CN105715221A - Seafloor sediment rope coring three-layer pipe drilling tool suitable for seafloor drilling machine - Google Patents

Seafloor sediment rope coring three-layer pipe drilling tool suitable for seafloor drilling machine Download PDF

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Publication number
CN105715221A
CN105715221A CN201610275780.XA CN201610275780A CN105715221A CN 105715221 A CN105715221 A CN 105715221A CN 201610275780 A CN201610275780 A CN 201610275780A CN 105715221 A CN105715221 A CN 105715221A
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China
Prior art keywords
pipe
bit
hole
sediment
interior
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CN201610275780.XA
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Chinese (zh)
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CN105715221B (en
Inventor
万步炎
黄筱军
王佳亮
彭佑多
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Hunan University of Science and Technology
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Hunan University of Science and Technology
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Priority to CN201610275780.XA priority Critical patent/CN105715221B/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B25/00Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B25/00Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
    • E21B25/18Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors the core receiver being specially adapted for operation under water

Abstract

The invention discloses a seafloor sediment rope coring three-layer pipe drilling tool suitable for a seafloor drilling machine. The drilling tool comprises an outer pipe assembly and an inner pipe assembly, wherein the inner pipe assembly comprises a salvaging spearhead mechanism; the lower end of the salvaging spearhead mechanism is connected with an elastic card positioning mechanism; the elastic card positioning mechanism is arranged on a seat ring of the outer pipe assembly through a hanging ring and is connected with an inner pipe through an inner pipe joint; a rock core lining pipe is arranged in the inner pipe; an inner pipe drilling bit is arranged at the lower end of the inner pipe; a positioning pressing ring and a seafloor salvager are arranged in the inner pipe drilling bit; a sealing ring is arranged between an outer pipe drilling bit and the inner pipe drilling bit; and a water flow passageway for communicating an annular gap between the inner pipe and the outer pipe with the inner cavity of the rock core lining pipe, and a water flow passageway for communicating the annular gap between the inner pipe and the outer pipe with an annular gap between the inner pipe and the rock core lining pipe are formed in the inner pipe joint. The seafloor sediment rope coring three-layer pipe drilling tool is simple in structure and high in reliability; and furthermore, direct scouring of flushing liquid to a sample can be avoided, the seafloor sediment rope coring rate can be increased, and disturbance of the sample is reduced.

