CN1603569A - Submersible pump type hydraulic impactor - Google Patents
Submersible pump type hydraulic impactor Download PDFInfo
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- CN1603569A CN1603569A CN 200410061053 CN200410061053A CN1603569A CN 1603569 A CN1603569 A CN 1603569A CN 200410061053 CN200410061053 CN 200410061053 CN 200410061053 A CN200410061053 A CN 200410061053A CN 1603569 A CN1603569 A CN 1603569A
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Abstract
The invention designs a kind of page to move the impact. Dives the water pump type fluid to move the impact, its characteristic is: It presses the plunger reciprocation including the pulsation type to attack the installment, the anvil (3), attracts pours water the installment, gets down attaches (31), the pulsation hydraulic pressure plunger reciprocation attacks the installment the cylinder body (26) lower part with anvil (3) upside skids the seal to be honest, the anvil (3) lower part with attracts pours water the installment (10) the upper extreme connection, attracts pours water the installment valve body (30) lower extremity attaches (31) to under upper extreme connection; The pulsation hydraulic pressure plunger reciprocation attacks the installment the work embolism (7) (3) between to be equipped with the impact cavity with the anvil (33), the impact cavity (33) the axial size is smaller than the work plunger (7) travelling schedule. The invention both may deep dive the water pump use as the festival diamond drill bit, and may draw support from the hole bottom formation water the close up to circulate actuates die, the realization ordinary rotation - impact sneaks in, in the remarkable enhancement the hard above rock layer sneaks in the efficiency.
Description
Technical field
The invention belongs to the probing field, be specifically related to a kind of hydraulic impacter, be used for water-deficient area, the face of land and realize facility at the bottom of the hole of revolution-percussion drilling.
Background technology
At present a large amount of traditional hydraulic impacters that adopt must adopt the higher special-purpose drill hammer of price in the production practices, and will consume a large amount of surface water and drive, under the condition of may be used to hardly to hole severe leakage, water supply difficulty or lack of water.
Summary of the invention
Deficiency at traditional hydraulic impacter, the object of the present invention is to provide a kind of submersible pump formula hydraulic impacter, can drive block stamp by the closed cycle of formation water at the bottom of the hole, both realize water conservation boring, can realize the drilling tool of revolution-percussion drilling again with common rotary bit.
To achieve these goals, technical scheme of the present invention is: submersible pump formula hydraulic impacter, it is characterized in that: it comprises the reciprocal percussion mechanism of pulsation water pressure plunger, anvil 3, suction water device, lower contact 31, the bottom of the cylinder body 26 of the reciprocal percussion mechanism of pulsation water pressure plunger is connected with the top slipper seal of anvil 3, the bottom of anvil 3 is connected with the upper end of the valve body 10 of suction water device, fixedlys connected with the upper end of lower contact 31 in the lower end of the valve body 30 of suction water device; In the lower contact 31 is cavity, be provided with between the work plunger 7 of the reciprocal percussion mechanism of pulsation water pressure plunger and the anvil 3 and impact chamber 33, impact chamber 33 axial dimensions less than work plunger 7 strokes, have central passage 4 in the anvil 3, central passage 4 communicates with impacting chamber 33, and an end in the unidirectional suction road of suction water device communicates with central passage 4, and the other end and valve body 10 are interlinked to the outside, one end in the one way entrapped water road of suction water device communicates with central passage 4, and the other end communicates with the cavity of lower contact 31.
