CN104499946A - Umbrella reamer bit assembly - Google Patents
Umbrella reamer bit assembly Download PDFInfo
- Publication number
- CN104499946A CN104499946A CN201410805893.7A CN201410805893A CN104499946A CN 104499946 A CN104499946 A CN 104499946A CN 201410805893 A CN201410805893 A CN 201410805893A CN 104499946 A CN104499946 A CN 104499946A
- Authority
- CN
- China
- Prior art keywords
- water vat
- mandrel
- umbrella
- tongue
- water
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 99
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 3
- 230000008602 contraction Effects 0.000 abstract 1
- 230000003068 static effect Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
- E21B10/322—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools cutter shifted by fluid pressure
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to an umbrella reamer bit assembly comprising a water cylinder. A hollow mandrel is fitted in the water cylinder. The water cylinder is provided with a limiter which limits axial motion of the mandrel. The two ends of the mandrel are connected with an inner connector and a bit, respectively. The water cylinder is provided with an outer connector surrounding the inner connector. At least two reamer arms are hinged to the outer wall of the water cylinder. Each reamer arm is hinged to the bit through a connecting rod. A cylinder rod is slidably fitted in the water cylinder. A water cavity is formed among one end, corresponding to the bit, of the cylinder rod, the mandrel and the water cylinder. The water cavity is communicated with the outer connector through a water passage arranged in the water cylinder. A cylinder rod return spring is disposed between one end, corresponding to the inner connector, of the cylinder rod and the water cylinder. The cylinder rod is provided with an unlocking mechanism which opens the limiter. The umbrella reamer bit assembly has drilling and reaming functions, has a large contraction angle adjusting range, is capable of evenly bearing stress, high in structural strength and simple in structure and can meet the requirements on drilling and reaming.
Description
Technical field
The present invention relates to the static pile press for building operations building site, specifically a kind of umbrella-type reaming bit being used for pile sinking reaming when static pile press piling.
Background technology
Static pile press refers to a kind of piling machinery construction equipment utilizing static pressure stake to be pressed into stratum, and it is applicable to Soft Soil Layer piling engineering, and the stake work as underground railway, harbour, bridge, reservoir power station, offshore production platform and defence construction etc. is constructed.
When traditional static pile press is constructed, the downward silent piling of direct pile holding, does not hole, reaming, and its shortcoming is: to the soil layer piling difficulty of sand bed, hardpan, differentiation layer and some not easily pilings, even under some geological conditions, traditional static pile press cannot carry out piling work.
Summary of the invention
The present invention is directed to the problems referred to above, provide a kind of umbrella-type reaming bit, this reaming bit can be entered by stake endoporus at need in static pile press piling and carry out holing and ream operation, expands the scope of application of static pile press.
According to technical scheme of the present invention: a kind of umbrella-type reaming bit, comprise the water vat body with internal closed space, in described water vat body, slipper seal is combined with the hollow mandrel running through described enclosure space, described water vat body is provided with the stopping means that the described mandrel of restriction moves axially; The two ends of described mandrel are connected to spigot and drill bit, described spigot with described drill bit offers respectively the through hole be connected with the hollow hole of described mandrel; Described water vat body is provided with the socket around described spigot; The outer wall of described water vat body is hinged with the uniform reamer arm of at least two circumferences, each described reamer arm is hinged respectively by connecting rod and described drill bit;
The water vat bar be sleeved on outside described mandrel is sliding combined with in the enclosure space of described water vat body; Form water cavity between one end that described water vat bar is corresponding with described drill bit and described water vat body and described mandrel, described water cavity is connected with described socket by the water channel be arranged in described water vat body; Water vat bar back-moving spring is provided with between one end that described water vat bar is corresponding with described spigot and described water vat body; Described water vat bar is provided with and opens described stopping means and drive the release mechanism that described mandrel moves axially.
Described reamer arm and/or described connecting rod are furnished with brill tooth.
