CN101798924A - Icebound type pressure-maintaining and temperature-preserving sampler - Google Patents

Abstract

Translated fromChinese

本发明涉及一种冰封式保压保温取样器。是由钻进/取样切换机构、冷冻液循环系统、泥浆冰阀和岩心阀原位生成机构、岩心容纳管单动机构和通道I、II、III、IV、V、VI构成；以冻结生成的冰阀和岩心阀代替球阀或板阀等机械阀门关闭取样钻具上下部端口，关闭过程不受孔内固体杂质的影响，可靠性高，解决了现有机械阀门启动困难，易被孔内杂物卡塞而不易关闭等问题，提高了保压可靠性和成功率，且径向尺寸可以较小，有利于获得较大直径的岩心，有利于提高水合物岩心采取率。经实验，冰阀可以实现25MPa的密封，适用于孔内液柱达2500米的水合物钻孔，液动潜孔锤驱动往复泵，利用了泥浆作动力介质，避免了采用电气结构带来的复杂性，简单可靠。

The invention relates to an ice-sealed pressure-preserving and heat-preserving sampler. It is composed of drilling/sampling switching mechanism, refrigerant circulation system, mud ice valve and core valve in-situ generating mechanism, core containing tube single-action mechanism and channels I, II, III, IV, V, VI; generated by freezing Ice valves and core valves replace mechanical valves such as ball valves or plate valves to close the upper and lower ports of the sampling drilling tool. The closing process is not affected by solid impurities in the hole and has high reliability. It improves the reliability and success rate of pressure holding, and the radial dimension can be smaller, which is conducive to obtaining larger diameter cores and improving the recovery rate of hydrate cores. According to experiments, the ice valve can achieve 25MPa sealing, which is suitable for hydrate drilling with a liquid column up to 2500 meters in the hole. The hydraulic submersible hammer drives the reciprocating pump and uses mud as the power medium, avoiding the use of electrical structures. Sophisticated, simple and reliable.

Description

Translated fromChinese

冰封式保压保温取样器Ice-packed pressure-preserving and heat-preserving sampler

技术领域：Technical field:

本发明涉及一种钻探取样机具，尤其是天然气水合物钻探取样用的保压保温取样钻具。The invention relates to a drilling and sampling tool, in particular to a pressure-preserving and heat-retaining sampling drilling tool for natural gas hydrate drilling and sampling.

背景技术Background technique

天然气水合物具有分布广、储量巨大、能量密度高等特点，是人类未来的潜在洁净新能源，对全球环境和海洋钻井生产安全有重要影响。专家初步估算我国天然气水合物蕴含的总能量约为境内已知石油、天然气和煤炭能量之和的1倍以上，勘探开发天然气水合物意义重大。Natural gas hydrate has the characteristics of wide distribution, huge reserves, and high energy density. It is a potential clean new energy for human beings in the future, and has an important impact on the global environment and the safety of marine drilling production. Experts preliminarily estimate that the total energy contained in natural gas hydrates in my country is more than twice the sum of the energy of known oil, natural gas and coal in the country. The exploration and development of natural gas hydrates is of great significance.

天然气水合物的特殊形态决定了其稳定存在需要高压低温条件，要求钻探取样钻具具有保压保温功能。国内外现有保压钻具采用球阀或板阀等机械结构关闭取样钻具下部端口，从而实现保压功能，存在的突出问题是，球阀或板阀常常难以正常关闭，从而不能正常发挥保压功能，发挥保压功能的次数占总取样次数的比例不到60％，可靠性差；而且，球阀或板阀在设计上占用较大的径向尺寸，因而天然气水合物岩心直径较小而容易被破坏，造成岩心采取率较低，往往不到50％，不能很好地满足天然气水合物勘探要求和科学研究需要。The special form of natural gas hydrate determines that its stable existence requires high-pressure and low-temperature conditions, and the drilling tools for drilling and sampling are required to have the function of maintaining pressure and heat preservation. The existing pressure-holding drilling tools at home and abroad use mechanical structures such as ball valves or plate valves to close the lower port of the sampling drilling tool, so as to realize the pressure-holding function. The outstanding problem is that the ball valve or plate valve is often difficult to close normally, so that the pressure-holding cannot be performed normally. function, the number of times the function of maintaining pressure accounts for less than 60% of the total sampling times, and the reliability is poor; moreover, the ball valve or plate valve occupies a large radial dimension in design, so the diameter of the gas hydrate core is small and it is easy to be Destruction, resulting in a low core recovery rate, often less than 50%, which cannot well meet the requirements of gas hydrate exploration and scientific research.