Description

A kind of bottom sediment wire line coring three-layer pipe drilling tool suitable in seabed rig
Technical field
The present invention relates to a kind of deposit cord coring drill, especially relate to a kind of bottom sediment wire line coring three-layer pipe drilling tool suitable in seabed rig.
Background technology
The exploitation of deep-sea resources have become as a new focus of countries in the world Future strategy.Along with the development of deep-sea drilling technology, core drilling quality is proposed higher index request by it.When drilling process runs into sediment stratum, if using conventional cord coring drill, and adopt direct circulation wire line coring mode to creep into, malleation owing to being full of in sea water and drilling tool in drilling tool is bigger, easily cause rock core resistance in entering inner tube of core barrel process excessive, causing that rate of coring reduces, the disturbance of sample and secondary destructiveness are relatively big, affect integrity and the quality of core sample.Additionally, when the soft or hard intertonguing thing stratum being mingled with a small amount of thin layer rock or layer of sand is crept into, conventional cord coring drill cannot ensure the effect of coring to softer deposit and harder thin layer rock, bad adaptability simultaneously.
Summary of the invention
In order to solve above-mentioned technical problem, the present invention provides the bottom sediment wire line coring three-layer pipe drilling tool being applicable to seabed rig that a kind of simple in construction, reliability are high, and it can improve the rate of coring when soft or hard intertonguing thing stratum, seabed is crept into.
The technical solution used in the present invention is: include outer pipe assembly and inner tube assembly, and described outer pipe assembly includes adapter coupling, bullet card room, outer tube, seat ring, reamer and outer pipe bit;Described inner tube assembly includes dragging for spearhead mechanism, bullet card detent mechanism, hanging ring, inner pipe joint, interior pipe, rock core bushing pipe, location pressure ring, sea are dragged for and interior pipe bit;The lower end dragging for spearhead mechanism is connected with bullet card detent mechanism, and bullet card detent mechanism is provided with hanging ring, is placed on the seat ring in outer tube by hanging ring, and the lower end of bullet card detent mechanism is connected with the upper end of inner pipe joint;The lower end of inner pipe joint is connected with the upper end of interior pipe, and rock core bushing pipe is arranged in interior pipe;Inner pipe joint is provided with for connecting the water-flowing path of annular gap and rock core bushing pipe inner chamber between inner and outer tubes, and this water-flowing path is provided with backwater ball valve;Inner pipe joint is additionally provided with for connecting between inner and outer tubes the water-flowing path of annular gap between annular gap and interior pipe and rock core bushing pipe;The lower end of interior pipe is connected with interior pipe bit, and location pressure ring is arranged on the interior step of interior pipe bit, and the sea that is connected with of interior pipe bit inner position pressure ring is dragged for;It is provided with sealing ring between outer pipe bit and interior pipe bit.
Above-mentioned suitable in the bottom sediment wire line coring three-layer pipe drilling tool of seabed rig, the bottom surface of said inner tube joint is provided with blind hole in the axial direction, blind hole is shoulder hole;Being provided with water proof set in blind hole, the aperture place of blind hole is provided with backwater ball valve;The top of blind hole is along the circumferential direction evenly arranged with inclined hole;Gap between inclined hole connection blind hole and inner pipe joint and outer tube;The inner space of endoporus, backwater ball valve and rock core bushing pipe that inclined hole is overlapped by water proof;The inwall of inner pipe joint and form lacuna between water-jacket outer wall, the lacuna place of inner pipe joint is along the circumferential direction evenly arranged with the through hole for connecting annular gap between lacuna with outer tube and interior pipe and respectively for connecting the through hole of annular gap between lacuna and interior pipe and rock core bushing pipe.
Above-mentioned suitable in the bottom sediment wire line coring three-layer pipe drilling tool of seabed rig, described inclined hole aperture on inner pipe joint inwall is higher than the aperture on inner pipe joint outer wall, and the aperture place that inclined hole is on inner pipe joint outer wall is provided with annular groove, the cross section of groove is V-shaped.
Above-mentioned suitable in the bottom sediment wire line coring three-layer pipe drilling tool of seabed rig, the inwall of said inner tube drill bit is along the circumferential direction evenly arranged with multiple water-flowing trough.