The reciprocal percussion mechanism of described pulsation water pressure plunger comprises cylinder body 16, housing 21, cylindrical housing 1, cylinder body 26, working spring 19, driving ram 5, connecting rod 6, work plunger 7, upper support ring 18, lower support ring 20, globular hinge 32, have driving ram chamber 15 on the cylinder body 16, in the housing 21 is the connecting rod chamber, the lower end of cylinder body 16 is connected with the upper end of housing 21, driving ram chamber 15 is connected with the connecting rod chamber, in the cylindrical housing 1 is cavity, cylindrical housing 1 cavity upper end is the lower support ring cavity, cylindrical housing 1 cavity lower end is a joint, in the cylinder body 26 is cavity, the lower end of housing 21 is connected with cylindrical housing 1, and cylindrical housing 1 lower end is connected with the upper end of cylinder body 26; Driving ram 5 is positioned at driving ram chamber 15, because the existence of driving ram makes driving ram chamber 15 obstructed with the water route in connecting rod chamber, driving ram 5 has connecting rod 6, connecting rod 6 is positioned at the connecting rod chamber, the upper end of connecting rod 6 is with upper support ring 18, be with working spring 19 successively on the connecting rod 6 under the upper support ring 18, lower support ring 20, work plunger 7 is positioned at the cavity of cylindrical housing 1, the lower end of connecting rod 6 is hinged with the upper end of work plunger 7 by globular hinge 32, the cavity of the lower end of work plunger 7 is for impacting chamber 33, and the lower end of cylinder body 26 is interior projection joint, and the slipper seal that matches of the interior projection joint of cylinder body 26 and the upper grooves 2 of anvil 3 is connected.
Described anvil 3 has central passage 4, central passage 4 communicates with impact chamber 33, the top of anvil 3 has groove 2, the axial footpath of groove 2 is greater than the axial footpath of interior projection of cylinder body 26, the slipper seal that matches of the interior projection interface of cylinder body 26 and the upper grooves 2 of anvil 3 is connected, and the lower end of anvil 3 is connected with the upper end of valve body 10.
Described suction water device comprises valve body 10, valve body 30, suction valve 13, outlet valve 14, and the upper end of valve body 10 is connected with anvil 3 lower ends, and the upper end of valve body 30 is connected with the lower end of valve body 10, and the lower end of valve body 30 is connected with the upper end of lower contact 31; Valve body 10 is provided with unidirectional suction road, unidirectional suction road comprises horizontal channel 12, chamber 11, one end of horizontal channel 12 and valve body 10 exterior, the other end communicates with chamber 11, chamber 11 communicates with central passage 4, be provided with suction valve 13 in the chamber 11, there is spring on the top on the suction valve 13, is spacing ring 25 on the spring; Have limbers 28 on the valve body 10, have chamber 29 on the valve body 30, described one way entrapped water road comprises limbers 28, chamber 29, one end of limbers 28 communicates with central passage 4, the other end communicates with chamber 29, and chamber 29 communicates with the cavity of lower contact 31, is provided with outlet valve 14 in the chamber 29, there is spring on 14 times tops of outlet valve, and spring is spacing ring 34 down.
During work, under the waterpower pulse that face of land probing pump 37 provides drives, driving ram 5 and work plunger (block stamp) 7 move down, the liquid of anvil 3 upper chamber is pressed to draining valve realize liquid local circulation at the bottom of the hole, the plunger (block stamp) of working simultaneously hits anvil, realize synchronous water saving revolution-percussion drilling, hard drilling efficiency in the raising with mantlerock.
Advantage of the present invention is: the submersible pump that both can be used as water conservation boring uses, and can drive block stamp by the closed cycle of formation water at the bottom of the hole again, realizes the revolution-percussion drilling of common rotary bit, hard drilling efficiency with mantlerock in significantly improving.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is an application schematic diagram of the present invention
Among the figure: 1-cylindrical housing, 2-groove, 3-anvil, 4-central passage, 5-driving ram, 6-connecting rod, the 7-plunger of working, the 8-central passage, the 9-reversing valve, 10-valve body, 11-chamber, 12-horizontal channel, the 13-suction valve, 14-outlet valve, 15-driving ram chamber, the 16-cylinder body, 17-sealing ring, 18-upper support ring, the 19-working spring, 20-lower support ring, 21-housing, the 22-interconnection, 23-spacing ring, 24-sealing ring, the 25-spacing ring, 26-cylinder body, 27-sealing ring, the 28-limbers, 29-chamber, 30-valve body, the 31-lower contact, the 32-globular hinge, 33-impacts the chamber, the 34-spacing ring, 35-submersible pump formula hydraulic impacter, 36-drill string, 37-face of land probing pump, 38-pulsator, 39-piston.