发明内容：Invention content:

本发明的目的就在于针对上述现有技术的不足，提供一种具有良好保压保温功能的冰封式保压保温取样器。The object of the present invention is to address the above-mentioned deficiencies in the prior art, and provide an ice-sealed pressure-preserving and heat-preserving sampler with good pressure-preserving and heat-preserving functions.

本发明的目的是通过以下技术方案实现的：The purpose of the present invention is achieved through the following technical solutions:

冰封式保压保温取样器，是由钻进/取样切换机构、冷冻液循环系统、泥浆冰阀和岩心阀原位生成机构、岩心容纳管单动机构和通道I、II、III、IV、V、VI构成；The ice-sealed pressure-preserving and heat-preserving sampler is composed of a drilling/sampling switching mechanism, a refrigerant circulation system, a mud ice valve and a core valve in-situ generating mechanism, a single-action mechanism for a core holding tube and channels I, II, III, IV, V, VI composition;

钻进/取样切换机构：是由异径接头1通过螺纹与分流阀座2连接，分流阀座2通过螺纹与折返接头8连接，折返接头8通过螺纹与外管17连接，分流阀阀心6插入分流阀座2并通过挡圈3和分流阀弹簧7定位；Drilling/sampling switching mechanism: the different-diameter joint 1 is connected to thediverter valve seat 2 through threads, thediverter valve seat 2 is connected to thereturn joint 8 through threads, thereturn joint 8 is connected to the outer pipe 17 through threads, and thediverter valve core 6 Insertdiverter valve seat 2 and position it by retainingring 3 anddiverter valve spring 7;

冷冻液循环系统：是由外缸14插入折返接头8内并用密封圈密封，外缸14通过螺纹与外泵体20连接，下缸盖16、缸体13、上缸盖12、射流元件11及垫片10自下而上依次插入外缸14中并在需要位置用密封圈密封，潜孔锤上接头9通过螺纹连接到外缸14的最上部，潜孔锤活塞15沿缸体13、下缸盖16、外泵体20内壁滑动形成滑动副，往复泵活塞18与外泵体20间用密封圈密封，内泵体22、排液阀阀座25、进液阀阀座28自上而下依次插入外泵体20中并通过外泵体20的凸台进行定位，排液阀阀心24插入到排液阀阀座25中形成滑动副，进液阀阀心27插入到进液阀阀座28中形成滑动副，冷冻液保温容器32通过螺纹连接到外泵体20上，吸液管30通过螺纹连接到进液阀阀座28上，上外循环管29、上内循环管31通过螺纹连接到外泵体20上；Refrigerating liquid circulation system: the outer cylinder 14 is inserted into thereturn joint 8 and sealed with a sealing ring, the outer cylinder 14 is connected with the outer pump body 20 through threads, the lower cylinder head 16, thecylinder body 13, the upper cylinder head 12, the jet element 11 and the The gasket 10 is inserted into the outer cylinder 14 sequentially from bottom to top and sealed with a sealing ring at the required position. Theupper joint 9 of the down-the-hole hammer is connected to the uppermost part of the outer cylinder 14 through threads. The cylinder head 16 and the inner wall of the outer pump body 20 slide to form a sliding pair. The reciprocatingpump piston 18 and the outer pump body 20 are sealed with a sealing ring. The bottom is inserted into the outer pump body 20 in turn and positioned by the boss of the outer pump body 20. The valve core 24 of the discharge valve is inserted into the seat 25 of the discharge valve to form a sliding pair, and the valve core 27 of the inlet valve is inserted into the inlet valve. A sliding pair is formed in the valve seat 28, the cooling liquidheat preservation container 32 is connected to the outer pump body 20 by threads, theliquid suction pipe 30 is connected to the valve seat 28 of the inlet valve by threads, the upperouter circulation pipe 29, the upperinner circulation pipe 31 Connected to the outer pump body 20 by threads;

泥浆冰阀和岩心阀原位生成机构：是由上部冰阀生成机构，岩心容纳管上部的排水杆34插入带有内部环槽的循环管接头33中，并通过螺纹连接，且在循环管接头与排水杆用密封圈密封；下部“岩心阀”生成机构，下外循环管40、下内循环管41通过螺纹连接到循环管接头33上，下端盖44通过螺纹连接到下外循环管40上，且其与岩心容纳管下端42连接处用密封圈密封；Mud ice valve and core valve in-situ generating mechanism: it is the upper ice valve generating mechanism, thedrainage rod 34 on the upper part of the core containing pipe is inserted into thecirculation pipe joint 33 with an internal ring groove, and is connected by thread, and the circulation pipe joint It is sealed with the drain rod with a sealing ring; the lower "core valve" generating mechanism, the lowerexternal circulation pipe 40 and the lowerinternal circulation pipe 41 are connected to thecirculation pipe joint 33 through threads, and thelower end cover 44 is connected to the lowerexternal circulation pipe 40 through threads , and its connection with thelower end 42 of the core holding pipe is sealed with a sealing ring;

