CN2702043Y - Hole opening device for branch well casing - Google Patents
Hole opening device for branch well casing Download PDFInfo
- Publication number
- CN2702043Y CN2702043Y CN 200420004326 CN200420004326U CN2702043Y CN 2702043 Y CN2702043 Y CN 2702043Y CN 200420004326 CN200420004326 CN 200420004326 CN 200420004326 U CN200420004326 U CN 200420004326U CN 2702043 Y CN2702043 Y CN 2702043Y
- Authority
- CN
- China
- Prior art keywords
- tapping
- orientation
- limitator
- hole opening
- tie
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Earth Drilling (AREA)
Abstract
The utility model relates to a tapping device for oil gas branch well casing, comprising a tie-back device (3), an orientation limitator (4), an alignment screw (5), a tapping tool(7), etc. The tie-back device (3) is arranged on the upper part of a casing hanger and is delivered underground when the casing is lowered,. When tapping, the lower end of a drilling tubular column is connected with the orientation limitator (4) via a screw thread. The orientation limitator(4) is connected with the unidirectional alignment screw drill (5) and the tapping tool(7). As the tapping of the casing is aeolotropic, after the direction of the orientation key(1) of the tie-back device is known, when the orientation limitator (4) and the screw drill are connected, an angle is needed to be kept. The direction of the tapping of the casing is determined by the action of the tie-back device and the orientation limitator(4). Once tapping is completed, the top end of the orientation guiding rail of the limitator just drops on the key of the tie-back device, indicating that the tapping is completed.
Description
Technical field:
The utility model relates to the drilling well downhole tool, is specifically related to a kind of oil-gas branch well casing pipe hole opening device, belongs to International Classification of Patents E21B43/11 " exploitation-perforator in the well " technical field.
Background technology:
The Multilateral Wells technology is one can reduce the oil and gas development cost, improve the advanced technology of the rate of oil and gas recovery, but be a drilling technology that difficulty is very big, along with the high speed development of drilling technology, the utilization of branch hole drilling technology and raising place on the agenda.Though this technology is abroad arranged, and utilization is not popularized, and introduction expense costliness, tackling key problem research is being carried out in domestic indivedual oil fields, and complete set technology is also immature, also has certain technical barrier.
Summary of the invention:
The purpose of this utility model is to provide a kind of operation routinely that production string is sent into the down-hole, and the well cementation perforate is communicated with Multilateral Wells and Multilateral Wells casing pipe hole opening device that needn't preformed hole with old well.
The technical solution of the utility model is as follows.
Oil-gas branch well casing pipe hole opening device is divided into two parts: first is made up of tieback device (3), directional bond (1), links to each other with casing hanger by screw thread, when lower sleeve, sends into the down-hole.Second portion is made up of directed stop (4), helicoid hydraulic motor (5), drilling tool (7).The guide rail (2) of directed stop (4) has certain angular difference with the back-up block (6) of helicoid hydraulic motor, and this difference is to come as required to determine.When second portion instrument lower going-into-well following time, the guide rail (2) of directed stop (4) will be subjected to the restriction of directional bond (1), force drilling tool (7) to be affixed to one side of sleeve pipe.If during drilling fluid process helicoid hydraulic motor (5), drilling tool will rotate, and produce unidirectional cutting, in case perforate is finished, the guide rail of directed stop (2) top will just in time be dropped on the directional bond (1).
The guide rail (2) of directed stop (4) cooperates with the directional bond (1) of tieback device (3), not only can play the direction centralizing function, can also play the perforate position-limiting action.
Helicoid hydraulic motor (5) is provided with special back-up block (6), the side cutting during with the assurance perforate.
The novel advantage of this reality is: a series of challenges that 1, can avoid preformed hole to bring to cementing operation, even the scrapping of well.2, guarantee the cementing quality of cementing quality, particularly bifurcations.3, guarantee that Multilateral Wells implements acidifying, high pressure such as pressure break, well stimulation with the conventional gas and oil well is the same.
Description of drawings:
Figure is the structural representation of the utility model Multilateral Wells casing pipe hole opening device.
The specific embodiment:
As shown in the figure, this device by tieback device (3), directed stop (4), set upright screw rod (5) and drilling tool (7) and constitute.Tieback device (3) is cylindrical, and the lower end has screw thread to link to each other with hanger, and positioning key (1) is fixed on the tieback device (3).Directed stop (4) also is a pipe shape, and a guide-track groove (2) that mates with positioning key (1) is arranged from bottom to up, and the length of guide-track groove is relevant with perforate length, and perforate length is relevant with the hole angle of perforate section.When perforate was finished, the upper end of guide-track groove (2) and positioning key (1) were collided, and perforate is finished.
