закінчується у підземному пласті 5. Три первинних бічних стовбури б мають вихід у головний стовбур 2.ends in underground layer 5. Three primary side trunks b have an exit to the main trunk 2.
Вторинний бічний стовбур 7 має вихід у кожний з первинних бічних стовбурів б через отвір 8 у стінці розтягненого розтяжного стального хвостовика 9; на рисунку зображено тільки переріз його частини в зоні кожного з отворів 8.The secondary side trunk 7 has an exit to each of the primary side trunks b through the hole 8 in the wall of the stretched steel shank 9; the figure shows only a section of its part in the area of each of the holes 8.
Саме застосування розтягнених хвостовиків У дозволяє максимально збільшувати внутрішній діаметр таких хвостовиків 9. Таким чином, якщо діаметр необсадженого отвору кожного бокового стовбура становить близько 10 см, внутрішній діаметр розтягненого хвостовика може становити сім-вісім сантиметрів.It is the use of stretched U shanks that allows you to maximize the inner diameter of such shanks 9. Thus, if the diameter of the unlined hole of each side trunk is about 10 cm, the inner diameter of the stretched shank can be seven to eight centimeters.
Такий внутрішній діаметр є мінімально допустимим для спускання бурового інструменту у первинні бічні стовбури б, який можна застосовувати для буріння вторинних бічних стовбурів 7 достатньо великого діаметру, необхідного для перетікання достатніх кількостей вуглеводневих флюїдів через вторинні бічні стовбури 7 у первинні бічні стовбури.Such an internal diameter is the minimum allowable for lowering the drilling tool into the primary lateral trunks b, which can be used to drill the secondary lateral trunks 7 of a sufficiently large diameter necessary for the flow of sufficient amounts of hydrocarbon fluids through the secondary lateral trunks 7 into the primary lateral trunks.
Також в оптимальному варіанті головний стовбур 2 обсаджують за допомогою розтяжної стальної обсадної колони, котра в процесі розтягнення плакірує цей стовбур подібно тому, як це відбувається в результаті плакірування розтяжними хвостовиками 9 необсаджених отворів первинних бічних стовбурів 6.Also, in the optimal version, the main trunk 2 is sheathed with the help of an expanding steel casing column, which in the process of stretching clads this trunk in the same way as it happens as a result of cladding the unlined openings of the primary side trunks 6 with stretchable shanks 9.
Це дозволяє й надалі збільшувати внутрішній діаметр хвостовиків 9 та вторинних бічних стовбурів 7.This allows you to further increase the inner diameter of the shanks 9 and secondary side trunks 7.
Кожний з первинних та вторинних бічних стовбурів 6 та 7 забурений у пласти 10 з вмістом вуглеводневих флюїдів; такі пласти показано на рисунку у вигляді заштрихованих ділянок.Each of the primary and secondary lateral shafts 6 and 7 is drilled into layers 10 containing hydrocarbon fluids; such layers are shown in the figure as shaded areas.
Зрозуміло, що зображена система свердловини характеризується коренеподібною конфігурацією, котра забезпечує оптимальний режим відбирання вуглеводневих флюїдів із пластів 10 з вмістом вуглеводневих флюїдів.It is clear that the depicted well system is characterized by a root-like configuration, which provides an optimal mode of extraction of hydrocarbon fluids from formations 10 containing hydrocarbon fluids.
На фіг.2 показано вертикальний первинний стовбур 20, з якого у горизонтальному напрямку забурено первинний бічний стовбур 21.Fig. 2 shows the vertical primary trunk 20, from which the primary lateral trunk 21 is bored in the horizontal direction.
Первинний бічний стовбур 21 обсаджують розтяжним стальним хвостовиком 22. В оптимальному варіанті хвостовик 22 сформований спіралеподібними насосно-компресорними трубами, що їх застосовували під час буріння для подавання бурового розчину до бурового долота (не показано) та до забійного гідротурбінного двигуна (не показано), який використовують для обертання бурового долота.The primary side barrel 21 is lined with an expandable steel shank 22. In the optimal version, the shank 22 is formed by spiral pump-compressor pipes, which were used during drilling to supply drilling fluid to the drill bit (not shown) and to the hammerhead hydroturbine engine (not shown), which used to rotate the drill bit.
Після закінчення буріння спіралеподібні насосно-компресорні труби розтягуються у такий спосіб, що плакірують необсаджений стовбур і далі виконують функцію стальної обсадки первинного бічного стовбура 21.After the end of drilling, the spiral-shaped pump-compressor pipes are stretched in such a way that they cover the bare barrel and further perform the function of the steel lining of the primary side barrel 21.
Далі поблизу забою 24 первинного бічного стовбура 21 усередині хвостовика 22 встановлюють 4,5- дюймовий (близько 12 см) башмак 22А та пробку 23.Next, near the buttock 24 of the primary side barrel 21, a 4.5-inch (about 12 cm) shoe 22A and plug 23 are installed inside the shank 22.