Described water vat body comprises the rear casing and front casing that are mutually permanently connected, and the rear end of described rear casing is connected with end cap, and the front end of described front casing is connected with seal cover.
Described stopping means comprises tongue back-moving spring and tongue, described water vat body is provided with spacing room, described tongue can be arranged on described spacing indoor with radially sliding, and the outward opening of described spacing room is fixed with cover plate, and described tongue back-moving spring is arranged between described cover plate and described tongue.
Described spacing room has two, is arranged symmetrically on described rear casing.
Described tongue is provided with gathering sill, described rear casing is provided with the screw matched with described gathering sill.
The footpath of described tongue is provided with the blind hole holding described tongue back-moving spring to the back-end.
The radial front end of described tongue is provided with the deep-slotted chip breaker matched with described mandrel outer surface.
The radial front end of described tongue is provided with the first groove, described mandrel is provided with the projection with described first fit depressions.
Described release mechanism comprises the second inclined-plane and the second groove that are arranged on described water vat bar the inner, the radial front end of described tongue is provided with the first inclined-plane, described second inclined-plane and described first slopes which match, described second groove matches with the projection on described mandrel.
Technique effect of the present invention is: the present invention integrates drilling function and hole expansion function, has converging angles scope of compromise large, stressed equal power, and structural strength is large, and the simple feature of structure, can meet the requirement of various boring, reaming.Static pile press of the present invention is installed, can be entered by stake endoporus at need in piling and carry out holing and ream operation, expand the scope of application of static pile press.
Accompanying drawing explanation
Fig. 1 is structural representation front view of the present invention.
Fig. 2 is the vertical view cutaway drawing of Fig. 1.
Fig. 3 is the schematic diagram that reamer arm in Fig. 2 is in open configuration.
Fig. 4 is perspective view of the present invention.
Fig. 5 is the structural representation that the present invention is in using state.
Fig. 6 is the structural representation of the rear casing in the present invention.
Fig. 7 is the A-A sectional view in Fig. 6.
Fig. 8 is the structural representation front view of the tongue in the present invention.
Fig. 9 is the left view of Fig. 8.
Figure 10 is the top view of Fig. 8.
Figure 11 is the stereogram of Fig. 8.
Figure 12 is the structural representation front view of the mandrel in the present invention.
Figure 13 is the left view of Figure 12.
Figure 14 is the structural representation front view of the water vat bar in the present invention.
Figure 15 is the left view of Figure 14.
Figure 16 is the stereogram of Figure 14.
In Fig. 1 ~ Figure 16, comprise socket 1, spigot 2, seal cover 3, rear casing 4, tongue back-moving spring 5, cover plate 6, tongue 7, water vat bar 8, water vat bar back-moving spring 9, mandrel 10, front casing 11, reamer arm 12, end cap 13, connecting rod 14, drill bit 15, bore tooth 16, water cavity 17, water channel 18, water vat body 19, enclosure space 20, stopping means 21, through hole 22, double-wall drill pipe 23, unit head 24, mud water channel 25, spacing room 26, blind hole 27, gathering sill 28, first groove 29, first inclined-plane 30, deep-slotted chip breaker 31, protruding 32, second inclined-plane 33, second groove 34, screw 35, water vat controls water channel 36 etc.
Detailed description of the invention
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
As shown in Figure 1 to 4, the present invention is a kind of umbrella-type reaming bit, comprises water vat body 19 and drill bit 15.
Water vat body 19 has internal closed space 20.Water vat body 19 comprises the rear casing 4 and front casing 11 that are mutually permanently connected, and the rear end of rear casing 4 is connected with end cap 13, and the front end of front casing 11 is connected with seal cover 3.Enclosure space 20 is surrounded by end cap 13, rear casing 4, front casing 11 and seal cover 3.The rear end of rear casing 4 is connected with socket 1.