The specific embodiment
As shown in Figure 1, submersible pump formula hydraulic impacter, it comprises the reciprocal percussion mechanism of pulsation water pressure plunger, anvil 3, suction water device, lower contact 31, the top of the cylinder body 16 of the reciprocal percussion mechanism of pulsation water pressure plunger can be connected with drill string 36, the bottom of the cylinder body 26 of the reciprocal percussion mechanism of pulsation water pressure plunger is connected with the top slipper seal of anvil 3, the bottom of anvil 3 is connected with the upper end of the valve body 10 of suction water device, and the lower end of the valve body 30 of suction water device is connected with the upper end of lower contact 31; In the lower contact 31 is cavity, the lower end of lower contact 31 is connected with drill string, be provided with between the work plunger 7 of the reciprocal percussion mechanism of pulsation water pressure plunger and the anvil 3 and impact chamber 33, impact the stroke of chamber 33 axial dimensions less than work plunger 7, have central passage 4 in the anvil 3, central passage 4 communicates with impact chamber 33, one end in the unidirectional suction road of suction water device communicates with central passage 4, the other end and valve body 10 are interlinked to the outside, one end in the one way entrapped water road of suction water device communicates with central passage 4, and the other end communicates with the cavity of lower contact 31.
The reciprocal percussion mechanism of described pulsation water pressure plunger comprises cylinder body 16, housing 21, cylindrical housing 1, cylinder body 26, working spring 19, driving ram 5, connecting rod 6, work plunger 7, upper support ring 18, lower support ring 20, globular hinge 32, have driving ram chamber 15 on the cylinder body 16, in the housing 21 is the connecting rod chamber, the lower end of cylinder body 16 is connected with the upper end of housing 21, the driving ram chamber is connected with the connecting rod chamber, the lower end of housing 21 is connected with the upper end of cylindrical housing 1, and cylindrical housing 1 lower end is connected with the upper end of cylinder body 26; Driving ram 5 is positioned at the driving ram chamber, and driving ram 5 has connecting rod 6, and connecting rod 6 is positioned at the connecting rod chamber, and the upper end of connecting rod 6 is with upper support ring 18, is with working spring 19, lower support ring 20 on the connecting rod 6 under the upper support ring 18 successively; Work plunger 7 is positioned at cylindrical housing 1, the lower end of connecting rod 6 is hinged with the upper end of work plunger 7 by globular hinge 32, the lower end of work plunger 7 is for impacting chamber 33, and the lower end of cylinder body 26 is interior projection interface, and the slipper seal that matches of the interior projection interface of cylinder body 26 and the upper grooves 2 of anvil 3 is connected.
Be provided with sealing ring 17 between the driving ram 5 of the reciprocal percussion mechanism of described pulsation water pressure plunger and the cylinder body 16, sealing ring 17 is positioned at the seal groove on the cylinder body 16; Be provided with sealing ring 24 between work plunger 7 and the cylinder body 26, sealing ring 24 is positioned at the seal groove on the cylinder body 26; Be provided with sealing ring 27 between anvil 3 and the cylinder body 26, sealing ring 27 is positioned at the seal groove on the cylinder body 26.
Have the water hole on the lower support ring 20 of the reciprocal percussion mechanism of described pulsation water pressure plunger, the water hole of lower support ring 20 communicates with the connecting rod chamber, work plunger 7 upper ends have interconnection 22, interconnection 22 communicates with the water hole of lower support ring 20, the interconnection of work plunger 7 has central passage 8 22 times, central passage 8 upper ends communicate with interconnection 22, central passage 8 lower ends communicate with impact chamber 33, be provided with reversing valve 9 in the central passage 8, the lower end of reversing valve 9 is provided with the top spring, and the top spring is spacing ring 23 down.
Described anvil 3 has central passage 4, central passage 4 communicates with impact chamber 33, the top of anvil 3 has groove 2, the axial footpath of groove 2 is greater than the axial footpath of interior projection of cylinder body 26, the slipper seal that matches of the interior projection interface of cylinder body 26 and the upper grooves of anvil 3 is connected, and the lower end of anvil 3 is connected with the upper end of valve body 10.
