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Check Valves
The Dual Flapper Check Valve Assembly prevents wellbore fluid from reversing flow direction into the work string via the Bottom Hole Assembly (BHA) and is the primary means of internal well control at the working depth.
This critical component is equipped with high performance elastomeric seals for optimum sealing & reliability as well as flow activation as an additional redundancy measure. Large thru-bore accommodates large drop balls for ball-activated tools below. The two flapper cartridges are easily removed and replaced at the field level if required.
Design Features:
- Simple redress can be performed at the field level
- Large thru-bore
- Robust design for milling & jarring operations
- Redundant flapper cartridge for safety
- High quality seals for maximum sealing
Technical Specifications
Engineered as the primary means of internal well control at working depth, each configuration prevents wellbore fluid from reversing flow into the BHA. Dual flapper cartridges provide redundancy, while the large thru-bore accommodates drop balls for activation of tools below. Built for milling and jarring operations where seal integrity and field-level serviceability matter.
| TOOL OD | STANDARD CONNECTIONS | TENSILE YIELD | TORSIONAL YIELD (FT-LBS) | INTERNAL YIELD PRESSURE |
| 42.86mm (1.690″) | 1.00″ AMMT | 24,553 daNs 55,000 lbf | 820 | 68.9 MPa 10,000 PSI |
| 54mm (2.125″) | 1-1/2″ AMMT | 45,982 daNs 103,000 lbf | 1,600 | |
| 60.3mm (2.375″) | 1-1/2″ AMMT | 47,366 daNs/ 106,100 lbf | 1,600 | |
| 73mm (2.875″) | 2-3/8″ PAC | 93,750 daNs 210,000 lbf | 4,800 | |
| 79mm (3.125″) | 2-3/8″ REG | 93,750 daNs 210,000 lbf | 4,800 |
Hydraulic Disconnects
TEC’s Heavy Duty Hydraulic Disconnect (HDD) is designed to withstand the tremendous impact administered by leading edge anti-friction tools and high torque motors.
This release tool is ball activated and will initiate a disconnect by pumping a drop-ball through the work string, landing on a piston seat within the tool. This creates differential pressure which ultimately shears the disconnect mechanism inside.
Once released, the upper section of the disconnect tool & bottom hole assembly will part, leaving a clean profile downhole for a wide array of fishing options. Standard with all 2.875” and 3.125” sized HDD tools is a #3 GS internal profile for slim-hole recovery options.
This tool is simple to redress and maintain, helping to maintain its reliability.
Design Features:
- High torsional yield for high-torque milling operations
- Robust design for milling & jarring operations
- Customizable shear values and ball sizes
- Highly dependable & durable
Technical Specifications
Engineered to withstand the impact from anti-friction tools and high-torque motors, each configuration releases via ball activation when differential pressure shears the internal mechanism. Customizable shear values allow precise release pressure, while the clean downhole profile after disconnect provides multiple fishing options. Built for operations where getting stuck means you need a reliable way out.
| TOOL OD | MINIMUM YIELD POINT & LOAD TO YIELD | TORSION WEAK POINT & LOAD TO YIELD | PSI TO RELEASE PER SHEAR SCREW | SHEAR SCREW SIZE | O-RINGS | DISCONNECT BALL SIZE |
| 42.86mm/ 1.690″ | Bottom Sub 1.000″ AMMT Pin Connection 25,334 daN/ 56,750 lbf Internal B&W Fishing Neck Strength 22,500 daN/ 50,400 lbf (note fishing neck is not tensile loaded when assembled, above number is used as a guide line when fishing bottom sub with pulling tool) | Bottom Sub 1.000″ AMMT Pin Connection 638 ft-lbs | 1,700-2,100 (NO SHEAR SCREWS) 2,378-3,138 (1 SHEAR SCREW) 3,416-4,176 (2 SHEAR SCREWS) 4,454-5,214 (3 SHEAR SCREWS) 5,492-6,252 (4 SHEAR SCREWS) 6,530-7,290 (5 SHEAR SCREWS) 7,568-8,328 (6 SHEAR SCREWS) | 10-32 UNC X 3/16″ | FLOW TUBE 2-018 (1) TOP SUB 2-123 (1) 2-123BU (2) SUPPORT PISTON 2-118 (1) | 1/2″ |
| 54mm/ 2.125″ | Bottom Sub 1.500″ AMMT Pin Connection 55,491 daN/ 124,300 lbf Internal Custom Fishing Neck Strength 33,616 daN/ 75,300 lbf (note fishing neck is not tensile loaded when assembled, above number is used as a guide line when fishing bottom sub with pulling tool) | Bottom Sub 1.500″ AMMT Pin Connection 1,770 ft-lbs | 1,900-2,400 (NO SHEAR SCREWS) 2,581-3,081 (1 SHEAR SCREW) 3,262-3,762 (2 SHEAR SCREWS) 3,943-4,443 (3 SHEAR SCREWS) 4,624-5,124 (4 SHEAR SCREWS) 5,305-5,805 (5 SHEAR SCREWS) 5,986-6,486 (6 SHEAR SCREWS) | 10-32 UNC X 1/4″ | TOP SUB 2-128 (1) 2-128BU (2) SUPPORT PISTON 2-122 (1) | 3/4″ |
| 73mm/ 2.875″ | Bottom Sub 2.375″ PAC Pin Connection 88,705 daN/ 198,700 lbf Internal 3″ GS Fishing Neck Strength 65,223 daN/ 146,100 lbf (note fishing neck is not tensile loaded when assembled, above number is used as a guide line when fishing bottom sub with pulling tool | Bottom Sub 2.375″ PAC Pin Connection 4,800 ft-lbs | 1,900-2,300 (NO SHEAR SCREWS) 2,488-2,888 (1 SHEAR SCREW) 3,076-3,476 (2 SHEAR SCREWS) 3,664-4,064 (3 SHEAR SCREWS) 4,252-4,652 (4 SHEAR SCREWS) 4,840-5,240 (5 SHEAR SCREWS) 5,428-5,828 (6 SHEAR SCREWS) | 1/4-20 UNC X 5/16″ | TOP SUB 2-226 (1) 2-226BU (2) SUPPORT PISTON 2-222 (1) 2-222BU (1) | 7/8″ |
| 79mm/ 3.125″ | Top Sub Collet Section 100,446 daN/ 225,000 lbf Internal 3″ GS Fishing Neck Strength 117,723 daN/ 263,700 lbf (note fishing neck is not tensile loaded when assembled. This number is used as a guide line when fishing bottom sub with pulling tool) | Bottom Sub 2.375″ REG Pin Connection 5,800 ft-lbs | 1/4-20 UNC X 5/16″ | TOP SUB 2-226 (1) 2-226BU (2) SUPPORT PISTON 2-222 (1) 2-222BU (1) | 7/8″ |
Dual Activated Circulating Sub
The Dual Activated Circulating Sub has two important functions:
Allow pressure relief by applying internal pressure on a rupture disc (burst disc) and overcoming the rupture disc’s burst value, which is pre-determined prior to running the tools in hole. This may be necessary if the flow path is restricted to the tools below, to create a secondary flow path so as to deploy a drop-ball.
The second capability of the Circulating Sub is a ball-activated option in which a drop-ball can be deployed via fluid to a piston seat within the Circulating sub to shear a piston, opening up (3) large ports to the annulus allowing pump rates to exceed motor flow rates as well as isolating the flow path to all the tools below the Circulating Sub in the Bottom Hole Assembly.
Design Features:
- Simple Redress at the Field Level
- (3) 3-/8” (9.5mm) Ports to Annulus for High Flow Rates
- Robust Design for Milling & Jarring Operations
- Various Pressure Values Available for Burst Disc Option
- 3/4” (0.750”/ 19.05mm) Drop Ball
Technical Specifications
Engineered with dual activation modes, each configuration opens either via burst disc pressure relief or ball-activated shear piston. Three large ports to annulus allow pump rates to exceed motor flow rates while isolating tools below. Built for operations requiring pressure relief options or the ability to bypass sensitive BHA components during acid or nitrogen exposure.
| TOOL OD | TENSILE YIELD | TORSIONAL YIELD | STANDARD DROP BALL SIZES | SHEAR SCREW PRESSURE VALUE | PRESSURE RATING | STANDARD CONNECTIONS |
| 73mm 2.875″ | 93,750 daN 210,000 lbf | 3,900 ft-lbs | 0.750″ | 1,595 PSI/ SHEAR SCREW | 68.9 MPa 10,000 PSI | 2-3/8″ PAC |
Milling Circulation Sub
TEC’s milling circulation sub is designed to be run in conjunction with a mud motor and extended reach tool. Standard dual activated circulating subs can open unintended via the reciprocating motion of the extended reach tool, rendering the BHA inoperable. TEC’s design features an internal mechanism for pressure balance to ensure the piston is in the closed position and a premature shear event is not possible. Opens only when intended.