岩心容纳管单动机构：是由推力轴承37套在排水杆上，并由球阀座39和岩心容纳管上接头36固定，球阀座与排水杆下端通过螺纹连接，且在岩心容纳管上接头内侧用Yx密封圈密封。The single-action mechanism of the rock core holding pipe: the thrust bearing 37 is set on the drain rod, and is fixed by theball valve seat 39 and theupper joint 36 of the rock core holding pipe. Seal with Yx seals.

本发明的目的还可以通过以下技术方案实现：The purpose of the present invention can also be achieved through the following technical solutions:

通道I是由分流阀座2贯通孔道与折返接头8内通道，外管17与相邻循环管够成的环状间隙组成。Channel I is made up of the through channel of thediverter valve seat 2 and the inner channel of the turn-back joint 8, the outer tube 17 and the annular gap formed by the adjacent circulation tube.

通道II：由分流阀座2的贯通孔道及潜孔锤上接头9和垫片10的中心孔道组成。Channel II: It consists of the through channel of thediverter valve seat 2 and the central channel of the joint 9 of the down-the-hole hammer and the gasket 10.

通道III：由内泵体22的径向通孔，外泵体20的贯通孔道，上内循环管31和冷冻液保温容器32构成的环状间隙，循环管接头33的内环状内腔和贯通孔道，下内循环管41和岩心容纳管42构成的环状间隙组成。Channel III: the radial through hole of the inner pump body 22, the through hole of the outer pump body 20, the annular gap formed by the upperinner circulation pipe 31 and the coolingliquid insulation container 32, the inner annular cavity of thecirculation pipe joint 33 and Through the tunnel, the lowerinternal circulation pipe 41 and the annular gap formed by thecore holding pipe 42 are composed.

通道IV：由进液阀阀座28的贯通孔道，外泵体20的贯通孔道，上外循环管29和上内循环管31构成的环状间隙，循环管接头33的贯通孔道，下外循环管40和下内循环管41构成的环状间隙组成。Channel IV: the through hole of the inlet valve seat 28, the through hole of the outer pump body 20, the annular gap formed by the upperouter circulation pipe 29 and the upperinner circulation pipe 31, the through hole of thecirculation pipe joint 33, the lower outer circulation The annular gap formed bypipe 40 and lowerinternal circulation pipe 41 is composed.

通道V：由排水杆34的中心孔道和循环管接头33的径向通孔组成。Channel V: composed of the central channel of thedrain rod 34 and the radial through hole of thecirculation pipe joint 33 .

通道VI：由折返接头8的径向通孔组成。Channel VI: consists of the radial through-holes of thereturn joint 8 .