Described suction water device comprises valve body 10, valve body 30, suction valve 13, outlet valve 14, and the upper end of valve body 10 is connected with anvil 3 lower ends, and the lower end of valve body 10 is connected with the upper end of valve body 30, and the lower end of valve body 30 is connected with the upper end of lower contact 31; Valve body 10 is provided with unidirectional suction road, unidirectional suction road comprises horizontal channel 12, chamber 11, one end of horizontal channel 12 and valve body 10 exterior, the other end communicates with chamber 11, chamber 11 communicates with central passage 4, be provided with suction valve 13 in the chamber 11, there is spring on the top on the suction valve 13, is spacing ring 25 on the spring; Have limbers 28 on the valve body 10, have chamber 29 on the valve body 30, described one way entrapped water road comprises limbers 28, chamber 29, one end of limbers 28 communicates with central passage 4, the other end communicates with chamber 29, and chamber 29 communicates with the cavity of lower contact 31, is provided with outlet valve 14 in the chamber 29, there is spring on 14 times tops of outlet valve, and spring is spacing ring 34 down.
The present invention is in the following manner: as shown in Figure 2, submersible pump formula hydraulic impacter 38 is lowered in the boring with drill string 34, must be full of formation water (flushing liquor) in the position that submersible pump formula hydraulic impacter 35 is lowered to.Because face of land probing pump 37 has been installed pulsator 38, arrive the driving ram chamber 15 on driving ram 5 tops of submersible pump formula hydraulic impacter 35 by the liquid transfer that is full of drill string from the waterpower pulse of face of land probing pump.As shown in Figure 1, the driving ram 5 of water conservation boring submersible pump and connecting rod 6 drive work plunger 7 to bottom offset under the pulsation hydraulic action, working spring 19 on the compression connecting rod 6 between upper support ring 18, lower support ring 20, and the liquid that impacts in the chamber 33 pressed to chamber 29 by limbers 28, at the bottom of outlet valve 14, drill string and particle size drilling tool flow to the hole (not drawing among Fig. 1).
When face of land probing pump reverse stroke (by piston 39), because the effect of pulsator descends the water pressure in the pipeline, compressed working spring 19 recovers, and gives active force that makes progress of driving ram by upper support ring 18; Simultaneously, by horizontal channel 12, chamber 11, suction valve 13 with impact the lower end that chamber 33 acts on work plunger 7, make driving ram 5 and work plunger 7 turn back to original position from the pressure and hydrostatic pressure of the pipe external space.The water of at this moment managing the external space is full of through the suction valve of opening and impacts chamber 33.Then, come again, again to bottom offset,, begun a new circulation at the bottom of impacting chamber 33 interior liquid and pressing to the hole at its effect underdrive plunger 5, work plunger 7 from the next waterpower pulse of pulsator.
When submersible pump formula hydraulic impacter was devoted oneself to work, axial load directly was added on the anvil 3 by cylindrical housing 1, cylinder body 26.Waterpower pulse from face of land probing pump 37 drives driving ram 5, connecting rod 6 and work plunger (block stamp) 7 to bottom offset, compresses the working spring between connecting rod upper supporting ring, lower support ring.When work plunger (block stamp) 7 moved downward, the liquid that anvil 3 tops is impacted chamber 33 was pressed to valve body 10, and by groove (slipper seal) 2 moment of torsion is passed to anvil 3.Distance between anvil 3 and the work plunger (block stamp) 7 is slightly less than the stroke of work plunger, and anvil 3 is not in the upper limb position when being hit by work plunger (block stamp) 7, hits the back and allows anvil that certain downward displacement is arranged.When work plunger (block stamp) 7 and driving ram 5 under working spring and the outer pressure and hydrostatic pressure effect of pipe during reverse stroke (at this moment hydrostatic pressure acts on the lower surface of work plunger by water absorption channel), the liquid that is positioned at driving ram 5 tops is squeezed go back to the face of land and is drilled the cylinder body of pump 37.Simultaneously, be full of the impact chamber 33 of anvil 3 tops through suction valve 13, promptly formed the suction circulation from the liquid of the pipe external space.Again to bottom offset, the liquid that anvil 3 tops is impacted chamber 33 is pressed to draining valve at the effect lower plunger 5 and 7 of follow-up waterpower pulse, and the plunger of working simultaneously (block stamp) 7 hits anvils 3.
