Most of these sentences are wrong. Correct them where necessary.

1) Wildcats are drilling units used to drill exploratory wells.

2) Exploratory wells are drilled to control development of commercial deposits.

3) Production wells are spudded to recover oil and gas from subsurface reservoirs.

4) Injection wells are used to inject water or gas into producing horizons in order to maintain formation pressure.

5) By method of impact on rocks drilling can be divided into vertical, directional and horizontal.

6) By wellbore direction drilling can be divided into mechanical and non-mechanical.

7) Extended reach drilling and deviation drilling are similar.

8) Extended reach drilling is a type of drilling with an angle to vertical line and directional drilling is a type of drilling with an angle to stratification, which is not always horizontal.

9) Horizontal drilling can be also used to connect two oil-bearing formations.

10) Any well penetrating formations along stratification can be called horizontal.

6. Imagine you are making a consistent presentation at the conference on the topics "Development oil and gas fields in Russia" or "Well drilling is sometimes a complex, painful process". Use some useful phrases as many as you can for your conference speech from the list below:

- This afternoon I want to deal with ...

- The subject of today's discussion is ...

- Last time we talked about... today I shall be talking about...

- Let's look first of all at...

- The first thing we have to consider is ...

- Perhaps we should first look at...

- Well, we know that...

- We can divide ... up into three (four) headings

- Well, now we've given the main outline, we can ...

- Let's look then at...

- And I think you'll probably agree that...

- Well, I think, that's all I have to say on ...

- Perhaps you would like me to answer questions at this point....

PRACTICING IN TRANSLATION

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