CN204571967U - Downhole drill bit thrust determinator - Google Patents
Downhole drill bit thrust determinator Download PDFInfo
- Publication number
- CN204571967U CN204571967U CN201520248996.8U CN201520248996U CN204571967U CN 204571967 U CN204571967 U CN 204571967U CN 201520248996 U CN201520248996 U CN 201520248996U CN 204571967 U CN204571967 U CN 204571967U
- Authority
- CN
- China
- Prior art keywords
- central tube
- urceolus
- drill bit
- cover
- rotation lock
- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of downhole drill bit thrust determinator, it is connected to and bores between plug tubing string and drill bit, and this determinator comprises the central tube with top connection and the urceolus with lower contact, and central tube is arranged in urceolus, and top connection leans out outside urceolus; Upper, middle and lower in urceolus cavity is respectively arranged with cover, piston and the anti-rotation lock ring for preventing central tube from rotating, and cover and outer tube inner wall screwed connection, is slidably connected with central tube; Piston and central tube also can be slided relative to outer tube inner wall by screwed connection; The confined space mineralization pressure oil cylinder that urceolus, central tube, cover and piston surround, at oil pressure cylinder built with hydraulic oil; Cover is provided with an electronic pressure gauge, for the in-oil cylinder oil pressure of gaging pressure.Downhole drill bit thrust assay device structures of the present utility model is simple, easy to operate, and the pressure difference before and after being pressurizeed by drill bit in oil pressure cylinder and the product of piston annulus area, can obtain the actual thrust at drill bit place.
Description
Technical field
The utility model relates to a kind of oil-gas field development downhole tool, especially relates to a kind of downhole drill bit thrust determinator.
Background technology
Brill bridging plug or cement plug are a kind of flow charts that underground work is commonly used, and the height boring plug efficiency has much relations with the pressure of the drill be added on drill bit.Prior art utilizes the load of well head, hole deviation data, discharge capacity, fluid density to estimate the thrust at drill bit place, because reality is bored in plug process, discharge capacity, fluid density are all changing, friction factor needs estimation, variations in temperature in pit shaft also affects estimated value, so the actual thrust at drill bit place and estimated value have certain error, when especially using continuous tubing drill plug, error is larger, gives analysis and improves brill plug efficiency and make troubles.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of bore in plug process can the thrust at Obtaining Accurate drill bit place, bores plug speed provide data with the relation of thrust, to improve the downhole drill bit thrust determinator boring and fill in efficiency for analyzing.
For this reason, the technical solution of the utility model is as follows:
A kind of downhole drill bit thrust determinator, it is connected to and bores between plug tubing string and drill bit, this down-hole thrust measures recorder and comprises the central tube with top connection and the urceolus with lower contact, described central tube is arranged in urceolus, described top connection leans out outside urceolus, and central tube and urceolus can along centerline direction relative slidings;
Upper, middle and lower in described urceolus cavity is respectively arranged with cover, piston and the anti-rotation lock ring for preventing described central tube from rotating, and described cover and outer tube inner wall screwed connection, is slidably connected with central tube; Described piston and central tube also can be slided relative to the inwall of urceolus by screwed connection;
The confined space mineralization pressure oil cylinder that described urceolus, central tube, cover and piston surround, at this oil pressure cylinder built with hydraulic oil;
Described cover is provided with a connecting hole, an electronic pressure gauge through this connecting hole and with cover screwed connection, for the in-oil cylinder oil pressure of gaging pressure.The cavity mineralization pressure meter room that urceolus top and cover surround, can protect electronic pressure gauge.The change of electronic pressure gauge energy real time record pressure, the pressure differential before and after being pressurizeed by drill bit in oil pressure cylinder and the product of piston annulus area, can obtain the actual thrust at drill bit place.
The inner peripheral surface of described anti-rotation lock ring is polygon or other is non-circular, the outer wall of described central tube is formed anti-rotation lock dog, the outer peripheral face of anti-rotation lock dog and the inner peripheral surface shape of anti-rotation lock ring adapt, and the axial length of anti-rotation lock dog is greater than the thickness of anti-rotation lock ring.
