CN203594377U - Coiled tubing gravity drilling tool - Google Patents
Coiled tubing gravity drilling tool Download PDFInfo
- Publication number
- CN203594377U CN203594377U CN201320806603.1U CN201320806603U CN203594377U CN 203594377 U CN203594377 U CN 203594377U CN 201320806603 U CN201320806603 U CN 201320806603U CN 203594377 U CN203594377 U CN 203594377U
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- CN
- China
- Prior art keywords
- coiled tubing
- hole
- drilling tool
- spiral
- steel ball
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- Expired - Fee Related
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Abstract
The utility model discloses a coiled tubing gravity drilling tool. The coiled tubing gravity drilling tool comprises a conical nut, a coiled tubing joint, a working barrel, a spiral transmission nut, a spiral shaft and a drill bit arranged at the lower end of the spiral shaft. The upper end of the coiled tubing joint is connected with coiled tubing and locked by the conical nut, a plurality of liquid drainage holes are formed in the outer wall of the working barrel in the circumferential direction, a through hole is formed in the outer wall of the spiral transmission nut, a tungsten steel ball is placed in the through hole and pressed against the inner side of the through hole through a plunger pin blocking the outer side of the through hole, the upper end of the spiral shaft is installed on a bearing cap through a bearing, a spring is clamped between the bearing cap and the coiled tubing joint, a spiral groove is formed in the outer wall of the spiral shaft, and the spiral shaft can make spiral rotation relative to the spiral transmission nut through relative sliding between the spiral groove and the tungsten steel ball. The coiled tubing gravity drilling tool is high in descaling and expanding efficiency, capable of being used for flushing a well cyclically and capable of solving the problems of scaling and necking down in oil, gas and water wells.
Description
Technical field
The utility model relates to a kind of continuous oil pipe operation instrument, especially a kind of coiled tubing gravity drilling tool.
Background technology
On tubing wall, in the course of time, will cause oil pipe necking down and obstruction; The blending agents such as the natural gas of gas well output, hydrogen sulfide, carbon dioxide, press under the ambient influnence of Gradient Descent at well temperature, well, sulphur will be from hydrogen sulfide condensation out, being attached to tube wall dwindles caliber and stops up well head or fall to shaft bottom; It is low that water injection well injects water quality, and incrustation scale, grease and other impurity adhere to the borehole wall and oil pipe reducing place, cause oil pipe necking down and obstruction.Coiled tubing carries out hole enlargement scale removal operation in flow string, and both environmental protection are safe, easy, quick again, and the annual integrated cost expenditure of adjusting is lower than routine work and routine work environmental protection after-cost expenditure.Therefore, in coiled tubing flow string, scale removal business starts each oil field at home and extensively carries out application.
But can only have waterpower helicoid hydraulic motor with the down-hole equipment of coiled tubing coordinating operation at present, and the hydraulic motors of waterpower helicoid hydraulic motor in oil pipe has been subject to diameter and coiled tubing and carries the impact of discharge capacity, motor torsional moment is low, creep into strength limited.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of coiled tubing gravity drilling tool, and it can, take the weight of the carrying capacity of coiled tubing well control device and oil pipe self as power, effectively solve the problem that continuous oil pipe operation is short of power.
In order to solve the problems of the technologies described above, the utility model comprises the tapered cup nut, coiled tubing joint, seating nipple and the worm drive nut that are threaded successively from top to bottom, is inserted in described seating nipple and stretches out the helical axis of setting downwards and can be arranged on removably the drill bit of end, described helical axis lower end, described coiled tubing upper end of joint is connected with coiled tubing and is locked by described tapered cup nut, described seating nipple outer wall week is upwards formed with multiple outages, on described worm drive nut outer wall, have a through hole, in this through hole, be placed with a wolfram steel ball, this wolfram steel ball is pressed on the inner side of through hole at the plunger pin in described through hole outside by shutoff, described helical axis upper end is by there being a bearing to be arranged on a bearing cover, in described seating nipple and between described bearing cover and coiled tubing joint, be installed with a spring, on described helical axis outer wall, be formed with a helical groove, the hemisphere that this helical groove can hold described wolfram steel ball slides therein, can make the relative worm drive nut of described helical axis helical rotation by described helical groove and wolfram steel ball relative sliding.
Described helical axis is connected by a drill bit converter thread seal with drill bit.
Described drill bit inner chamber middle part is formed with hole for water spraying.
Described coiled tubing joint comprises top connection and lower contact, and described top connection and lower contact are sealed connected together by shear pin.
The beneficial effects of the utility model are: the utility model scale removal hole enlargement efficiency is high, and well-flushing capable of circulation can solve oil, gas, the fouling of well inner oil tube, necking down situation.The utility model is with the carrying capacity of coiled tubing well control device and the weight of oil pipe self, reset with hydraulic pressure and spring force, utilize worm drive that the rectilinear motion of coiled tubing is become to rotatablely moving of gravity drilling tool, effectively solve the problem being short of power, in the process of hole enlargement, clean by coiled tubing water filling, improve stability and efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model coiled tubing gravity drilling tool;
Fig. 2 is that the A-A of Fig. 1 is to dissecing structural representation;
Fig. 3 is the local enlarged diagram that wolfram steel ball place is installed on worm drive nut in Fig. 2.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Referring to Fig. 1 to Fig. 3, coiled tubing gravity drilling tool of the present utility model comprises the tapered cup nut 1, coiled tubing joint 2, seating nipple 6 and the worm drive nut 7 that are threaded successively from top to bottom, is inserted in described seating nipple 6 and stretches out the helical axis 8 of setting downwards and can be arranged on removably the drill bit 10 of described helical axis 8 ends, lower end.Described drill bit 10 inner chamber middle parts are formed with hole for water spraying 14, and the design of hole for water spraying 14 makes coiled tubing gravity drilling tool in creeping into, can allow coiled tubing inner high voltage flushing fluid by carrying out sand-flushing, until by complete clearly to borehole wall dirt and attachment.
