CN202500494U - Jet bit for carrying out grouting consolidation on aggregate filled in formation cavity - Google Patents
Jet bit for carrying out grouting consolidation on aggregate filled in formation cavity Download PDFInfo
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- CN202500494U CN202500494U CN2012200272958U CN201220027295U CN202500494U CN 202500494 U CN202500494 U CN 202500494U CN 2012200272958 U CN2012200272958 U CN 2012200272958U CN 201220027295 U CN201220027295 U CN 201220027295U CN 202500494 U CN202500494 U CN 202500494U
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Abstract
The utility model discloses a jet bit for carrying out grouting consolidation on aggregate filled in a formation cavity. The jet bit is composed of an upper joint, a jet body and a drill bit body which are connected in order, wherein the upper joint is made of a drill rod male buckle joint, strip-shaped hard alloy pieces are welded on a cylindrical surface of the drill rod male buckle joint along an axis direction, the jet body is made of a drill rod female buckle joint, and the drill bit body is prepared through processing a round steel whose diameter is same with that of a drill rod joint. According to the utility model, a grouting consolidation operation is carried out on an aggregate accumulation body filled in the formation cavity, a concrete body is formed by the aggregate body and has certain strength and stability, which is equal to that a false formation is artificial constructed, that a borehole passes through the formation cavity smoothly is ensured, and a condition is created for safe and smooth construction of the borehole.
Description
Technical field
The utility model relates to and a kind of the aggregate of filling in the cavity, stratum is carried out the jet bit of grouting reinforcement, belongs to fields such as geological prospectings such as mine, traffic tunnel, water conservancy and hydropower, water damage control, infrastructure.
Background technology
At present, mine water damage accident especially coal mine flood accident is one of major accident that influences workers ' safety and mine economic benefit, and annual colliery water leak accident constantly takes place.Receiving seat earth Ordovician system limestone water to threaten more serious old mining area; Especially coal is organized in exploitation down; Formed the old mining area of coal seam goaf at last group of coal; Because of anti-harness the river need carry out the hydrology observation of seat earth aquifer, mine carries out grouting for water blocking to the water-filling aquifer after gushing gushing water, need carry out floor grouting before the seam mining that threatened by water and reinforce and transform, when the anti-draining in down-hole needs construction drainage boring or cable boring; Often surface drilling will pass group coal goaf, and the existence in goaf brings great difficulty to drilling construction; In the southern areas that the karst karst is grown, geological prospecting borehole often runs into bigger karst cavity.In these goafs and cavity, creep into the piece that often occurs caving in hole scattering accident, the cavity and cause that underground drilling accident, boring cause by the card accident in empty roof and floor dislocation, can not find original boring accident, boring and in the cavity, got rid of to take off the brill accident or disrance sleeve drill bit in empty occurs at empty top board kerve stick of tool accident, drilling rod and sweep and take off malicious event and flushing liquor is missed construction etc. fully.For reducing and stopping above-mentioned accident, need in the cavity, fill full aggregate sometimes and, artificially make false stratum, to guarantee the safe smooth construction of boring to aggregate accumulation body grouting reinforcement.In addition in some grouting for water blocking engineering, need be through surface drilling filler aggregate and the aggregate accumulation body carried out grouting reinforcement in crossing the water tunnel, stop that with interception the tunnel crosses water, guarantee the success of grouting for water blocking.
The utility model content
To above-mentioned prior art, the utility model provides a kind of the aggregate of filling in the cavity, stratum has been carried out the technology of grouting reinforcement and used jet bit.