In water vat body 19, slipper seal is combined with the hollow mandrel 10 running through its enclosure space 20, and the two ends of hollow mandrel 10 are each passed through end cap 13 and seal cover 3.The two ends of mandrel 10 are connected to spigot 2 and drill bit 15, and spigot 2 is positioned at rear end, and drill bit 15 is positioned at front end; Spigot 2 with drill bit 15 offers respectively the through hole 22 be connected with the hollow hole of mandrel 10.Socket 1 on water vat body 19 is looped around spigot 2 around.
The outer wall of the front casing 11 of water vat body 19 is hinged with the reamer arm 12 that at least two (in the present embodiment being three) circumference is uniform, each reamer arm 12 is hinged respectively by connecting rod 14 and drill bit 15.Reamer arm 12 and/or connecting rod 14 are furnished with brill tooth 16.
The water vat bar 8 be sleeved on outside mandrel 10 is sliding combined with in the enclosure space 20 of water vat body 19.Form water cavity 17 between one end that water vat bar 8 is corresponding with drill bit 15 and water vat body 19 and mandrel 10, water cavity 17 is connected with socket 1 by the water channel 18 be arranged in water vat body 19; Water vat bar back-moving spring 9 is provided with between one end that water vat bar 8 is corresponding with spigot 2 and water vat body 19.
Water vat body 19 is provided with the stopping means 21 that restriction mandrel 10 moves axially; Water vat bar 8 is provided with and opens stopping means 21 and the release mechanism moved axially with moving mandrel 10.
Stopping means 21 comprises tongue back-moving spring 5 and tongue 7.Water vat body 19 is provided with spacing room 26, as shown in Figure 6, Figure 7, spacing room 26 has two, is arranged symmetrically on rear casing 4, and corresponding stopping means 21 has two covers.
Tongue 7 can be arranged in spacing room 26 with radially sliding.As shown in Fig. 8 ~ Figure 11, tongue 7 is provided with gathering sill 28, as shown in Figure 6, Figure 7, rear casing 4 is provided with the screw 35 matched with gathering sill 28.Tongue 7 is slided and moving radially along rear casing 4 on screw 35 by its gathering sill 28.
The outward opening of spacing room 26 is fixed with cover plate 6, and tongue back-moving spring 5 is arranged between cover plate 6 and tongue 7.As shown in Fig. 8 ~ Figure 11, the footpath of tongue 7 is also provided with the blind hole 27 holding tongue back-moving spring 5 to the back-end.
As shown in Fig. 8 ~ Figure 11, the radial front end of tongue 7 is also provided with the deep-slotted chip breaker 31 matched with mandrel 10 external surface.The effect arranging deep-slotted chip breaker 31 is the contact area increasing tongue 7 and mandrel 10, thus increasing friction force.The radial front end of tongue 7 is also provided with the first groove 29, mandrel 10 is provided with the projection 32 matched with the first groove 29.Protruding 32 combine with the first groove 29, play better limitation locking effect.
As shown in Figure 12 ~ Figure 16, release mechanism comprises the second inclined-plane 33 and the second groove 34 being arranged on water vat bar 8 the inner, the radial front end of tongue 7 is provided with the first inclined-plane, inclined-plane 30, second 33 and the first inclined-plane 30 matches, and the second groove 34 matches with the projection 32 on mandrel 10.
Operating principle of the present invention and the course of work as follows:
As shown in Figure 5, when the present invention works, be connected with double-wall drill pipe 23 by button-type, the socket 1 of reaming bit is connected with the outer wall of double-wall drill pipe 23, and the spigot 2 of reaming bit is connected with the inwall of double-wall drill pipe 23.Double-wall drill pipe 23 is connected to unit head 24 times, and the water vat in unit head 24 is controlled water channel 36 and is connected with the water channel 18 of reaming bit by the outer wall of double-wall drill pipe 23; Mud water channel 25 in unit head 24 is connected with the through hole 22 on drill bit 15 by the hollow hole on the inwall of double-wall drill pipe 23 and the mandrel 10 of reaming bit.
