Jilin University

Youhong Sun

Wei Guo

Ke Gao

Chen Chen

Baochang Liu

Ting Wang

Yanji Chen

Nan Zhang

Zhigang Wang

Zhao Liu

Jun Xue

Da Gong

Xiaopeng Fan

Pavel Talalay

Rusheng Wang

Sunhua Deng

Qiang Li

Yang Yang

Bing Li

Hui Liu

Yan Zhao

Huiwen Xu

Xiaochu Wang

Qinghua Wang

Rui Jia

Jianhua Lv

Yafei Wang

Jianguo Zhao

Jiangpeng Zhao

Haiyong Wang

Zupei Zhang

Guosheng Li

Wei Liu

Saiyu Peng

Yunchen Liu

Valery Konstantinovich Chistyakov

Hangkai Chen

Xiaohui Weng

Renchu Guan

Lidong Xing

Jialin Hong

Yingchao Xu

An Liu

Wei Han

Lopatin Vladimir

Jixin Wang

Tianlong Lei

Jianhua Wang

Martemyannov Sergey

Bukharkin Andrey

Yuan Wang

Chaofan Zhu

Kun Bo

Zhiyong Chang

Lili Ren

Jun Xie

Xiaobo Xie

Zuoan Yuan

The present disclosure provides a self-generating heat process for in-situ converting medium-low mature and organic-rich shale, and relates to the field of in-situ mining of medium-low mature shale rich in organic matter, the self-generating heat process mainly comprises the following steps: locally preheating the vincinity of an injection well of medium-low mature and organic-rich shale formation with well-reformed reservoir and injecting ambient temperature air into the preheated formation to excite and establish a chemical reaction zone composed of a residue zone, an autogenous heat zone, a thermal cracking zone and a preheating zone. Heat is released by oxidation reaction of residues generated after kerogen thermal cracking, so as to realize convection heating of medium-low mature and organic-rich shale formation. Oil and gas products generated from kerogen thermal cracking enter production wells through fractures and are lifted to the ground surface. Because the in-situ oil shale conversion technology only needs local preheating the vincinity of the injection well and only a small amount of external heat or combustibles injection, the related cost is low.

Self-generating heat process for in-situ conversion of medium-low mature and organic-rich shale

An embedded bionic winch for sampling and exploration of a polar sub-glacial lake, including an actuating chamber, a power chamber, a transition chamber, a sensor chamber, a cable arranging chamber and a slip ring chamber, where the actuating chamber, the power chamber, the transition chamber, the sensor chamber, the cable arranging chamber and the slip ring chamber are arranged in sequence, and are coaxially connected; the power chamber provides a power for the winch, and realizes sealing of motors located therein under water with a certain depth; the transition chamber realizes a power transmission between the power chamber and the cable arranging chamber; the sensor chamber is used for mounting of a tension sensor; the cable arranging chamber realizes retraction and release of a cable through the precise cooperation of a drum and a lead screw, and the slip ring chamber contains a slip ring.

Embedded bionic winch for sampling and exploration of polar sub-glacial lake

The present disclosure discloses a hoisting cable with small diameter, high strength, and high flexibility, including an inner conductive core, an insulating layer, an outer conductive wire layer, a tensile layer, and an outer protective layer. The insulating layer is located at an outer side of the inner conductive core and provides insulation between the inner and outer conductors; the outer conductive wire layer is located at an outer side of the insulating layer; the tensile layer is located at an outer side of the outer conductive wire layer; and the outer protective layer is located at an outer side of the tensile layer. The high tensile strength can ensure the safety of hoisting operations, and the small diameter, small bend radius, and high flexibility can ensure the minimization design and the large rope capacity of a winch.

Manufacturing method of a hoisting cable with small diameter, high strength, and high flexibility

The present application discloses a gas logging system, including a degasser configured to degas a sample to separate a gas to be tested; and a detector connected to the degasser and configured to receive the gas to be tested separated by the degasser and perform detection, where the degasser comprises a degassing cover, the degassing cover includes a spherical crown disk surface and a plurality of semipermeable membrane degassing units on the spherical crown disk surface, wherein the plurality of semipermeable membrane degassing units are arranged on the spherical crown disk surface according to the Fibonacci Spiral Rule. The gas logging system provided by the present application may improve the distribution uniformity of a drilling fluid on the degassing cover while increasing arrangement number, and reduce the impact on semipermeable membrane degassing units.

