CN105239947A - Seafloor sediment coring device applicable to seafloor drilling machine - Google Patents

Seafloor sediment coring device applicable to seafloor drilling machine Download PDF

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Publication number
CN105239947A
CN105239947A CN201510717338.3A CN201510717338A CN105239947A CN 105239947 A CN105239947 A CN 105239947A CN 201510717338 A CN201510717338 A CN 201510717338A CN 105239947 A CN105239947 A CN 105239947A
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China
Prior art keywords
core
pumping piston
piston cylinder
suction
existing
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Pending
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CN201510717338.3A
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Chinese (zh)
Inventor
万步炎
金永平
黄筱军
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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 CN201510717338.3A priority Critical patent/CN105239947A/en
Publication of CN105239947A publication Critical patent/CN105239947A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a seafloor sediment coring device applicable to a seafloor drilling machine. The seafloor sediment coring device applicable to the seafloor drilling machine is characterized in that on the basis of the existing seafloor drilling machine, a suction piston cylinder is additionally arranged, is fixedly mounted in an existing seafloor drilling machine and comprises a suction cylinder barrel, a suction piston and piston rod subassembly and a piston end cap; the suction piston and piston rod assembly is inserted in the suction cylinder barrel; the suction piston and the inner wall of the suction cylinder barrel are sealed through a sealing ring; one end of the suction piston rod is fixedly connected with the suction piston; the other end of the suction piston rod is connected with a drilling power head or a propelling mechanism of the existing seafloor drilling machine; the suction piston is driven by the drilling power head and the propelling mechanism of the existing seafloor drilling machine in a combination mode; and through reasonable selection of the inner diameter of the suction piston cylinder, the amount of water which is extracted by the suction piston cylinder from an inner cavity of a drill pipe via a water supply tube of the drilling power head is basically equal to the amount of water which is drained to the inner cavity of the drill pipe as sediments enter the coring drilling machine, piston type negative-pressure suction coring is realized, the sediment coring rate of the seafloor drilling machine is thus improved greatly, and disturbance on sediment samples is reduced.