有益效果：本发明改变现有的保压取样钻具的设计思路，以冻结生成的冰阀和岩心阀代替球阀或板阀等机械阀门关闭取样钻具上下部端口，不需要精密的配合表面，关闭过程不受孔内固体杂质的影响，可靠性高，解决了现有机械阀门启动困难、配合表面精密度高、容易被孔内杂物卡塞而不易关闭等问题，提高了保压可靠性和成功率，且径向尺寸可以较小，有利于获得较大直径的岩心，从而有利于提高水合物岩心采取率。实验结果表明，冰阀可以可靠实现25MPa的密封，因此采用冰阀结构适用于孔内液柱达2500米的水合物钻孔，完全可以满足在我国海洋和陆地永冻带水合物钻井取样对密封压力的要求。在地面制作低温冷冻液并将其存放于钻具中的冷冻液保温容器中，当需要保压取样时，启动潜孔往复泵驱动冷冻液循环，冷冻液流经循环管接头下部环槽时，对岩心容纳管上部排水杆内的泥浆有冷却作用，逐渐将其冻结形成泥浆冰阀，冷冻液继续下行在岩心容纳管下端通过换热窗口冷却岩心根部一小段，将其与泥浆冻结形成岩心阀，从而实现密封保压，免去了干冰在钻具内的存放和与酒精的混合过程，有利于腾出径向尺寸增大岩心直径；冷冻液的存放可以充分利用钻具的轴向尺寸，存放量容易做到完全充足，保证制作做够长、温度足够低的泥浆冰阀和岩心阀需要；冷冻液循环时间可控并且可多次启动和中止循环，可保证泥浆冰阀和岩心阀从孔底到地面始终可靠存在和有效密封，所有这些特点可以有效保证天然气水合物保压取样的成功率和岩心采取率。采用液动潜孔锤驱动往复泵，充分利用了泥浆作为动力介质，避免了采用电气结构带来的复杂性，简单可靠。Beneficial effects: the present invention changes the design idea of the existing pressure-holding sampling drilling tool, replaces mechanical valves such as ball valves or plate valves with ice valves and core valves generated by freezing to close the upper and lower ports of the sampling drilling tool, and does not require precise matching surfaces. The closing process is not affected by solid impurities in the hole, and the reliability is high. It solves the problems of the existing mechanical valves, such as difficulty in starting, high precision of the matching surface, easy to be blocked by debris in the hole and difficult to close, etc., and improves the reliability of pressure holding. and the success rate, and the radial size can be smaller, which is beneficial to obtain a larger diameter core, thereby helping to improve the recovery rate of hydrate cores. The experimental results show that the ice valve can reliably achieve a seal of 25MPa. Therefore, the ice valve structure is suitable for hydrate drilling with a liquid column in the hole of 2500 meters, which can fully meet the sealing requirements of hydrate drilling sampling in my country's oceans and land permafrost zones. pressure requirements. Make low-temperature freezing liquid on the ground and store it in the cooling liquid insulation container in the drilling tool. When it is necessary to maintain pressure and take samples, start the submersible reciprocating pump to drive the cooling liquid circulation. When the cooling liquid flows through the lower ring groove of the circulation pipe joint, It has a cooling effect on the mud in the drain rod on the upper part of the core holding pipe, and gradually freezes it to form a mud ice valve. The freezing liquid continues to descend at the lower end of the core holding pipe through the heat exchange window to cool a short section of the root of the core, and freezes it with the mud to form a core valve. , so as to achieve sealing and pressure maintenance, eliminating the storage of dry ice in the drilling tool and the mixing process with alcohol, which is conducive to freeing up the radial dimension to increase the core diameter; the storage of refrigerant can make full use of the axial dimension of the drilling tool, The storage capacity is easy to be completely sufficient to ensure the production of mud ice valves and core valves that are long enough and low enough in temperature; the cycle time of the refrigerant is controllable and the cycle can be started and stopped multiple times to ensure that the mud ice valves and core valves are kept from There is always reliable existence and effective sealing from the bottom of the hole to the surface. All these features can effectively ensure the success rate of gas hydrate pressure-holding sampling and the rate of core recovery. The hydraulic down-the-hole hammer is used to drive the reciprocating pump, which makes full use of the mud as the power medium, avoids the complexity brought by the electrical structure, and is simple and reliable.

附图说明：Description of drawings:

附图1为冰封式保压保温取样器结构图Accompanying drawing 1 is the structural diagram of ice-packed pressure-preserving and heat-preserving sampler

附图2为附图1A-A剖面射流元件断面图。Accompanyingdrawing 2 is a sectional view of the jet element in the section A-A of the accompanying drawing 1.

1异径接头，2分流阀座，3挡圈，4弹子球，5丝堵，6分流阀阀心，7分流阀弹簧，8折返接头，9潜孔锤上接头，10垫片，11射流元件，12上缸盖，13缸体，14外缸，15潜孔锤活塞，16下缸盖，17外管，18往复泵活塞，19刮尘圈，20外泵体，21堵头，22内泵体，23排液阀弹簧，24排液阀阀心，25排液阀阀座，26进液阀弹簧，27进液阀阀心，28进液阀阀座，29上外循环管，30吸液管，31上内循环管，32冷冻液保温容器，33循环管接头，34排水杆35密封圈，36岩心容纳管上接头，37推力轴承，38球阀，39球阀座，40下外循环管，41下内循环管，42岩心容纳管，43螺旋内腔，44下端盖，45钻头1 different diameter joint, 2 diverter valve seat, 3 retaining ring, 4 pinball, 5 plug, 6 diverter valve core, 7 diverter valve spring, 8 return joint, 9 down-the-hole hammer upper joint, 10 gasket, 11 jet Components, 12 Upper cylinder head, 13 Cylinder body, 14 Outer cylinder, 15 DTH hammer piston, 16 Lower cylinder head, 17 Outer pipe, 18 Reciprocating pump piston, 19 Scraper ring, 20 Outer pump body, 21 Plug, 22 Inner pump body, 23 discharge valve spring, 24 discharge valve core, 25 discharge valve seat, 26 inlet valve spring, 27 inlet valve core, 28 inlet valve seat, 29 upper external circulation pipe, 30 suction pipe, 31 upper internal circulation pipe, 32 cooling liquid insulation container, 33 circulation pipe joint, 34drain rod 35 sealing ring, 36 rock core holding pipe upper joint, 37 thrust bearing, 38 ball valve, 39 ball valve seat, 40 lower outer Circulation pipe, 41 lower internal circulation pipe, 42 rock core holding pipe, 43 spiral inner cavity, 44 lower end cover, 45 drill bit