The utility model is realized (with the aggregate accumulation body grouting reinforcement technology to filling in the coal mine gob is example, and other is identical to the technology that the aggregate of filling in the cavity, stratum carries out grouting reinforcement) through following technical scheme:
A kind of the aggregate of filling in the cavity, stratum is carried out the technology of grouting reinforcement, step is following:
(1) at first, according to the degree of depth of the following interface depth and the aggregate accumulation body upper surface in goaf, calculate the total length of required drilling rod (drill string that is formed by connecting single drilling rod); And calculate the radical of required single drilling rod; Choose the single drilling rod that can mate, sequence order, subsequent use; Then; Connect jet bit in the predetermined lower end that is positioned at the single drilling rod of lowermost end, and the single drilling rod order good, hang successively to be connected with elevator and wire rope and be lowered in the boring according to apolegamy; Drilling rod will be inserted in the rig gyrator, and the rotary torque of drilling rod is provided by rig;
(2) when jet bit during apart from aggregate accumulation body upper surface 1～1.5m place, stop to transfer drilling rod, the drilling rod upper end connects water swivel and high-pressure rubber pipe, is connected with grouting pump again, and this moment, drilling rod was still hung by elevator and wire rope;
(3) send electricity for the grouting pump switch, make the grouting pump running, grouting pump water filling in the grouting pipeline that forms by water swivel and high-pressure rubber pipe, drilling rod and jet bit, whether the inspection grouting pipeline is unimpeded;
(4) after water filling check grouting pipeline is unimpeded; Pour into liquid cement with grouting pump through grouting pipeline, cement sprays from jet bit, starts rig then; Drive drilling rod and jet bit revolution through the rig gyrator; And transfer drilling rod with elevator and wire rope boom hoisting, and jet bit slowly enters under the drilling rod action of gravity in the aggregate accumulation body, and liquid cement is diffusion towards periphery in the particles of aggregates space;
(5) keep the continuous revolution of drilling rod and jet bit and string is moving up and down, progressively move down extension,, and then carry rotating drilling rod drive jet bit slowly and move up up to the gob floor degree of depth (goaf falls bottom the cash) from aggregate accumulation body upper surface; This step is carried out repeatedly, when feel jet bit in aggregate accumulation body and goaf fall cash smooth and easy up and down do not have resistance after, the grouting reinforcement EO is called plain concrete by the fixed aggregate of cement;
(6) behind the grouting reinforcement EO; Rise to by cement 1～1.5m place more than the plain concrete upper surface after fixed to jet bit, stop to promote drilling rod, keep drilling rod motionless; In grouting pipeline, pump into a certain amount of clear water with grouting pump, residual cement in the flushing grouting pipeline;
(7) open the rig gyrator, promote drilling rod, the single drilling rod by root dismounting composition drilling rod proposes boring to all single drilling rods and jet bit at last.
The technical essential of above-mentioned technology have following some:
1. all screwed connection positions require to twine veil, last dope, and screw, drilling rod screw thread place drainage should not appear.
When 2. for the first time transferring drilling rod and jet bit; When the left and right sides, aggregate accumulation body upper surface 5m place; Slow down lowering velocity, when arriving, must stop to transfer drilling rod apart from aggregate accumulation body upper surface 1～1.5m place; It is too fast in the jet bit insertion aggregate accumulation body to prevent down brill, makes particles of aggregates stop up jet bit.
3. the rig gyrator must not stop revolution, and drilling rod and jet bit must not stop in the aggregate accumulation body, forbids drilling rod not turn round and the directly upwards powerful operation that promotes drilling rod, to prevent the card underground drilling accident.
4. according to the setting time of cement paste, the consolidation strength of the plain concrete of can following drill bit having a try is when the consolidation strength of plain concrete and stability satisfy within it construction drill and when not caving in piece, can continue to creep into downwards, otherwise carry out the grouting reinforcement operation again.
5. each machine-team all will propose drilling rod and jet bit to check outside the boring through elevator and wire rope in the construction, checks that it grinds situation, and the drilling rod and the jet bit of serious wear will in time be changed or keep in repair.
6. no matter adopt which type of grouting reinforcement material, the setting time that all must guarantee material can satisfy grouting operation to the needs of time, the phenomenon that cement solidifies in grouting pipeline must not occur.
7. slip casting finishes the notes clear water amount of back in grouting pipeline, is 3 times of grouting pipeline volume.
Above-mentioned technology requires as follows the preparation of coal seam goaf in-seam material accumulation body grouting material:
1. cement is generally selected PO.32 for use, 5R or PO.42, and 5R portland cement, cement slurry density generally are controlled at 1.4～1.6kg/cm
2, cement quality must be qualified.
2. must stir in the cement paste preparation, must not have caking and cement pimple to exist.
3. in cement paste, add water glass according to the ratio of volume ratio 0.3～0.5% in case of necessity, the back that stirs is sprayed by jet bit through grouting pipeline with the single fluid grouting pump, enters between the aggregate accumulation body particles of aggregates, mixes with particles of aggregates.
4. the grouting pump amount generally must not be greater than 100L/min.