Description

A kind of bottom sediment coring device being applicable to seabed rig
Technical field
The present invention relates to a kind of deposit coring device, especially relate to a kind of bottom sediment coring device being applicable to seabed rig.
Background technology
Exploitation along with deep seafloor resource have become the technical field of a newly developing of countries in the world Future strategy.Before seabed resources large-scale development/exploitation, be necessary also to carry out exploration sampling, to obtain this regional undersea distribution of resource situation, quality, buried depth etc. information by/production zone to be developed to this seabed.When seabed resources are mainly soft Distribution of Surface Sediment, core method/the technology of getting of direct use existing seabed rig gets core operation to bottom sediment, because the seawater of core bit inner sealing cavity cannot be discharged in time, deposit is entered in core bit and becomes very difficult, cause core-taking rate very low, simultaneously by the impact of core bit inner sealing cavity hydraulic pressure, the sediment sample got often is subject to larger disturbance and even destroys, and will have a strong impact on sediment sample to the integrality of seabed resources at Different Strata record like this.
Summary of the invention
Get at bottom sediment the deficiency that the on the low side and deposit of core-taking rate in core process is subject to compared with large disturbances in order to overcome above-mentioned existing seabed rig, the invention provides a kind of be applicable to the increased substantially seabed rig of seabed rig deposit core-taking rate and the bottom sediment coring device reduced sediment sample disturbance.
The technical solution used in the present invention is: it sets up a pumping piston cylinder on rig basis, existing seabed, it is inner that described pumping piston cylinder is fixedly installed in existing seabed rig, comprise suction cylinder barrel, be sleeved on the pumping piston in suction cylinder barrel and piston rod assembly, piston end cap, sealed by sealing ring between pumping piston and suction inner wall of cylinder, pumping piston bar one end is fixedly connected with pumping piston, the other end creeps into unit head with existing seabed rig or its propulsive mechanism is connected, unit head propulsive mechanism linkage driving is crept into by existing seabed rig, or creep into the direct related driving of unit head by existing seabed rig, with existing seabed rig working method unlike, the other end that this seabed rig creeps into unit head feed pipe is not connect flush water pump, but be connected with one end rodless cavity of described pumping piston cylinder or rod chamber, described pumping piston cylinder does not connect the other end rod chamber of described feed pipe or rodless cavity is then directly communicated with emptying with extraneous seawater, because the piston of described pumping piston cylinder creeps into unit head or the related driving of its propulsive mechanism by existing seabed rig, existing seabed rig is made to creep into unit head while the deposit of promotion existing seabed rig core bit press-in downwards gets core, described pumping piston cylinder creeps into unit head feed pipe by existing seabed rig and draws water from drilling rod and core bit inner chamber, thus realize piston type negative-pressure ward and get core, described feed pipe specifically accesses the rodless cavity of described pumping piston cylinder or rod chamber then depends on itself and the described linked manner creeping into unit head or its propulsive mechanism, principle be when described in creep into unit head promote core bit press-in deposit carry out getting core operation time, described pumping piston cylinder should be drawn water in drilling rod and core bit by feed pipe, for reducing the disturbance of getting core product as far as possible, the water yield that described pumping piston cylinder should be extracted from drilling rod and core bit inner chamber by pumping piston cylinder bore described in Rational choice with enter core bit because of deposit and amount to the draining of drilling rod inner chamber is substantially equal.
Above-mentioned is applicable in the bottom sediment coring device of seabed rig, and described feed pipe is not directly access described pumping piston cylinder, but is connected with described pumping piston cylinder by a multidirectional changeover switch valve.The another port of described multidirectional changeover switch valve is connected with seabed rig flush water pump, the effect of described multidirectional changeover switch valve switches the connection between feed pipe and pumping piston cylinder and flush water pump, realize deposit to be pressed into suction to get core when feed pipe is connected with pumping piston cylinder through multidirectional changeover switch valve, flush water pump can be exported outwardly seawater open simultaneously; Realize common direct circulation to rinse abrasion drill to keep forging ahead core when feed pipe is connected with flush water pump through multidirectional changeover switch valve, by pumping piston cylinder pump orifice, outwardly seawater is open simultaneously.
Above-mentioned is applicable in the bottom sediment coring device of seabed rig, described pumping piston cylinder can replace with water pump, when creeping into unit head promotion core bit press-in deposit and carrying out getting core operation, water pump is utilized to be drawn water in drilling rod and core bit by feed pipe.For reducing the disturbance of getting core product as far as possible, answer choose reasonable water pump size, simultaneously conservative control water pump start-stop time and pump-out, the water yield that water pump is extracted from drilling rod and core bit inner chamber with enter core bit because of deposit and amount to the draining of drilling rod inner chamber is substantially equal.