Described coiled tubing joint 2 upper ends are connected with coiled tubing and are locked by described tapered cup nut 1.Described coiled tubing joint 2 comprises top connection 21 and lower contact 22, and described top connection 21 and lower contact 22 are sealed connected together by shear pin.The structure design of coiled tubing joint 2 is in the upper process of carrying coiled tubing gravity drilling tool, if run into jam, can press by spraining and cut off shear pin and realize coiled tubing and separate with giving up of gravity drilling tool.
Described 6 outer wall weeks of seating nipple are upwards formed with multiple outages 12, and the design of outage 12 is that the pressure in order to make seating nipple 6 inner chambers keeps balance with the pressure outside cylinder.
On described worm drive nut 7 outer walls, have a through hole 16, be placed with a wolfram steel ball 11 in this through hole 16, this wolfram steel ball 11 is pressed on the inner side of through hole 16 at the plunger pin 15 in described through hole 16 outsides by shutoff.As shown in Figure 3, a hemisphere of wolfram steel ball 11 is in through hole 16 inner sides, and second half spheroid is in helical groove 13.
Described helical axis 8 upper ends are by there being a bearing to be arranged on a bearing cover 4, in described seating nipple 6 and between described bearing cover 4 and coiled tubing joint 2, be installed with a spring 3, on described helical axis 8 outer walls, be formed with a helical groove 13, the hemisphere that this helical groove 13 can hold described wolfram steel ball 11 slides therein, can make relative worm drive nut 7 helical rotation of described helical axis 8 by described helical groove 13 and wolfram steel ball 11 relative slidings.
Described helical axis 8 is connected by drill bit converter 9 thread seals with drill bit 10.The design of drill bit converter 9 makes the replacing of drill bit 10 more convenient.
In work progress, coiled tubing is passed to Blowout prevention wellhead and lubricator, insert coiled tubing joint 2 and also tightened by tapered cup nut 1, then, by device entirety income lubricator, afterwards lubricator and Blowout prevention wellhead are connected with production wellhead, drive a well.Slowly by gravity drilling tool G.I.H, when meeting obstructions, drill bit in well 10 halts, and more than 6 part of seating nipple is still subject to the downward gravity effect of coiled tubing, and convert motion downward coiled tubing to helical rotation by helical axis 8 and worm drive nut 7, drive drill bit 10 to rotate scraping and creep into.After a stroke completes, above propose for the second time pressurization downwards and crept into, crept into coiled tubing inner high voltage flushing fluid sand-flushing simultaneously, until by complete clearly to borehole wall dirt and attachment, go round and begin again until complete.
In sum, content of the present utility model is not limited in the above-described embodiment, and those skilled in the art can propose other embodiment within technological guidance's thought of the present utility model, but within these embodiment are included in scope of the present utility model.
Claims (4)
1. a coiled tubing gravity drilling tool, it is characterized in that: comprise from top to bottom thread seal connects successively tapered cup nut (1), coiled tubing joint (2), seating nipple (6) and worm drive nut (7), be inserted in described seating nipple (6) and stretch out the helical axis (8) of setting downwards and can be arranged on removably the drill bit (10) of described helical axis (8) end, lower end; described coiled tubing joint (2) upper end is connected with coiled tubing and is locked by described tapered cup nut (1), described seating nipple (6) outer wall week is upwards formed with multiple outages (12), on described worm drive nut (7) outer wall, have a through hole (16), in this through hole (16), be placed with a wolfram steel ball (11), this wolfram steel ball (11) is pressed on the inner side of through hole (16) at the plunger pin (15) in described through hole (16) outside by shutoff, described helical axis (8) upper end is by there being a bearing to be arranged on a bearing cover (4), be positioned at described seating nipple (6) and be installed with a spring (3) between described bearing cover (4) and coiled tubing joint (2), on described helical axis (8) outer wall, be formed with a helical groove (13), the hemisphere that this helical groove (13) can hold described wolfram steel ball (11) slides therein, can make the relative worm drive nut of described helical axis (8) (7) helical rotation by described helical groove (13) with wolfram steel ball (11) relative sliding.
2. according to coiled tubing gravity drilling tool claimed in claim 1, it is characterized in that: described helical axis (8) is connected by drill bit converter (9) thread seal with drill bit (10).
3. according to coiled tubing gravity drilling tool claimed in claim 1, it is characterized in that: described drill bit (10) inner chamber middle part is formed with hole for water spraying (14).
4. according to coiled tubing gravity drilling tool claimed in claim 1, it is characterized in that: described coiled tubing joint (2) comprises top connection (21) and lower contact (22), described top connection (21) and lower contact (22) are sealed connected together by shear pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320806603.1U CN203594377U (en) | 2013-12-08 | 2013-12-08 | Coiled tubing gravity drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320806603.1U CN203594377U (en) | 2013-12-08 | 2013-12-08 | Coiled tubing gravity drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203594377U true CN203594377U (en) | 2014-05-14 |
Family
ID=50675272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320806603.1U Expired - Fee Related CN203594377U (en) | 2013-12-08 | 2013-12-08 | Coiled tubing gravity drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203594377U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939318A (en) * | 2017-11-30 | 2018-04-20 | 中国石油大学(北京) | Local under balance pressure drilling reflux |
-
2013
- 2013-12-08 CN CN201320806603.1U patent/CN203594377U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939318A (en) * | 2017-11-30 | 2018-04-20 | 中国石油大学(北京) | Local under balance pressure drilling reflux |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140514 Termination date: 20161208 |