CN109025875A - A kind of built-in steel-ball type hydraulic differential mechanism - Google Patents
A kind of built-in steel-ball type hydraulic differential mechanism Download PDFInfo
- Publication number
- CN109025875A CN109025875A CN201810918613.1A CN201810918613A CN109025875A CN 109025875 A CN109025875 A CN 109025875A CN 201810918613 A CN201810918613 A CN 201810918613A CN 109025875 A CN109025875 A CN 109025875A
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- China
- Prior art keywords
- pitching
- piston
- pressure
- steel
- steel ball
- Prior art date
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 51
- 239000010959 steel Substances 0.000 claims abstract description 51
- 238000005553 drilling Methods 0.000 claims abstract description 19
- 239000000725 suspension Substances 0.000 claims description 24
- 238000007789 sealing Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 7
- 238000010008 shearing Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 4
- 239000000178 monomer Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 1
- 230000003628 erosive effect Effects 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 5
- 238000011010 flushing procedure Methods 0.000 description 11
- 239000011435 rock Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000009699 differential effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
A kind of built-in steel-ball type hydraulic differential mechanism, it is made of pitching part and differential portion, the pitching is partially disposed on above differential portion, and pitching part is equipped with pitching piston jacket, pitching piston, pitching piston limit set, pitching spring, steel ball room and the steel ball that builds the pressure；The pitching piston jacket is inlaid on the outer tube wall of cord coring drill；The pitching piston is placed in pitching piston jacket, for hollow cylinder, the upper end is equipped with the first bearing disc, lower end passes through steel ball room, inside wedge-shaped boss is equipped in pitching piston base, pitching spring is assembled in a manner of precommpression between the first bearing disc and steel ball room, and is set with pitching piston limit set in the outside of pitching spring.The present invention completes to force coring operation by the build the pressure combination of mode of built-in steel ball mode and pitching, has achieved the purpose that core recovery percentage and coring efficiency when the troublesome zone drillings corings such as raising is loose, broken, cementing properties is poor, weak, easy erosion.
Description
Technical field
The present invention relates to a kind of two-tube core drill, the built-in steel-ball type hydraulic differential of especially a kind of two-tube core drill
Mechanism.
Background technique
To grasp subsurface geology situation, true and reliable underground rock generally is directly obtained by way of (well) coring that drills
Layer data, with coring drilling (well) continuous intensification, bore meet bad ground the case where it is more and more, loose, broken, cementing
When the troublesome zone drillings corings such as poor, weak, the easy erosion of property, core recovery percentage is extremely low, or even the feelings for not acquiring rock core occurs
Condition.Related researcher has developed pressure coring tool thus, by adding pressure type differential attachment, realizes that core grabber is forced to collapse and embraces
Tight rock core, to solve the problems, such as that bad ground core recovery percentage is low.
In the prior art, force coring tool include single-action twin-pipes force core drill, double movable double-tube force core drill,
Rope forces core drill, and wherein single-action twin-pipes, double movable double-tube force core drill to be all made of from hole (well) mouth and put into steel ball
Mode, utilize steel ball carry out pressure transmitting；But needing front and back from the mode of aperture pitching, turn on pump, operating process are more numerous twice
Trivial, process is more, and steel ball falls into that the shaft bottom time is long, and with the continuous intensification of drilling, time-consuming will increasingly be grown, and be increased excessive
Non-cutting time.Rope forces core drill top to be provided with salvaging mechanism and suspension mechanism, and steel ball can not pass through, and can only use liquid
The mode of power pressurization controls flushing liquor access and closed circuit switching to pressure, by pilot operated directional control valve, realizes differential action, completes strong
Produce the heart；But since its pressing mechanism designs relative complex, slightly pressure release high to the requirement of hydraulic dynamic sealing, water route commutation action
It will be difficult to realize, in addition, use reliability is poor, and once motion gets muddled since part movement is more, will be unable to judgement is
It is no to have completed to force coring, if brill is mentioned when troublesome zone drilling easily, it is most likely that loose, broken formation rock core is caused to take off
It falls, proficiency geologic information is caused to lose.