Claims (6)
1. submersible pump formula hydraulic impacter, it is characterized in that: it comprises the reciprocal percussion mechanism of pulsation water pressure plunger, anvil (3), suction water device, lower contact (31), the bottom of the cylinder body (26) of the reciprocal percussion mechanism of pulsation water pressure plunger is connected with the top slipper seal of anvil (3), fixedlying connected with the upper end of the valve body (10) of suction water device in the bottom of anvil (3), fixedlys connected with the upper end of lower contact (31) in the lower end of the valve body (30) of suction water device; In the lower contact (31) is cavity, be provided with between the work plunger (7) of the reciprocal percussion mechanism of pulsation water pressure plunger and the anvil (3) and impact chamber (33), impact the stroke of chamber (33) axial dimension less than work plunger (7), have central passage (4) in the anvil (3), central passage (4) communicates with impact chamber (33), one end in the unidirectional suction road of suction water device communicates with central passage (4), the other end and valve body (10) are interlinked to the outside, one end in the one way entrapped water road of suction water device communicates with central passage (4), and the other end communicates with the cavity of lower contact (31).
2. submersible pump formula hydraulic impacter according to claim 1, it is characterized in that: the reciprocal percussion mechanism of described pulsation water pressure plunger comprises cylinder body (16), housing (21), cylindrical housing (1), cylinder body (26), working spring (19), driving ram (5), connecting rod (6), work plunger (7), upper support ring (18), lower support ring (20), globular hinge (32), have driving ram chamber (15) on the cylinder body (16), in the cylinder body (21) is the connecting rod chamber, the lower end of cylinder body (16) is connected with the upper end of housing (21), the lower end of housing (21) is connected with the upper end of cylindrical housing (1), and cylindrical housing (1) lower end is connected with the upper end of cylinder body (26); Driving ram (5) is positioned at driving ram chamber (15) driving ram (5) and has connecting rod (6), connecting rod (6) is positioned at the connecting rod chamber, the upper end of connecting rod (6) is with upper support ring (18), be with working spring (19) successively on the connecting rod (6) under the upper support ring (18), lower support ring (20), work plunger (7) is positioned at cylindrical housing (1), the lower end of connecting rod (6) is hinged with the upper end of work plunger (7) by globular hinge (32), the cavity of the lower end of work plunger (7) is for impacting chamber (33), the lower end of cylinder body (26) is interior projection interface, and the slipper seal that matches of the interior projection interface of cylinder body (26) and the upper grooves (2) of anvil (3) is connected.
3. submersible pump formula hydraulic impacter according to claim 2, it is characterized in that: be provided with sealing ring (17) between the driving ram (5) of the reciprocal percussion mechanism of described pulsation water pressure plunger and the cylinder body (16), sealing ring (17) is positioned at the seal groove on the cylinder body (16); Be provided with sealing ring (24) between work plunger (7) and the cylinder body (26), sealing ring (24) is positioned at the seal groove on the cylinder body (26); Be provided with sealing ring (27) between anvil (3) and the cylinder body (26), sealing ring (27) is positioned at the seal groove on the cylinder body (26).
4. submersible pump formula hydraulic impacter according to claim 2, it is characterized in that: have the water hole on the lower support ring (20) of the reciprocal percussion mechanism of described pulsation water pressure plunger, the water hole of lower support ring (20) communicates with the connecting rod chamber, work plunger (7) upper end has interconnection (22), interconnection (22) communicates with the water hole of lower support ring (20), have central passage (8) under the interconnection (22) of work plunger (7), central passage (8) upper end communicates with interconnection (22), central passage (8) lower end communicates with impact chamber (33), be provided with reversing valve (9) in the central passage (8), the lower end of reversing valve (9) is provided with the top spring, and the top spring is spacing ring (23) down.
5. submersible pump formula hydraulic impacter according to claim 1, it is characterized in that: described anvil (3) has central passage (4), central passage (4) communicates with impact chamber (33), the top of anvil (3) has groove (2), the axial footpath of groove (2) is greater than the axial footpath of interior projection of cylinder body (26), the slipper seal that matches of the interior projection interface of cylinder body (26) and the upper grooves of anvil (3) is connected, and the lower end of anvil (3) is connected with the upper end of valve body (10).
