CN106121574A - A kind of gas drilling centering instrument - Google Patents
A kind of gas drilling centering instrument Download PDFInfo
- Publication number
- CN106121574A CN106121574A CN201610681745.8A CN201610681745A CN106121574A CN 106121574 A CN106121574 A CN 106121574A CN 201610681745 A CN201610681745 A CN 201610681745A CN 106121574 A CN106121574 A CN 106121574A
- Authority
- CN
- China
- Prior art keywords
- gas
- core
- coring
- threaded
- bit
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
Abstract
The invention discloses a kind of gas drilling centering instrument, including safety joint, rotation assembly, difference pipe nipple, gas distribution joint, urceolus of coring, coring inner drum, core grabber molectron, drill bit throat packing device and gas core bit, being connected with difference short-section thread in the middle part of described safety joint, threadeds with rotation assembly in bottom；Described rotation assembly bottom is connected with gas distribution joint screw thread；Threaded with coring inner drum in described gas distribution joint bottom；Threaded with core grabber molectron in described coring inner drum bottom；Threaded with urceolus of coring in described difference pipe nipple bottom；Threaded with gas core bit in described urceolus bottom of coring；Described drill bit throat packing device is placed between gas core bit and core grabber molectron.Present invention, avoiding gases at high pressure directly to contact with rock core, rock core is caused erosion, affect coring operation success rate；Thus improve the gas drilling centering average yield rate of operation rock core.
Description
Technical field
The present invention relates to gas drilling field, be specifically related to a kind of gas drilling centering instrument.
Background technology
Carrying out coring operation in the case of gas drilling, owing to there is negative pressure in well, the stratum that shaft bottom exposes is born
Stress hugely, along with core bit constantly creeps into, the rock core exposed is managed or at the growth of gap from layer under crustal stress effect
Split and discharge pressure, forming flake rock core, add that gas-pressurized is in coring tool inner/outer tube annular space and core bit throat
Flow at high speed, wash away rock core, make coring tool produce jump pendulum power, easily cause the card heart, mill the heart；Cut after the heart in trip-out process simultaneously
Flake core column can lean against on inner tube wall the pressure that core grabber applies without enough weight again and keeps enough, makes core grabber pine
Move and cause falling the heart, so it is extremely low to use normal core-extracting tool to carry out the gas drilling centering average yield rate of operation rock core, for
Geological prospecting adversely affects.Therefore, in the urgent need to researching and developing a kind of coring tool being adapted to gas drilling, with satisfied scene
Demand.
Summary of the invention
For solving the problems referred to above, the invention provides a kind of gas drilling centering instrument.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of gas drilling centering instrument, including safety joint, rotation assembly, difference pipe nipple, gas distribution joint, cores
Urceolus, coring inner drum, core grabber molectron, drill bit throat packing device and gas core bit, in the middle part of described safety joint with
Difference short-section thread connects, and threadeds with rotation assembly in bottom；Described rotation assembly bottom is with gas distribution joint screw thread even
Connect；Threaded with coring inner drum in described gas distribution joint bottom；Described coring inner drum bottom and core grabber molectron screw thread
Connect；Threaded with urceolus of coring in described difference pipe nipple bottom；Described urceolus bottom of coring connects with gas core bit screw thread
Connect；Described drill bit throat packing device is placed between gas core bit and core grabber molectron, is used for sealing gas column drill
Annular space between head and core grabber molectron.
Preferably, described rotation assembly includes bearing box, bearing, pressure cap and brake hoop, and the mandrel in bearing box is arranged
Having semi-ring, semi-ring is axially provided with the back-up ring of stationary half, semi-ring and retainer ring spacing are passed through in the side of bearing, and opposite side passes through
The end of bearing box is spacing, and pressure cap is threaded connection with mandrel, and brake hoop is placed in mandrel, and brake hoop bossing is placed in the heart
Axle inside grooves, logical regulation pressure cap and the position of brake hoop, can carry out spacing to inner core regulating nut, inner core regulating nut with
Spindle thread connects.
