engineering

OneSubsea

OneSubsea is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand OneSubsea rather than just read about it. In short: OneSubsea is a SLB company, headquartered in Oslo, Norway and Houston, Texas, United States. The company is a subsea supplier for the subsea oil and gas market.

Key takeaways

OneSubsea belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect OneSubsea to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of OneSubsea from memory before moving on to harder problems.

Reference excerpt

OneSubsea is a SLB company, headquartered in Oslo, Norway and Houston, Texas, United States. The company is a subsea supplier for the subsea oil and gas market. As of August 2024, the company was the world’s largest in terms of installed subsea christmas trees

History In November 2012, Cameron International and Schlumberger announced that they were forming a Joint venture called OneSubsea. Cameron would manage OneSubsea with a 60% interest, with Schlumberger retaining 40%. In January 2015, Helix, OneSubsea and Schlumberger formed the Subsea Services Alliance to develop technologies and deliver equipment and services to optimize the value chain of subsea well intervention systems. In July 2015, Subsea 7 and OneSubsea entered into an agreement to form a non-incorporated alliance. The alliance was formed to focus on subsea production systems (SPS) and subsea processing systems, subsea umbilicals, risers and flowlines systems (SURF), and life-of-field services. In August 2015, OneSubsea was awarded a contract to supply subsea processing systems for Shell's Stones development in the Gulf of Mexico. Schlumberger announced in August 2015 that it was acquiring Cameron and OneSubsea for $14.8 billion. Schlumberger announced in August 2022, that OneSubsea was going into a joint venture with AkerSolutions and Subsea7. The ownership of OneSubsea is 70% with Schlumberger, 20% with AkerSolutions and Subsea7 owning the last 10% In July 2024, it was announced that OneSubsea was awarded the contract to front-end design an all electric subsea tree project from Equinor called Fram-Sør. managed by LD.

Worked examples

Example 1 — a first encounter with OneSubsea

Start with the simplest possible case. Write down what OneSubsea claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to OneSubsea before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about OneSubsea ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of OneSubsea

In research: OneSubsea appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses OneSubsea in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: OneSubsea is common in secondary-school and first-year university syllabi. It links to neighbouring topics Energy engineering and contractor companies, Manufacturing companies based in Houston, Multinational companies headquartered in the United States, so understanding it makes those chapters shorter.
In everyday life: Look for OneSubsea outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study OneSubsea in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what OneSubsea means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain OneSubsea out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is OneSubsea in simple terms?

OneSubsea is a SLB company, headquartered in Oslo, Norway and Houston, Texas, United States. The company is a subsea supplier for the subsea oil and gas market.

Why does OneSubsea matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study OneSubsea?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on OneSubsea.