Above-mentioned suitable in the bottom sediment wire line coring three-layer pipe drilling tool of seabed rig, it is provided with adjusting washer (disk) between described bullet card detent mechanism and inner pipe joint, adjusting washer (disk) can the relative position of internally pipe bit and outer pipe bit be adjusted, described interior pipe bit is ahead of outer pipe bit, or concordant with outer pipe bit, or inside contract outside in pipe bit.
Above-mentioned suitable in the bottom sediment wire line coring three-layer pipe drilling tool of seabed rig, the external cylindrical surface of described location pressure ring is along the circumferential direction evenly arranged with multiple water-flowing trough.
Above-mentioned suitable in the bottom sediment wire line coring three-layer pipe drilling tool of seabed rig, described sealing ring is U-shaped sealing ring or O RunddichtringO.
Compared with prior art, the invention has the beneficial effects as follows:
1) present invention has double; two dynamic function, both pure press mode can have been adopted to core, rotary drilling mode can be adopted again to core, evenly distributed in the circumferential direction on external cylindrical surface of the inwall of pipe bit and location pressure ring in it have multiple water-flowing trough, the inner pipe joint in the present invention with point water function is coordinated to use together, when adopting rotary drilling mode to creep into, flushing liquor can be made to flow through at the bottom of hole along the annular gap between rock core bushing pipe and interior pipe, effectively prevent flushing liquor to directly the washing away of sample in rock core bushing pipe, reduce the disturbance of sample;
2) the aperture place on inner pipe joint outer wall of the inclined hole on inner pipe joint of the present invention is provided with annular groove, the cross section of groove is V-shaped, when adopting rotary drilling mode to creep into, the flushing liquor flowing through at a high speed annular groove can be formed about a negative pressuren zone at groove, make to produce in rock core bushing pipe swabbing effect, be conducive to the water in rock core bushing pipe to discharge smoothly along inclined hole, improve rate of coring.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of the location pressure ring of the present invention.
In figure: 1-drags for spearhead mechanism;2-adapter coupling;3-bullet card room;4-bullet mechanism for card;5-hanging ring;6-seat ring;7-adjusting washer (disk);8-outer tube;9-inner pipe joint;10-water proof set;11-backwater ball valve;Pipe in 12-;13-rock core bushing pipe;14-reamer;15-positions pressure ring;16-drags in sea;Pipe bit in 17-;18-sealing ring;The outer pipe bit of 19-.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As it is shown in figure 1, the present invention includes outer pipe assembly and inner tube assembly, inner tube assembly is placed in outer pipe assembly.Described outer pipe assembly includes bullet card shelves 2, bullet card room 3, seat ring 6, outer tube 8, reamer 14 and outer pipe bit 19;Bullet card shelves 2, bullet card room 3, outer tube 8, reamer 14 and outer pipe bit 19 are sequentially connected with;Seat ring 6 is arranged on the inwall of outer tube 8.
Described inner tube assembly includes dragging for spearhead mechanism 1,16 and interior pipe bit 17 are dragged in bullet card detent mechanism 4, hanging ring 5, adjusting washer (disk) 7, inner pipe joint 9, interior pipe 12, rock core bushing pipe 13, location pressure ring 15, sea;The lower end dragging for spearhead mechanism 1 is connected with bullet card detent mechanism 4, the bottom of bullet card detent mechanism 4 is provided with hanging ring 5, hanging ring 5 is placed on the seat ring 6 in outer tube 8, the lower end of bullet card detent mechanism 4 is connected with the upper end of inner pipe joint 9, is provided with adjusting washer (disk) 7 between bullet card detent mechanism 4 and inner pipe joint 9;By adjusting the number of the adjusting washer (disk) 7 between bullet card detent mechanism 4 and inner pipe joint 9, can the relative position of internally pipe bit 17 and outer pipe bit 19 be adjusted, in realizing, pipe bit 17 inside contracts outside in pipe bit 19, or flushes with outer pipe bit 19, or is ahead of outer pipe bit 19.The lower end of inner pipe joint 9 is connected with the upper end of interior pipe 12;Rock core bushing pipe 13 is arranged in interior pipe 12;The lower end of interior pipe 12 is connected with interior pipe bit 17, and location pressure ring 15 is arranged on the interior step of interior pipe bit 17, and the lower end of rock core bushing pipe 13 is arranged on the step surface of location pressure ring 15 endoporus.The sea that is connected with of interior pipe bit 17 inner position pressure ring 15 drags for 16.Being provided with sealing ring 18 between outer pipe bit 19 and interior pipe bit 18, what sealing ring 18 adopted is U-shaped sealing ring or O RunddichtringO.
