
Jar placement should be coordinated with the complete BHA and the expected sticking mechanism.
Engineering Considerations for High-Temperature Jar Procurement
A high-temperature jar should be purchased as part of a defined BHA operating envelope. The RFQ should identify not only the nominal tool size but also the expected bottom-hole temperature, connection, adjacent string components, planned operating loads and required jarring forces. This allows the selected model to be checked against both mechanical and thermal requirements.
If your BHA includes heavy drill-string components, review the jar together with the
drill collar
and other adjacent tools rather than treating the jar as an isolated component.
Information Required for Quotation
For a useful technical quotation, please send the operating data below together with the required quantity.
Related Drilling Jar Options
QY Full Hydraulic Drilling Jar
Standard full-hydraulic double-acting option for well temperatures within the standard QY operating range.
QJZ Mechanical Drilling Jar
Fully mechanical double-acting alternative for drilling programs that favor mechanical activation.
JYSZ Mechanical-Hydraulic Drilling Jar
Hybrid double-acting jar combining mechanical locking with hydraulic control.
Drill Collar
Review adjacent BHA size, connection and load compatibility when selecting jar placement.
FAQ: High-Temperature Hydraulic Drilling Jar Selection
What is the maximum working temperature of the QY high-temperature drilling jar?
The supplied QY high-temperature specification lists a maximum working temperature of 204°C.
How is this product different from the standard QY hydraulic drilling jar?
The most important distinction is the temperature rating. The standard QY series is specified for temperatures up to 160°C, while this high-temperature configuration is specified for up to 204°C. The final choice should be based on the actual maximum downhole temperature and complete BHA requirements.
Can the high-temperature QY jar work in both jarring directions?
Yes. The QY high-temperature jar is a double-acting design that supports both upward and downward jarring.
Which QY high-temperature sizes are available?
The supplied range includes QY79, QY89, QY95, QY108, QY121, QY165, QY178, QY203 and QY241, covering outside diameters from 80 mm to 244 mm.
What connection options are listed for the series?
Depending on model, the listed connections include 2-3/8 REG, 2-7/8 REG, NC31, NC35, NC50, 6-5/8 REG and 7-5/8 REG.
Should the jar be selected only by temperature and OD?
No. Temperature and OD are only part of the selection process. Connection, ID, release force, tensile capacity, torsional capacity, BHA placement, well trajectory and drilling-fluid conditions should also be reviewed.
What information should be included in an RFQ?
Provide maximum downhole temperature, required OD/ID, connection, hole size, BHA configuration, required upward and downward release force, expected tensile load, operating torque, well trajectory, drilling fluid and quantity.
Select the Jar Around Temperature, Load and BHA — Not Only Tool Size
Send your maximum downhole temperature, connection, BHA envelope and expected operating loads. Shangshanpetro can prepare a model-based quotation for the QY High-Temperature Full Hydraulic Drilling Jar.