5. drilling rod must not stop in boring in the slip casting, must not rest in the aggregate accumulation body.
A kind of the aggregate of filling in the cavity, stratum is carried out the used jet bit of grouting reinforcement; Comprise the top connection, ejectisome and the bit body that connect successively; Wherein, Top connection is made by the drilling rod male joint, at the periphery of drilling rod male joint along axis direction welding-on ribbon carbide alloy fragment; Ejectisome is made by drilling rod box joint; Spray-hole is evenly arranged at non-screw thread position on drilling rod box joint; Along the banded carbide alloy fragment of welding-on between drilling rod box joint axis direction, the adjacent spray-hole, banded carbide alloy fragment thickness is no less than 5mm; Bit body is processed by the round steel identical with the tool joint diameter; One end is processed into tool joint screw thread (pin thread); The other end radially welds some bit body fins (triangle fin) along end face; Along three seting welding carbide fragments of bit body fin hypotenuse, between axis direction, adjacent bit body fin, be provided with the some bit ports that communicate with spray-hole in the bit body end, bit port evenly distributes; Bit body screw thread part is connected with ejectisome.
The manufacturing technology main points of above-mentioned jet bit have following some:
1. carbide alloy fragment welding is ribbon and distributes, and strip width is about 10～20mm, the about 5～10mm of thickness, and select flexibly according on bit diameter, the bit body fin and bit body ring-type shoulder position space.
2. the carbide alloy fragment reclaims fragmentation by the useless drill bit of carbide alloy, and material is selected YG6 or YG8, and its welding procedure is identical with the carbide drill welding procedure, requires cemented carbide sintered body surface, welding position concordant, consistency of thickness.
3. top connection and be attached thereto the drilling rod screw thread that connects and be complementary.
4. the ribbon carbide alloy fragment that welds on top connection and the ejectisome should be consistent with bit body fin quantity, and bit body fin quantity can select to be processed into 3 or 4 or multi-disc more according to bit diameter.
5. spray-hole and bit port diameter are generally at 6～12mm.
6. the rotary track external diameter that connects back top connection, ejectisome and bit body is identical.
7. when the bit body diameter allows, can use block carbide alloy to replace the carbide alloy fragment.
8. the bit body diameter must not be greater than minimum boring aperture, and can be in boring smooth and easy passing.
The beneficial effect of the utility model is: the aggregate accumulation body that has solved preferably being filled in the cavity, stratum has carried out the grouting reinforcement operation; Make aggregate body formin concrete body; And had certain intensity and stability; Be equivalent to manual work and constructed false stratum, guaranteed to hole and passed the cavity, stratum smoothly, for the safe smooth construction of boring has been created condition.
Description of drawings
Fig. 1 carries out the operating procedure step schematic diagram (drilling rod pierces the aggregate accumulation body) of grouting reinforcement for the aggregate accumulation body of filling in coal mine gob.
Fig. 2 carries out the operating procedure step schematic diagram (drilling rod pierces the goaf) of grouting reinforcement for the aggregate accumulation body of filling in coal mine gob.
Fig. 3 is the structural representation of jet bit.
Fig. 4 be among Fig. 3 A to view.
Fig. 5 be among Fig. 3 B to view.
