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A cuttings sampler for testing of cuttings from a drilling operation includes a sample extractor which extracts a sample of drilling mud from a flow line. The sample extractor includes a probe located inside of the flow line and having a plurality of openings to allow for the passage of drilling mud containing cuttings, and a variable flow mud pump for extracting a drilling mud sample from the mud flow line. The cuttings sampler further includes: a cleaning system that performs a cleaning action to remove fluid in the drilling mud sample resulting in a cutting sample; an analysis system for performing an initial analysis on the cutting sample to classify a type of rock contained in the cutting sample; a packaging system for accepting and placing the cutting sample in a storage container; and a main controller, configured to control at least the variable flow mud pump.

Method for performing geo-mechanical tests comprising a step of drilling a well in a ground of interest (1) by making a hole (2) bounded by a side wall (2a) defined by the ground of interest (1) and a step of performing a geomechanical hydraulic fracturing test using a sensor device, assembled in the drilling string, provided with a working duct (3) extending to an open outlet end and a pressure sensor. The outlet end is placed in abutment against the side wall (2a), the working fluid is pumped within the working duct (3), and a parameter identifying the pressure of the working fluid within the working duct (3) is measured.

An axisymmetric clutch mechanism includes a drive clutch body having a drive bearing surface and a drive clutch surface; an intermediate clutch body having an intermediate clutch surface configured for sliding contacting engagement with the drive clutch surface; a driven clutch body having a driven bearing surface configured for transferring compressive axial force to the drive bearing surface; and rotational drag means for generating resistance to rotational slippage between the drive clutch surface and the intermediate clutch surface. The intermediate and driven clutch bodies are helically coupled in a first rotational direction, forming a first helical coupling having a first lead angle, and with the taper angle of the drive clutch surface and the intermediate clutch surfaces and the first lead angle being selected such that the clutch mechanism will lock when the drive clutch body is rotated relative to the driven clutch body in the first rotational direction.

本发明公开了一种基于煤炭地下原位燃烧采热及碳封存方法和系统，方法包括在煤炭分布区确定煤层并合理划分多个燃烧单元；在每个燃烧单元实施供氧水平井和采热直井钻完井；准备制氧、连续油管和温控供氧管；注氧并利用连续油管和温控供氧管控制煤层燃烧；采出煤层燃烧产生的二氧化碳混合气以转换为电能进行利用；在燃空区、枯竭气田或深部圈闭进行二氧化碳封存。本发明将煤炭地下原位充分燃烧、二氧化碳采热与封存技术结合，对不易开采的煤炭进行原位充分燃烧，利用燃烧产生的二氧化碳混合气采出热能，利用燃控区、深部圈闭或枯竭气田封存二氧化碳，在充分利用煤炭热能的同时，减少碳排放对环境造成的影响，降低了煤炭利用中的环境污染。

The present invention relates to a movable formwork system for lining part of a tunnel. The system comprises: a guide rail, fastening means for fastening the guide rail to a surface of the tunnel to be lined, a formwork panel coupled to the guide rail, rolling means sliding on a surface of the guide rail and attached to the formwork panel, an anchoring structure having one part attached to the formwork panel and another part projecting from the formwork panel and is configured to be fastened to a surface of the tunnel to be lined. The formwork panel along with the anchoring structure can move together guided by the guide rail when the anchoring structure is not fastened to a surface of the tunnel to be lined. The invention is applicable for building mined soft-ground tunnels, for example, where the so-called Belgian tunneling method is recommended.

本实用新型涉及煤柱回收牵引技术领域，公开了一种应用于大巷煤柱回收作业的滚动滑移牵引装置，包括车体，所述车体的顶部左右侧均固定连接有电机槽，左侧所述电机槽的内壁固定连接有电机一，所述电机一的输出端固定连接有转动轴一，所述转动轴一的外壁固定连接有锥齿轮一，所述锥齿轮一的外壁啮合连接有锥齿轮二，所述锥齿轮二的底部固定连接有转动轴二，所述转动轴二的外壁转动连接有固定壳。本实用新型中，通过电机一驱动锥齿轮组与螺纹杆传动，带动连接杆及车轮上下移动，使牵引车可根据不同地形与环境灵活调节车轮高度，有效避免因地形起伏、确保在复杂地下环境或多样地形中仍能保持稳定行驶，提升作业场景的适配范围。

本实用新型公开了一种使用钻井深井卡瓦省力工具，包括：卡瓦控制爪、固定杆、横轴、纵轴、移动滚轮、操作杆、套筒A、套筒B、连接杆和握把，卡瓦控制爪通过铰链与固定杆一侧以旋转方式连接，固定杆另一侧底面与横轴一侧上表面固定连接，横轴另一侧通过枢轴与纵轴中端旋转连接，移动滚轮安装于纵轴两侧，操作杆通过枢轴与纵轴中端旋转连接，套筒A套设于纵轴外侧，套筒B套设于操作杆外侧，连接杆一侧与套筒A通过铰链连接，连接杆另一侧与套筒B通过铰链连接，握把固定安装于操作杆顶端。本实用新型解决了人离井口较近操作存在安全风险的问题。

A fixed cutter drill bit for drilling a borehole in an earthen formation includes a bit body having a central axis and a bit face. The bit body is configured to rotate about the central axis in a cutting direction of rotation. The bit face includes a concave cone region extending radially from the central axis, a convex shoulder region extending radially from the cone region, a nose at the intersection of the cone region and the shoulder region, and a gage region extending radially from the shoulder region to a full gage diameter of the drill bit. In addition, the drill bit includes a cutting structure disposed on the bit face. The cutting structure includes a primary blade extending radially from proximal the bit axis through the cone region and the shoulder region to the gage region. The blade has a leading side relative to the cutting direction of rotation, a trailing side relative to the cutting direction of rotation, and a cutter-supporting surface extending from the leading side to the trailing side. Further, the drill bit includes a plurality of cutter elements mounted to the cutter-supporting surface of the primary blade in the cone region, the shoulder region, and the gage region. Still further, the drill bit includes a gage pad disposed in the gage region and extending axially from the primary blade. The gage pad has a central axis, an uphole end distal the primary blade, a downhole end integral with the primary blade, a leading lateral side relative to the cutting direction of rotation, a trailing lateral side relative to the cutting direction of rotation, and a formation facing surface configured to slidingly engage a sidewall of the borehole during drilling. The formation facing surface of the gage pad extends axially from the uphole end to the downhole end of the gage pad, and wherein the formation facing surface extends laterally from the leading side of the gage pad to the trailing side of the gage pad. The gage pad includes a surface area reducing feature positioned along a middle portion of the gage pad that is axially positioned between and axially spaced from the uphole end of the gage pad and the downhole end of the gage pad. The surface area reducing feature comprises a first recess extending from the formation facing surface toward the bit body.