Being provided with blind hole 91 on the bottom surface of described inner pipe joint 9 in the axial direction, blind hole 91 is shoulder hole.Being provided with water proof set 10 in blind hole 91, the aperture place of blind hole 91 is provided with backwater ball valve 11.The top of blind hole 91 is along the circumferential direction evenly arranged with multiple inclined hole 92, and inclined hole 92 connects the gap between blind hole 91 and inner pipe joint 9 and outer tube 8.Inclined hole 92 is by the inner space of the endoporus of water proof set 10, backwater ball valve 11 and rock core bushing pipe 13, formed for connecting the water-flowing path of annular gap and rock core bushing pipe 13 inner chamber between inner pipe joint 9 and outer tube 8, backwater ball valve 11 is check valve, only allows flushing liquor to flow to the annular gap between inner pipe joint 9 and outer tube 8 from the inner chamber of rock core bushing pipe 13.Described inclined hole 92 is higher than in the aperture at inner pipe joint outer wall place in the aperture at inner pipe joint inwall place, and the aperture place that inclined hole 92 is on inner pipe joint outer wall is provided with annular groove, and the cross section of groove is V-shaped.When the present invention adopts rotary drilling mode to creep into, the flushing liquor flowing through at a high speed annular groove can be formed about a negative pressuren zone at groove, make to produce in rock core bushing pipe 13 swabbing effect, be conducive to the water in rock core bushing pipe 13 to discharge along inclined hole 92 smoothly, improve rate of coring.
Forming lacuna in the middle part of the inwall of blind hole 91 and between the outer wall of water proof set 10, the lacuna place of inner pipe joint 9 is along the circumferential direction evenly arranged with multiple through hole 93 for connecting annular gap between lacuna with outer tube 8 and interior pipe 12 and multiple through hole 94 for connecting annular gap between lacuna and interior pipe 12 and rock core bushing pipe 13.Through hole 93, lacuna and through hole 94 are constituted for connecting between inner pipe joint 9 and outer tube 8 water-flowing path of annular gap between annular gap and interior pipe 12 and rock core bushing pipe 13.
As shown in Figure 1, 2, the inwall of said inner tube drill bit 17 being along the circumferential direction evenly arranged with multiple water-flowing trough 171, water-flowing trough 171 is axially arranged along interior pipe bit 17.Evenly distributed in the circumferential direction on the external cylindrical surface of described location pressure ring 15 have multiple water-flowing trough 151, and water-flowing trough 151 is arranged along the axis direction of location pressure ring 15.
It is provided with sealing ring 18 between outer pipe bit 19 and the interior pipe bit 17 of the present invention, annular gap between interior pipe 8 and outer tube 6 is effectively sealed, coordinate the aspirator on rig, can make to be formed in the present invention piston type negative pressure, realize suction wire line coring, stop rock core to glide, improve the wire line coring rate of bottom sediment.The inwall of the interior pipe bit 17 of the present invention and the external cylindrical surface of location pressure ring 15 are provided with water-flowing trough, the inner pipe joint 9 coordinating the present invention uses, flushing liquor can be made to flow through at the bottom of hole along the annular gap of rock core bushing pipe 13 and interior pipe 12, effectively prevent flushing liquor to directly the washing away of sample in rock core bushing pipe 13, reduce the disturbance of sample so that the reliability of the present invention is high.The present invention has double; two dynamic function, and interior pipe bit 17 and inner tube assembly together can rotate with outer tube 8, the pure press-in mode of creeping into both can have been adopted to take deposit, rotary drilling mode can be adopted again to take hard rock rock core.
The specifically used method of the present invention is as follows: when running into sediment stratum, and the inner tube assembly transferring the present invention creeps into, and in the process crept into, water pump stops supplying water in hole, and the present invention, under the drive of drill power head, is pressed into sediment stratum.When the present invention be pressed into sediment stratum carry out wire line coring operation time, aspirator on rig is drawn water in drilling rod and cord coring drill by feed pipe, performance parameter by appropriate design aspirator, make the water yield that aspirator extracts from the inner chamber of drilling rod and the present invention of substantially equal to the displacement of drilling rod inner chamber with because of the deposit entrance present invention, form piston type negative pressure in the present invention, improve the wire line coring rate of the present invention.When being mingled with a small amount of thin layer rock in sediment stratum, drilling tool adopts rotary drilling mode, and interior pipe bit and inner tube assembly together rotate fractured rock with outer tube;Water pump supplies water in hole, and cooling water through inner pipe joint 9, flows through at the bottom of hole along the annular gap between interior pipe 12 and rock core bushing pipe 13, it is to avoid cooling water, to directly the washing away of sample in rock core bushing pipe 13, reduces the disturbance of sample.

