CN107246249A - Cage shell type drilling leakage blockage device and drilling leakage blockage method - Google Patents
Cage shell type drilling leakage blockage device and drilling leakage blockage method Download PDFInfo
- Publication number
- CN107246249A CN107246249A CN201710665100.XA CN201710665100A CN107246249A CN 107246249 A CN107246249 A CN 107246249A CN 201710665100 A CN201710665100 A CN 201710665100A CN 107246249 A CN107246249 A CN 107246249A
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- cage
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- expansion sleeve
- section
- oil pipe
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- 238000005553 drilling Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 37
- 239000004568 cement Substances 0.000 claims abstract description 12
- 238000007711 solidification Methods 0.000 claims abstract description 5
- 230000008023 solidification Effects 0.000 claims abstract description 5
- 230000000903 blocking effect Effects 0.000 claims description 6
- 230000006978 adaptation Effects 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000000243 solution Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 239000003208 petroleum Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012224 working solution 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (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 discloses a kind of cage shell type drilling leakage blockage device and drilling leakage blockage method, it is related to petroleum drilling technology field, the technical problem of solution is to provide a kind of cage shell type drilling leakage blockage device and drilling leakage blockage method for improving drilling leakage blockage success rate.The technical solution adopted by the present invention is：Cage shell type drilling leakage blockage device, including continuous little oil pipe, expansion sleeve, cage set and sealing shroud, continuous little oil pipe are connected with expansion sleeve；Cage set includes cage post and clamp ring, and the two ends of clamp ring set ratchet, ratchet and clamp respectively, and ratchet and pawl makes clamp ring to swell；Sealing shroud is placed on cage set outside, and expansion sleeve is located in cage set.Expanded using the gas injection of expansion sleeve, whole cage set be suspended on continuous little oil pipe, then under be sent to the leak stopping point of drilling well；Expansion sleeve continues gas injection, and cage set and sealing shroud locking repairing are expanded on section cylindrical shaft wall；Taken out after expansion sleeve exhaust, cement leak stopping solidification finally is carried out to leakage section, due to having been improved at leak stopping, leak stopping success rate is improved.
Description
Technical field
The present invention relates to petroleum drilling technology field, especially a kind of cage shell type drilling leakage blockage device and drilling leakage blockage side
Method.
Background technology
In drilling engineering, leakage is the phenomenon that drilling fluid leaks into stratum from well.Leakage often occur in drilling process or
During person makes a trip, the challenge for be generally existing during oil-gas drilling, frequently encountering.Well caused by leakage
Lower accident is complicated, very harmful to drilling well, completion construction, is always the problem of domestic and international petroleum works circle are paid special attention to.
In drillng operation, once occurring leakage, not only the delay time at stop, drilling fluid is lost, damage oil-gas Layer, interference geology record
Well works, but also may cause borehole well instability, causes a series of complex such as well slough, bit freezing, blowout situation and accident, or even lead
Cause well to scrap, cause great economic loss.When leakage occurs at the payzone of underground, the processing of leakage becomes more complicated
Change, be easy to damage payzone if dealing with improperly, the yield after influence operation reduces the coefficient of mining of oil reservoir.
Occur leakage three conditions be：Firstth, the head of liquid in pit shaft is more than in formation pore, crack or solution cavity
, there is positive differential pressure to stratum in Fluid pressure.Secondth, leakage channel and the larger sky for being large enough to hold drilling fluid are there is in stratum
Between.3rd, the opening size of leakage channel is more than the particle diameter of solid phase in external working solution.
In China, begin to handle leakage using loss circulation material early in 1960s, and carried out some bases to grind
Study carefully work.In decades, particularly during the nearly last ten years, the development and application of loss circulation material has obtained larger development, in routine
On the basis of cement leak stopping and bridge material leak stopping, developed some NEW TYPE OF COMPOSITEs bridge joint sealing agent, efficient dehydration sealing agent, temporarily
The tens of kinds of loss circulation materials of several major classes such as blocking agent, chemical leak-stopping agent, individual event pressure seal agent.But, these loss circulation materials exist with
Lower deficiency：Most loss circulation materials have potential nocuity to payzone.In addition, in addition to cement, the leak stopping intensity of other loss circulation materials
It is not high, it may be leaked in drilling well because of High Pressure Difference by pressure again, the shortcomings of also there is long construction period, need to construct repeatedly.