In addition, the outer peripheral face of described central tube lower port is also provided with anti-fall baffle ring.Described anti-fall baffle ring and central tube pass through screwed connection.
Described cover and between urceolus and central tube, described piston and all form sealing between urceolus and central tube.
Downhole drill bit thrust assay device structures of the present utility model is simple, easy to operate, and the pressure difference before and after being pressurizeed by drill bit in oil pressure cylinder and the product of piston annulus area, can obtain the actual thrust at drill bit place.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of downhole drill bit thrust determinator of the present utility model;
Fig. 2 be in Fig. 1 A-A to cross-sectional view.
In figure:
1. top connection, 2. urceolus, 3. cover, 4. oil pressure cylinder, 5. piston, 6. anti-rotation lock ring, 7. anti-rotation lock dog, 8. anti-fall baffle ring, 9. lower contact, 10. electronic pressure gauge, 11. central tubes, 12. pressure gauge rooms.
Detailed description of the invention
Be described in detail below in conjunction with the structure of the drawings and specific embodiments to downhole drill bit thrust determinator of the present utility model.
Downhole drill bit thrust determinator of the present utility model is connected to and bores between plug tubing string and drill bit.See Fig. 1 and Fig. 2, this downhole drill bit thrust determinator comprises the central tube 11 with top connection 1 and the urceolus 2 with lower contact 9, and central tube 11 is arranged in urceolus 2, and top connection 1 leans out outside urceolus 2.
Upper, middle and lower in urceolus 2 cavity is respectively arranged with cover 3, piston 5 and the anti-rotation lock ring 6 for preventing central tube 11 from rotating.Cover 3 is with urceolus 2 inwall screwed connection and form sealing, and cover 3 and central tube 11 are slidably connected.Piston 5 and central tube 11 are by screwed connection, and piston 5 can be free to slide relative to the inwall of urceolus 2.Piston 5 and be respectively arranged with O-ring seal between central tube 11 and urceolus 2.
The confined space mineralization pressure oil cylinder 4 that urceolus 2, central tube 11, cover 3 and piston 5 surround, at this oil pressure cylinder 4 built with hydraulic oil.Cover 3 is provided with a connecting hole, electronic pressure gauge 10 through this connecting hole and with cover 3 screwed connection.Electronic pressure gauge 10 can record the pressure in oil pressure cylinder 4, and the pressure differential before and after being pressurizeed by drill bit in oil pressure cylinder and the product of piston annulus area, can obtain the actual thrust at drill bit place.
The cavity mineralization pressure meter room 12 that urceolus top and cover surround, plays a protective role to electronic pressure gauge 10.
Specifically, the inner peripheral surface of anti-rotation lock ring 6 is polygon, is 6 limit shapes shown in Fig. 2.The inner peripheral surface of anti-rotation lock ring 6 can also be other non-circular shape.The outer wall of central tube 11 is formed anti-rotation lock dog 7, and the outer peripheral face of anti-rotation lock dog 7 and the inner peripheral surface shape of anti-rotation lock ring 6 adapt, and this structure can ensure that relative rotation does not occur for central tube and urceolus, has centralizing function to central tube simultaneously.In addition, because central tube 11 can slide relative to urceolus 2, so the axial length of anti-rotation lock dog 7 should be greater than the thickness of anti-rotation lock ring 6.
In addition, the outer peripheral face of central tube 11 lower port is also provided with anti-fall baffle ring 8, prevents drill bit accidental.Anti-fall baffle ring 8 passes through screwed connection with central tube 11.