Summary of the invention
The present invention provides a kind of built-in steel-ball type hydraulic differential mechanism, it is intended to pass through built-in steel ball mode and the pitching side of building the pressure
The combination of formula is completed to force coring operation, reaches and improves the troublesome zone drillings such as loose, broken, cementing properties is poor, weak, easy erosion
The purpose of core recovery percentage and coring efficiency when coring.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of built-in steel-ball type hydraulic differential mechanism, is placed in the outer tube of core drill, is made of pitching part and differential portion,
The pitching is partially disposed on above differential portion, and pitching part is equipped with pitching piston jacket, pitching piston, pitching piston limit
Set, pitching spring, steel ball room and the steel ball that builds the pressure；The pitching piston jacket is hung on the outer tube wall of core drill, drilling tool
After the jointed rod of top, pitching piston jacket is positioned；The pitching piston is placed in pitching piston jacket, is hollow circuit cylinder
Body, the upper end are equipped with the first bearing disc, and lower end passes through steel ball room, inside wedge-shaped boss are equipped in pitching piston base, normally
In drilling process, cooperate support to build the pressure steel ball in steel ball room by wedge-shaped boss and steel ball chamber interior walls, the first bearing disc with
Pitching spring is assembled between steel ball room in a manner of precommpression, and is set with pitching piston limit set in the outside of pitching spring.
Above-mentioned built-in steel-ball type hydraulic differential mechanism, is arranged on the lateral wall of the first bearing disc of pitching piston upper end
First sealing ring.
Above-mentioned built-in steel-ball type hydraulic differential mechanism, setting is for limiting the steel ball uplink that builds the pressure in the steel ball chamber interior walls
First resilient key of position.
Above-mentioned built-in steel-ball type hydraulic differential mechanism, the differential portion includes pressure piston housing, pressure piston, positioning
Pin, limit sleeve, piston guide set, pressure release set, suspension joint, suspension gasket, shearing sliding sleeve, drainage joint, inner pipe joint and the
Two resilient keys；The outer set upper side of the pressure piston is threadedly coupled with pitching piston jacket, and lower end is connect with pressure release external threading；It is described
Pressure piston is placed in pressure piston jacket internal, is hollow cylinder, end is equipped with the second bearing disc on it, and inner cavity is upper and lower
Two-part shoulder hole structure, inner cavity upper section aperture are greater than inner cavity lower section aperture, drainage hole are arranged on the side wall of inner cavity upper section,
The outside on pressure piston top is set with limit sleeve, and pressure piston is connect with limit sleeve by positioning pin, set in pressure piston lower part
There is annular boss, pressure piston is equipped by the annular boss and suspension gasket；The suspension joint by suspension pad support,
Suspension joint lower end is threadedly coupled with drainage joint；The shearing sliding sleeve is placed between pressure piston and inner pipe joint, is located at pressure
Power piston annular boss by the second resilient key with inner pipe joint in the following, connect.
Above-mentioned built-in steel-ball type hydraulic differential mechanism, the suspension gasket is separate structure, by two half-ring gasket lists
Body composition.
Above-mentioned built-in steel-ball type hydraulic differential mechanism is equipped with the on the second bearing disc of pressure piston upper end lateral wall
Two sealing rings.
Above-mentioned built-in steel-ball type hydraulic differential mechanism, is respectively set third in the upper and lower two sides of pressure piston drainage hole
Sealing ring and the 4th sealing ring.
