CN203420634U - Drilling tool capable of reducing combining exterior angle difference measurement error of directional drilling tool - Google Patents
Drilling tool capable of reducing combining exterior angle difference measurement error of directional drilling tool Download PDFInfo
- Publication number
- CN203420634U CN203420634U CN201320364262.7U CN201320364262U CN203420634U CN 203420634 U CN203420634 U CN 203420634U CN 201320364262 U CN201320364262 U CN 201320364262U CN 203420634 U CN203420634 U CN 203420634U
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- CN
- China
- Prior art keywords
- drill collar
- drilling tool
- screw rod
- directional
- non magnetic
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- 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- Withdrawn - After Issue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 drilling tool capable of reducing a combining exterior angle difference measurement error of a directional drilling tool. The drilling tool comprises an MWD short joint (1), a nonmagnetic drill collar (2) and a bent screw rod (3), wherein the MWD short joint (1), the nonmagnetic drill collar (2) and the bent screw rod (3) are sequentially connected, the upper end of the MWD short joint (1) is provided with a directional key (4), and the outer wall of the end, connected with the bent screw rod (3), of the nonmagnetic drill collar (2) is provided with a directional groove (5). The drilling tool has the advantages that the included angle theta 1 between the directional key of the MWD short joint and the directional groove in the nonmagnetic drill collar can be measured on the ground conveniently and accurately, and after the nonmagnetic drill collar and the bent screw rod are connected on a drill floor, the angle difference theta 2 between the directional groove in the nonmagnetic drill collar and the high edge of the bent screw rod is measured, so that the combining exterior angle difference measurement error of the directional drilling tool can be effectively reduced, improvement of construction precision in the construction process of a directional well is facilitated, and a more ideal borehole track is obtained.
Description
Technical field
The utility model relates to directed drilling tool angular measurement technical field, particularly a kind of drilling tool that reduces directed drilling assembly exterior angle difference measurements error.
Background technology
In drilling process, in order can according to predetermined orientation and hole deviation is high-precision to creep into, just need the accurate tool-face angular difference of measuring directional orientation tool.Directed drilling assembly adopts curved screw rod conventionally, curved screw rod has curved point, it is flash tool-face, it and MWD(measurement while drilling) there is differential seat angle (outer angular difference) between pipe nipple directional bond, between directional bond and inserting tube tool-face, also there is certain angular difference (interior angular difference), by these two differential seat angles, can calculate the angular difference of flash tool-face and inserting tube tool-face.
When the angular difference of measuring between curved screw rod flash and MWD pipe nipple directional bond, conventional method need to project to MWD pipe nipple directional bond and curved screw rod marker line in a plane and measure.The tool-face angular difference obtaining by this measuring method is consistent with real angular difference, so just can obtain desirable well track.The survey tool of using in prior art is in the plane after projection, due to various operational reasons, whether parallelly with non magnetic drill collar axis direction be difficult to identification projection, and non magnetic drill collar length is about 10 meters, slight error likely reaches a higher value after amplifying, so measure error is larger.
Utility model content
The purpose of this utility model is to overcome the shortcoming of prior art, provide a kind of and measure conveniently, accurately, reduce the drilling tool of directed drilling assembly exterior angle difference measurements error.
The purpose of this utility model is achieved through the following technical solutions: a kind of drilling tool that reduces directed drilling assembly exterior angle difference measurements error, it comprises MWD pipe nipple, non magnetic drill collar and the curved screw rod connecting successively, the upper end of MWD pipe nipple is provided with directional bond, and the outer wall of one end of non magnetic drill collar connecting bending screw rod arranges a guide slot.
Described guide slot width is 1.0～1.5cm, and guide slot axial length is 6～9cm.
Described guide slot equates with directional bond on the MWD pipe nipple distance apart from top apart from the distance of the outer wall end of one end of non magnetic drill collar connecting bending screw rod.