I-正常钻进时的泥浆通道；II-高压泥浆进入潜孔往复泵的通道；III-低温冷冻液流向下内循环管41下端的通道；IV-冷冻液从下内循环管41下端流回冷冻液保温容器的通道；V-岩芯管回水通道；VI-低压泥浆从射流元件排空孔流向钻具与井壁环状间隙的通道。I-the mud channel during normal drilling; II-the channel where the high-pressure mud enters the submersible reciprocating pump; III-the channel where the low-temperature refrigerant flows to the lower end of the lowerinternal circulation pipe 41; IV-the refrigerant flows back from the lower end of the lowerinternal circulation pipe 41 The channel of the cooling liquid insulation container; V-core tube return water channel; VI-the channel for low-pressure mud to flow from the emptying hole of the jet element to the annular gap between the drilling tool and the well wall.

具体实施方式：Detailed ways:

下面结合附图和实施例作进一步详细说明：Below in conjunction with accompanying drawing and embodiment describe in further detail:

附图1a的右端接附图1b的左端构成完整的冰封式保压保温取样器。The right end of accompanying drawing 1a is connected with the left end of accompanying drawing 1b to form a complete ice-sealed pressure-preserving and heat-preserving sampler.

冰封式保压保温取样器，是由钻进/取样切换机构、冷冻液循环系统、泥浆冰阀和岩心阀原位生成机构、岩心容纳管单动机构和通道I、II、III、IV、V、VI构成；The ice-sealed pressure-preserving and heat-preserving sampler is composed of a drilling/sampling switching mechanism, a refrigerant circulation system, a mud ice valve and a core valve in-situ generating mechanism, a single-action mechanism for a core holding tube and channels I, II, III, IV, V, VI composition;

钻进/取样切换机构：是由异径接头1通过螺纹与分流阀座2连接，分流阀座2通过螺纹与折返接头8连接，折返接头8通过螺纹与外管17连接，分流阀阀心6插入分流阀座2并通过挡圈3和分流阀弹簧7定位；Drilling/sampling switching mechanism: the different-diameter joint 1 is connected to thediverter valve seat 2 through threads, thediverter valve seat 2 is connected to thereturn joint 8 through threads, thereturn joint 8 is connected to the outer pipe 17 through threads, and thediverter valve core 6 Insertdiverter valve seat 2 and position it by retainingring 3 anddiverter valve spring 7;

冷冻液循环系统：是由外缸14插入折返接头8内并用密封圈密封，外缸14通过螺纹与外泵体20连接，下缸盖16、缸体13、上缸盖12、射流元件11及垫片10自下而上依次插入外缸14中并在需要位置用密封圈密封，潜孔锤上接头9通过螺纹连接到外缸14的最上部，潜孔锤活塞15沿缸体13、下缸盖16、外泵体20内壁滑动形成滑动副，往复泵活塞18与外泵体20间用密封圈密封，内泵体22、排液阀阀座25、进液阀阀座28自上而下依次插入外泵体20中并通过外泵体20的凸台进行定位，排液阀阀心24插入到排液阀阀座25中形成滑动副，进液阀阀心27插入到进液阀阀座28中形成滑动副，冷冻液保温容器32通过螺纹连接到外泵体20上，吸液管30通过螺纹连接到进液阀阀座28上，上外循环管29、上内循环管31通过螺纹连接到外泵体20上；Refrigerating liquid circulation system: the outer cylinder 14 is inserted into thereturn joint 8 and sealed with a sealing ring, the outer cylinder 14 is connected with the outer pump body 20 through threads, the lower cylinder head 16, thecylinder body 13, the upper cylinder head 12, the jet element 11 and the The gasket 10 is inserted into the outer cylinder 14 sequentially from bottom to top and sealed with a sealing ring at the required position. Theupper joint 9 of the down-the-hole hammer is connected to the uppermost part of the outer cylinder 14 through threads. The cylinder head 16 and the inner wall of the outer pump body 20 slide to form a sliding pair. The reciprocatingpump piston 18 and the outer pump body 20 are sealed with a sealing ring. The bottom is inserted into the outer pump body 20 in turn and positioned by the boss of the outer pump body 20. The valve core 24 of the discharge valve is inserted into the seat 25 of the discharge valve to form a sliding pair, and the valve core 27 of the inlet valve is inserted into the inlet valve. A sliding pair is formed in the valve seat 28, the cooling liquidheat preservation container 32 is connected to the outer pump body 20 by threads, theliquid suction pipe 30 is connected to the valve seat 28 of the inlet valve by threads, the upperouter circulation pipe 29, the upperinner circulation pipe 31 Connected to the outer pump body 20 by threads;

泥浆冰阀和岩心阀原位生成机构：是由上部冰阀生成机构，岩心容纳管上部的排水杆34插入带有内部环槽的循环管接头33中，并通过螺纹连接，且在循环管接头与排水杆用密封圈密封；下部泥浆冰阀和岩心阀生成机构，下外循环管40、下内循环管41通过螺纹连接到循环管接头33上，下端盖44通过螺纹连接到下外循环管40上，且其与岩心容纳管下端42连接处用密封圈密封；Mud ice valve and core valve in-situ generating mechanism: it is the upper ice valve generating mechanism, thedrainage rod 34 on the upper part of the core containing pipe is inserted into the circulation pipe joint 33 with an internal ring groove, and is connected by thread, and the circulation pipe joint It is sealed with the drain rod with a sealing ring; the lower mud ice valve and core valve generating mechanism, the lowerexternal circulation pipe 40 and the lowerinternal circulation pipe 41 are connected to the circulation pipe joint 33 by threads, and thelower end cover 44 is connected to the lower external circulation pipe bythreads 40, and its connection with thelower end 42 of the rock core holding pipe is sealed with a sealing ring;

岩心容纳管单动机构：是由推力轴承37套在排水杆上，并由球阀座39和岩心容纳管上接头36固定，球阀座与排水杆下端通过螺纹连接，且在岩心容纳管上接头内侧用Yx密封圈密封。The single-action mechanism of the rock core holding pipe: thethrust bearing 37 is set on the drain rod, and is fixed by theball valve seat 39 and the upper joint 36 of the rock core holding pipe. Seal with Yx seals.

通道I：由分流阀座2贯通孔道及折返接头8内通道，外管17与相邻循环管够成的环状间隙组成。Channel I: It is composed of the through hole of thediverter valve seat 2 and the inner channel of the return joint 8, and the annular gap formed by the outer tube 17 and the adjacent circulation tube.

通道II：由分流阀座2的贯通孔道及潜孔锤上接头9和垫片10的中心孔道组成。Channel II: It consists of the through channel of thediverter valve seat 2 and the central channel of thejoint 9 of the down-the-hole hammer and the gasket 10.

通道III：由内泵体22的径向通孔，外泵体20的贯通孔道，上内循环管31和冷冻液保温容器32构成的环状间隙，循环管接头33的内环状内腔和贯通孔道，下内循环管41和岩心容纳管42构成的环状间隙组成。Channel III: the radial through hole of the inner pump body 22, the through hole of the outer pump body 20, the annular gap formed by the upperinner circulation pipe 31 and the coolingliquid insulation container 32, the inner annular cavity of the circulation pipe joint 33 and Through the tunnel, the lowerinternal circulation pipe 41 and the annular gap formed by thecore holding pipe 42 are composed.

通道IV：由进液阀阀座28的贯通孔道，外泵体20的贯通孔道，上外循环管29和上内循环管31构成的环状间隙，循环管接头33的贯通孔道，下外循环管40和下内循环管41构成的环状间隙组成。Channel IV: the through hole of the inlet valve seat 28, the through hole of the outer pump body 20, the annular gap formed by the upperouter circulation pipe 29 and the upperinner circulation pipe 31, the through hole of the circulation pipe joint 33, the lower outer circulation The annular gap formed bypipe 40 and lowerinternal circulation pipe 41 is composed.

通道V：由排水杆34的中心孔道和循环管接头33的径向通孔组成。Channel V: composed of the central channel of thedrain rod 34 and the radial through hole of the circulation pipe joint 33 .

通道VI：由折返接头8的径向通孔组成。Channel VI: consists of the radial through-holes of thereturn joint 8 .

