SU580304A1 - Method of lowering a drilling tool to borehole face and lifting same at jet-turbine drilling - Google Patents
Method of lowering a drilling tool to borehole face and lifting same at jet-turbine drillingInfo
- Publication number
- SU580304A1 SU580304A1 SU7502176332A SU2176332A SU580304A1 SU 580304 A1 SU580304 A1 SU 580304A1 SU 7502176332 A SU7502176332 A SU 7502176332A SU 2176332 A SU2176332 A SU 2176332A SU 580304 A1 SU580304 A1 SU 580304A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- drilling
- lowering
- jet
- turbine
- drilling tool
- Prior art date
Links
Landscapes
- Earth Drilling (AREA)
Description
в тс на максимально равном рассто нии от оси бура.in hardware at the maximum equal distance from the drill axis.
В таком положении бур свободно спзскаетс через обсадную колонну к забою скважины .In this position, the drill is freely driven through the casing to the bottom of the well.
Извлечение из скважины бура, после окончани цикла долблени , производитс следующим образом.Removing the drill from the well, after the end of the slotting cycle, is performed as follows.
Бур приподнимаетс до соприкосновени долот с башмаком обсадной колонны 4, при этом бур поворачиваетс принудительно вокруг своей оси. В результате контакта корпусов или шарошек долот с торцом башмака , под действием отклон ющей силы долото будет поворачиватьс пока шарошки не займут транспортное положение и свободно не войдут во внутреннюю полость обсадной колонны . При этом поворот бура совмещаетс с небольшим подъемом (нат жкой) буровой колонны, необходимым дл определени момента входа бура в колонну.The drill is raised until the bit touches the casing shoe 4, and the drill is rotated forcibly around its axis. As a result of the contact of the bodies or bit cutters with the end of the shoe, under the action of the deflecting force, the bit turns until the cutters take the transport position and freely enter the casing internal cavity. In this case, the rotation of the drill is combined with a slight lift (tension) of the drill string, which is necessary for determining the moment of entry of the drill into the column.
Дл облегчени установки долот в транспортное положение на забое скважины можно торец башмака обсадной колонны срезать под углом равным 10-15° к диаметральному сеченню трубы. Такой скос башмака обсадной колонны выполн етс перед спуском ее в скважину. Он обеспечивает более надежный поворот долот в транспортное положение .To facilitate the installation of bits in the transport position at the bottom of the borehole, the end of the casing shoe can be cut off at an angle of 10-15 ° to the diametrical section of the pipe. Such a casing shoe bevel is performed prior to lowering it into the well. It provides a more reliable rotation of the bits in the transport position.
Применение предлагаемого способа спуска может осуществл тьс с долотами, имеющими две и больще шарошек, но целесообразно примен ть двухшарошечные долота.The application of the proposed method of descent can be carried out with bits that have two or more cones, but it is advisable to use double-cone bits.
Четырехщарошечные долота могут быть применены iC меньшим эффектом, чем двухшарошечные , так как эти долота, будут образовывать меньший зазор между обсадной трубой и стенкой скважины.Four-piece bits can be used with iC less effect than two-barrel bits, since these bits will form a smaller gap between the casing and the borehole wall.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU7502176332A SU580304A1 (en) | 1975-10-01 | 1975-10-01 | Method of lowering a drilling tool to borehole face and lifting same at jet-turbine drilling |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU7502176332A SU580304A1 (en) | 1975-10-01 | 1975-10-01 | Method of lowering a drilling tool to borehole face and lifting same at jet-turbine drilling |
Publications (1)
Publication Number | Publication Date |
---|---|
SU580304A1 true SU580304A1 (en) | 1977-11-15 |
Family
ID=20633037
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU7502176332A SU580304A1 (en) | 1975-10-01 | 1975-10-01 | Method of lowering a drilling tool to borehole face and lifting same at jet-turbine drilling |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU580304A1 (en) |
-
1975
- 1975-10-01 SU SU7502176332A patent/SU580304A1/en active
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