The present invention is a kind of built-in steel-ball type hydraulic differential mechanism of two-tube core drill, it uses the wound of built-in steel ball
New design, its working principle is that: normal core-drilling when the small pump amount of flushing liquor keeps steel ball not fall；When needing to force coring,
Pump amount is adjusted to maximum, flushing liquor is increased by the dynamic pressure that pitching piston intermediate throughholes generate, and driving pitching piston is to moving down
Dynamic, the steel ball that builds the pressure falls into the variable diameter position of pressure piston stepped hole from steel ball room, completes steel ball and launches；Steel ball is launched into a backlash
Pump amount is adjusted to minimum by washing lotion pressure rise, operator, makes flushing liquor pressure rise by the steel ball mode of building the pressure；In flushing liquor
Pressure acts on lower pressure piston and moves down, and upper positioning pin is sheared, and pressure piston pushes lower drilling tool to generate differential displacement, opens
Begin to force coring；Differential action is finished, and pressure release water route is got through, and mud pump pressure drops to normal circulation pressure, prompts behaviour
It forces coring to terminate as personnel, starts to extract rock core.The present invention is designed by built-in steel ball, is avoided and is launched since earth's surface
The cumbersome technique of steel ball, it is easy to operate, it is high-efficient, it executes reliably, non-cutting time is short, and the several of drilling accident generation are effectively reduced
Rate.In conclusion the present invention by built-in steel ball mode and pitching build the pressure mode combination complete force coring operation, reach
Core recovery percentage and coring effect when improving the troublesome zone drillings corings such as loose, broken, cementing properties is poor, weak, easy erosion
The purpose of rate.
Detailed description of the invention
Fig. 1 is overall structure of the present invention；
Fig. 2 is pitching piston structure schematic diagram；
Fig. 3 is pressure piston structural schematic diagram；
Fig. 4 to Fig. 7 is course of work schematic diagram of the present invention.
Each list of reference numerals in figure are as follows:
1, pitching piston jacket, 2, pitching piston, 2-1, the first bearing disc, 2-2, wedge-shaped boss, 3, pitching piston limit set, 4,
Pitching spring, the outer tube of 5 two-tube core drills, 6, steel ball room, 7, build the pressure steel ball, 8, pressure piston housing, 9, pressure piston, 9-
1, the second bearing disc, 9-2, drainage hole, 9-3, annular boss, 10, positioning pin, 11, limit sleeve, 12, piston guide set, 13, let out
Pressing sleeve, 14, suspension joint, 15, suspension gasket, 16, shearing sliding sleeve, 17, drainage joint, 18, inner pipe joint, 19, inner tube；
B1, the first sealing ring, B2, the first resilient key, B3, the second sealing ring, B4, third sealing ring, B5, the 4th sealing ring, B6,
Second resilient key.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the invention will be further described.
Referring to Fig. 1, Fig. 2, the present invention is a kind of built-in steel-ball type hydraulic differential mechanism of two-tube core drill, it is placed in
It in the outer tube 5 of core drill, is made of pitching part and differential portion, the pitching is partially disposed on above differential portion, is thrown
Ball portion is equipped with pitching piston jacket 1, pitching piston 2, pitching piston limit set 3, pitching spring 4, steel ball room 6 and the steel ball that builds the pressure
7；The pitching piston jacket 1 is suspended on 5 inner wall of outer tube of core drill；The pitching piston 2 is placed in pitching piston jacket 1
In, be hollow cylinder, the upper end be equipped with the first bearing disc 2-1, lower end pass through steel ball room 6,2 bottom of pitching piston be equipped with to
Interior wedge-shaped boss 2-2 in normal drilling process, cooperates support to build the pressure steel ball 7 by wedge-shaped boss 2-2 and 6 inner wall of steel ball room
In steel ball room 6, pitching spring 4 is assembled in a manner of precommpression between the first bearing disc 2-1 and steel ball room 6, and in pitching bullet
The outside suit pitching piston limit set 3 of spring 4；It is arranged first on the lateral wall of 2 upper end the first bearing disc 2-1 of pitching piston
Sealing ring B1；Setting is for limiting the first resilient key B2 of 7 upward position of steel ball that builds the pressure on 6 inner wall of steel ball room.