Preferably, described gas distribution joint includes shunting valve seat and distributary base, and shunting valve seat is threadeded with distributary base.
Preferably, described core grabber molectron includes adapter sleeve, guides clip seat and guide clip, adapter sleeve and guide card
Hoop seat is threaded, guides clip and is arranged on inside guiding clip seat, and guiding clip can in guiding clip seat slidably.
Preferably, drill bit throat packing device includes guiding the ring being provided with at the sealing of clip seat front end and bit inner surface
Shape sealed groove and " o " RunddichtringO, " o " RunddichtringO is placed in inside sealed groove, and " o " RunddichtringO is sealed in table in drill bit
On face, so that gases at high pressure cannot be introduced into drill bit internal, can only flow out from the steam vent being arranged at gas core bit.
The method have the advantages that
Avoid gases at high pressure directly to contact with rock core, rock core is caused erosion, affect coring operation success rate；Thus carry
The high gas drilling centering average yield rate of operation rock core.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the embodiment of the present invention a kind of gas drilling centering instrument.
Fig. 2 is the structural representation of rotation assembly in the embodiment of the present invention a kind of gas drilling centering instrument.
Fig. 3 is the structural representation of gas distribution assembly in the embodiment of the present invention a kind of gas drilling centering instrument.
Fig. 4 is the structure of core grabber molectron in the embodiment of the present invention embodiment of the present invention a kind of gas drilling centering instrument
Schematic diagram.
Fig. 5 is drill bit throat packing device in the embodiment of the present invention embodiment of the present invention a kind of gas drilling centering instrument
Structural representation.
Detailed description of the invention
In order to make objects and advantages of the present invention clearer, below in conjunction with embodiment, the present invention is carried out further
Describe in detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to limit this
Bright.
As it is shown in figure 1, embodiments provide a kind of gas drilling centering instrument, including safety joint 1, always rotate
One-tenth 2, difference pipe nipple 3, gas distribution joint 4, urceolus 5 of coring, coring inner drum 6, core grabber molectron 7, drill bit throat packing dress
Putting 8 and gas core bit 9, threaded with difference pipe nipple 3 in the middle part of described safety joint 1, bottom is with rotation assembly 2 screw thread even
Connect；Threaded with gas distribution joint 4 in described rotation assembly 2 bottom；Described gas distribution joint 4 bottom and coring inner drum 6
Threaded；Threaded with core grabber molectron 7 in described coring inner drum 6 bottom；Described difference pipe nipple 3 bottom and urceolus of coring
5 is threaded；Threaded with gas core bit 9 in described urceolus 5 bottom of coring；Described drill bit throat packing device 8 is placed in
Between gas core bit 9 and core grabber molectron 7, for sealing the ring between gas core bit 9 and core grabber molectron 7
Shape space.
As in figure 2 it is shown, described rotation assembly 2 includes bearing box 24, bearing 23, pressure cap 27 and brake hoop 28, bearing box 24
Being provided with semi-ring 21 in interior mandrel 26, semi-ring 21 is axially provided with the back-up ring 22 of stationary half 21, the side of bearing 23 leads to
Crossing semi-ring 21 and back-up ring 22 is spacing, opposite side is spacing by the end of bearing box 24, and pressure cap 27 is threaded connection with mandrel 26,
Brake hoop 28 is placed in mandrel 26, and brake hoop 28 bossing is placed in mandrel 26 inside grooves, logical regulation pressure cap 27 and brake hoop
The position of 28, can carry out spacing to inner core regulating nut 29, and inner core regulating nut 29 is threadeded with mandrel 26.
As it is shown on figure 3, described gas distribution joint 4 includes shunting valve seat 42 and distributary base 44, shunting valve seat 42 and shunting
Seat 44 is threaded.
As shown in Figure 4, described core grabber molectron 7 includes adapter sleeve 71, guides clip seat 72 and guide clip 73, connects
Set 71 is threadeded with guiding clip seat 72, guides clip 73 and is arranged on guiding clip seat 72 inside, and guiding clip 73 can lead
In clip seat 72 slidably.
