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This document contains interview questions and answers related to drilling rig operations. It discusses the functions of mud such as cooling the drill bit, carrying cuttings, and maintaining downhole pressure. It also describes the purpose of various mud handling equipment like shale shakers, desanders, and degassers which remove cuttings and contaminants from the mud. The document provides steps for checking mud pumps and cleaning mud tanks. It defines terms like sweep and spot mud and discusses why cooling systems are used on mud pumps.

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Shakeel Ahmed
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2K views8 pages

Www.petroleumbook.com

This document contains interview questions and answers related to drilling rig operations. It discusses the functions of mud such as cooling the drill bit, carrying cuttings, and maintaining downhole pressure. It also describes the purpose of various mud handling equipment like shale shakers, desanders, and degassers which remove cuttings and contaminants from the mud. The document provides steps for checking mud pumps and cleaning mud tanks. It defines terms like sweep and spot mud and discusses why cooling systems are used on mud pumps.

Uploaded by

Shakeel Ahmed
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Derrickman interview questions with answers

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Tell me about yourself or Introduce your self in English?
the beast answer for this question from this site introduce your
self in English
What is the function of Mud?
cool and lubricate the drilling bit
carry cutting from the bottom of the hole to the surface
Drilling mud know as hydrostatic pressure which allow to
control the formation pressure

Clean drill bits ,drilling mud removes cutting from bit teeth
which prevent bit ball up situation
prevent formation damage by using suitable drilling mud
Transmit hydraulic horsepower to the bit
To avoid bit to balled up

What is the functions of Shale


shaker,Desander,Degasser,Mud
cleaner,Deselter and Center fuger?
shale shaker

Shale shaker: remove big cutting from mud


(74) micron

Desander: remove sand from mud less than (74


-40micron)
working pressure (35-45) psi. capacity
500gpm/cone

Deselter : remove salt from mud less than (40 -


20 micron)
Working pressure (35-45) psi. capacity 75
gpm/cone

Degasser : remove gases from mud working


pressure (35-45) psi

Mud cleaner : remove cutting from 20 micron


to 7 micron
Capacity 75gpm/cone

Center fuger :remove cutting from mud less


than 7 micron to 4 micron

How many tanks you have on rig?

shaker tank-suction tank-reserve tank-trip tank-


intermidate tanke mixing tank
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What is function of Trip tank?

It is used to check the well for losses or gain


during tripping or wire
line operation

What are the steps to check on mud pump?


drilling pump

Permit to work
Per job safety meeting
Electric isolation and put safety lock behind
pump
Close discharge valve - open pleed valve -then
close suction valve
Check pump and replace parts
Remove tools from pump area
Open discharge valve-close pleed valve-open
suction valve
Remove safety lock and isolation
Cleen cooling tank and fill it
close work permit

What diffrance between sweep and spot?


High viscous mud to circulate hole cleen
High viscous mud to put on bottom before trip

Why we using cooling system in mud pump?


To cooling pistons , liners ,seats

When you need to change valve in pump?


Having cracked valve or change seat

When you need to change piston in pump?


Having cracked piston or change liner

What are P.P.E using while mixing?


Ruber shoes,ruber golvses,helmt,apron,covrol

What is slug mud?


Heavy mud using berfore triping out to save
mud and cleen pipes

What are the steps to cleen mud tanks?


Work permit
Messure gases with multi gas detector-
Cleen tanks
Close work permit

What time of greasing crown?


Every day

How you can calculate mud tank size?


Lenth* width* height =/5.614 =. bbls
Whats the hydrostatic pressure?
Ph is the pressure exerted by the weight of a
liquid on its container
Ph is the pressure exerted by the drilling fluid to
offset the pressure exerted by the formation
fluid
Ph (PSI) = 0.007 * TVD (ft) * Mud wt. (pcf)
Ph (PSI) = 0.052 * TVD (ft) * Mud wt. (ppg)
Sufficient hydrostatic pressure is required to
prevent the borehole wall from caving in and to
keep formation fluid from entering the
wellbore

What is the relationship between the Water losses and


filter cake?
Filter cake increase with water losses increase-

what will happen when sand found with drilling mud?


Damage in pump parts
Rig down time- Reduce rate of penetration
Cause bit nozzle plug
For more exam visit
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