Data Fann VG Suatu Lumpur Sebagai Berikut

7/27/2019 Data Fann VG Suatu Lumpur Sebagai Berikut

1/6

Jawaban Pertanyaan Modul 2

1. Data Fann VG suatu Lumpur sebagai berikut :

Grafik a (cp) terhadap (1/s)

RPM (derajat) (1/s) (dyne/cm2) a (cp)600 64 1022.4 324.928 31.78091

300 42 511.2 213.234 41.71244

200 33 340.8 167.541 49.16109

100 24 170.4 121.848 71.50704

6 11 10.224 55.847 546.2344

3 10 5.112 50.77 993.1534


2/6


3. Apa yang dimaksud dengan aliran laminar, turbulen dan plug flow? Apakah

viskositas dapat mempengaruhi jenis aliran tersebut?

a. Laminar flow : a type of fluid flow in which the direction of flow remainsconstant with time at each point in the flow.

b. Turbulent flow : a type of fluid flow in which the direction of flow changes at

each point in the fluid with time.c. Plug flow : a type of laminar flow in which there is no shearing in the center of

the flow. Plug flow can occur with low velocities in drilling mud during the

drilling well.Viskositas merupakan indikasi tipe aliran fluida, karena merupakan salah satu

variable dalam reynold number yang menggolongkan tipe aliran berdasarkandiameter, laju alir, densitas dan viskositas fluida.

4. Pada pemboran normal, bagaimana kondisi aliran di annulus seharusnya?

Mengapa?

Di annulus yang terjadi adalah aliran laminar, karena di annulus annular pressurelossnya kecil, kurang dari 10 % dari total pressure loss. Dari pressure drop akan

mempengaruhi velocity,oleh karena pressure drop kecil maka aliran laminar.

5. Apa yang dimaksud dengan :

a. Slip velocity

The difference in velocity between two adjacent phases. Slip velocity can be thedifference between fluid velocity in the annulus of a well and the velocity at

which the well cuttings come up the annulus or between two produced fluids.

b. Mud velocity

The velocity of mud in the drill string and annulus for circulating.c. Cutting velocity

The velocity of cutting when circulating in annulus.

d. Critical mud velocity


3/6


7. Artikel tentang Fann VG

Method of increasing the rate of hydration of activated hydroxyethylcellulose compositions

US Patent Issued onAugust 11, 1987

Inventor(s)

Roy F. HouseLonnie D. Hoover

AssigneeNL Industries, Inc.

Application

No. 637971 filed on 1984-

08-06

Current US Class

507/216 , 507/114 , 507/925 ,

507/926 , 507/928

ExaminersPrimary: Richard D Lovering

Attorney, Agent or FirmBrowning, Bushman, Zamecki &

Anderson

Foreign Patent References

2000799 GB Jan., 1979
http://www.patentstorm.us/patents-by-date/1987/0811-1.htmlhttp://www.patentstorm.us/patents-by-date/1987/0811-1.htmlhttp://www.patentstorm.us/patents-by-date/1987/0811-1.htmlhttp://www.patentstorm.us/inventors/Roy_F__House-1012781.htmlhttp://www.patentstorm.us/inventors/Lonnie_D__Hoover-2374136.htmlhttp://www.patentstorm.us/assignees/NL_Industries,_Inc_-247413-1.htmlhttp://www.patentstorm.us/class/507/216-Hydroxyalkylcellulose_(e_g_,_HEC,_etc_).htmlhttp://www.patentstorm.us/class/507/114-Hydroxyalkylcellulose_(e_g_,_HEC,_etc_).htmlhttp://www.patentstorm.us/class/507/925-COMPLETION_OR_WORKOVER_FLUID.htmlhttp://www.patentstorm.us/class/507/926-PACKER_FLUID.htmlhttp://www.patentstorm.us/class/507/928-Spacing_slug_or_preflush_fluid.htmlhttp://www.patentstorm.us/examiners/Richard_D_Lovering-1348156.htmlhttp://www.patentstorm.us/attorneys/Browning,_Bushman,_Zamecki___Anderson-912-1.htmlhttp://www.patentstorm.us/attorneys/Browning,_Bushman,_Zamecki___Anderson-912-1.htmlhttp://www.patentstorm.us/inventors/Lonnie_D__Hoover-2374136.htmlhttp://www.patentstorm.us/assignees/NL_Industries,_Inc_-247413-1.htmlhttp://www.patentstorm.us/class/507/216-Hydroxyalkylcellulose_(e_g_,_HEC,_etc_).htmlhttp://www.patentstorm.us/class/507/114-Hydroxyalkylcellulose_(e_g_,_HEC,_etc_).htmlhttp://www.patentstorm.us/class/507/925-COMPLETION_OR_WORKOVER_FLUID.htmlhttp://www.patentstorm.us/class/507/926-PACKER_FLUID.htmlhttp://www.patentstorm.us/class/507/928-Spacing_slug_or_preflush_fluid.htmlhttp://www.patentstorm.us/examiners/Richard_D_Lovering-1348156.htmlhttp://www.patentstorm.us/attorneys/Browning,_Bushman,_Zamecki___Anderson-912-1.htmlhttp://www.patentstorm.us/attorneys/Browning,_Bushman,_Zamecki___Anderson-912-1.htmlhttp://www.patentstorm.us/patents-by-date/1987/0811-1.htmlhttp://www.patentstorm.us/inventors/Roy_F__House-1012781.html


4/6


Other polymers such as xanthan gum require elevated temperatures in even lower density

solutions. In many cases, as for example in workover operations, the equipment available

for preparing the well servicing fluids does not readily lend itself to high temperaturemixing. In well servicing operations where a solids-free well servicing fluid is desired,

such as certain completion operations, the fluid cannot be circulated in the hot borehole

to increase the temperature of the fluid.

SUMMARY OF THE INVENTION

It is an object of this invention to provide a new method of producing viscous heavy brine

well servicing fluids containing zinc bromide.A further object of this invention is to provide a method of increasing the rate of

hydration of polymeric viscosifiers/fluid loss additives in heavy brine well servicingfluids containing zinc bromide.

Another object of this invention is to provide a method of utilizing activated

hydroxyethyl cellulose compositions in viscosifying heavy brine well servicing fluids.The above and other objects of the present invention will become apparent to one skilled

in the art from the description given herein and the appended claims.

In accordance with the present invention, there is provided a method of producing a wellservicing fluid containing at least 16% by weight zinc bromide, preferably at least 18%,

and most preferably at least 20%, which comprises mixing together an activated

hydroxyethyl cellulose composition and a solution containing at least 30% zinc bromide,preferably at least 35%, and diluting the resulting viscous solution with a solution

containing a salt selected from the group consisting of calcium chloride, calcium

bromide, and mixtures thereof, to produce a viscous well servicing fluid having a density

in the range from about 14.2 ppg. to about 18.0 ppg.In another embodiment of this invention, there is provided a method of producing a well

servicing fluid containing at least 16% by weight zinc bromide, preferably at least 18%,

and most preferably 20%, which comprises mixing together an activated hydroxyethyl


5/6


dalam brine dimana HEC pada awalnya dicampur pada 30% dari massa total, atau lebih

besar dari 35%.


6/6


Kelompok Praktikum Bor Selasa 2

Data Fann VG Suatu Lumpur Sebagai Berikut

Documents

Transcript of Data Fann VG Suatu Lumpur Sebagai Berikut