At present, conventional blocking method is bridge joint leak stopping and cement leak stopping.In cement leak-stopping technique, cement mortar closure crack
And during solution cavity leakage stratum, first, final setting time is difficult to grasp, and construction risk is big, easily occurs highdensity cement mortar and quickly leaks
Lose and Fast Setting Cement Slurry rapid curing problem, cause drilling tool dead and the down-hole accident such as bit freezing, cause very big economic loss.Bridge joint
Leak stopping mainly uses a variety of loss circulation materials to prepare leak stopping slurry by a certain percentage, and then blocks crack, pore channel, passes through frame
Bridge, support, connection, closure, filling etc. act on blocking drop ply, and its key technology is that the distribution of particle size in sealing agent is
No and leakage channel diameter matches, but in drilling process, the fracture width on leakage stratum can not be accurately grasped sometimes
And pore-size, it is impossible to preferably with the formula for determining sealing agent, so as to add the uncertainty of construction, reduce leak stopping into
Power.
The content of the invention
The technical problems to be solved by the invention are to provide during one kind can improve wellbore construction, for gap or aperture
Miss the cage shell type drilling leakage blockage device of mud operating mode leak stopping success rate in hole.
The technical solution adopted for the present invention to solve the technical problems is：Cage shell type drilling leakage blockage device, including it is continuous small
Oil pipe, expansion sleeve, cage set and sealing shroud, the continuous little oil pipe are connected with expansion sleeve, and expansion sleeve is in sealed shape；Cage set includes many
The isometric cage post of root, and each cage post is connected and cylindrical clamp ring is formed, clamp ring at least two is enclosed, locking
The two ends of circle set adaptation ratchet, ratchet and clamp respectively, and ratchet and pawl causes clamp ring to swell；Sealing shroud is placed on cage
Set outside, expansion sleeve is located in cage set, and the expandable maximum gauge of expansion sleeve is more than the diameter that cage covers.
It is further：Plane and the length direction of cage post are orthogonal where the clamp ring, and each cage post is mutually put down
OK.
It is further：The clamp ring is welded to connect the outside with each cage post by clamp, two neighboring clamp ring
Spacing is 400mm.
It is further：The expansion sleeve is in series by multiple identicals expansion sub-set, the two ends difference of expansion sub-set
The joint being adapted is set, and two neighboring expansion sub-set is connected by connecting tube, and the expansion sub-set of head end is connected with continuous little oil pipe,
The expansion sub-set of end is closed by blocking.
The present invention also provides a kind of drilling leakage blockage method, solves to run into gap or small holes mud leakage work in drilling process
During condition, using existing blocking method leak stopping success rate it is not high the problem of, the technical scheme of use is：Drilling leakage blockage method, passes through
Any one above-mentioned cage shell type drilling leakage blockage device is implemented, and comprises the following steps：
The depth and scope of gap or small holes spillage, determine the position of leak stopping section in S1, detection drilling well；
S2, expansion is carried out to leak stopping section repaiied, expansion obtains expansion after repairing and repaiies section, expand and repair section cylindrical shaft wall diameter and be more than the straight of former cylindrical shaft wall
Footpath, and expand the upper and lower side for repairing section respectively beyond leak stopping section；
S3, the length according to leak stopping section, take length and the blanking of cage post, clamp ring then are welded in into cage post with clamp group
On, cage set is made；
S4, sealing shroud is cut, make the length of sealing shroud consistent with the length that cage covers, then sealing shroud is expired be enclosed on the outer of cage set
Face；
S5, expansion sleeve is put in cage set, expansion sleeve is connected with continuous little oil pipe；By continuous little oil pipe into expansion sleeve
Inflation, makes sealing shroud, cage set, expansion sleeve all be adjacent to, and now the external diameter of sealing shroud is less than the internal diameter of well casing；
S6, using continuous little oil pipe, whole cage set is fed through expansion from the well head of drilling well and repaiies section, then passes through continuous little oil pipe
Inflated into expansion sleeve, expansion sleeve expansion drives cage set and sealing shroud to expand, until the external diameter of sealing shroud reaches that a section borehole wall is repaiied in expansion
The diameter of cylinder；
S7, decompression is exhausted to expansion sleeve by continuous little oil pipe, and takes out expansion sleeve and continuous little oil pipe；
S8, to expansion repair section carry out cement leak stopping solidification.
