Translation See on a Separate Sheet Later
Figure 1.
(translation see on a separate sheet later)
EKSWpurpose
EKSW(fig.1;photo3,4) ispurposedforestablishinghydraulicchannel (microdrift) betweenoil (gas) wellandproductivepoolbyboringan aperture (perforation) of 20 mm. diameter and up to 0,85m. length in casing and face area.
EKSWmay be applied at wells with 130 and 150 mm. casing internal diameter and up to 12 mm. side thickness.
EKSWapplicationadvantages
EKSW, unlikecumulativeperforation, allowspoolpenetrationwithoutcasingdeformationandcripplingtheconcreteisolationlayerbehind the casing.
EKSWallowsoilproductioninthewellwith minimum water concentration.
After pool penetration with EKSW there is no necessity in so-called “warming-up” the well to ensure more effective productivity.
EKSW, unlikecumulativeandhydraulicperforation, allowstopenetrateas well thin formations of about 0,4m. thickness in presence of ground waters, without risk of water intrusion.
After penetrating the pool with EKSW the debit of the well increases two to six times.
EKSWoperation
AfterslackingtheEKSWboreholetoolontheperforationpointitisfixedintheholewithgeared supports.
Thenboremoving-outfromconductorcaseis carried out, and the casing is perforated in the low speed spindle feed.
Furtherperforationofface area in the higher speed spindle feed is supplied by increasing boring log length with drilling tubes moving out from magazine carrying case (Fig. 1).
Afterperforationfinishingthegearedsupports are moved in, and so the borehole tool is unfixed for elevation.
Time of one hole drilling is no more than 45 minutes.
Examplesof 0,4 and 0,85 m. length side wells drilling are displayed in the Photos 1, 2.
Photo 1.
Photo 2.
Technical specifications of electric bore for kickoff of side well in productive oil (gas) pool (EKSW)
Electric bore specification / ParametersThree-phase power supply, V / 380 (+38;-57)
Consumed power at nominal voltage of 380 V,W, no more: / 2200
Electric bore work resource, hours, no less / 300
Timeofsidewellkickoff, min., nomore / 45
Number of microdrifts for one cycle. / 1
Side well kickoff depth, m / 0,4-0,85
Microdrift diameter, mm, no less / 20
Filtration area of one microdrift, sq.m / 0,025-0,056
Deviation of microdrift from chosen direction in the surface, exponent to well axis, m, no more / 0,2
Hydrostatic pressure, MPa, no more / 80
Temperatureinthewell, deg. Centigrade, no more / 90
Maximum dimensions of electric bore :
downhole device
- diameter, mm
- length, mm
surface control device, mm / 116
3500 440x480x475
Electricboreweight:
downholedevice, kg, no more surface device, kg, no more / 105
55
Servicelife, years, no less / 2
Photo 3. Photo 4.
Figure 1
EKSW construction
Logging cable (каротажныйкабель)
Perforator (Перфоратор)
Electronicblock (Блок электроники)
Casing (Обсадная колонна)
Electricsupply (электропривод)
Fixationnode (Узел фиксации)
Supply node (Узелподачи)
Conductor (Кондуктор)
Productivepool (Продуктивный пласт)
Bore (Бур)
Magazine carrying case (Кассетник)
Drilling tubes (Буровыетрубки) Magazine (Кассета)
Fixation node (Узел фиксации)
Constructorandmanufacturer: «Omskspecialinstrument construction bureau» OJSC
Address: 644041, Russia, Omsk, Kharkovskaya St., 2.
Phone: (3812) 46-54-55, 54-07-36, 54-09-60. Fax: (3812) 54-21-92
E-mail: