CN205135465U - Weight on bit nipple joint can be regulated and control to nearly drill bit - Google Patents
Weight on bit nipple joint can be regulated and control to nearly drill bit Download PDFInfo
- Publication number
- CN205135465U CN205135465U CN201520994698.3U CN201520994698U CN205135465U CN 205135465 U CN205135465 U CN 205135465U CN 201520994698 U CN201520994698 U CN 201520994698U CN 205135465 U CN205135465 U CN 205135465U
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- China
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- mandrel
- spindle
- drill bit
- bit
- pressure
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Abstract
The utility model relates to a weight on bit nipple joint can be regulated and control to nearly drill bit belongs to oil gas exploitation well drilling downhole tool technical field. This weight on bit nipple joint includes the casing, goes up the mandrel, mandrel and attenuator down, is equipped with in the casing and sets one's heart the axle, and the lower extreme of going up the mandrel has a lower mandrel through sealing washer and attenuator slidable mounting, is provided with the mandrel chamber of stretching out and drawing back between the up end of lower mandrel and the last mandrel, be provided with the biasing component between the last mandrel of attenuator below and time mandrel. This weight on bit nipple joint can make down the mandrel keep slowing down its wearing and tearing at a balancing seat through the biasing power that the biasing component provided, has effectively improved well drilling efficiency and economic benefits. Have easy operation, good, the long service life of leakproofness, can extensively be arranged in drilling operation to effectively improve drill bit and downhole tool's the military service life -span.
Description
Technical field
The utility model relates to a kind of nearly drill bit controllable the pressure of the drill pipe nipple, belongs to oil-gas mining drilling well downhole tool technical field.
Background technology
In traditional oil-gas mining, the rotation of drill bit is driven by drill string rotating to carry out twist motion.Bit drilling process will bear the pressure of the drill that drill string applies.Drill bit bears the type of ability with drill bit of the pressure of the drill, drilling condition is relevant with stratum to be drilled.In the course of work, driller is by monitoring the pressure of the drill value usually, makes it remain under upper limit the pressure of the drill value, to improve drilling life of bit.If in drilling process, when the pressure of the drill value of drill bit is higher than preset upper limit value, drill bit will Rapid Damage at drilling process, and more bit change needs to make a trip, and reduces drilling well actual effect, increases labour intensity, and adds drilling cost.It can thus be appreciated that, in drilling process, drill bit is carried the pressure of the drill and control can improve drilling life of bit and drilling efficiency in preset upper limit value, can drilling cost be reduced again.Based on this, need R & D design one in drilling process, drill bit can be carried the pressure of the drill and control in preset upper limit value, thus improve drilling life of bit and drilling efficiency, and reduce the downhole tool of drilling cost.
Summary of the invention
The purpose of this utility model is: provide a kind of structure simple, practicality is good, effectively can realize the control of downhole weight on bit, thus improves drilling life of bit and drilling efficiency, and reduces nearly drill bit controllable the pressure of the drill pipe nipple of drilling cost.
The technical solution of the utility model is:
A kind of nearly drill bit controllable the pressure of the drill pipe nipple, comprise housing, upper spindle, lower spindle and damper, it is characterized in that: housing is built with upper spindle, and the lower end of upper spindle is slidably fitted with lower spindle by sealing ring and damper, is provided with axle telescopic cavity between the upper surface of lower spindle and upper spindle; Biasing element is provided with between upper spindle below damper and lower spindle; Described housing is provided with tapered runner, upper spindle is provided with centre bore; Centre bore is communicated with tapered runner, and lower spindle is provided with tap hole and overcurrent chamber, overcurrent chamber is communicated with by tap hole with between centre bore.
Described lower spindle upper end is interior dentation, is connected with upper spindle lower end, and its center forms toroidal cavity, for assembling biasing element and connection drill bit.
Described biasing element is spiral compression spring, butterfly spring or variable pitch spring.
The utility model beneficial effect is compared with prior art:
1), in drilling process, control axial driving force by the hydraulic pressure of monitoring drilling fluid, there is feature simple to operate, effectively can improve the application life of drill bit;
2) in the course of work, lower spindle stretches out vertically and compresses, and can effectively prevent from blocking the problem of not easily taking out;
3) by the bias force that biasing element provides, lower spindle can be made to remain on an equilbrium position, slow down its wearing and tearing, effectively improve drilling efficiency and economic benefit.
Accompanying drawing explanation
Fig. 1 is assembly structure schematic diagram of the present utility model;
Fig. 2 is utility model works view.
In figure, 1, housing, 2, upper spindle, 3, sealing ring, 4, damper, 5, biasing element, 6, lower spindle, 7, overcurrent chamber, 8, tap hole, 9, tapered runner, 10, centre bore, 11, axle telescopic cavity, 12, drill string, 13, drill bit.
Detailed description of the invention
This nearly drill bit controllable the pressure of the drill pipe nipple comprises housing 1, upper spindle 2, lower spindle 6 and damper 4.Housing 1 is built with upper spindle 2, and the lower end of upper spindle 2 is slidably fitted with lower spindle 6 by sealing ring 3 and damper 4, is provided with axle telescopic cavity 11 between the upper surface of lower spindle 6 and upper spindle 2.Lower spindle 6 upper end is interior dentation, is connected with upper spindle 2 lower end, and its center forms toroidal cavity, and the upper spindle 2 below damper 4 and the toroidal cavity between lower spindle 6 are for assembling biasing element 5 and connection drill bit 13.
Housing 1 is provided with tapered runner 9, upper spindle 1 is provided with centre bore 10; Centre bore 10 is communicated with tapered runner 9.