Claims (7)

1. being applicable to a bottom sediment wire line coring three-layer pipe drilling tool for seabed rig, including outer pipe assembly and inner tube assembly, described outer pipe assembly includes adapter coupling, bullet card room, outer tube, seat ring, reamer and outer pipe bit;It is characterized in that: described inner tube assembly includes dragging for spearhead mechanism, bullet card detent mechanism, hanging ring, inner pipe joint, interior pipe, rock core bushing pipe, location pressure ring, sea are dragged for and interior pipe bit;The lower end dragging for spearhead mechanism is connected with bullet card detent mechanism, and bullet card detent mechanism is provided with hanging ring, is placed on the seat ring in outer tube by hanging ring, and the lower end of bullet card detent mechanism is connected with the upper end of inner pipe joint;The lower end of inner pipe joint is connected with the upper end of interior pipe, and rock core bushing pipe is arranged in interior pipe;The inside of inner pipe joint is provided with for connecting the water-flowing path of annular gap and rock core bushing pipe inner chamber between inner and outer tubes, and this water-flowing path is provided with backwater ball valve;It is additionally provided with inside inner pipe joint for connecting between inner and outer tubes the water-flowing path of annular gap between annular gap and interior pipe and rock core bushing pipe;The lower end of interior pipe is connected with interior pipe bit, and location pressure ring is arranged on the interior step of interior pipe bit, and the sea that is connected with of location pressure ring is dragged for;It is provided with sealing ring between outer pipe bit and interior pipe bit.
2. the bottom sediment wire line coring three-layer pipe drilling tool suitable in seabed rig according to claim 1, is characterized in that: be provided with blind hole on the bottom surface of said inner tube joint in the axial direction, and blind hole is shoulder hole;Being provided with water proof set in blind hole, the aperture place of blind hole is provided with backwater ball valve;The top of blind hole is along the circumferential direction evenly arranged with inclined hole;Gap between inclined hole connection blind hole and inner pipe joint and outer tube;The inner space of endoporus, backwater ball valve and rock core bushing pipe that inclined hole is overlapped by water proof;The inwall of inner pipe joint and form lacuna between water-jacket outer wall, the lacuna place of inner pipe joint is along the circumferential direction evenly arranged with the through hole for connecting annular gap between lacuna with outer tube and interior pipe and respectively for connecting the through hole of annular gap between lacuna and interior pipe and rock core bushing pipe.
3. the bottom sediment wire line coring three-layer pipe drilling tool suitable in seabed rig according to claim 2, it is characterized in that: described inclined hole aperture on inner pipe joint inwall is higher than the aperture on inner pipe joint outer wall, and the aperture place that inclined hole is on inner pipe joint outer wall is provided with annular groove, the cross section of groove is V-shaped.
4. the bottom sediment wire line coring three-layer pipe drilling tool suitable in seabed rig according to claim 1, is characterized in that: be along the circumferential direction evenly arranged with multiple water-flowing trough on the inwall of said inner tube drill bit.
5. the bottom sediment wire line coring three-layer pipe drilling tool suitable in seabed rig according to claim 1 and 2, it is characterized in that: between described bullet card detent mechanism and inner pipe joint, be provided with adjusting washer (disk), adjusting washer (disk) can the relative position of internally pipe bit and outer pipe bit be adjusted, described interior pipe bit is ahead of outer pipe bit, or concordant with outer pipe bit, or inside contract outside in pipe bit.
6. the bottom sediment wire line coring three-layer pipe drilling tool suitable in seabed rig according to claim 1, is characterized in that: be along the circumferential direction evenly arranged with multiple water-flowing trough on the external cylindrical surface of described location pressure ring.
7. the bottom sediment wire line coring three-layer pipe drilling tool suitable in seabed rig according to claim 1, is characterized in that: described sealing ring is U-shaped sealing ring or O RunddichtringO.
CN201610275780.XA 2016-04-29 2016-04-29 A kind of bottom sediment wire line coring three-layer pipe drilling tool suitable for seabed rig Active CN105715221B (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN106351597A (en) * 2016-11-17 2017-01-25 湖南科技大学 Natural gas hydrate pressure retaining rope coring drill applicable to submarine drill
CN109025880A (en) * 2018-08-13 2018-12-18 湖南科技大学 A kind of deposit core-drilling technique suitable for seabed wire line coring drilling machine
US10927606B2 (en) 2018-08-13 2021-02-23 Hunan University Of Science And Technology Sediment core-drilling process for submarine wire-line coring drill rig

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106351597A (en) * 2016-11-17 2017-01-25 湖南科技大学 Natural gas hydrate pressure retaining rope coring drill applicable to submarine drill
CN109025880A (en) * 2018-08-13 2018-12-18 湖南科技大学 A kind of deposit core-drilling technique suitable for seabed wire line coring drilling machine
CN109025880B (en) * 2018-08-13 2019-11-26 湖南科技大学 A kind of deposit core-drilling technique suitable for seabed wire line coring drilling machine
US10927606B2 (en) 2018-08-13 2021-02-23 Hunan University Of Science And Technology Sediment core-drilling process for submarine wire-line coring drill rig

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