Reaming bit shown in Fig. 5 is in the state that reamer arm 12 is not opened, and under this state, water vat controls do not have water in water channel 36, does not namely have pressure.At this moment the projection 32 on mandrel 10 can be blocked by the first groove 29 on tongue 7, and mandrel 10 cannot move up, so reamer arm 12 cannot be opened.
When reaming bit opened by needs, control water channel 36 with water pump to water vat to add water, water flow in the water cavity 17 bottom water vat bar 8 by the water channel 18 in water vat body 19, when the pressure in water cavity 17 rises to 1MPa, the resistance that water vat bar 8 overcomes water vat bar back-moving spring 9 moves up, the second inclined-plane 33 on water vat bar 8 contacts with the first inclined-plane 30 on tongue 7, and tongue 7 is outwards moved back; When water vat bar 8 rises to a certain degree, the second groove 34 on water vat bar 8 contacts with the projection 32 on mandrel 10, mandrel 10 is driven and moves upward, mandrel 10 drives drill bit 15 to move upward simultaneously, by connecting rod 14, reamer arm 12 is opened, thus open reaming bit, and reaming bit flare up umbrella, as shown in Figure 3.
When drill bit complete after reaming state need reamer arm 12 to pack up time, the hydraulic pressure that only water vat need be controlled water channel 36 eliminates (namely not toward water channel pump water), after there is no the pressure of water in water cavity 17 now bottom water vat bar 8, water vat bar 8 can at the moved downward of water vat bar back-moving spring 9, therefore mandrel 10 also can move downward, thus drive reamer arm 12 to pack up, at this moment reaming bit also just becomes deflated state.
It is large that the present invention has converging angles scope of compromise, stressed equal power, and structural strength is large, and the simple feature of structure, can meet the requirement of various boring, reaming, can complete first aperture after arrival requires the degree of depth, then bore the requirement of macropore.Static pile press of the present invention is installed, can be entered by stake endoporus at need in piling and carry out holing and ream operation, make traditional silent piling function be applied in the occasion of not easily piling, expand the scope of application of static pile press.
Above to invention has been the enough detailed description with certain particularity.Belonging to those of ordinary skill in field should be appreciated that, the description in embodiment is only exemplary, make under the prerequisite not departing from true spirit of the present invention and scope change and all should belong to protection scope of the present invention.The present invention's scope required for protection is undertaken limiting by described claims, instead of limited by the foregoing description in embodiment.
Claims (10)
1. a umbrella-type reaming bit, it is characterized in that: comprise the water vat body (19) with internal closed space (20), in described water vat body (19), slipper seal is combined with the hollow mandrel (10) running through described enclosure space (20), described water vat body (19) is provided with the stopping means (21) that the described mandrel of restriction (10) moves axially; The two ends of described mandrel (10) are connected to spigot (2) and drill bit (15), described spigot (2) with described drill bit (15) offers respectively the through hole (22) be connected with the hollow hole of described mandrel (10); Described water vat body (19) is provided with the socket (1) around described spigot (2); The outer wall of described water vat body (19) is hinged with the reamer arm (12) that at least two circumferences are uniform, each described reamer arm (12) is hinged respectively by connecting rod (14) and described drill bit (15);
Be sliding combined with in the enclosure space (20) of described water vat body (19) and be sleeved on described mandrel (10) water vat bar (8) outward; Form water cavity (17) between one end that described water vat bar (8) is corresponding with described drill bit (15) and described water vat body (19) and described mandrel (10), described water cavity (17) is connected with described socket (1) by the water channel (18) be arranged in described water vat body (19); Water vat bar back-moving spring (9) is provided with between one end that described water vat bar (8) is corresponding with described spigot (2) and described water vat body (19); Described water vat bar (8) is provided with and opens described stopping means (21) and drive the release mechanism that described mandrel (10) moves axially.
2. according to umbrella-type reaming bit according to claim 1, it is characterized in that: described reamer arm (12) and/or described connecting rod (14) are furnished with brill tooth (16).
