Development.pptx Presentation

Development: Drilling

THE WELL IS CREATED BY DRILLING A HOLE INTO THE EARTH USING A DRILLING RIG THAT ROTATES A STRING WITH A BIT  A T T A C H E D .

Component needed to drill Drill

pipe Kelly/ top drive Derrik  Draw works Bit Mud

Offshore rigs which classified to: Jackup

rigs !u"mersi"le rigs !emi # su"mersi"le rigs $latform rigs Drill ships

Drilling rig crew  Co%man/

rig supervisor &ool pusher and night pusher Driller Mechanics and electricians Derrick man Crane operator 'loor men (ough necks Motor man

Drilling operation  )fter the hole is drilled* casing that slightly smaller in diameters than the "orehole are placed in the hole% Cement is placed "etween the outside of the casing and the "orehole% Modern wells often have two to five sets of su"se+uently smallest hole si,es drilled inside one each other% -ach cemented with casing% 

Drill collar type: &he

drill "it aided "y the weight of the thick walled pi called drill collar a"ove it that cuts into the rock as the "it turns%

Drilling operation Mud

is the drilling fluid pumped down the inside of the drill pipe and e.its the drill "it% &here are two type of mud : Oil "ased mud   ater "ased mud 

Drilling operation : 0kick1  )

kick is when the formation pressure at the depth of the "it is more than the hydraulic head of the mud a"ove which if not controlled "y closing 2"lowout preventer3 and increasing the density of the drilling fluid would allow formation fluids and mud to come up through annulus uncontrolla"ly%

 ell casing  ell

casing consist of a series of metal tu"es installed in the freshly drilled hole% &ype of casing depend on the su"surface characteristic of the well including diameter of the  well and pressure and temperature in the well%

 ell casing Once

the casing has "een set and in most cases cemented into place* proper lifting e+uipmentis installed to "ring the hydrocar"ons from the formation to the surface%  )fter the casing is installed tu"ing is inserted inside the casing running from the opening well at the top to the formation at the "ottom%

completion Once

the design depth is reached* the formation must "e tested and evaluated to determine wether the well will "e completed for production or plugged and a"andoned%

Completion design criteria $rofita"ility:

provides production optimi,ation and minimi,e operating cost over its life% 'le.i"ility : for handling the current and future pro"lems !implicity : to allow the most efficient installations and maintenance activities%

Classifications of completion: Open

hole completion Cased perforated completion Multiple ,one completion% 

&ype of completion depends on the characteristics and location of the hydrocar"on formation%