As it is shown in figure 5, drill bit throat packing device 8 includes guiding at the sealing of clip seat 72 front end and bit inner surface 82
The ring packing groove 81 being provided with and " o " RunddichtringO 83, it is internal that " o " RunddichtringO 83 is placed in sealed groove 81, and " o " type seals
Circle 83 is sealed on bit inner surface 82, so that gases at high pressure cannot be introduced into drill bit internal, can only core from being arranged at gas
Steam vent 84 on drill bit 9 flows out
Originally, during being embodied in gas drilling centering, high temperature, gases at high pressure enter from safety joint 1 heart portion, downwards
Flow through rotation assembly 2；Wherein the high temperature and high pressure gas of 95% flows to, through mandrel otch 25, urceolus 5 of coring and is formed with coring inner drum 6
Annular space, continue to enter downwards gas core bit 9 heart portion, due between gas core bit 9 and core grabber molectron 7
Being provided with drill bit throat packing device 8, gases at high pressure can not enter inside gas core bit, and therefore this partial high pressure gas is complete
Portion discharges from the steam vent 84 being arranged on gas core bit 9, it is to avoid gases at high pressure directly contact with rock core, to rock core
Cause erosion, affect coring operation success rate；High temperature and high pressure gas rotated assembly 2 heart portion of other 5% enters gas distribution
Joint 4, enters, from the high pressure inlet port 41 being located at shunting valve seat 42, the gas formed between shunting valve seat 42 and distributary base 44
Pressure letdown chamber 43, gases at high pressure rapid spatial expansion, pressure and temperature in gas pressure letdown chamber 43 reduce rapidly.Low temperature low pressure gas
Low pressure gas off-take 45 through being located on distributary base 44 enters in coring inner drum 6, and low-pressure gas can regulate the pressure in coring inner drum 6
Dynamic balance, prevents from being formed in coring inner drum 6 high pressure, hinders rock core to enter in coring inner drum 6.Low-pressure gas continues to flow downwardly through gas
Body core bit 9 heart portion, plays cooling effect for gas core bit 9.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (5)
1. a gas drilling centering instrument, it is characterised in that include safety joint (1), rotation assembly (2), difference pipe nipple
(3), gas distribution joint (4), urceolus of coring (5), coring inner drum (6), core grabber molectron (7), drill bit throat packing device
(8) and threaded with difference pipe nipple (3) in the middle part of gas core bit (9), described safety joint (1), bottom and rotation assembly
(2) threaded；Threaded with gas distribution joint (4) in described rotation assembly (2) bottom；Described gas distribution joint (4)
Threaded with coring inner drum (6) in bottom；Threaded with core grabber molectron (7) in described coring inner drum (6) bottom；Described difference
Threaded with urceolus of coring (5) in value pipe nipple (3) bottom；Described urceolus of coring (5) bottom is with gas core bit (9) screw thread even
Connect；Described drill bit throat packing device (8) is placed between gas core bit (9) and core grabber molectron (7), for blanket gas
Annular space between body core bit (9) and core grabber molectron (7).
A kind of gas drilling centering instrument the most according to claim 1, it is characterised in that described rotation assembly (2) includes
Bearing box (24), bearing (23), pressure cap (27) and brake hoop (28), the mandrel (26) in bearing box (24) is provided with semi-ring
(21), semi-ring (21) is axially provided with the back-up ring (22) of stationary half (21), the side of bearing (23) by semi-ring (21) and
Back-up ring (22) is spacing, and opposite side is spacing by the end of bearing box (24), and pressure cap (27) is threaded connection with mandrel (26), system
Rotating ring (28) is placed in mandrel (26), and brake hoop (28) bossing is placed in mandrel (26) inside grooves, logical regulation pressure cap (27)
With the position of brake hoop (28), can inner core regulating nut (29) be carried out spacing, inner core regulating nut (29) and mandrel (26)
Threaded.
A kind of gas drilling centering instrument the most according to claim 1, it is characterised in that described gas distribution joint (4)
Including shunting valve seat (42) and distributary base (44), shunting valve seat (42) is threadeded with distributary base (44).