3. according to umbrella-type reaming bit according to claim 1, it is characterized in that: described water vat body (19) comprises the rear casing (4) and front casing (11) that are mutually permanently connected, the rear end of described rear casing (4) is connected with end cap (13), and the front end of described front casing (11) is connected with seal cover (3).
4. according to umbrella-type reaming bit according to claim 1, it is characterized in that: described stopping means (21) comprises tongue back-moving spring (5) and tongue (7), described water vat body (19) is provided with spacing room (26), described tongue (7) can be arranged in described spacing room (26) with radially sliding, the outward opening of described spacing room (26) is fixed with cover plate (6), and described tongue back-moving spring (5) is arranged between described cover plate (6) and described tongue (7).
5. according to umbrella-type reaming bit according to claim 4, it is characterized in that: described spacing room (26) has two, is arranged symmetrically on described rear casing (4).
6. according to umbrella-type reaming bit according to claim 4, it is characterized in that: described tongue (7) is provided with gathering sill (28), described rear casing (4) is provided with the screw matched with described gathering sill (28).
7. according to umbrella-type reaming bit according to claim 4, it is characterized in that: the footpath of described tongue (7) is provided with the blind hole (27) holding described tongue back-moving spring (5) to the back-end.
8. according to umbrella-type reaming bit according to claim 4, it is characterized in that: the radial front end of described tongue (7) is provided with the deep-slotted chip breaker (31) matched with described mandrel (10) external surface.
9. according to umbrella-type reaming bit according to claim 4, it is characterized in that: the radial front end of described tongue (7) is provided with the first groove (29), described mandrel (10) is provided with the projection (32) matched with described first groove (29).
10. according to umbrella-type reaming bit according to claim 9, it is characterized in that: described release mechanism comprises the second inclined-plane (33) and the second groove (34) that are arranged on described water vat bar (8) the inner, the radial front end of described tongue (7) is provided with the first inclined-plane (30), described second inclined-plane (33) and described first inclined-plane (30) match, and described second groove (34) is matched with the projection (32) on described mandrel (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410805893.7A CN104499946B (en) | 2014-12-22 | 2014-12-22 | Umbrella-type reaming bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410805893.7A CN104499946B (en) | 2014-12-22 | 2014-12-22 | Umbrella-type reaming bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104499946A true CN104499946A (en) | 2015-04-08 |
| CN104499946B CN104499946B (en) | 2016-09-14 |
Family
ID=52941387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410805893.7A Active CN104499946B (en) | 2014-12-22 | 2014-12-22 | Umbrella-type reaming bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104499946B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863515A (en) * | 2015-06-11 | 2015-08-26 | 鞍山紫竹工程设备制造有限公司 | Rock breaking drill bit applied to hydraulic multifunctional pile driver |
| CN105156034A (en) * | 2014-12-22 | 2015-12-16 | 江苏谷登工程机械装备有限公司 | Drill bit |
| CN105781424A (en) * | 2016-05-03 | 2016-07-20 | 周兆弟 | Variable-diameter drilling bit mechanism for drill stem |