Referring to Fig. 1, Fig. 3, built-in steel-ball type hydraulic differential mechanism of the present invention, the differential portion includes pressure piston
Housing 8, pressure piston 9, positioning pin 10, limit sleeve 11, piston guide set 12, pressure release set 13, suspension joint 14, suspension gasket
15, sliding sleeve 16, drainage joint 17, inner pipe joint 18 and the second resilient key B6 are sheared；8 upper end of pressure piston housing and pitching
Piston jacket 1 is threadedly coupled, and lower end is threadedly coupled with pressure release set 13；The pressure piston 9 is placed in inside pressure piston housing 8,
For hollow cylinder, end is equipped with the second bearing disc 9-1 on it, and inner cavity is two sections formula shoulder hole structure, inner cavity upper section
Aperture is greater than inner cavity lower section aperture, and drainage hole 9-2, the outer surface cover on 9 top of pressure piston are arranged on the side wall of inner cavity upper section
Limit sleeve 11 is filled, pressure piston 9 is connect by positioning pin 10 with limit sleeve 11, is equipped with annular boss 9- in 9 lower part of pressure piston
3, pressure piston 9 is equipped by the annular boss 9-3 and suspension gasket 15, and the suspension gasket 15 is separate structure, by two
A half-ring gasket monomer composition；The suspension joint 14 is supported by suspension gasket 15,14 lower end of suspension joint and drainage joint
17 are threadedly coupled；The shearing sliding sleeve 16 is placed between pressure piston 9 and inner pipe joint 18, is located at 9 annular boss of pressure piston
9-3 by the second resilient key B6 with inner pipe joint 18 in the following, connect；9 upper end the second bearing disc 9-1 lateral wall of pressure piston
It is equipped with the second sealing ring B3, the sealing of third sealing ring B4 and the 4th is respectively set in the 9 upper and lower two sides drainage hole 9-2 of pressure piston
Enclose B5.
Referring to Fig. 4 to Fig. 7, built-in steel-ball type hydraulic differential mechanism of the present invention, the course of work are as follows: the small pump of flushing liquor
Normal core-drilling when amount, the holding steel ball 7 that builds the pressure do not fall (as shown in Fig. 4)；Loose, broken, cementing properties is poor, it is weak,
When the troublesome zone drillings corings such as easy erosion, the steel ball 7 that builds the pressure falls to 9 inner cavity stepped hole variable diameter position of pressure piston for flushing liquor
Flow channels closure builds the pressure (as shown in Fig. 5), and pressure piston 9 moves down under the effect of flushing of hydraulic power, 10 quilt of positioning pin
Shearing, pressure piston 9 pushes lower drilling tool to generate preset maximum differential and is displaced H, while two-tube core drill inner tube is total
At the heart pawl of holding together all collapse, hold rock core, the pressure release of drainage hole 9-2, pressure release set 13 of the flushing liquor through 9 side wall of pressure piston tightly
Hole flows into 5 annular gap of outer tube of inner tube 19 and two-tube core drill, and flushing liquor normal circulation, fluid-pump pressure release above mentions
Drilling rod breaks rock core, mentions and is drilled into ground, then takes out rock core (as shown in Fig. 6)；When coring is excessively soft, broken formation
Afterwards, stratum becomes complete, is hardened, and holds together the gathering of heart claw portion, holds rock core tightly, and differential displacement at this time is H1(H1 < H), pressure piston 9 exists
Continue to move down under the action of flushing liquor pressure, the second resilient key B6 is sheared, pressure release water route connection, fluid-pump pressure release above mentions
Drilling rod breaks rock core, mentions and is drilled into ground, then takes out rock core (as shown in Fig. 7).
Claims (7)
1. a kind of built-in steel-ball type hydraulic differential mechanism, is placed in the outer tube (5) of two-tube core drill, characterized in that it is by throwing
Ball portion and differential portion composition, the pitching are partially disposed on above differential portion, and pitching part is equipped with pitching piston jacket
(1), pitching piston (2), pitching piston limit set (3), pitching spring (4), steel ball room (6) and the steel ball that builds the pressure (7)；The pitching
Piston jacket (1) is inlaid on outer tube (5) inner wall of cord coring drill；The pitching piston (2) is placed in pitching piston jacket
It (1) is hollow cylinder in, the upper end is equipped with the first bearing disc (2-1), and lower end passes through steel ball room (6), in pitching piston (2)
Bottom is equipped with inside wedge-shaped boss (2-2), in normal drilling process, is matched by wedge-shaped boss (2-2) and steel ball room (6) inner wall
It closes support and builds the pressure steel ball (7) in steel ball room (6), filled in a manner of precommpression between the first bearing disc (2-1) and steel ball room (6)
Pitching piston limit set (3) are set with pitching spring (4), and in the outside of pitching spring (4).
