Author Archives: DrillingFormulas.Com

About DrillingFormulas.Com

Working in the oil field and loving to share knowledge.

Oil Field Conversion Part 1 – Area, Circulation Rate, Impact Force

By | | ,
2 Comments

Working in the oil filed, you may need to convert some unit values to another unit valves.  I have some conversion unit specially used in the drilling and working over industry.  I have 3 parts of the oil field conversion unit. This is the first part which is the conversion of Area, Circulation Rate, Impact Force.

The RED number is the conversion unit.

Area

Square inches x 6.45 = Square centimeters

Square inches x 645 = Square millimeters

Square centimeters x 0.155 = Square inches

Square millimeters x 0.00155 = Square inches

Circulation Rate

Barrels/min x 42 = Gallons/min

Cubic feet/min x 0.000472 = Cubic meters/sec

Cubic feet/min x 7.48 = Gallons/min

Cubic feel/mm x 28.32 = Liters/min

Cubic meters/sec x 15850 = Gallons/min

Cubic meters/sec x 2118 = Cubic feet/min

Cubic meters/sec x 60000 = Litres/min

Gallons/min x 0.0238 = Barrels/ruin

Gallons/min x 0.134 = Cubic feet/min

Gallons/min x 3.79 = Litres/min

Gallons/min x 0.00006309 = Cubic meters/sec

Litres/min x 0.00001667 = Cubic meters/sec

Litres/min x 0.0353 = Cubic feet/min

Litres/min x 0.264 = Gallons/min

Impact Force

Pounds x 0.0000445 = Dynes

Pounds x 0.454 = Kilograms

Pounds x 4.448 = Newtons

Dynes x0.00000225 = Pounds

Kilograms x 2.2 = Pounds

Newtons x 0.2248 = Pounds

I hope this conversion unit will be advantageous for you.

Ref book: Formulas and Calculations for Drilling, Production and Workover, Second Edition

West Atlas re-boarded – Photos Included

By | |
Leave a comment

west-atlast-jack-up

Latest information about West Atlas and please find the media release from PTTEP t from the link below. You will see the photos of West Atlas after well control situation burnt the rig and the platform in Timor sea.

http://www.coogeeresources.com.au/uploads/MediaRelease96_23-11-09.pdf

From “Upstream Online” 23/11/09.

Crew Boards Crippled Montara Platform

A three-man team has boarded the Montara wellhead platform for the first time since a blowout at the Timor Sea installation on 21 August.

The crew, from Alert Well Control, are evaluating the damage to the Seadrill-owned jack-up West Atlas and the platform, PTTEP said.

The evaluation will also include a safety assessment as PTTEP considers how best to plug and fully secure the Montara H1 well.

PTTEP said the wellhead platform and blown-out H1 well remain stable after the leaking bore was successfully killed on 3 November.

Company director Jose Martins said a preliminary assessment of the rig shows extensive damage to equipment from a fire which erupted on the wellhead platform on 1 November.

He said the reboarding team were surveying the structural integrity of the West Atlas’ cantilever which buckled in the platform fire.

“PTTEP will ensure everything possible has been done to assess the risks before undertaking the plugging operation. The safety of personnel remains our first priority,” Martins added.

Geological Description Part 2 (last part)

By | |
Leave a comment

clay stone and shale=Clay Stone & Shale (Clst&Sh).

Clay Stone & Shale are formed from accumulation of clay minerals and silt particles. Its grain size is less than 4 microns.

 

 

marl= Marl (Mrl).

Marl is formed from accumulation of clay minerals and calcium carbonate (calcite) and its grain size is less than 4 microns.

 

sand stone= Sandstone (Sst)

Sandstone is formed of accumulation of mineral grains (quartz) and its grain size is from 60 microns to 2 mm.

 

silt stone= Siltstone (SLst)

Siltstone is formed of accumulation of mineral grains (quartz) and its grain size is from 4 to 60 microns.

 

conglomolate= Conglomerate (Cgl), its grain size is greater than 2 mm.

Conglomerate is formed from accumulation of primarily granule, pebble and boulder size particle.

 

fault= Geological fault

 

Geological Description Part 1

By | |
1 Comment

It is very important to understand what geological description used in oil filed business. Hence, I collect the geological description from the book in order to be your reference and you will be able to understand meaning of each photo describing type of rock.

lime stone = Limestone (Ls)

dolomite and shalk = Dolomite&Chalk (Dol & Chk)

chert = Chert (Cht)

Limestones, Dolomite and Chalk are formed from large deposit of calcium carbonate (calcite) and calcium magnesium (dolomite).

gypsum = Gypsum & Anhydrite (Gyp & Anhy)

salt = Salt (Sa)

Gypsum, Anhydrite and Salt are composed of minerals precipitated from solution during evaporation of water.

basement = Basement (Bm)

volcanic = Volcanics (Volc)

Basement and Volcanics are formed from the cooling of molten magma.

Oil Well Cementing (Purpose and its importance)

By | | ,
Leave a comment

Purposes of oil well cementing are as follows:

Zonal Isolation: Isolate hydrocarbon pays, water pays, shale, etc.

Seal off lost circulation zones

Hydraulic Seal: Prevent pressure from the undesirable migration of fluid coming up to surface via annulus between casing and hole.

Protect casing: Cement is a protective sheath around casing.

Hold casing and completion string: Cement supports weight of whole string of casing or completion.

The importance to accomplish the primary oil well cementing is  as follows:

Good reservoir management: Good cement will let engineer design to produce hydrocarbon from reservoirs easier because there is no concern related to cement.

Maximize Reserves: Good cement sheath allows good pay sands to produce as maximum as possible because good sands will stop producing earlier due to water load-up or permeability damage.

Save time and cost: A lot of time and money must be spent to perform remedial cement operation which is cement squeeze job by coiled tubing or Hydraulic Work Over. If primary cement can be accomplished, no more time and money is spent out to do remedial work.

The key factors necessary to ensure a successful primary oil well cement job are as follows:

1. Good information: Related information such as calculated hole diameter, hole volume, depth, etc from related personnel is required in order to design cementing programs.

2. Good cementing design: There is a number of cement purposes such as primary cement, cement squeeze, cement plug. To meet the purpose of each job, cementers must design a cementing program in correct and good way.

3. Good procedures: Clear and concise procedure will lead to good job because cementer and assistants can perform the cementing job correctly, fast, safely.

4. Good equipment and experienced personnel: Experienced staff with good equipment can perform great jobs, no lost time, safe and fast.

5. Good centralizer placement: Centralizers help casing in the center of hole. Casing with good centralizer placement, cement can form properly cement sheath around casing.

Ref books: Cementing Technology Books