Above-mentioned is applicable in the bottom sediment coring device of seabed rig, and described core bit can be single tube drilling tool, two-tube drilling tool or three pipe drilling tools that existing seabed rig is conventional, also can be core plugging notifying mechanism of rope core drilling.When using two-tube or three pipe drilling tool of look ahead system, get the sealing that annular gap between in-core pipe and drilling tool outer tube carries out to a certain degree preferably by certain mode, enter core bit inner chamber to prevent extraneous seawater from the annular gap got between in-core pipe and drilling tool outer tube thus reduce suction and get core effect.
Compared with prior art, advantage of the present invention is: realize implementing low disturbance to bottom sediment while of increasing substantially seabed rig deposit core-taking rate and get core, the pumping piston structure in the present invention is simultaneously simple, reliability is high.
Accompanying drawing explanation
Fig. 1 is embodiments of the invention 1 structural representations.
Fig. 2 is embodiments of the invention 2 structural representations.
Fig. 3 is embodiments of the invention 3 structural representations.
Fig. 4 is embodiments of the invention 4 structural representations.
Specific embodiments
Below in conjunction with drawings and Examples, the present invention is further illustrated.
A kind of embodiment of the present invention is: a kind of bottom sediment coring device being applicable to seabed rig as shown in Figure 1, it sets up a pumping piston cylinder 1 on rig basis, existing seabed, it is inner that described pumping piston cylinder 1 is fixedly installed in existing seabed rig, comprise suction cylinder barrel 2, be sleeved on the pumping piston 3 in suction cylinder barrel 2 and pumping piston bar 5, sealed by sealing ring 4 between pumping piston 3 and suction cylinder barrel 2 inwall, pumping piston bar 5 one end is fixedly connected with pumping piston 3, the other end is connected through the piston rod 9 of contiguous block 6 with existing seabed drilling machine advancing mechanism 10, core bit 15 with creep into unit head 13 be directly connected or by one or more drilling rod 14 with creep into unit head 13 and be connected, creeping into unit head 13 is fixed on sliding rail frame 8 by sliding support block 7, sliding support block 7 is connected with the piston rod 9 of existing seabed drilling machine advancing mechanism 10, creep into unit head 13 to be driven by propulsive mechanism 10 and move up and down along sliding rail frame 8, drive drilling rod 16 and core bit 17 to be pressed into deposit to realize getting core, one end of feed pipe 11 by rotation seal joint 12 through creeping into unit head 13 and drilling rod 14 and core bit 15 inner space, the other end of feed pipe 11 is connected with the rodless cavity of pumping piston cylinder 1, and pumping piston cylinder 1 rod chamber is then directly communicated with emptying with extraneous seawater.When getting core operation to bottom sediment, due to described pumping piston cylinder 1 piston 3 and creep into unit head 13 and synchronously driven by propulsive mechanism 10, making existing seabed rig creep into unit head 13 is pressed into while deposit gets core promoting downwards existing seabed rig core bit 15, the feed pipe 11 that described pumping piston cylinder 1 is crept on unit head 13 by existing seabed rig draws water from drilling rod 14 and core bit 15 inner chamber, thus realize piston type negative-pressure ward and get core, for reducing the disturbance of getting core product as far as possible, the water yield that described pumping piston cylinder 1 should be extracted from drilling rod 14 and core bit 15 inner chamber by the internal diameter of pumping piston cylinder 1 described in Rational choice with enter core bit 15 because of deposit and amount to the draining of drilling rod 14 inner chamber is substantially equal.
Embodiment 2
As shown in Figure 2, similar to the structure of embodiment 1, difference is: described feed pipe 11 is not directly access pumping piston cylinder 1, but is connected with pumping piston cylinder 1 by changeover switch valve 17.The another port of changeover switch valve 17 is connected with seabed rig flush water pump 16, the effect of changeover switch valve 17 switches the connection between feed pipe 11 and pumping piston cylinder 1 and flush water pump 16, realizes deposit be pressed into suction and get core when feed pipe 11 is connected with pumping piston cylinder 1 through changeover switch valve 17; Realize common direct circulation to rinse abrasion drill to keep forging ahead core when feed pipe 11 is connected with flush water pump 16 through changeover switch valve 17.
Embodiment 3
As shown in Figure 3, similar to the structure of embodiment 2, difference is, described pumping piston cylinder 1 can replace with water pump 18, when creep into unit head 13 promote core bit 15 be pressed into deposit carry out getting core operation time, utilize water pump 18 to be drawn water in drilling rod 14 and core bit 15 by feed pipe 11.For reducing the disturbance of getting core product as far as possible, answer choose reasonable water pump 18 size, simultaneously conservative control water pump 18 start-stop time and pump-out, the water yield that water pump 18 is extracted from drilling rod 14 and core bit 15 inner chamber with enter core bit 15 because of deposit and amount to the draining of drilling rod 14 inner chamber is substantially equal.
Embodiment 4
As shown in Figure 4, similar to the structure of embodiment 1, difference is: described core bit 15 is the two-tube drilling tool of look ahead system, the core-pipe subassembly 21 that existing seabed rig is conventional to be suspended in core bit 15 and to stretch out core bit 15 bit central hole certain distance, one or more seal groove 19 is offered in the bit central hole of core bit 15, be placed with sealing ring 20 in seal groove, getting between in-core pipe and core bit 15 of core-pipe subassembly 21 is sealed by sealing ring 20.