Guarantee that the perforate orientation is correct, must adjust the angular difference of guide-track groove (2) and helicoid hydraulic motor back-up block (6), make it equal design load.In case the orientation is got wrong, old well and Multilateral Wells will all be scrapped, and lose huge.Because casing pipe hole opening is directive, therefore, after the direction of knowing tieback device directional bond (1), directed stop (4) and helicoid hydraulic motor are when being connected, and angular difference of needs maintenance just is by the effect of tieback device and directed stop, the direction of casing pipe hole opening will be determined, in case perforate is finished, the directed guide rail top of stop is just in time dropped on the key of tieback device, and the expression perforate is finished.
After the well finishing drilling, when playing production string, tieback device (3) is connected with the cover hanger.During perforate, directed stop (4) is connected with helicoid hydraulic motor (5), must reach the angular difference that needs, and then drilling tool (7) is connected the bottom of helicoid hydraulic motor (5).After all instrument assemblings are finished, send into the down-hole, when directed stop (4) contact tieback device (3), automatically send deflection, make the directional bond (1) of tieback device (3) enter the guide rail (2) of directed stop (4), transfer to the precalculated position after, turn on pump, helicoid hydraulic motor (5) drives the drilling tool rotation, with casing pipe hole opening.When perforate was finished, the directional bond (1) of tieback device (3) just contacted the top of guide rail (2).The restriction drilling tool continues descending.
Claims (3)
1, a kind of oil-gas branch well casing pipe hole opening device, it is characterized in that: this device is divided into two parts: first is made up of tieback device (3) and directional bond (1), links to each other with casing hanger by screw thread; Second portion is made up of directed stop (4), helicoid hydraulic motor (5), drilling tool (7), and the guide rail (2) of directed stop (4) is provided with certain angular difference with the back-up block (6) of helicoid hydraulic motor.
2, oil-gas branch well casing pipe hole opening device according to claim 1 is characterized in that: the guide rail (2) of described directed stop (4) travel direction that matches with the directional bond (1) of tieback device (3) is set upright with perforate spacing.
3, according to the described oil-gas branch well casing pipe hole opening of claim 1 device, it is characterized in that: described helicoid hydraulic motor (5) is provided with back-up block (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420004326 CN2702043Y (en) | 2004-02-19 | 2004-02-19 | Hole opening device for branch well casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420004326 CN2702043Y (en) | 2004-02-19 | 2004-02-19 | Hole opening device for branch well casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2702043Y true CN2702043Y (en) | 2005-05-25 |
Family
ID=34767394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420004326 Expired - Lifetime CN2702043Y (en) | 2004-02-19 | 2004-02-19 | Hole opening device for branch well casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2702043Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852460A (en) * | 2012-08-31 | 2013-01-02 | 吉林大学 | Downhole deflecting device for drilling ice layer of polar region and downhole deflecting method |
-
2004
- 2004-02-19 CN CN 200420004326 patent/CN2702043Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852460A (en) * | 2012-08-31 | 2013-01-02 | 吉林大学 | Downhole deflecting device for drilling ice layer of polar region and downhole deflecting method |
| CN102852460B (en) * | 2012-08-31 | 2014-11-05 | 吉林大学 | Downhole deflecting device for drilling ice layer of polar region and downhole deflecting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BEIJING TELUOER DRILLING TECHNOLOGY SERVICE CO., L Free format text: FORMER NAME OR ADDRESS: BEIJING PETROLOR TECHNOLOGY DEVELOPMENT CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 100040 Beijing city Fengtai District Wu Village No. 3 B Beijing pat Rolle Technology Development Co. Ltd. Patentee after: Beijing Paiteluoer Drilling Technology Service Co.Ltd Address before: 100040 Beijing city Fengtai District Wu Village No. 3 B Beijing pat Rolle Technology Development Co. Ltd. Patentee before: Pateluoer Science & Technology Development Co., Ltd., Beijing |
|
| C56 | Change in the name or address of the patentee |
Owner name: BEIJING PETROLOR OILFIELD SERVICES CO., LTD. Free format text: FORMER NAME: BEIJING PETROLOR DRILLING TECHNOLOGY SERVICE CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 100070, Beijing, Fengtai District, 1 Spark Road, 9 floor, BCD Patentee after: Pat Rolle Beijing oilfield services company Address before: 100040 Beijing city Fengtai District Wu Village No. 3 B Beijing pat Rolle Technology Development Co. Ltd. Patentee before: Beijing Paiteluoer Drilling Technology Service Co.Ltd |
|
| CX01 | Expiry of patent term |
Expiration termination date: 20140219 Granted publication date: 20050525 |
|
| CX01 | Expiry of patent term |