Specifically, described to expand diameter at least 25mm of the diameter more than former cylindrical shaft wall for repairing section cylindrical shaft wall, expansion is repaiied above and below section
End is respectively beyond leak stopping section at least 300mm.
The beneficial effects of the invention are as follows：Using expansive force of the tension force and expansion sleeve of sealing shroud under compressed air effect,
Whole cage set can be suspended on continuous little oil pipe, then by continuous little oil pipe, can it is light, accurately by expansion sleeve, cage set, close
Section is repaiied in the expansion that drilling well is sent under big envelope；The clamp ring two ends of cage set set ratchet and pawl respectively, clamp ring can only expand without
It can reduce, cage set and sealing shroud locking repairing easily can be expanded section cylindrical shaft wall by the expansive force that expansion sleeve continues the generation inflated
On, reach the effect of leak stopping；Expansion sleeve exhaust is taken out after shrinking, simple operation；Cement leak stopping solidification finally is carried out to leakage section,
The purpose of underground leak stopping is reached, due to having been improved at leak stopping, it is ensured that the quality of cement leak stopping, improve leak stopping success
Rate.
Brief description of the drawings
Fig. 1 is the structural representation of cage shell type drilling leakage blockage device of the present invention in use.
Fig. 2 is A-A sectional views in Fig. 1.
Fig. 3 is the partial enlarged drawing in B regions in Fig. 2.
Parts, position and numbering in figure：Continuous little oil pipe 1, expansion sleeve 2, expansion sub-set 21, connecting tube 22, block 23,
Cage set 3, cage post 31, clamp ring 32, ratchet 32a, ratchet 32b, clamp 33, sealing shroud 4；Section 5, well casing 6 are repaiied in expansion.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, cage shell type drilling leakage blockage device of the present invention, including continuous little oil pipe 1, expansion sleeve 2, cage cover 3 and close
Big envelope 4, continuous little oil pipe 1 is connected with expansion sleeve 2, expansion sleeve 2 be in sealed shape, continuous little oil pipe 1 can into expansion sleeve 2 gas injection,
Exhaust, is changed with the breathing for realizing expansion sleeve 2.Expansion sleeve 2 can be integral, or as shown in figure 1, expansion sleeve 2 is by multiple phases
Same expansion sub-set 21 is in series, and the two ends of expansion sub-set 21 set the joint being adapted respectively, in order to carry out on demand
Series connection, two neighboring expansion sub-set 21 is connected by connecting tube 22, and wherein the expansion sub-set 21 of head end is connected with continuous little oil pipe 1,
The expansion sub-set 21 of end is closed by blocking 23, to ensure the seal of whole expansion sleeve 2.
Cage set 3 includes many isometric cage posts 31, and each cage post 31 is connected and cylindrical lock is formed
Collar 32, clamp ring 32 at least two is enclosed, and the two ends of clamp ring 32 set adaptation ratchet 32a, ratchet 32b and clamp 33, spine respectively
Wheel 32a and ratchet 32b causes clamp ring 32 to swell, and can not reduce.The place plane of clamp ring 32 and the length of cage post 31
Direction is orthogonal, and each cage post 31 is parallel to each other.Such as Fig. 2 and 3, cage set 3 includes the isometric cage post 31 of the six roots of sensation, and cage post 31 is mutual
Parallel, cage post 31 forms cage set 3 by the connection of clamp ring 32, and wherein clamp ring 32 is welded to connect in each cage post 31 by clamp 33
Outside.The spacing of two neighboring clamp ring 32 determines that the spacing of for example two neighboring clamp ring 32 is according to intensity requirement
400mm。
Sealing shroud 4 is placed on the outside of cage set 3, and sealing shroud 4 is directly contacted with clamp ring 32；Expansion sleeve 2 is put in cage set 3, and
And the expandable maximum gauge of expansion sleeve 2 is more than the diameter that cage covers 3.
Drilling leakage blockage method of the present invention, is implemented by the cage shell type drilling leakage blockage device of above-described embodiment, including following step
Suddenly：
The depth and scope of gap or small holes spillage, determine the position of leak stopping section in S1, detection drilling well.