Wherein, 1, drilling rod gyratory directions; 2, the moving direction of rod string; 3, rig gyrator; 4, drilling rod; 5, cement paste flows in the drilling rod; 6, jet bit; 7, coal seam goaf space; 8, aggregate accumulation body; 9, coal seam; 10, the goaf cash that falls; 11, coal sub-surface; 12, cement paste diffuse seepage; 13, boring; 14, coal overlying strata; 15, water swivel and high-pressure rubber pipe; 16, elevator and wire rope; 17, top connection; 18, top connection fin; 19, ejectisome; 20, spray-hole; 21, bit port; 22, bit body; 23, bit body fin; 24, carbide alloy fragment.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
A kind of the aggregate of filling in the cavity, stratum is carried out the technology of grouting reinforcement, step is following:
(1) at first, according to the degree of depth of the following interface depth and aggregate accumulation body 8 upper surfaces in goaf, calculate the total length of required drilling rod 4 (drill string that is formed by connecting single drilling rod); And calculate the radical of required single drilling rod; Choose the single drilling rod that can mate, sequence order, subsequent use; Then; Connect jet bit 6 in the predetermined lower end that is positioned at the single drilling rod of lowermost end, and the single drilling rod order good, hang successively to be connected to be lowered into elevator and wire rope 16 and hole in 13 according to apolegamy; Drilling rod 4 will be inserted in the rig gyrator 3, and the rotary torque of drilling rod 4 is provided by rig;
(2) when jet bit 6 during apart from aggregate accumulation body 8 upper surfaces 1～1.5m place, stop to transfer drilling rod 4, drilling rod 4 upper ends connect water swivel and high-pressure rubber pipe 15, are connected with grouting pump again, and this moment, drilling rod 4 was still hung by elevator and wire rope 16;
(3) send electricity for the grouting pump switch, make the grouting pump running, grouting pump water filling in the grouting pipeline that forms by water swivel and high-pressure rubber pipe 15, drilling rod 4 and jet bit 6, whether the inspection grouting pipeline is unimpeded;
(4) after water filling check grouting pipeline is unimpeded, pour into liquid cement with grouting pump through grouting pipeline, cement is from the spray-hole 20 and bit port 21 ejections of jet bit 6; Start rig then; Drive drilling rod 4 and jet bit 6 revolutions through rig gyrator 3, and transfer drilling rod 4 with elevator and wire rope 16 boom hoistings, jet bit 6 slowly enters in the aggregate accumulation body 8 under drilling rod 4 actions of gravity; Liquid cement is diffusion towards periphery in the particles of aggregates space, and is as shown in Figure 1;
(5) keep the continuous revolution of drilling rod 4 and jet bit 6 and string up and down to move; Progressively move down extension from aggregate accumulation body 8 upper surfaces; Up to the gob floor degree of depth (goaf fall cash 10 bottoms), as shown in Figure 2, and then carry rotating drilling rod 4 slowly and drive jet bits 6 and move up; This step is carried out repeatedly, when feel jet bit 6 in aggregate accumulation body 8 and goaf fall cash 10 smooth and easy up and down do not have resistance after, the grouting reinforcement EO is called plain concrete by the fixed aggregate of cement;
(6) behind the grouting reinforcement EO; Rise to by cement 1～1.5m place more than the plain concrete upper surface after fixed to jet bit 6, stop to promote drilling rod 4, keep drilling rod 4 motionless; In grouting pipeline, pump into a certain amount of clear water with grouting pump, residual cement in the flushing grouting pipeline;
(7) open rig gyrator 3, promote drilling rod 4,, propose boring 13 to all single drilling rods and jet bit 6 at last by the single drilling rod of root dismounting composition drilling rod 4.
The technical essential of above-mentioned technology have following some:
2. 1 all screwed connection positions require to twine veil, last dope, and screw, drilling rod screw thread place drainage should not appear.
When 2. transferring for the first time drilling rod 4 with jet bit 6; When the left and right sides, aggregate accumulation body 8 upper surface 5m place; Slow down lowering velocity, when arriving, must stop to transfer drilling rod 4 apart from aggregate accumulation body 8 upper surfaces 1～1.5m place; It is too fast in the jet bit 6 insertion aggregate accumulation bodies 8 to prevent down brill, makes particles of aggregates stop up the bit port 21 of jet bit 6.
3. rig gyrator 3 must not stop revolution, and drilling rod 4 must not stop in aggregate accumulation body 8 with jet bit 6, forbids drilling rod 4 not turn round and the directly upwards powerful operation that promotes drilling rod 4, to prevent the card underground drilling accident.
4. according to the setting time of cement paste, the consolidation strength of the plain concrete of can following drill bit having a try is when the consolidation strength of plain concrete and stability satisfy within it construction drill and when not caving in piece, can continue to creep into downwards, otherwise carry out the grouting reinforcement operation again.
5. each machine-team all will propose boring 13 outer inspections to drilling rod 4 and jet bit 6 through elevator and wire rope 16 in the construction, checks that it grinds situation, and the drilling rod 4 and the jet bit 6 of serious wear will in time be changed or keep in repair.
6. no matter adopt which type of grouting reinforcement material, the setting time that all must guarantee material can satisfy grouting operation to the needs of time, the phenomenon that cement solidifies in grouting pipeline must not occur.
7. slip casting finishes the notes clear water amount of back in grouting pipeline, is 3 times of grouting pipeline volume.