Gas logging system

The present invention relates to a downhole drilling tool system of torque self-balancing and belongs to a technical field of drilling engineering equipment. The drilling tool system consists of an assembly of internal and external drill bits, power components, a pressure adjustment system for internal and external drill bits, a mud circulating system, and an unfreezing system. The present invention employs a dual drill bit of internal and external drill bits to crush rocks by inverse rotations, which realizes the drilling with slight disturbing to the surrounding rock; the torque self-balancing of the drill bit and the power system is realized as a whole without the torque effect to the upper drilling tool by utilizing the stator group and the rotor group of the power motor to drive the external and internal drill bits respectively; it is only necessary to trip the winch apparatus for the drilling tool on the ground to realize the normal operations of drilling, tripping, and logging-while-drilling by integrating the power source, mud circulating system and logging system, etc. into the drilling tool; the winch hoists up the drilling tool to remove rock particles at the sticking point by alternative positive and reverse rotations of the drill bit for unfreezing in order to realize the unfreezing when got stuck.

Downhole drilling tool system of torque self-balancing

A method for heating oil shale underground in situ. Shale oil and fuel gas can be obtained from an underground oil shale seam in situ, and the fuel gas can also be obtained from an underground coal seam in situ. Wells are drilled downwardly reaching an operation region of an underground oil shale ore bed. Electricity for partial discharge of the ore bed is conducted into electrodes, and a plasma channel is formed in the ore bed and subjected to breakdown by the electricity; after the resistance of each of two electrode regions is lowered, the two electrodes are used for conducting currents into the plasma channel in the oil shale ore bed; the oil shale ore bed is heated under the resistance heating function of the plasma channel; and released heat is used for realizing thermal cracking and gasification of fixed organic carbon in the oil shale ore bed.

Method for heating oil shale subsurface in-situ

A forced cooling circulation system for drilling mud, which includes a refrigeration unit (), a secondary refrigerant tank (), a coaxial convection heat exchanger () for mud and a mud pond (), is disclosed. The refrigeration unit () is in connection with the secondary refrigerant tank () and the coaxial convection heat exchanger () for mud via a pump (), and the coaxial convection heat exchanger () for mud is in connection with the mud pond () via a pump () and pipelines. Heat exchange tubes of the coaxial convection heat exchanger () for mud are disposed as a double-layer structure or a multi-layer structure, and the inner heat exchange tubes () are mounted inside of the outer heat exchange tubes (). The secondary refrigerant or the mud is circulated in the annular space between the inner heat exchange tubes () and the outer heat exchange tubes (), and the mud or the secondary refrigerant is circulated in the inner tubes (). The flow of the circulated mud is opposite to that of the circulated secondary refrigerant, and insulation material () is painted on the external wall of the outer tubes ().

Forced cooling circulation system for drilling mud

The present invention relates to a sampler for gas hydrates by hole bottom freezing, the sampler comprises a fisher, a wire-line coring mechanism and an outer barrel, and it further comprises a refrigeration portion, a low temperature control portion and a frozen insulation sample portion, which constitute an inner barrel assembly located inside the outer barrel together, wherein a refrigerant in the refrigeration portion is injected into the frozen insulation sample portion under a control of the low temperature control portion, so that a cooling medium in the frozen insulation sample portion is always kept under a predetermined temperature, and a core sample of gas hydrates is frozen at the bottom of a drill hole. The invention also relates to a sampling method using the sampler as mentioned above. In the invention, the temperature of the sample can be decreased by using an external cooling source to suppress hydrate decomposition, the critical decomposition pressure of gas hydrates can be reduced by active decreasing the temperature of the sample, and the stability of gas hydrates is maintained by a passive pressure drop. The method of the present invention need not to keep the pressure of the sample, and is simple to obtain a core sample of gas hydrates with higher fidelity.

Sampling method and sampler for gas hydrates by hole bottom freezing

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Changchun, China

Youhong Sun