S2, expansion is carried out to leak stopping section repaiied, expansion obtains expansion after repairing and repaiies section 5, and expansion repaiies section 5 provided with corresponding cylindrical shaft wall, and section 5 is repaiied in expansion
Expansion repair requirement and be：Expand and repair the diameter of phi 2 that the cylindrical shaft wall diameter of phi 1 of section 5 is more than former cylindrical shaft wall, and the upper and lower side point of section 5 is repaiied in expansion
Chao Chu not leak stopping section.Such as Fig. 1, expand diameter of phi 2 at least 25mm of the diameter of phi 1 more than former cylindrical shaft wall for repairing the cylindrical shaft wall of section 5, section is repaiied in expansion
5 upper and lower side expands the upper and lower side for repairing section 5 respectively beyond leak stopping section in leak stopping section at least 300mm, Fig. 1 respectively
300mm。
S3, the length according to leak stopping section, take length and the blanking of cage post 31, are then welded in clamp ring 32 for 33 groups with clamp
On cage post 31, cage set 3 is made.Now, the external diameter of cage set 3 is less than the internal diameter Φ 4 of well casing 6.
S4, sealing shroud 4 is cut, make the length of sealing shroud 4 consistent with the length that cage covers 3, then sealing shroud 4 is completely enclosed on into cage set
3 outside.
S5, expansion sleeve 2 is put in cage set 3, expansion sleeve 2 is connected with continuous little oil pipe 1；By continuous little oil pipe 1 to swollen
Inflated in expansion set 2, sealing shroud 4, cage set 3, expansion sleeve 2 is all adjacent to, form an entirety, and need to ensure now to seal
The external diameter Φ 3 of set 4 is less than the internal diameter Φ 4 of well casing 6.Expansion sleeve 2 is in series by expansion sub-set 21, and 3 length is covered according to cage
The appropriate number of expansion sub-set 21 of degree series connection.
S6, using continuous little oil pipe 1, whole cage is covered 3 and is fed through from the well head of drilling well and expands the pit shaft area for repairing section 5, i.e., under
It is put into leak stopping point.Continue to inflate into expansion sleeve 2 by continuous little oil pipe 1 again, expansion sleeve 2 continues to expand, and drives cage set 3 and close
Big envelope 4 expands, ratchet 32a and ratchet 32b the dislocation expansion of clamp ring 32, until the external diameter of sealing shroud 4 reaches that the borehole wall of section 5 is repaiied in expansion
The diameter of phi 1 of cylinder, stops inflation.Cage set 3 and sealing shroud 4 easily can be locked at by the expansive force for the generation that expansion sleeve 2 is inflated
Repair on expansion section cylindrical shaft wall, reach the effect of leak stopping；Moreover, cage set 3 and sealing shroud 4 can not reduce again.
S7, it is exhausted decompression to expansion sleeve 2 by continuous little oil pipe 1, then passes through continuous little oil pipe 1 and takes out expansion sleeve 2.
S8, to expansion repair section 5 carry out cement leak stopping solidification.Due to having been improved at leak stopping, it is ensured that cement leak stopping
Quality, improves leak stopping success rate.
Claims (6)
1. cage shell type drilling leakage blockage device, it is characterised in that：Including continuous little oil pipe (1), expansion sleeve (2), cage set (3) and sealing
Cover (4), the continuous little oil pipe (1) is connected with expansion sleeve (2), expansion sleeve (2) is in sealed shape；Cage set (3) is isometric including many
Cage post (31), and each cage post (31) is connected and cylindrical clamp ring (32) is formed, clamp ring (32) is extremely
Few two circle, the two ends of clamp ring (32) set adaptation ratchet (32a), ratchet (32b) and clamp (33) respectively, ratchet (32a) and
Ratchet (32b) causes clamp ring (32) to swell；Sealing shroud (4) is placed on the outside of cage set (3), and expansion sleeve (2) is located at cage set (3)
It is interior, and expansion sleeve (2) expandable maximum gauge is more than the diameter of cage set (3).
2. cage shell type drilling leakage blockage device as claimed in claim 1, it is characterised in that：Plane where the clamp ring (32) with
The length direction of cage post (31) is orthogonal, and each cage post (31) is parallel to each other.
3. cage shell type drilling leakage blockage device as claimed in claim 2, it is characterised in that：The clamp ring (32) passes through clamp
(33) outside with each cage post (31) is welded to connect, the spacing of two neighboring clamp ring (32) is 400mm.