Above-mentioned technology requires as follows the preparation of coal seam goaf in-seam material accumulation body grouting material:
1. cement is generally selected PO.32 for use, 5R or PO.42, and 5R portland cement, cement slurry density generally are controlled at 1.4～1.6kg/cm
2, cement quality must be qualified.
2. must stir in the cement paste preparation, must not have caking and cement pimple to exist.
3. in cement paste, add water glass according to the ratio of volume ratio 0.3～0.5% in case of necessity; Spray with bit port 21 through the spray-hole 204 of grouting pipeline with the single fluid grouting pump after stirring by jet bit 6; Enter between aggregate accumulation body 8 particless of aggregates, mix with particles of aggregates.
4. the grouting pump amount generally must not be greater than 100L/min.
5. drilling rod 4 must not stop in boring 13 in the slip casting, must not rest in the aggregate accumulation body 8.
A kind of the aggregate of filling in the cavity, stratum is carried out the used jet bit of grouting reinforcement; Comprise the top connection 17, ejectisome 19 and the bit body 22 that connect successively; Like Fig. 3,4, shown in 5; Wherein, top connection 17 is made by the drilling rod male joint, at the periphery of drilling rod male joint along axis direction welding-on ribbon carbide alloy fragment 24; Ejectisome 19 is made by drilling rod box joint; Spray-hole 20 is evenly arranged at non-screw thread position on drilling rod box joint; Along the banded carbide alloy fragment 24 of welding-on between drilling rod box joint axis direction, the adjacent spray-hole 20, banded carbide alloy fragment 24 thickness are no less than 5mm; Bit body 22 is processed by the round steel identical with the tool joint diameter; One end is processed into tool joint screw thread (pin thread); The other end radially welds some bit body fins 23 (triangle fin) along end face; Along three seting welding carbide fragments 24 of bit body fin 23 hypotenuses, between axis direction, adjacent bit body fin 23, be provided with the some bit ports 21 that communicate with spray-hole 19 in bit body 22 ends, bit port 21 evenly distributes; Bit body 22 screw threads part is connected with ejectisome 19.
The manufacturing technology main points of above-mentioned jet bit have following some:
1. carbide alloy fragment 24 welding is ribbon and distributes, and strip width is about 10～20mm, the about 5～10mm of thickness, and select flexibly according on bit diameter, the bit body fin 23 and bit body 22 ring-type shoulder position spaces.
2. carbide alloy fragment 24 reclaims fragmentation by the useless drill bit of carbide alloy, and material is selected YG6 or YG8, and its welding procedure is identical with the carbide drill welding procedure, requires cemented carbide sintered body surface, welding position concordant, consistency of thickness.
3. top connection 17 be attached thereto the drilling rod screw thread that connects and should be complementary.
4. the ribbon carbide alloy fragment 24 of welding should be consistent with bit body fin 23 quantity on top connection 17 and the ejectisome 19, and bit body fin 23 quantity can be processed into 3 or 4 or multi-disc more according to the bit diameter selection.
5. spray-hole 19 and bit port 21 diameters are generally at 6～12mm.
6. the rotary track external diameter that connects back top connection 17, ejectisome 19 and bit body 22 is identical.
7. when bit body 22 diameters allow, can use block carbide alloy to replace carbide alloy fragment 24.
8. bit body 22 diameters must not be greater than minimum boring aperture, and can be in boring smooth and easy passing.
Embodiment:
8: 30 on the 1st July in 2006, during 10404 (2) the work planes extrapolation 40m of Jinan China rose mining industry Co., Ltd, water outlet takes place.July night shift projective water point on the 5th water yield 2601m
3/ h, and the trend that continues increase is arranged, flood the mine north wing and caused the northern wing to stop production.To 10 layers of coal water outlet situation, formulated from the water blockoff scheme of ground construction grouting for water blocking boring.But analyze according to the work plane hydrogeologic data, 4 borings of design wherein have 2 borings (annotate 1, annotate 4) will pass coal 8, coal 9 and 10 3 layers of goaf of coal respectively, and 1 boring (annotating 3) will be passed coal 8, coal 9 two-layer goafs.Practice of construction three borings, for annotating 1, annotating 3 and annotate 4.