Technical Specifications
Engineered with internal pressure balance to prevent premature opening during extended reach tool reciprocation, each configuration only activates when intended via ball deployment. The closed-position mechanism eliminates unintended shear events that render standard circulating subs inoperable. Purpose-built for mud motor and extended reach applications where false activation isn’t an option.
| TOOL OD | TENSILE YIELD | TORSIONAL YIELD | STANDARD DROP BALL SIZES | SHEAR SCREW PRESSURE VALUE | PRESSURE RATING | STANDARD CONNECTIONS |
| 73mm 2.875″ | 99,640 daN 224,000 lbf | 4,300 ft-lbs | 0.750″ | 1,065 PSI/ SHEAR SCREW | 68.9 MPa 10,000 PSI | 2-3/8″ PAC |
TEC Complete 42.9mm (1.690”) Motor Head Assembly
TEC’s Heavy Duty Motor Head Assembly is an integrated set of tool string components which incorporates a variety of features including a dual-flapper check valve assembly, a ball-activated disconnect and a dual-activated circulating sub in one compact unit. The tool also features torque-thru capability as well as a standard internal GS fish neck profile.
The dual flapper check valves prevent backflow from the well bore into the tubing above. The disconnect component provides a means of releasing the work string from the stuck BHA by deployment of a drop-ball, and the circulating sub introduces a flow path to the annulus, bypassing the BHA components below. This is useful for isolating motors and other sensitive equipment from acid or nitrogen exposure, as well as allowing increased flow rates for specialized applications. In addition, if for any reason circulation through the tool string is lost, an overpressure-activated piston is also incorporated. This is the most comprehensive instrument for small diameter re-entry applications available.
Design Features:
- High torsional yield for high-torque milling operations
- Robust axial strength for milling & jarring operations
- Customizable shear values
Technical Specifications
Engineered as an integrated unit combining check valve, ball-activated disconnect, and dual-activated circulating sub in one compact assembly. Torque-thru capability and internal GS fish neck profile provide maximum functionality for small diameter re-entry applications. Built for operations where space is limited but comprehensive well control, disconnect capability, and circulation options can’t be compromised.
| TECHNICAL SPECIFICATIONS | |
| TOOL OD | 1.690″ 42.90mm |
| CONNECTION | 1.000″ AMMT |
| DISCONNECT DROP BALL | 0.500″12.70mm |
| DISCONNECT SHEAR SCREW VALUE/ SCREW | 1,000 psi |
| LENGTH AFTER DISCONNECT | 11.38″ 0.29m |
| CIRC SUB DROP BALL | 0.438″11.12mm |
| CIRC SUB SCREW VALUE/ SCREW | 1,050 psi |
| TYPICAL CIRCULATING OVER-PRESSURE (PER SHEAR SCREW) | 2,450 psi |
| MAKE-UP TORQUE SPECIFICATIONS | 250 ft-lbs |
| PULLING TOOL REQUIRED | 03-02-GS-200-A0 |
| TENSILE YIELD | 33,100 lbf 14,776 daN |
| MAX FISHNECK LOAD | 30,200 lbf 13,482 daN |
Real Results Delivered.
MA Permian Success.
Every well where the Universal Jet Thruster (UJT) was incorporated into the milling BHA was faster completing the plug milling than BHAs without it. Fastest long, lateral mill out time EVER for Top American Producer had the UJT in the Milling BHA!
Avg ft / min: 7.4
MA Permian Success.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque sit amet pharetra sem. Morbi gravida sapien luctus risus mollis mattis. Sed justo dui, feugiat nec ornare et, viverra et purus. Vestibulum tincidunt convallis nibh, in viverra tortor euismod ac. Suspendisse eu lobortis ipsum, at convallis urna.
Avg ft / min: 7.4
MA Permian Success.
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Avg ft / min: 7.4
MA Permian Success.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque sit amet pharetra sem. Morbi gravida sapien luctus risus mollis mattis. Sed justo dui, feugiat nec ornare et, viverra et purus. Vestibulum tincidunt convallis nibh, in viverra tortor euismod ac. Suspendisse eu lobortis ipsum, at convallis urna.
Avg ft / min: 7.4