Non magnetic drill collar be fixedly connected with curved screw rod mode for MWD pipe nipple and non magnetic drill collar are assembled or by MWD pipe nipple and non magnetic drill collar by the direct integrated production of hot investment casting mode
The utlity model has following advantage: the utility model is by processing a guide slot that is similar to directional bond in non magnetic drill collar bottom, on ground, carry out as requested the integrated assembling of MWD pipe nipple and non magnetic drill collar or carry out the integrated of MWD pipe nipple and non magnetic drill collar by hot investment casting, the MWD pipe nipple directional bond after integrated and the angle theta between the guide slot on non magnetic drill collar
1can be convenient on ground, accurately measure, after non magnetic drill collar is connected on rig floor with curved screw rod, then measure the angular difference θ of guide slot and curved screw rod flash on non magnetic drill collar
2through this method, can effectively reduce the error of directed drilling assembly exterior angle difference measurements, be conducive to improve the precision of constructing in directional well work progress, obtain more preferably well track, be also conducive to avoid the appearance of the complex situations such as cutting ferrule pipe in bit freezing and setting of casing process in drilling process.
Guide slot in the processing of non magnetic drill collar bottom can not fallen by erosion under HTHP, and reliability is high; After being fixedly connected with of MWD pipe nipple and non magnetic drill collar, measure angle theta
1thereby reduce MWD pipe nipple directional bond in the vertical apart from the position of plane of projection, even if there is certain angle in the position of two directional bonds longitudinally, also can be easily, measure accurately, can effectively reduce the error that has personnel to operate to cause, thereby play the effect of the measure error that reduces outer angular difference.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model
Fig. 2 is the structural representation of MWD pipe nipple of the present utility model
Fig. 3 is the structural representation of non magnetic drill collar of the present utility model
Fig. 4 is the syndeton schematic diagram of MWD pipe nipple of the present utility model and non magnetic drill collar
Fig. 5 is drilling assembly of the present utility model exterior angle difference measurements principle schematic
In figure, 1-MWD pipe nipple, 2-non magnetic drill collar, the curved screw rod of 3-, 4-directional bond, 5-guide slot.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described, protection domain of the present utility model is not limited to the following stated:
As Fig. 1, Fig. 2, Fig. 3, shown in Fig. 4, a kind of drilling tool that reduces directed drilling assembly exterior angle difference measurements error, it comprises the MWD pipe nipple 1 connecting successively, non magnetic drill collar 2 and curved screw rod 3, the upper end of MWD pipe nipple 1 is provided with directional bond 4, the outer wall of one end of non magnetic drill collar 2 connecting bending screw rods 3 arranges a guide slot 5, described guide slot 5 width are 1.0～1.5cm, guide slot 5 axial lengths are 6～9cm, guide slot 5 equates with directional bond 4 on MWD pipe nipple 1 distance apart from top apart from the distance of the outer wall end of one end of non magnetic drill collar 2 connecting bending screw rods 3, this structure can guarantee that the intensity of this non magnetic drill collar 2 is unaffected, avoid non magnetic drill collar 2 to damage, under HTHP, E position stress concentration effect is obvious, and guide slot 5 is too near apart from the distance of the outer wall end of one end of non magnetic drill collar 2 connecting bending screw rods 3, can reduce non magnetic drill collar intensity, apart from too far away, certainty of measurement can reduce.E point was the intersection point of the outer wall lower end of the C vertical line of ordering and non magnetic drill collar 2.
Non magnetic drill collar 2 be fixedly connected with curved screw rod 3 mode for by MWD pipe nipple 1 and non magnetic drill collar 2 assemblings or by MWD pipe nipple 1 with non magnetic drill collar 2 by the direct integrated production of hot investment casting mode.