Circle, the end degree of depth and the thickness in coal seam, three layers of goaf are respectively: coal 8 degree of depth 205.22m, thickness 1.92m; Coal 9: degree of depth 210.70m, thickness 1.40m; Coal 10 degree of depth 218.60m, thickness 1.80m.Coal 8, coal 9 and coal 10 3 interlamellar spacings of wherein annotate 1, annotate 3, annotating 4 boring exposure are respectively 3.75m and 6.63m than normal separation attenuation.Because coal 8, coal 9,10 3 layers of goaf spacing of coal are very little, mining way adopts the roof collapse mode.If coal 10 roof collapse bands have extended to coal 9 goafs, then can regard coal 9, coal 10 goafs as one deck goaf and treat.Thereby three layers of goaf have formed bigger inbreak space.How safety is passed coal mine gob smoothly in boring, is one of several keys of grouting for water blocking success or not.
Utilized the utility model process implementing to the grouting reinforcement of goaf in-seam material accumulation body.Through annotating 1, annotating 3 and annotate borings such as 4, the aggregate accumulation body of filling in the goaf has been carried out grouting reinforcement, 5.4 tons of shared PO.32.5R Portland cements respectively.Fixed quality meets the requirements, and has guaranteed to hole in induration, to creep into, and has accomplished the safe smooth construction of boring, and work has brought big benefit to water blockoff.First boring on October 17th, 2006 annotate No. 3 hole safety pass smoothly in the Ordovician system limestone of water-filling aquifer, inject 150 tons of cement behind the coal mine gob after, water blockoff first meeting effect, water blockoff work on December 16 brings to a happy ending.
Claims (3)
1. jet bit that the aggregate of filling in the cavity, stratum is carried out grouting reinforcement; It is characterized in that: comprise the top connection, ejectisome and the bit body that connect successively; Wherein, Top connection is made by the drilling rod male joint, at the periphery of drilling rod male joint along axis direction welding-on ribbon carbide alloy fragment; Ejectisome is made by drilling rod box joint; Spray-hole is evenly arranged at non-screw thread position on drilling rod box joint; Along the banded carbide alloy fragment of welding-on between drilling rod box joint axis direction, the adjacent spray-hole, banded carbide alloy fragment thickness is no less than 5mm; Bit body is processed by the round steel identical with the tool joint diameter; One end is processed into the tool joint screw thread; The other end radially welds some bit body fins along end face; Along three seting welding carbide fragments of bit body fin hypotenuse, between axis direction, adjacent bit body fin, be provided with the some bit ports that communicate with spray-hole in the bit body end, bit port evenly distributes; Bit body screw thread part is connected with ejectisome.
2. a kind of jet bit that the aggregate of filling in the cavity, stratum is carried out grouting reinforcement according to claim 1; It is characterized in that: the ribbon carbide alloy fragment that welds on said top connection and the ejectisome is consistent with bit body fin quantity, and bit body fin quantity is 3 or 4.
3. according to claim 1ly a kind of the aggregate of filling in the cavity, stratum is carried out the jet bit of grouting reinforcement, it is characterized in that: said bit port diameter is at 6～12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200272958U CN202500494U (en) | 2012-01-20 | 2012-01-20 | Jet bit for carrying out grouting consolidation on aggregate filled in formation cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200272958U CN202500494U (en) | 2012-01-20 | 2012-01-20 | Jet bit for carrying out grouting consolidation on aggregate filled in formation cavity |
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| Publication Number | Publication Date |
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| CN202500494U true CN202500494U (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200272958U Expired - Fee Related CN202500494U (en) | 2012-01-20 | 2012-01-20 | Jet bit for carrying out grouting consolidation on aggregate filled in formation cavity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561950A (en) * | 2012-01-20 | 2012-07-11 | 山东大学 | Process for realizing grouting consolidation for aggregates filled in cavities of strata and jetting drill bit |
| CN109372431A (en) * | 2018-11-07 | 2019-02-22 | 广州海洋地质调查局 | One kind can continuous deflecting jet bit |
-
2012
- 2012-01-20 CN CN2012200272958U patent/CN202500494U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561950A (en) * | 2012-01-20 | 2012-07-11 | 山东大学 | Process for realizing grouting consolidation for aggregates filled in cavities of strata and jetting drill bit |
| CN109372431A (en) * | 2018-11-07 | 2019-02-22 | 广州海洋地质调查局 | One kind can continuous deflecting jet bit |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20121024 Termination date: 20150120 |
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| EXPY | Termination of patent right or utility model |