Lower spindle 6 is provided with tap hole 8 and overcurrent chamber 7, is communicated with by tap hole 8 between overcurrent chamber 7 with centre bore 10.
When this nearly drill bit controllable the pressure of the drill pipe nipple is installed, be arranged on drill string 12 by tapered runner 9 screw thread of housing 1 upper end, biasing element 5 upper end contacts with upper spindle 2, and lower spindle 6, under the effect of axial force, can stretch out along upper spindle 2 and compress.
During work, then drilling fluid arrives centre bore 10 through surface pump by drill string 12, and the direction along tap hole 8 finally arrives drill bit 13, to reach the Cooling and Lubricator effect to drill bit 13.
In drilling process, if driller uninstalls the pressure of the drill be applied on drill bit, lower spindle 6 can clash into the edge of upper spindle 2 because of the flip-flop of the pressure of the drill, and damper 4 is by the impact force of buffering lower spindle 6, avoids damaging upper spindle 2.Biasing element 5 contacts with the top edge of upper spindle 2.Biasing element 5 can be spiral compression spring, butterfly spring or variable pitch spring.Biasing element 5 has a constant bias force, when the pressure of the drill value is greater than the bias force of biasing element 5, lower spindle 6 will move to upper spindle 2, and by the pressure signal that the drilling fluid hydraulic pressure change monitored on ground produces, ground drilling workman judges whether the pressure of the drill value exceedes its preset upper limit value and change the pressure of the drill (see accompanying drawing 1).
When the upper sealing surface on upper spindle 2 and the lower sealing surface on lower spindle 6 contact completely, hydraulic seal can be formed; Show that the pressure of the drill value is greater than the bias force of biasing element 5.But now the upper sealing surface on upper spindle 2 and the lower sealing surface on lower spindle 6 are not formed and seal completely, and drilling fluid still can flow through and arrive drill bit 13 from the overcurrent chamber 7 of lower spindle 6.The effect of flowing hole 13 is exactly the pressure of drilling fluid excessive and destruction that is that cause inner body when preventing fluid-tight, and avoids drill bit 13 to cause damage (see accompanying drawing 2) because not having drilling fluid.
When upper sealing surface on upper spindle 2 and the lower sealing surface on lower spindle 6 contact and form fluid-tight, the hydraulic pressure of drilling fluid also increases thereupon, and the driller on ground according to the hydraulic pressure value of monitoring, can reduce the pressure of the drill.When the pressure of the drill value reduces, lower spindle 6 is subject to the bias force of bias component 5, and the upper sealing surface on upper spindle 2 separates with the lower sealing surface on lower spindle 6, and fluid-tight is removed, and drill bit normally works.
This nearly drill bit controllable the pressure of the drill pipe nipple is simple to operate, good airproof performance, long service life, can be widely used in drillng operation, effectively can improve the service life of drill bit and downhole tool.
Claims (3)
1. nearly drill bit controllable the pressure of the drill pipe nipple, comprise housing (1), upper spindle (2), lower spindle (6) and damper (4), it is characterized in that: housing (1) is built with upper spindle (2), the lower end of upper spindle (2) is slidably fitted with lower spindle (6) by sealing ring (3) and damper (4), is provided with axle telescopic cavity (11) between the upper surface of lower spindle (6) and upper spindle (2); Biasing element (5) is provided with between the upper spindle (2) of damper (4) below and lower spindle (6); Described housing (1) is provided with tapered runner (9), upper spindle (2) is provided with centre bore (10); Centre bore (10) is communicated with tapered runner (9), lower spindle (6) is provided with tap hole (8) and overcurrent chamber (7), is communicated with between overcurrent chamber (7) with centre bore (10) by tap hole (8).
2. one according to claim 1 nearly drill bit controllable the pressure of the drill pipe nipple, it is characterized in that: described lower spindle (6) upper end is interior dentation, be connected with upper spindle (2) lower end, its center forms toroidal cavity, for assembling biasing element (5) and connection drill bit (13).
3. one according to claim 1 nearly drill bit controllable the pressure of the drill pipe nipple, is characterized in that: described biasing element (5) is spiral compression spring, butterfly spring or variable pitch spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520994698.3U CN205135465U (en) | 2015-12-06 | 2015-12-06 | Weight on bit nipple joint can be regulated and control to nearly drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520994698.3U CN205135465U (en) | 2015-12-06 | 2015-12-06 | Weight on bit nipple joint can be regulated and control to nearly drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205135465U true CN205135465U (en) | 2016-04-06 |
Family
ID=55621270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520994698.3U Expired - Fee Related CN205135465U (en) | 2015-12-06 | 2015-12-06 | Weight on bit nipple joint can be regulated and control to nearly drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205135465U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350929A (en) * | 2015-12-06 | 2016-02-24 | 长江大学 | Adjustable bit pressure nipple of near bit |
| CN108798532A (en) * | 2018-05-31 | 2018-11-13 | 中国石油集团长城钻探工程有限公司 | A kind of underground pressure torsion poising tool |
-
2015
- 2015-12-06 CN CN201520994698.3U patent/CN205135465U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350929A (en) * | 2015-12-06 | 2016-02-24 | 长江大学 | Adjustable bit pressure nipple of near bit |
| CN105350929B (en) * | 2015-12-06 | 2018-09-18 | 长江大学 | A kind of controllable bit pressure pipe nipple of nearly drill bit |
| CN108798532A (en) * | 2018-05-31 | 2018-11-13 | 中国石油集团长城钻探工程有限公司 | A kind of underground pressure torsion poising tool |
| CN108798532B (en) * | 2018-05-31 | 2020-04-10 | 中国石油集团长城钻探工程有限公司 | Balance tool is turned round in pressure in pit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20171206 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |