CN219262347U - While-drilling detection device for downhole gas - Google Patents

While-drilling detection device for downhole gas Download PDF

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CN219262347U
CN219262347U CN202223274461.7U CN202223274461U CN219262347U CN 219262347 U CN219262347 U CN 219262347U CN 202223274461 U CN202223274461 U CN 202223274461U CN 219262347 U CN219262347 U CN 219262347U
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gas
detection
downhole
bin
drilling
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马永乾
裴学良
唐洪林
康波
朱焕刚
燕修良
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China Petrochemical Corp
Sinopec Oilfield Service Corp
Sinopec Shengli Petroleum Engineering Corp
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
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China Petrochemical Corp
Sinopec Oilfield Service Corp
Sinopec Shengli Petroleum Engineering Corp
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
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Abstract

The utility model provides a detection while drilling device for downhole gas, which comprises a first nipple; the control mechanism is arranged in the first short section; the detection mechanism is arranged between the first short joint and the control mechanism and comprises a separation bin for receiving underground gas, a detection bin and an adjusting component; and the second nipple is internally provided with a gas injection mechanism which is communicated with the separation bin and used for injecting carrier gas, wherein the control mechanism is connected with the adjusting component so as to promote underground gas and carrier gas to flow into the separation bin and the detection bin in sequence through the adjusting component, and the underground condition is evaluated through a detection device in the detection bin. The utility model can detect the complex gas in the well in real time, thereby ensuring that ground personnel can grasp the information of the oil gas in the stratum in the well in real time, and further accurately judging the property and the productivity of the reservoir.

Description

用于井下气体的随钻检测装置Detection-while-drilling device for downhole gas

技术领域technical field

本实用新型涉及石油地质勘探钻井与安全生产领域,具体地涉及一种于井下气体的随钻检测装置。The utility model relates to the fields of petroleum geological exploration drilling and safe production, in particular to a gas detection device while drilling in a downhole.

背景技术Background technique

在钻井的过程中,气侵现象是一种风险极高的现象。尤其在具有复杂情况的井下内稍有不慎就会引发井涌甚至井喷等严重事故。例如在高压,高产和高含硫化氢的“三高”井或者地层特性了解较少的井。In the process of drilling, gas kick phenomenon is a very high risk phenomenon. Especially in the downhole with complex situation, a little carelessness will cause serious accidents such as well kick or even blowout. For example, in the "three high" wells with high pressure, high production and high hydrogen sulfide content or wells whose formation properties are poorly understood.

传统的气侵的检测主要是通过地面的泥浆池液位来判别或者是通过出口流量的变化来判别。但是,上述的两种方式均极易受到外界因素干扰,从而影响判别的准确性。此外,上述的两种方式均存在信息滞后的情况,从而极易对后期排气和井下安全造成较大的影响。The traditional air intrusion detection is mainly judged by the liquid level of the mud pool on the ground or by the change of the outlet flow. However, the above two methods are easily interfered by external factors, thus affecting the accuracy of discrimination. In addition, both of the above two methods have information lag, which can easily have a greater impact on later exhaust and downhole safety.

如果能够掌握井下地层含油气的信息,那么将有利于判断储层的性质和产能。目前,烃类录井技术大部分需要在地面上将钻井液中的烃进行脱离,再利用色谱、荧光、红外光谱等手段进行检测评价以获取井下信息,但是此技术存在着价格昂贵、油气评价未定量、分析速度缓慢等问题。If the oil and gas information of the downhole formation can be obtained, it will be beneficial to judge the nature and productivity of the reservoir. At present, most of the hydrocarbon logging technology needs to remove the hydrocarbons in the drilling fluid on the surface, and then use chromatography, fluorescence, infrared spectroscopy and other means to detect and evaluate to obtain downhole information. However, this technology is expensive and oil and gas evaluation Unquantified, slow analysis speed and other issues.

CN209413900U公开了一种井下随钻气液分离检测装置,它包括分离缸、激光拉曼探测装置,分离缸开口端面处固定设置有固液分离膜,在分离缸内依次设置气液分离膜、活塞、隔离壁,内外双丝杠位于隔离壁外侧的一端垂直连接活塞,内外双丝杠位于隔离壁内侧的部分设置第二滚珠返向器;内丝杠一端垂直安装气液分离膜,内丝杠与内外双丝杠啮合,内丝杠另一端设置第一滚珠返向器;两个滚珠返向器的两端均具有轴肩,中间段均具有轮齿,每个滚珠返向器均与相应的齿轮啮合,每个齿轮均安装在相应的电机动力输出端;激光拉曼探测装置包括激光拉曼检测仪和激光拉曼探头,激光拉曼检测仪与激光拉曼探头连接。CN209413900U discloses a kind of downhole gas-liquid separation detection device while drilling, it comprises separation cylinder, laser Raman detection device, separation cylinder opening end face place is fixedly provided with solid-liquid separation membrane, in separation cylinder, gas-liquid separation membrane, piston are arranged successively , Partition wall, one end of the inner and outer double screw located on the outer side of the partition is vertically connected to the piston, and the part of the inner and outer double screw located on the inner side of the partition is provided with a second ball return device; one end of the inner screw is vertically installed with a gas-liquid separation membrane, and the inner screw It meshes with the inner and outer double screw, and the other end of the inner screw is provided with a first ball return device; both ends of the two ball return devices have shaft shoulders, and the middle section has gear teeth, and each ball return device is connected to the corresponding The gears are meshed, and each gear is installed at the power output end of the corresponding motor; the laser Raman detection device includes a laser Raman detector and a laser Raman probe, and the laser Raman detector is connected to the laser Raman probe.