| CN109296312A (en) * | 2018-09-20 | 2019-02-01 | 张家俊 | A kind of fast drilling method of sampling hole used for geological prospecting |
| CN109630022A (en) * | 2019-02-19 | 2019-04-16 | 江苏汉威重工科技有限公司 | A kind of composite drill bit |
| US20210301597A1 (en) * | 2020-03-26 | 2021-09-30 | Saudi Arabian Oil Company | Deploying Material to Limit Losses of Drilling Fluid in a Wellbore |
| US11454071B2 (en) | 2020-03-26 | 2022-09-27 | Saudi Arabian Oil Company | Deploying material to limit losses of drilling fluid in a wellbore |
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| US4893675A (en) * | 1988-11-21 | 1990-01-16 | Uvon Skipper | Section milling tool |
| US20030183424A1 (en) * | 2000-04-25 | 2003-10-02 | Tulloch Rory Mccrae | Expandable bit |
| CN2653113Y (en) * | 2003-06-25 | 2004-11-03 | 胜利石油管理局钻井工艺研究院 | Hydraulic expansion type PDC hole expander |
| CN1717528A (en) * | 2003-04-11 | 2006-01-04 | V.D.沙申娜“塔特奈夫特”股份公司 | Well reamer |
| CN103967418A (en) * | 2014-05-05 | 2014-08-06 | 天地科技股份有限公司 | Reamer bit and anchoring method for anchor rod |
-
2014
- 2014-12-22 CN CN201410805893.7A patent/CN104499946B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4893675A (en) * | 1988-11-21 | 1990-01-16 | Uvon Skipper | Section milling tool |
| US20030183424A1 (en) * | 2000-04-25 | 2003-10-02 | Tulloch Rory Mccrae | Expandable bit |
| CN1717528A (en) * | 2003-04-11 | 2006-01-04 | V.D.沙申娜“塔特奈夫特”股份公司 | Well reamer |
| CN2653113Y (en) * | 2003-06-25 | 2004-11-03 | 胜利石油管理局钻井工艺研究院 | Hydraulic expansion type PDC hole expander |
| CN103967418A (en) * | 2014-05-05 | 2014-08-06 | 天地科技股份有限公司 | Reamer bit and anchoring method for anchor rod |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156034A (en) * | 2014-12-22 | 2015-12-16 | 江苏谷登工程机械装备有限公司 | Drill bit |
| CN104863515A (en) * | 2015-06-11 | 2015-08-26 | 鞍山紫竹工程设备制造有限公司 | Rock breaking drill bit applied to hydraulic multifunctional pile driver |
| CN105781424A (en) * | 2016-05-03 | 2016-07-20 | 周兆弟 | Variable-diameter drilling bit mechanism for drill stem |
| CN109296312A (en) * | 2018-09-20 | 2019-02-01 | 张家俊 | A kind of fast drilling method of sampling hole used for geological prospecting |
| CN109630022A (en) * | 2019-02-19 | 2019-04-16 | 江苏汉威重工科技有限公司 | A kind of composite drill bit |
| CN109630022B (en) * | 2019-02-19 | 2019-09-06 | 江苏汉威重工科技有限公司 | A kind of composite drill bit |
| US20210301597A1 (en) * | 2020-03-26 | 2021-09-30 | Saudi Arabian Oil Company | Deploying Material to Limit Losses of Drilling Fluid in a Wellbore |
| US11454071B2 (en) | 2020-03-26 | 2022-09-27 | Saudi Arabian Oil Company | Deploying material to limit losses of drilling fluid in a wellbore |
| US11643878B2 (en) * | 2020-03-26 | 2023-05-09 | Saudi Arabian Oil Company | Deploying material to limit losses of drilling fluid in a wellbore |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104499946B (en) | 2016-09-14 |
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Effective date of registration: 20211022 Address after: 224100 south of Weisan Road, Dafeng Development Zone, Yancheng City, Jiangsu Province Patentee after: JIANGSU GUDENG HEAVY MACHINERY EQUIPMENT TECHNOLOGY Co.,Ltd. Address before: 224100 north side of Jianshe West Road, Dafeng Industrial Park, Dafeng Changzhou high tech Zone, Yancheng City, Jiangsu Province Patentee before: JIANGSU GOODENG ENGINEERING MACHINERY ASSEMBLING Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 224100 south of Weisan Road, Dafeng Development Zone, Yancheng City, Jiangsu Province Patentee after: Jiangsu Gudeng Heavy Machinery Technology Co.,Ltd. Address before: 224100 south of Weisan Road, Dafeng Development Zone, Yancheng City, Jiangsu Province Patentee before: JIANGSU GUDENG HEAVY MACHINERY EQUIPMENT TECHNOLOGY Co.,Ltd. |