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Collet Connector Systems

Maximum Reliability and Lowest Installed Cost

The HydroTech diverless collet connector system gives you

everything you need for making fast, reliable ROV-assisted pipeline

or flowline connections up to 42 inches in diameter and up to

15,000 psi working pressure. No other diverless collet connector

gives you all the features you get with the HydroTech system:

A proven, versatile design with standard configurations for

almost any application

Lowest installed cost Fast installation and testing with ROV

Metal seal with the highest external pressure rating

High bending/torsional capacity

Reversible operation using an ROV

Following is a brief overview of the basic HydroTech collet

connector, deployment systems and accessories.

Typical Applications

HydroTech collet connectors are most commonly used for final

hook-up of subsea production systems with hard-pipe or flexible

pipe jumpers between pipeline end manifolds (PLEMs) and other

manifolds or production trees. They also find application for

diverless pipeline repair systems and for future pipeline tie-in

systems.

System Components Include

Collet connector collet actuator and ROV control panel ROV-

operable end closures and pig launchers and receivers as required

remote seal removal/replacement tools custom components as

needed.

The heart of the system is the HydroTech collect connector, which

has been used successfully for more than 140 connections in

waters around the world. This compact, robust, and easy-to-install

connector has set the industry standard for price, performance, and

reliability. It also holds the world depth record for diverless pipe

connections: 5,300 ft (1,615 m).

Configurations for Every Application

HydroTech collect connector systems are available to meet

virtually any project requirements. The following basic

configurations are standard:

Horizontal Stab with Retrievable Actuator

Vertical Stab with Retrievable Actuator

Vertical Stab with Internal Actuator

Vertical Stab & Hingeover

For first end make-up and pipe layaway.Each of these is available

with either single or multiple bores.

The Most Economical Connection

HydroTech collet connectors cost less than competitive

connectors, because they are standardized and versatile, and they

don't have to be re-engineered for most applications. Neither do

Collet Connector-Section View

Collet Connector

the system accessories. Moreover, when installation costs are also

considered, HydroTech collet connectors give you the most

economical subsea connection by a significant margin. Compared to

other diverless connectors, they are light and compact and can be

installed using smaller, less costly ROV support vessels. And, they

can be installed and tested much more quickly than other

connectors.

Fastest Installation & Testing

The entire ROV-assisted connection process, excluding run time,

but including initiation of the seal test, is usually completed in 30

minutes or less. In the North Sea, for example, four jumpers with

HydroTech multi-bore collet connectors at each end were installed

and tested in 1,150 ft (350 m) of water in only 16 hours.

Metal Seal

The HydroTech metal seal was developed specifically for collet

connector applications. Its composite-metal construction (patent

pending) provides a 'forgiving' sealing surface that can flow into

hub imperfections, should damage occur, assuring a gas-tight seal.

The seal has an external pressure rating equal to its internal rating,

an important feature for ultra-deepwater applications. The seal also

can be removed and installed remotely, using ROV-operable tools.

Reversible Connection

If a situation arises that requires completion components to be

retrieved, the HydroTech collet connector can be reversed and

released with a simple ROV-operated procedure.

Collet Connector Metal Seal

Vertical Collet Connector with

Retrievable Actuators

Vertical Stab & Hingeover

How the Collet Connector Works

Connector make-up is the same for all configurations. Funnels or guide posts provide coarse alignment

(6, 6 inches) for the mating hubs. After the collet connector is landed, the ROV installs the hot stab

and provides hydraulic power to the stroking cylinders, pulling the hubs together at a controlled rate. The

open collets provide initial make-up alignment to protect the metal seal. The standard design

accommodates up to 2angular misalignment and 1.5 inches axial offset. Once the hubs are mated,

hydraulic collet actuating cylinders close the collet fingers to complete the connection. The collets impart a

preload that gives the connection the same strength characteristics as the pipe. In cone coil springs provide

a passive back-up locking force. The seal is pressure-tested after make-up via the ROV control panel.

Collet Connector Assembly

Multi-Bore Collet Connectors

Dual and multi-bore connectors combine primary flow bores with control or heating lines. The secondary

bores also have metal seals. These collet connectors are installed just like single-bore HydroTech

connectors.

ROV-Operable Accessories

Metal seal installation/removal tools.These contingency tools are normally provided with every collet

connector order. If seal replacement is necessary, the collets are opened and the connector is stroked to

provide access to the seal. The seal removal tool is inserted by the ROV and the connector is stroked. As

the hubs come together, the tool latches onto the metal seal and holds it as the connector is stroked open

again. The seal installation tool works just the opposite.

Oil States Houston provides ROV-operable end closures as needed for line installation.

The basic types are:

Non-pressure-containing debris barriers

Pressure-containing blind closures for manifold or flowline testing

Closures adaptable to pig launchers and receivers

All of these closures are available in both male and female and all are ROV-operable. Pressure-containing

blind closures can also be installed by ROV.Measurement interface caps and fabrication jigs.Oil States

HydroTech provides ROV-operable stab-hub caps that are compatible with orientation and measuring

devices. Systems can also include jigs for fabricating jumpers using the orientation and measurement data.

To view the Collet Connector Systems Brochure & Contacts, click on the corresponding link below:

Collet Connector Systems Brochure

Collet Connector Systems Contacts

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