A kind of gas drilling centering instrument the most according to claim 1, it is characterised in that described core grabber molectron (7)
Including adapter sleeve (71), guiding clip seat (72) and guide clip (73), adapter sleeve (71) connects with guiding clip seat (72) screw thread
Connecing, guide clip (73) and be arranged on guiding clip seat (72) inside, guiding clip (73) can in guiding clip seat (72) freely
Slide.
A kind of gas drilling centering instrument the most according to claim 1, it is characterised in that drill bit throat packing device (8)
Including guiding the ring packing groove (81) being provided with at clip seat (72) front end and the sealing of bit inner surface (82) and " o " type is close
Seal (83), it is internal that " o " RunddichtringO (83) is placed in sealed groove (81), and " o " RunddichtringO (83) is sealed in bit inner surface
(82) on, so that gases at high pressure cannot be introduced into drill bit internal, can only be from the steam vent being arranged at gas core bit (9)
(84) flow out in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610681745.8A CN106121574A (en) | 2016-08-12 | 2016-08-12 | A kind of gas drilling centering instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610681745.8A CN106121574A (en) | 2016-08-12 | 2016-08-12 | A kind of gas drilling centering instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106121574A true CN106121574A (en) | 2016-11-16 |
Family
ID=57279893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610681745.8A Pending CN106121574A (en) | 2016-08-12 | 2016-08-12 | A kind of gas drilling centering instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106121574A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837229A (en) * | 2017-01-17 | 2017-06-13 | 中国石油大学(华东) | Particle stream flow coring apparatus |
| CN107060676A (en) * | 2017-04-21 | 2017-08-18 | 四川川庆石油钻采科技有限公司 | A kind of horizontal well coring tool |
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|---|---|---|---|---|
| CN2816336Y (en) * | 2005-07-20 | 2006-09-13 | 四川石油管理局 | Core taking-out tool |
| CN101644141A (en) * | 2009-08-24 | 2010-02-10 | 中国石油天然气集团公司 | Gas distributary joint suitable for gas drilling coring tool |
| CN202914005U (en) * | 2012-11-09 | 2013-05-01 | 中国石油集团川庆钻探工程有限公司 | Core claw assembly suitable for pressurization type coring tool |
| CN103775013A (en) * | 2012-10-20 | 2014-05-07 | 中国石油化工股份有限公司 | Differential type air-drilling coring device and differential type air-drilling coring method |
| CN205382900U (en) * | 2016-03-14 | 2016-07-13 | 四川川庆石油钻采科技有限公司 | Underbalance coring tool of protection mandrel |
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2016
- 2016-08-12 CN CN201610681745.8A patent/CN106121574A/en active Pending
Patent Citations (7)
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|---|---|---|---|---|
| CN2816336Y (en) * | 2005-07-20 | 2006-09-13 | 四川石油管理局 | Core taking-out tool |
| CN101644141A (en) * | 2009-08-24 | 2010-02-10 | 中国石油天然气集团公司 | Gas distributary joint suitable for gas drilling coring tool |
| CN103775013A (en) * | 2012-10-20 | 2014-05-07 | 中国石油化工股份有限公司 | Differential type air-drilling coring device and differential type air-drilling coring method |
| CN202914005U (en) * | 2012-11-09 | 2013-05-01 | 中国石油集团川庆钻探工程有限公司 | Core claw assembly suitable for pressurization type coring tool |
| CN205400638U (en) * | 2016-03-11 | 2016-07-27 | 四川川庆石油钻采科技有限公司 | Coring tool |
| CN205382900U (en) * | 2016-03-14 | 2016-07-13 | 四川川庆石油钻采科技有限公司 | Underbalance coring tool of protection mandrel |
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Non-Patent Citations (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837229A (en) * | 2017-01-17 | 2017-06-13 | 中国石油大学(华东) | Particle stream flow coring apparatus |
| CN107060676A (en) * | 2017-04-21 | 2017-08-18 | 四川川庆石油钻采科技有限公司 | A kind of horizontal well coring tool |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161116 |