正常钻进时：分流阀阀心6的中心孔道打开，在分流阀弹簧7作用下分流阀阀心6位于上位，低温泥浆通过通道I进入孔底，冷却钻头，携带岩粉上返。岩心容纳管在单动机构的作用下保持相对不动，保护进入岩心容纳管的天然气水合物岩样，岩心容纳管内进入的泥浆通过通道V排出。During normal drilling: the central channel of thediverter valve spool 6 is opened, and thediverter valve spool 6 is positioned at the upper position under the action of thediverter valve spring 7, and the low-temperature mud enters the bottom of the hole through the channel 1, cools the drill bit, and carries the rock powder back up. The core holding tube remains relatively stationary under the action of the single-action mechanism to protect the natural gas hydrate rock sample entering the core holding tube, and the mud entering the core holding tube is discharged through the channel V.

保压取心时：停钻，投入弹子球4，使分流阀阀心6中心孔道关闭，开泵，在冲洗液压力作用下压缩分流阀弹簧7，使分流阀阀心6位于下位，通道I关闭而通道II打开，流入通道II内的冲洗液进入射流元件11，进行附壁和切换，从而驱动潜孔锤活塞15带动往复泵活塞18往复运动，往复泵活塞18的往复运动带动进液阀和排液阀的交替开闭，从而驱动冷冻液保温容器32内的冷冻液进入循环通道III和IV，冷冻液进入循环管接头内的环形内腔，可使排水杆内的液体形成冰阀，实现岩心容纳管上端密封，而随着冷冻液在通道III中的继续下行，在下内循环管41的底部和岩心容纳管下部内腔处，将一小段岩心与泥浆冻结生成“岩心阀”封堵岩心容纳管下端，从而保证岩心容纳管内的高压环境。进入射流元件的冲洗液在驱动活塞完成往复运动后通过通道VI进入外管17和孔壁的环状间隙上返至地表，不会对岩心容纳管42处造成影响。最后提钻取样，将钻头45和外管17、下端盖44和下外循环管40和下内循环管41依次卸下，然后将排水杆34从循环管接头33拧下即可将岩心容纳管取出。保压观测分析后，通过加热使岩心阀消融，将岩心倒出。岩心容纳管内亦可安装众所周知的半合管，卸开岩心容纳管上接头36与岩心容纳管42之间的螺纹，可容易地将半合管与岩心取出。During pressure-holding coring: stop drilling, put in pinball 4, close the central channel of diverter valve core 6, turn on the pump, compress diverter valve spring 7 under the pressure of flushing fluid, make diverter valve valve core 6 in the lower position, channel I When channel II is closed and channel II is opened, the flushing liquid flowing into channel II enters the jet element 11 for wall attachment and switching, thereby driving the down-the-hole hammer piston 15 to drive the reciprocating pump piston 18 to reciprocate, and the reciprocating motion of the reciprocating pump piston 18 drives the liquid inlet valve Alternate opening and closing of the discharge valve and the liquid discharge valve, thereby driving the refrigerant liquid in the refrigerant liquid insulation container 32 to enter the circulation channels III and IV, and the refrigerant liquid enters the annular inner cavity in the circulation pipe joint, so that the liquid in the drain rod can form an ice valve, Realize the sealing of the upper end of the core holding pipe, and as the refrigerant continues to descend in the channel III, a small section of core and mud are frozen at the bottom of the lower internal circulation pipe 41 and the lower inner cavity of the core holding pipe to form a "core valve" to block The lower end of the rock core holding pipe ensures the high-pressure environment in the rock core holding pipe. The flushing liquid entering the jet element enters the annular gap between the outer tube 17 and the hole wall through the channel VI after the driving piston completes the reciprocating motion and returns to the surface without affecting thecore holding tube 42 . Finally, the drill is lifted for sampling, thedrill bit 45 and the outer pipe 17, thelower end cover 44, the lowerouter circulation pipe 40 and the lowerinner circulation pipe 41 are successively unloaded, and then thedrain rod 34 is unscrewed from the circulation pipe joint 33 to remove the core holding pipe. take out. After pressure-holding observation and analysis, the core valve is ablated by heating, and the core is poured out. Also can install well-known half close pipe in the rock core holding pipe, unload the screw thread between the joint 36 on the rock core holding pipe and the rockcore holding pipe 42, half close pipe and rock core can be taken out easily.

