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Engineered as the primary means of internal well control at working depth, dual flapper check valves prevent wellbore fluid from reversing flow into the BHA. Dual cartridges provide redundancy for added assurance that fluid flow stays in one direction. Built for milling and jarring operations where seal integrity must be maintained over harsh operating conditions.
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 | INTERNAL YIELD PRESSURE |
|---|---|---|---|---|
| 1.690" 42.86mm | 1.00" AMMT | 55,000 lbf 24,553 daN | 820 ft-lbs | 10,000 psi 68.9 MPa |
| 2.125" 54mm | 1-1/2" AMMT | 103,000 lbf 45,982 daN | 1,600 ft-lbs | 10,000 psi 68.9 MPa |
| 2.375" 60.3mm | 1-1/2" AMMT | 106,100 lbf 47,366 daN | 1,600 ft-lbs | 10,000 psi 68.9 MPa |
| 2.875" 73mm | 2-3/8" PAC | 210,000 lbf 93,750 daN | 4,800 ft-lbs | 10,000 psi 68.9 MPa |
| 3.125" 79mm | 2-3/8" REG | 210,000 lbf 93,750 daN | 4,800 ft-lbs | 10,000 psi 68.9 MPa |
Engineered to withstand the impact from anti-friction tools and high-torque motors, the HDD releases via ball activation only so the internal mechanism cannot deploy prematurely. Customizable shear values permit operation specific release pressure, while the clean downhole profile post-disconnect provides multiple fishing options. Built for reliability when encountering uncertainty.
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 | FISHING NECK STRENGTH | TORSION WEAK POINT & LOAD TO YIELD | PSI TO RELEASE PER SHEAR SCREW | SHEAR SCREW SIZE | O-RINGS | DISCONNECT BALL SIZE |
|---|---|---|---|---|---|---|---|
| 1.690" 42.86mm | Bottom Sub 1.000" AMMT Pin Connection 56,750 lbf 25,334 daN | 50,400 lbf 22,500 daN | Bottom Sub 1.000" AMMT Pin Connection 638 ft-lbs | 1,700 - 8,328 psi | 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" |
| 2.125" 54mm | Bottom Sub 1.500" AMMT Pin Connection 124,300 lbf 55,491 daN | 75,300 lbf 33,516 daN | Bottom Sub 1.500" AMMT Pin Connection 1,770 ft-lbs | 1,900 – 6,486 psi | 10-32 UNC X 1/4" | TOP SUB 2-128 (1) 2-128BU (2) SUPPORT PISTON 2-122 (1) | 3/4" |
| 2.875" 73mm | Bottom Sub 2.375" PAC Pin Connection 198,700 lbf 88,705 daN | 146,100 lbf 65,223 daN | Bottom Sub 2.375" PAC Pin Connection 4,800 ft-lbs | 1,900 – 5,828 psi | 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" |
| 3.125" 79mm | Top Sub Collet Section 225,000 lbf 100,446 daN | 263,700 lbf 117,723 daN | Bottom Sub 2.375" REG Pin Connection 5,800 ft-lbs | 1,900 – 5,828 psi | 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" |
*Fishing neck is not tensile loaded when assembled, minimal yield point and load to yield numbers are used as a guide line when fishing bottom sub with pulling tool.
*Can be pinned with up to 6 shear screws.
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.
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 |
|---|---|---|---|---|---|---|
| 2.875" 73mm | 210,000 lbf 93,750 daN | 3,900 ft-lbs | 0.750" | 1,595 psi/ SHEAR SCREW | 10,000 psi 68.9 MPa | 2-3/8" PAC |
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.
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 |
|---|---|---|---|---|---|---|
| 2.875" 73mm | 224,000 lbf 99,640 daN | 4,300 ft-lbs | 0.750" | 1,065 psi/ SHEAR SCREW | 10,000 psi 68.9 MPa | 2-3/8" PAC |
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.
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.
| TOOL OD | TENSILE YIELD | TORSIONAL YIELD | STANDARD DROP BALL SIZES | SHEAR SCREW PRESSURE VALUE | PRESSURE RATING | STANDARD CONNECTIONS |
|---|---|---|---|---|---|---|
| 2.875" 73mm | 210,000 lbf 93,750 daN | 3,900 ft-lbs | 0.750" | 1,595 psi/ SHEAR SCREW | 10,000 psi 68.9 MPa | 2-3/8" PAC |