Після цього усередині хвостовика 22 встановлюють та закріпляють відхилювач 25, а підвісний пристрій 27 з внутрішнім діаметром близько 7 см вставляють у розтягнений хвостовик 22, внутрішній діаметр якого становить близько 10 см. Далі через підвісний пристрій 27 подають буровий інструмент (не показано), котрий під дією відхилювача 25 висвердлює отвір 29 у хвостовику 22 і далі пробурює вторинний боковий стовбур ЗО у пласті 31 з вмістом вуглеводневих флюїдів.After that, the deflector 25 is installed and fixed inside the shank 22, and the suspension device 27 with an inner diameter of about 7 cm is inserted into the stretched shank 22, the inner diameter of which is about 10 cm. Next, a drilling tool (not shown) is fed through the suspension device 27, which under by the action of the deflector 25 drills the hole 29 in the shank 22 and further drills the secondary side barrel ZO in the reservoir 31 containing hydrocarbon fluids.
У наведеному прикладі у вторинний бічний стовбур 30 вставлено типовий стальний хвостовик З1А, зовнішній діаметр якого становить близько 7 см і який перфорують у зоні притоку за допомогою перфоратора (не показано).In the given example, a typical Z1A steel shank is inserted into the secondary side barrel 30, the outer diameter of which is about 7 cm and which is perforated in the inflow zone with a perforator (not shown).
Після пробурення першого вторинного бічного стовбура ЗО усередині розтягненого хвостовика 22 - поблизу устя спрямованого у латеральному напрямку первинного бічного стовбура 21 - встановлюють та закріпляють ще один відхилювач 32, після чого пробурюють ще один вторинний бічний стовбур 33, причому цей процес аналогічний описаному на прикладі першого вторинного бічного стовбура 30.After drilling the first secondary side trunk ZO inside the stretched shank 22 - near the mouth of the primary side trunk 21 directed in the lateral direction - another deflector 32 is installed and fixed, after which another secondary side trunk 33 is drilled, and this process is similar to that described on the example of the first secondary side trunk 30.
Після встановлення у другому вторинному бічному стовбурі стального хвостовика 34 - з метою забезпечення витоку вуглеводневого флюїду з першого вторинного бічного стовбура 30 та перетоку через первинний бічний стовбур 21 у головний стовбур 20 - або пробурюють отвір (не показано) крізь стінку хвостовика 34 та крізь відхилювач 34, або ж використовують вже існуючий прохід для рідини у відхилювачі або прохід для рідини у підвісному пристрої 35.After installation in the second secondary side barrel of the steel shank 34 - in order to ensure the leakage of the hydrocarbon fluid from the first secondary side barrel 30 and flow through the primary side barrel 21 into the main barrel 20 - or a hole is drilled (not shown) through the wall of the shank 34 and through the diverter 34 , or use the already existing passage for liquid in the deflector or passage for liquid in the suspension device 35.
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| Application Number | Priority Date | Filing Date | Title | 
|---|---|---|---|
| EP99300717 | 1999-02-01 | ||
| PCT/EP2000/000791WO2000046484A1 (en) | 1999-02-01 | 2000-02-01 | Method for creating secondary sidetracks in a well system | 
| Publication Number | Publication Date | 
|---|---|
| UA73296C2true UA73296C2 (en) | 2005-07-15 | 
| Application Number | Title | Priority Date | Filing Date | 
|---|---|---|---|
| UA2001086033AUA73296C2 (en) | 1999-02-01 | 2000-01-02 | Method for formation of secondary side stems in a well system and a well system | 
| Country | Link | 
|---|---|
| EP (1) | EP1149225B1 (en) | 
| CN (1) | CN1205403C (en) | 
| AR (1) | AR022692A1 (en) | 
| AT (1) | ATE264451T1 (en) | 
| AU (1) | AU764042B2 (en) | 
| BR (1) | BR0007696B1 (en) | 
| CA (1) | CA2357719C (en) | 
| CO (1) | CO5211015A1 (en) | 
| DE (1) | DE60009861T2 (en) | 
| DK (1) | DK1149225T3 (en) | 
| EA (1) | EA002465B1 (en) | 
| EG (1) | EG22061A (en) | 
| GC (1) | GC0000090A (en) | 
| ID (1) | ID29532A (en) | 
| MY (1) | MY121129A (en) | 
| NO (1) | NO331427B1 (en) | 
| NZ (1) | NZ512774A (en) | 
| OA (1) | OA11826A (en) | 
| TR (1) | TR200102201T2 (en) | 
| UA (1) | UA73296C2 (en) | 
| WO (1) | WO2000046484A1 (en) | 
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