Oil & Gas Pipeline

Onshore pipeline construction from right-of-way to commissioning.

Overview

Complete mainline construction

We build onshore oil and gas pipelines, including large-diameter transmission lines, using our own crews and equipment spreads.

Right-of-way clearing, grading and access roads
Pipe hauling, stringing and cold bending
Mechanized and manual welding and NDT
Weld repairs, field-joint coating and holiday testing
Trenching, lowering-in and backfill
Road, river and wetland crossings
Hydrostatic testing, drying and reinstatement

Welder at work on a pipeline joint inside a welding shelter — Field Welding by Our In-house Pipeline Welders

How We Build

The construction spread

Clearing and grading equipment

01

Prepare

Survey, clearing, grading and access.

Weld shacks on side-boom tractors over the pipe string

02

Weld

Root, hot, fill and cap passes, then NDT and coating.

Sidebooms lowering the pipe string into the trench

03

Install

Trench, lower-in, tie-in and backfill.

Hydrotest header and pump, with the right-of-way reinstated

04

Test & Restore

Hydrotest, cleanup and reinstatement.

Right-of-way clearing and access roads: survey and staking, clearing, topsoil stripping, grading, erosion control, access roads, temporary bridges, pipe haul, stringing and field bending

The firing line: joint preparation, root, hot pass, fill and cap stations, visual check, AUT, repair, field-joint coating and holiday test

Trenching, lowering-in and reinstatement: trenching, rock trenching, dewatering, bedding, lowering-in, padding, backfill, topsoil replacement, reinstatement and pipeline markers

Side views, not to scale. Click any diagram to enlarge.

In the Field

Pipeline construction at work

Line pipe stockpiled in the pipe yard with a crawler crane for handling — Pipe Yard and Stockpiles (48")

Coated line pipe joint on a flatbed trailer hauled along the right-of-way — Pipe Hauling

Sideboom stringing a coated pipe joint along the right-of-way — Pipe Stringing 1

Sideboom stringing a concrete-coated joint — Pipe Stringing 2

Internal line-up clamp inserted in the end of a concrete-coated pipe — Internal Clamp (IPLC 46-48")

Sidebooms holding joints for line-up with the internal clamp crew — Line-up Using Sidebooms and Internal Clamp

Welder qualification test in progress inside a welding tent, watched by inspectors — WPQT (Welder Pre-qualification Test)

Two welders making a girth weld inside the welding shack — Welding in the Shack

Completed girth weld on large-diameter pipe — Completed Girth Weld

Welded concrete-coated pipe string along the right-of-way — Welded Pipe String

Line of sidebooms lowering pipe into the trench — Lowering-in with Sidebooms

Three sidebooms lowering a large-diameter pipe string into the trench — Lowering-in: Three-sideboom Lift

Sidebooms lowering the pipe string together into a wet trench — Synchronized Lowering-in

Pipeline crossing: pipe in a dewatered trench beneath a temporary access bridge, with sideboom support — Crossing

Coated pipe with a field bend in the trench — Bends and Tie-ins

Crew completing a tie-in in a wet trench — Tie-in in Wet Ground

Crew with a cleaning pig at the pig launcher — Cleaning and Gauging

Pig receiver and test header in a pit — Pre-commissioning Hydrotest

Discuss your pipeline project with us.

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