6. submersible pump formula hydraulic impacter according to claim 1, it is characterized in that: described suction water device comprises valve body (10), valve body (30), suction valve (13), outlet valve (14), the upper end of valve body (10) is connected with anvil (3) lower end, the lower end of valve body (10) is connected with the upper end of valve body (30), and the lower end of valve body (30) is connected with the upper end of lower contact (31); Valve body (10) is provided with unidirectional suction road, unidirectional suction road comprises horizontal channel (12), chamber (11), one end of horizontal channel (12) and valve body (10) exterior, the other end communicates with chamber (11), chamber (11) communicates with central passage (4), be provided with suction valve (13) in the chamber (11), suction valve (13) is gone up the top spring, is spacing ring (25) on the spring; Have limbers (28) on the valve body (10), have chamber (29) on the valve body (30), described one way entrapped water road comprises limbers (28), chamber (29), one end of limbers (28) communicates with central passage (4), the other end communicates with chamber (29), and chamber (29) communicates with the cavity of lower contact (31), is provided with outlet valve (14) in the chamber (29), outlet valve (14) top down has spring, and spring is spacing ring (34) down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410061053 CN1285824C (en) | 2004-11-08 | 2004-11-08 | Submersible pump type hydraulic impactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410061053 CN1285824C (en) | 2004-11-08 | 2004-11-08 | Submersible pump type hydraulic impactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1603569A true CN1603569A (en) | 2005-04-06 |
| CN1285824C CN1285824C (en) | 2006-11-22 |
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ID=34666379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410061053 Expired - Fee Related CN1285824C (en) | 2004-11-08 | 2004-11-08 | Submersible pump type hydraulic impactor |
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| CN (1) | CN1285824C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101189078B (en) * | 2005-06-22 | 2010-05-19 | 阿特拉斯科普科凿岩机股份公司 | Percussive device for a rock drilling machine, method for achieving a reciprocating percussive piston movement and rock drilling machine |
| CN102536114A (en) * | 2010-12-23 | 2012-07-04 | 中国石油大学(华东) | Mechanical underground vibration-absorption punching drilling tool |
| CN103061667A (en) * | 2012-03-08 | 2013-04-24 | 杨晓胤 | Water hammer type well drill |
| CN109872623A (en) * | 2019-03-02 | 2019-06-11 | 吉林省农业科学院 | A kind of potato field experiment Sign Board |
| CN112282712A (en) * | 2019-07-24 | 2021-01-29 | 中国石油天然气股份有限公司 | Underground reciprocating water injection device |
| CN112302590A (en) * | 2019-07-24 | 2021-02-02 | 中国石油天然气股份有限公司 | Underground pressurizing water injection device and method |
| CN114427342A (en) * | 2020-10-29 | 2022-05-03 | 中国石油天然气股份有限公司 | Drilling tool |
-
2004
- 2004-11-08 CN CN 200410061053 patent/CN1285824C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101189078B (en) * | 2005-06-22 | 2010-05-19 | 阿特拉斯科普科凿岩机股份公司 | Percussive device for a rock drilling machine, method for achieving a reciprocating percussive piston movement and rock drilling machine |
| CN102536114A (en) * | 2010-12-23 | 2012-07-04 | 中国石油大学(华东) | Mechanical underground vibration-absorption punching drilling tool |
| CN102536114B (en) * | 2010-12-23 | 2014-06-25 | 中国石油大学(华东) | Mechanical underground vibration-absorption punching drilling tool |
| CN103061667A (en) * | 2012-03-08 | 2013-04-24 | 杨晓胤 | Water hammer type well drill |
| CN103061667B (en) * | 2012-03-08 | 2015-05-13 | 杨晓胤 | Water hammer type well drill |
| CN109872623A (en) * | 2019-03-02 | 2019-06-11 | 吉林省农业科学院 | A kind of potato field experiment Sign Board |
| CN112282712A (en) * | 2019-07-24 | 2021-01-29 | 中国石油天然气股份有限公司 | Underground reciprocating water injection device |
| CN112302590A (en) * | 2019-07-24 | 2021-02-02 | 中国石油天然气股份有限公司 | Underground pressurizing water injection device and method |
| CN114427342A (en) * | 2020-10-29 | 2022-05-03 | 中国石油天然气股份有限公司 | Drilling tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1285824C (en) | 2006-11-22 |
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