4. cage shell type drilling leakage blockage device as claimed in claim 1, it is characterised in that：The expansion sleeve (2) is by multiple identical
Expansion sub-set (21) be in series, the two ends of expansion sub-set (21) set the joint being adapted respectively, two neighboring expansion
Cover (21) to be connected by connecting tube (22), the expansion sub-set (21) of head end is connected with continuous little oil pipe (1), the expansion sub-set of end
(21) it is closed by blocking (23).
5. drilling leakage blockage method, it is characterised in that：Bored by the cage shell type described in any claim of the claims 1 to 4
Well device for plugging is implemented, and comprises the following steps：
The depth and scope of gap or small holes spillage, determine the position of leak stopping section in S1, detection drilling well.
S2, expansion is carried out to leak stopping section repaiied, expansion obtains expansion after repairing and repaiies section (5), expand and repair the diameter (Φ 1) of section (5) cylindrical shaft wall and be more than original
The diameter (Φ 2) of cylindrical shaft wall, and expand the upper and lower side for repairing section (5) respectively beyond leak stopping section；
S3, the length according to leak stopping section, take length and the blanking of cage post (31), then weld clamp ring (32) with clamp (33) group
On cage post (31), cage set (3) is made；
S4, sealing shroud (4) is cut, make the length of sealing shroud (4) consistent with the length of cage set (3), then sealing shroud (4) is completely enclosed on
The outside of cage set (3)；
S5, expansion sleeve (2) is put in cage set (3), expansion sleeve (2) is connected with continuous little oil pipe (1)；Pass through continuous little oil pipe
(1) inflated into expansion sleeve (2), sealing shroud (4), cage set (3), expansion sleeve (2) is all adjacent to, and now sealing shroud (4)
External diameter (Φ 3) be less than well casing (6) internal diameter (Φ 4)；
S6, using continuous little oil pipe (1), whole cage set (3) is fed through expansion from the well head of drilling well and repaiies section (5), then by continuous
Little oil pipe (1) is inflated into expansion sleeve (2), expansion sleeve (2) expansion, drives cage set (3) and sealing shroud (4) to expand, until sealing
The external diameter of set (4) reaches that the diameter (Φ 1) of section (5) cylindrical shaft wall is repaiied in expansion；
S7, decompression is exhausted to expansion sleeve (2) by continuous little oil pipe (1), and takes out expansion sleeve (2) and continuous little oil pipe
(1)；
S8, to expansion repair section (5) carry out cement leak stopping solidification.
6. drilling leakage blockage method as claimed in claim 5, it is characterised in that：It is described to expand the diameter for repairing section (5) cylindrical shaft wall in S2
(Φ 1) is more than diameter (Φ 2) at least 25mm of former cylindrical shaft wall, and the upper and lower side that section (5) is repaiied in expansion exceeds leak stopping section at least respectively
300mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710665100.XA CN107246249B (en) | 2017-08-07 | 2017-08-07 | Cage type well drilling plugging device and well drilling plugging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710665100.XA CN107246249B (en) | 2017-08-07 | 2017-08-07 | Cage type well drilling plugging device and well drilling plugging method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107246249A true CN107246249A (en) | 2017-10-13 |
| CN107246249B CN107246249B (en) | 2023-05-26 |
Family
ID=60012575
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|---|---|---|---|
| CN201710665100.XA Active CN107246249B (en) | 2017-08-07 | 2017-08-07 | Cage type well drilling plugging device and well drilling plugging method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112832707A (en) * | 2019-11-22 | 2021-05-25 | 中国石油化工股份有限公司 | Hydraulic expansion type leakage stopping tool and leakage stopping method thereof |
| CN112855067A (en) * | 2019-11-28 | 2021-05-28 | 中国石油化工股份有限公司 | Mechanical expansion type leakage stopping tool and leakage stopping method thereof |
| CN114635665A (en) * | 2022-05-20 | 2022-06-17 | 西安石油大学 | Plugging device for petroleum drilling |
| CN114673482A (en) * | 2022-03-29 | 2022-06-28 | 无锡工艺职业技术学院 | Portable system of patrolling and examining in 5G wisdom colliery |
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| CN114673482B (en) * | 2022-03-29 | 2022-10-11 | 无锡工艺职业技术学院 | Portable system of patrolling and examining in 5G wisdom colliery |
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| CN114635665B (en) * | 2022-05-20 | 2022-08-02 | 西安石油大学 | Oil drilling plugging device |
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