CRT Collet Running Tool for Liner Hangers | Schlumberger
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CRT

Collet running tool

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Torque rated up to 140,000 ft.lbf [190,000 N.m]
Tensile load rated up to 2,036,000 lbm [923,500 kg]

Run COLOSSUS liners and release without rotation

The collet running tool (CRT) is a hydraulically released running tool that requires no rotation to be released from the liner, thereby making it suitable for applications with high-inclination wells. The clutch and premium tool joint connections permit high-torque rotating and drilldown capabilities throughout the liner system. When a rotational liner hanger is deployed, the CRT also enables the liner to be rotated after the liner hanger is set.

The CRT also has a backup mechanical-release mechanism to ensure its release from the liner.

Simplify running with high-pressure liner top packers

The CRT is used to run liner hanger systems that use the LTP Max high-pressure liner top packer or the setting adapter, such as the COLOSSUS CMT cemented liner hanger system and COLOSSUS UNC uncemented liner hanger system. The setting string assembly comprises a CRT, a slick joint, a cementing packoff bushing, a liner wiper plug adapter, and an extension to connect to the running string. A packer dog assembly can also be included if an LTP or LTP Max packer is run.

The tool helps reduce the risk of premature liner release and enhances well stability and safety by adding backlash protection. It also minimizes completion time and improves zonal isolation by enabling liner rotation while running into the well and while cementing.

CRT Collet Running Tool
CRT Collet Running Tool

LTP

V3 liner top packer with hold-down slips

Choose a reliable packer rated up to 10,000-psi [68.9-MPa] differential pressure.

COLOSSUS UNC

uncemented liner hanger system

Simplify liner deployment in nontraditional completions such as slotted liners, screens, multistage stimulation, and steam injection.

COLOSSUS UNC

Uncemented liner hanger system

Simplify liner deployment in nontraditional completions such as slotted liners, screens, multistage stimulation, and steam injection.

HPS

Configurable hydraulic pocket-slip liner hanger

Run long and heavy liners with confidence, even in HPHT conditions, with or without liner rotation during running or cementing.

HCHR

High-capacity hydraulic rotating liner hanger

Deploy heavy and long liners in drilldown applications, even in deep land, deepwater, and HPHT wells, to save time and enable rotation.

LTP Max

10,000-psi liner top packer

Run this V0- or V3-qualified packer above the COLOSSUS CMT liner hanger system in HPHT wells to enable drilldown and rotation.
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Case Study Drilling with Liner Rescues Well in Deepwater Gulf of Mexico and Saves at Least USD 20 Million

Eliminating a dedicated liner run through a high-loss gassy salt zone reduced rig time by multiple days.

Product Sheet CRT Collet Running Tool

The collet running tool (CRT) is a hydraulic-release running tool that requires no rotation to be released from the liner, thereby making it suitable for applications in high-inclination wells.

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