First, after the MWD pipe nipple 1 and non magnetic drill collar 2 being fixedly connected with, measure the directional bond 4 of MWD pipe nipple 1 and the angle theta between the guide slot 5 of non magnetic drill collar 2
1, as shown in Figure 4, A is the upper extreme point of the directional bond 4 of MWD pipe nipple 1, and B is the upper extreme point of the guide slot 5 of non magnetic drill collar 2, and in the MWD pipe nipple 1 being fixedly connected with by measurement and the upright projection of non magnetic drill collar 2, between AB, clockwise arc length is
shown in Fig. 5, just can pass through formula
obtain θ
1value, wherein r is non magnetic drill collar 2 external diameters;
Then, curved screw rod 3 is connected with non magnetic drill collar 2, measures the angle theta of guide slot 5 with the flash of curved screw rod 3 of non magnetic drill collar 2
2, as shown in Figure 1, C is the lower extreme point of the guide slot 5 of non magnetic drill collar 2, and E point was the intersection point of the outer wall lower end of the C vertical line of ordering and non magnetic drill collar 2, and D is the upper extreme point of the flash mark line of curved screw rod 3, by measuring D between CD, to the arc length of C direction, is
shown in Fig. 5, just can pass through formula
obtain θ
2value, wherein r is non magnetic drill collar 2 external diameters;
The outer angular difference θ=θ between the flash of curved screw rod 3 and the directional bond 4 of MWD pipe nipple 1
1± θ
2, when arc AB is consistent with arc CD direction, be "+", during opposite direction, be "-".
Claims (3)
1. a drilling tool that reduces directed drilling assembly exterior angle difference measurements error, it is characterized in that: it comprises MWD pipe nipple (1), non magnetic drill collar (2) and the curved screw rod (3) connecting successively, the upper end of MWD pipe nipple (1) is provided with directional bond (4), and the outer wall of one end of non magnetic drill collar (2) connecting bending screw rod (3) arranges a guide slot (5).
2. a kind of drilling tool that reduces directed drilling assembly exterior angle difference measurements error according to claim 1, is characterized in that: described guide slot (5) width is 1.0～1.5cm, and guide slot (5) axial length is 6～9cm.
3. a kind of drilling tool that reduces directed drilling assembly exterior angle difference measurements error according to claim 1, is characterized in that: described guide slot (5) equates with directional bond (4) on MWD pipe nipple (1) distance apart from top apart from the distance of the outer wall end of one end of non magnetic drill collar (2) connecting bending screw rod (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320364262.7U CN203420634U (en) | 2013-06-25 | 2013-06-25 | Drilling tool capable of reducing combining exterior angle difference measurement error of directional drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320364262.7U CN203420634U (en) | 2013-06-25 | 2013-06-25 | Drilling tool capable of reducing combining exterior angle difference measurement error of directional drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203420634U true CN203420634U (en) | 2014-02-05 |
Family
ID=50019733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320364262.7U Withdrawn - After Issue CN203420634U (en) | 2013-06-25 | 2013-06-25 | Drilling tool capable of reducing combining exterior angle difference measurement error of directional drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203420634U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343665A (en) * | 2013-06-25 | 2013-10-09 | 西南石油大学 | Method for reducing exterior angle deviation measuring errors of directional drilling assembly and drilling tool |
| CN108827126A (en) * | 2018-06-19 | 2018-11-16 | 华北有色工程勘察院有限公司 | A kind of dress conjunction difference measuring tool |
-
2013
- 2013-06-25 CN CN201320364262.7U patent/CN203420634U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343665A (en) * | 2013-06-25 | 2013-10-09 | 西南石油大学 | Method for reducing exterior angle deviation measuring errors of directional drilling assembly and drilling tool |
| CN103343665B (en) * | 2013-06-25 | 2015-03-04 | 西南石油大学 | Method for reducing exterior angle deviation measuring errors of directional drilling assembly and drilling tool |
| CN108827126A (en) * | 2018-06-19 | 2018-11-16 | 华北有色工程勘察院有限公司 | A kind of dress conjunction difference measuring tool |
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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: 20140205 Effective date of abandoning: 20150304 |
|
| RGAV | Abandon patent right to avoid regrant |