2. built-in steel-ball type hydraulic differential mechanism according to claim 1, characterized in that on the pitching piston (2)
It holds and the first sealing ring (B1) is set on the lateral wall of the first bearing disc (2-1).
3. the built-in steel-ball type hydraulic differential mechanism of two-tube core drill according to claim 1 or 2, characterized in that
Setting is for limiting first resilient key (B2) of the steel ball that builds the pressure (7) upward position on steel ball room (6) inner wall.
4. built-in steel-ball type hydraulic differential mechanism according to claim 3, characterized in that the differential portion includes pressure
Piston jacket (8), pressure piston (9), positioning pin (10), limit sleeve (11), piston guide set (12), pressure release set (13), suspension
Connector (14), suspension gasket (15), shearing sliding sleeve (16), drainage joint (17), inner pipe joint (18) and the second resilient key (B6)；
Pressure piston housing (8) upper end is threadedly coupled with pitching piston jacket (1), and lower end is threadedly coupled with pressure release set (13)；Institute
It states pressure piston (9) and is placed in pressure piston housing (8) inside, be hollow cylinder, end is equipped with the second bearing disc (9- on it
1), inner cavity is two sections formula shoulder hole structure, and inner cavity upper section aperture is greater than inner cavity lower section aperture, the side wall of upper section in inner cavity
Upper setting drainage hole (9-2) is set with limit sleeve (11) in the outside on pressure piston top, and pressure piston (9) passes through positioning pin
(10) it is connect with limit sleeve (11), is equipped with annular boss (9-3) in pressure piston (9) lower part, pressure piston (9) passes through the ring
Shape boss (9-3) and suspension gasket (15) are equipped；The suspension joint (14) is supported by suspension gasket (15), suspension joint (14)
Lower end is threadedly coupled with drainage joint (17)；The shearing sliding sleeve (16) is placed between pressure piston (9) and inner pipe joint (18),
Positioned at pressure piston (9) annular boss (9-3) in the following, being connect by the second resilient key (B6) with inner pipe joint (18).
5. built-in steel-ball type hydraulic differential mechanism according to claim 4, characterized in that the suspension gasket (15) is point
Body structure, by two half-ring gasket monomer compositions.
6. built-in steel-ball type hydraulic differential mechanism according to claim 5, characterized in that on the pressure piston (9)
The second bearing disc (9-1) lateral wall is held to be equipped with the second sealing ring (B3).
7. built-in steel-ball type hydraulic differential mechanism according to claim 6, characterized in that arranged in the pressure piston (9)
Third sealing ring (B4) and the 4th sealing ring (B5) is respectively set in the upper and lower two sides of fluid apertures (9-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810918613.1A CN109025875A (en) | 2018-08-13 | 2018-08-13 | A kind of built-in steel-ball type hydraulic differential mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810918613.1A CN109025875A (en) | 2018-08-13 | 2018-08-13 | A kind of built-in steel-ball type hydraulic differential mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109025875A true CN109025875A (en) | 2018-12-18 |
Family
ID=64633026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810918613.1A Pending CN109025875A (en) | 2018-08-13 | 2018-08-13 | A kind of built-in steel-ball type hydraulic differential mechanism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110955988A (en) * | 2019-10-30 | 2020-04-03 | 郑州飞机装备有限责任公司 | Modeling method for solving dynamic characteristics of hanging ejection mechanism by using ADAMS |
| CN114320197A (en) * | 2022-02-12 | 2022-04-12 | 东北石油大学 | Piston type controllable differential mechanism for fidelity coring device |
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