Claims (4)

1. one kind is applicable to the bottom sediment coring device of seabed rig, it is characterized in that: it sets up a pumping piston cylinder on rig basis, existing seabed, it is inner that described pumping piston cylinder is fixedly installed in existing seabed rig, comprise suction cylinder barrel, be sleeved on the pumping piston in suction cylinder barrel and piston rod assembly, piston end cap, sealed by sealing ring between pumping piston and suction inner wall of cylinder, pumping piston bar one end is fixedly connected with pumping piston, the other end creeps into unit head with existing seabed rig or its propulsive mechanism is connected, unit head propulsive mechanism linkage driving is crept into by existing seabed rig, or creep into the direct related driving of unit head by existing seabed rig, with existing seabed rig working method unlike, the other end that this seabed rig creeps into unit head feed pipe is not connect flush water pump, but be connected with one end rodless cavity of described pumping piston cylinder or rod chamber, described pumping piston cylinder does not connect the other end rod chamber of described feed pipe or rodless cavity is then directly communicated with emptying with extraneous seawater, because the piston of described pumping piston cylinder creeps into unit head or the related driving of its propulsive mechanism by existing seabed rig, existing seabed rig is made to creep into unit head while the deposit of promotion existing seabed rig core bit press-in downwards gets core, described pumping piston cylinder creeps into unit head feed pipe by existing seabed rig and draws water from drilling rod and core bit inner chamber, thus realize piston type negative-pressure ward and get core, described feed pipe specifically accesses the rodless cavity of described pumping piston cylinder or rod chamber then depends on itself and the described linked manner creeping into unit head or its propulsive mechanism, principle be when described in creep into unit head promote core bit press-in deposit carry out getting core operation time, described pumping piston cylinder should be drawn water in drilling rod and core bit by feed pipe, for reducing the disturbance of getting core product as far as possible, the water yield that described pumping piston cylinder should be extracted from drilling rod and core bit inner chamber by pumping piston cylinder bore described in Rational choice with enter core bit because of deposit and amount to the draining of drilling rod inner chamber is substantially equal.
2. the bottom sediment coring device being applicable to seabed rig according to claim 1, it is characterized in that: described feed pipe is not directly access described pumping piston cylinder, but be connected with described pumping piston cylinder by a multidirectional changeover switch valve, the another port of described multidirectional changeover switch valve is connected with seabed rig flush water pump, the effect of described multidirectional changeover switch valve switches the connection between feed pipe and pumping piston cylinder and flush water pump, realize deposit to be pressed into suction to get core when feed pipe is connected with pumping piston cylinder through multidirectional changeover switch valve, flush water pump can be exported outwardly seawater open simultaneously, realize common direct circulation to rinse abrasion drill to keep forging ahead core when feed pipe is connected with flush water pump through multidirectional changeover switch valve, by pumping piston cylinder pump orifice, outwardly seawater is open simultaneously.
3. the bottom sediment coring device being applicable to seabed rig according to claim 1 and 2, it is characterized in that: described pumping piston cylinder can replace with water pump, when creeping into unit head promotion core bit press-in deposit and carrying out getting core operation, water pump is utilized to be drawn water in drilling rod and core bit by feed pipe, for reducing the disturbance of getting core product as far as possible, answer choose reasonable water pump size, conservative control water pump start-stop time and pump-out simultaneously, the water yield that water pump is extracted from drilling rod and core bit inner chamber with enter core bit because of deposit and amount to the draining of drilling rod inner chamber is substantially equal.
4. the bottom sediment coring device being applicable to seabed rig according to claim 1,2 and 3, it is characterized in that: described core bit can be single tube drilling tool, two-tube drilling tool or three pipe drilling tools that existing seabed rig is conventional, also can be core plugging notifying mechanism of rope core drilling, when using two-tube or three pipe drilling tool of look ahead system, get the sealing that annular gap between in-core pipe and drilling tool outer tube carries out to a certain degree preferably by certain mode, enter core bit inner chamber to prevent extraneous seawater from the annular gap got between in-core pipe and drilling tool outer tube thus reduce suction and get core effect.
CN201510717338.3A 2015-10-30 2015-10-30 Seafloor sediment coring device applicable to seafloor drilling machine Pending CN105239947A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105604514A (en) * 2016-03-14 2016-05-25 湖南科技大学 Submarine sediment wire line coring drilling tool suitable for submarine drilling rig
CN108979577A (en) * 2018-08-13 2018-12-11 湖南科技大学 Sea bed gas hydrate pressure maintaining wire line coring drilling machine drilling process
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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US20060016621A1 (en) * 2004-06-09 2006-01-26 Placer Dome Technical Services Limited Method and system for deep sea drilling
DE102005006039A1 (en) * 2005-02-07 2006-08-10 Friedrich Abegg Sediment core sub-sampling device for e.g. exploration of sea, has core liner sealed to pressure chamber housing by lip seal, so that increase in pressure pushes piston to hydraulically move sediment core in to transfer line
CN1837770A (en) * 2006-04-24 2006-09-27 浙江大学 A hand-held deep-sea air-tightness isobaric sampler for hydrothermal fluid
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105604514A (en) * 2016-03-14 2016-05-25 湖南科技大学 Submarine sediment wire line coring drilling tool suitable for submarine drilling rig
CN105604514B (en) * 2016-03-14 2018-10-23 湖南科技大学 A kind of bottom sediment cord coring drill suitable for seabed drilling machine
CN108979577A (en) * 2018-08-13 2018-12-11 湖南科技大学 Sea bed gas hydrate pressure maintaining wire line coring drilling machine drilling process
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
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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
EP3640427A4 (en) * 2018-08-13 2021-04-07 Hunan University Of Science And Technology Drilling process of pressure-preserving cable core drilling machine for subsea natural gas hydrates

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Application publication date: 20160113