Below the using method of determinator of the present utility model is described in detail:
This determinator is connected to bore plug tubing string and drill bit or bore to be filled between tubing string and screw drill.Top connection 1 bores plug tubing string by screwed connection top, and lower contact 9 passes through screwed connection with drill bit or screw drill.Drilling tool is in the process of going into the well, and the pressure in oil pressure cylinder 4 can constantly change, the pressure in electronic pressure gauge 10 real time record oil pressure cylinder 4.After drill bit puts in place, before starting to bore plug, allow drilling tools depth remain unchanged, wait for about 10 minutes, and writing time, as the initial point of pressure, then deepen drilling tool, conventionally start to bore plug.When boring the pressurization of plug tubing string, promote central tube 11 and move down, piston 5 moves down with central tube 11, the pressure drop now in oil pressure cylinder 4, and the pressure of the drill is larger, and the pressure in oil pressure cylinder 4 is less.In brill plug process, electronic pressure gauge can record the pressure in oil pressure cylinder 4 automatically.After boring plug, keep drilling tools depth constant, wait for more than 10 minutes, and writing time, trip out afterwards and bore plug tubing string.
Behind ground, pull down electronic pressure gauge 10, the data readback of pressure gauge storage out, according to the time of boring plug record, find to bore and fill in pressure process curve, utilize the product of pressure value and piston area to be converted into the actual thrust of boring plug.
Claims (4)
1. a downhole drill bit thrust determinator, it is connected to and bores between plug tubing string and drill bit, it is characterized in that, this down-hole thrust measures recorder and comprises the central tube (11) with top connection (1) and the urceolus (2) with lower contact (9), described central tube (11) is arranged in urceolus (2), described top connection (1) leans out urceolus (2) outward
Upper, middle and lower in described urceolus (2) cavity is respectively arranged with cover (3), piston (5) and the anti-rotation lock ring (6) for preventing described central tube (11) from rotating, and described cover (3) and urceolus (2) inwall screwed connection, is slidably connected with central tube (11); Described piston (5) also can be slided relative to the inwall of urceolus (2) by screwed connection with central tube (11);
The confined space mineralization pressure oil cylinder (4) that described urceolus (2), central tube (11), cover (3) and piston (5) surround, at this oil pressure cylinder (4) built with hydraulic oil;
Described cover (3) is provided with a connecting hole, an electronic pressure gauge (10) through this connecting hole and with cover (3) screwed connection, for the oil pressure in gaging pressure oil cylinder (4).
2. downhole drill bit thrust determinator according to claim 1, it is characterized in that: the inner peripheral surface of described anti-rotation lock ring (6) is polygon, the outer wall of described central tube (11) is formed anti-rotation lock dog (7), the outer peripheral face of anti-rotation lock dog (7) and the inner peripheral surface shape of anti-rotation lock ring (6) adapt, and the axial length of anti-rotation lock dog (7) is greater than the thickness of anti-rotation lock ring (6).
3. downhole drill bit thrust determinator according to claim 1, is characterized in that: the outer peripheral face of described central tube (11) lower port is also provided with anti-fall baffle ring (8).
4. downhole drill bit thrust determinator according to claim 3, is characterized in that: described anti-fall baffle ring (8) and central tube (11) pass through screwed connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520248996.8U CN204571967U (en) | 2015-04-22 | 2015-04-22 | Downhole drill bit thrust determinator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520248996.8U CN204571967U (en) | 2015-04-22 | 2015-04-22 | Downhole drill bit thrust determinator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204571967U true CN204571967U (en) | 2015-08-19 |
Family
ID=53864621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520248996.8U Withdrawn - After Issue CN204571967U (en) | 2015-04-22 | 2015-04-22 | Downhole drill bit thrust determinator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204571967U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790938A (en) * | 2015-04-22 | 2015-07-22 | 中国石油集团渤海钻探工程有限公司 | Downhole drill thrust measuring device |
-
2015
- 2015-04-22 CN CN201520248996.8U patent/CN204571967U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790938A (en) * | 2015-04-22 | 2015-07-22 | 中国石油集团渤海钻探工程有限公司 | Downhole drill thrust measuring device |
| CN104790938B (en) * | 2015-04-22 | 2018-05-29 | 中国石油集团渤海钻探工程有限公司 | Downhole drill bit thrust measurement device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150819 Effective date of abandoning: 20180529 |
|
| AV01 | Patent right actively abandoned |