Page 406 - Practical Well Planning and Drilling Manual

Section 3 revised 11/00/bc 1/17/01 12:00 PM Page 382

[ ] Practical Wellsite Operations
3.4.1

2. For welding, ensure that three or four welding machines plus con-
sumables and welders are available. If required, ultrasonic weld
testing equipment and an operator should be sent out.
Nondestructive testing (NDT) is normally done only for free-
standing conductors but company policies or government regula-
tions may require it.
3. A section of conductor for the splash zone needs proper protection
against corrosion. This may involve blasting and painting with
special protective paint.
4. The hammer size will depend on the size and weight of pipe to be
driven. Check that the rig crane can lift on the complete hammer
without having to disassemble and reassemble on the rig site; this
will save rig up time.
5. Check that the rotary table diameter is greater than the conduc-
tor OD.
6. Conductor may be run on slings attached to padeyes welded on to
the conductor. The conductor is landed at the rotary on the
padeyes. After making up the next joint, these padeyes are burned
off. In this case, preparation will include welding on those
padeyes and testing to ensure that they will hold the weight of the
conductor string below; ultrasonic and/or load testing.
Appropriate length and rating of slings and shackles from the
padeyes to the block are needed.
7. If the conductor is to be run using slips, clamp, and elevators
rather than padeyes then they need arranging.
8. Generally, a survey is run inside the conductor once driven. This
can be done through drillpipe on slickline on the cleanout trip.
Either run a Totco survey to confirm that the pipe is at or nearly
vertical or a gyrosurvey if it is not expected to be vertical (e.g., a
directionally driven conductor) or if the position needs to be accu-
rately known because of close proximity of adjacent conductors.
The gyrosurvey kit including winch and surveyor need to be sent
out in time.

Jetting in the conductor. The conductor is made up and a jetting
sub on HWDP is run about 2 ft inside the shoe that makes up to the
conductor running tool. The conductor and jetting assembly is run on

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