Claims (7)

1. an Icebound type pressure-maintaining and temperature-preserving sampler is characterized in that, is to constitute by creeping into/take a sample switching mechanism, the freezing liquid circulating system, mud ice valve and rock core valve original position generation mechanism, rock core containing pipe single action mechanism and passage I, II, III, IV, V, VI;

---creep into/take a sample switching mechanism: be to be connected with shunting valve seat (2) by screw thread by reducing joint (1), shunting valve seat (2) is connected with the joint of turning back (8) by screw thread, the joint (8) of turning back is connected with outer tube (17) by screw thread, and flow divider valve core (6) inserts shunting valve seat (2) and locatees by back-up ring (3) and flow divider spring (7);

---the freezing liquid circulating system: be to insert in the joint (8) of turning back and by outer shell (14) to seal with sealing ring, outer shell (14) is connected with the outer pump housing (20) by screw thread, following cylinder cap (16), cylinder body (13), upper cylinder cover (12), fluidic (11) and pad (10) insert successively from bottom to top in the outer shell (14) and in the needs position and seal with sealing ring, down-the-hole hammer top connection (9) is by being threaded onto the topmost of outer shell (14), down-the-hole hammer piston (15) is along cylinder body (13), following cylinder cap (16), the outer pump housing (20) inwall slides and forms sliding pair, seal with sealing ring between the reciprocating piston pump (18) and the outer pump housing (20), inner pump (22), tapping valve valve seat (25), feed liquor valve base (28) inserts in the outer pump housing (20) also from top to bottom successively, and the boss by the outer pump housing (20) positions, tapping valve valve core (24) is inserted into and forms sliding pair in the tapping valve valve seat (25), feed liquor valve valve core (27) is inserted into and forms sliding pair in the feed liquor valve base (28), freezing liquid cool-bag (32) is by being threaded onto on the outer pump housing (20), pipette (30) is by being threaded onto on the feed liquor valve base (28) last outer circulating tube (29), last inner circulating tube (31) is by being threaded onto on the outer pump housing (20);

---mud ice valve and rock core valve original position generate mechanism: be to generate mechanism by top ice valve, the draining bar (34) on rock core containing pipe top inserts and has in the circulation pipe joint (33) of inner annular groove, and by being threaded, and seal with sealing ring at circulation pipe joint and draining bar; Following outer circulating tube (40), down inner circulating tube (41) is by being threaded onto on the circulation pipe joint (33), and bottom end cover (44) is by being threaded onto down on the outer circulating tube (40), and itself and junction, rock core containing pipe lower end (42) seal with sealing ring;

---rock core containing pipe single action mechanism: be to be enclosed within on the draining bar by thrust bearing (37), and it is fixing by ball valve seat (39) and rock core containing pipe top connection (36), ball valve seat and draining bar lower end be by being threaded, and inboard with the sealing of Yx sealing ring in the top connection of rock core containing pipe.

2. according to the described Icebound type pressure-maintaining and temperature-preserving sampler of claim 1, it is characterized in that passage I is connected the duct and turned back joint (8) internal channel by shunting valve seat (2), outer tube (17) is formed with the annular gap that the adjacent circulation pipe enough becomes.

3. according to the described Icebound type pressure-maintaining and temperature-preserving sampler of claim 1, it is characterized in that passage II: (central duct of 20 perforation duct and down-the-hole hammer top connection (9) and pad (10) is formed by the shunting valve seat.

4. according to the described Icebound type pressure-maintaining and temperature-preserving sampler of claim 1, it is characterized in that, passage III: by the radial direction through hole of inner pump (22), the perforation duct of the outer pump housing (20), the annular gap that last inner circulating tube (31) and freezing liquid cool-bag (32) constitute, the interior ring-type inner chamber of circulation pipe joint (33) and perforation duct, the annular gap that following inner circulating tube (41) and rock core containing pipe (42) constitute is formed.

5. according to the described Icebound type pressure-maintaining and temperature-preserving sampler of claim 1, it is characterized in that, passage IV: by the perforation duct of feed liquor valve base (28), the perforation duct of the outer pump housing (20), the annular gap that last outer circulating tube (29) and last inner circulating tube (31) constitute, the perforation duct of circulation pipe joint (33), the annular gap that following outer circulating tube (40) and following inner circulating tube (41) constitute is formed.

6. according to the described Icebound type pressure-maintaining and temperature-preserving sampler of claim 1, it is characterized in that passage V: form by the central duct of draining bar (34) and the radial direction through hole of circulation pipe joint (33).

7. according to the described Icebound type pressure-maintaining and temperature-preserving sampler of claim 1, it is characterized in that passage VI: the radial direction through hole by the joint of turning back (8) is formed.

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