上述装置能够在熟知地层特性的井内获取井下信息。由于“三高”井或者地层特性了解较少的井内的钻柱内的空间较小且具有不确定性,而激光拉曼检测仪体积通常较大,因此难以在具有较小空间的钻柱内进行有效地安装。此外,由于激光拉曼检测为精密仪器,因此,在钻柱振动或者井下高温的情况下更是难以保证获取井下信息的准确性。The above-mentioned device can obtain downhole information in wells with known formation properties. Due to the small and uncertain space in the drill string of "three high" wells or wells with less known formation characteristics, and the laser Raman detector is usually large in volume, it is difficult to perform the test in the drill string with small space. for effective installation. In addition, since laser Raman detection is a precision instrument, it is even more difficult to ensure the accuracy of downhole information under the condition of drill string vibration or high temperature downhole.

因此,在本领域希望提供一种用于井下气体的随钻检测装置,从而解决上述问题。Therefore, it is desirable in the art to provide a detection-while-drilling device for downhole gas so as to solve the above-mentioned problems.

实用新型内容Utility model content

本实用新型的目的在于提出一种用于井下气体的随钻检测装置,其通过气敏传感器阵列能够对井下复杂气体的组分与浓度进行更精准的检测,从而使得地面人员能够实时地掌握井下地层含油气的信息,进而能够对储层的性质和产能进行准确地判断。The purpose of this utility model is to propose a detection device for downhole gas while drilling, which can detect the composition and concentration of downhole complex gas more accurately through the gas sensor array, so that the ground personnel can grasp the downhole gas in real time. The formation oil and gas information, and then can accurately judge the nature and production capacity of the reservoir.

根据本实用新型的第一方面,提供了一种用于井下气体的随钻检测装置,包括第一短节;According to the first aspect of the present utility model, a detection-while-drilling device for downhole gas is provided, including a first short joint;

设置在所述第一短节内的控制机构;a control mechanism disposed within said first short section;

设置在所述第一短节与所述控制机构之间的检测机构,其包括用于接收井下气体的分离仓、设置在所述分离仓的上游的检测仓,以及设于所述分离仓与所述检测仓之间的调节组件;以及The detection mechanism arranged between the first short joint and the control mechanism includes a separation chamber for receiving downhole gas, a detection chamber arranged upstream of the separation chamber, and a detection chamber arranged between the separation chamber and the control mechanism. an adjustment assembly between the detection chambers; and

设置在所述第一短节的下游的第二短节,在所述第二短节内设有与所述分离仓连通的用于注入载气的注气机构,a second short joint arranged downstream of the first short joint, a gas injection mechanism for injecting carrier gas communicated with the separation chamber is arranged in the second short joint,

其中,所述控制机构与所述调节组件连接,以通过所述调节组件来促使所述井下气体与所述载气依次流入到所述分离仓与所述检测仓内,从而通过所述检测仓内的检测器件来评价井下情况。Wherein, the control mechanism is connected with the adjustment assembly, so as to promote the downhole gas and the carrier gas to flow into the separation chamber and the detection chamber sequentially through the adjustment assembly, so as to pass through the detection chamber The internal detection device is used to evaluate the downhole situation.

在一个实施例中,所述随钻检测装置包括设置在所述第一短节内的外壁内的V型导流槽,以及设置在所述V型导流槽上的固体过滤器,其中,所述V型导流槽包括处于径向外侧的进口、处于径向内侧的第一出口,以及处于径向外侧且处于所述进口的轴向上游的第二出口,所述V型导流槽构造成能够通过所述进口与所述固体过滤器接收井下流体。In one embodiment, the detection-while-drilling device includes a V-shaped diversion groove arranged in the outer wall of the first nipple, and a solid filter arranged on the V-shaped diversion groove, wherein, The V-shaped guide groove includes an inlet on the radially outer side, a first outlet on the radially inner side, and a second outlet on the radially outer side and axially upstream of the inlet, and the V-shaped guide groove configured to receive downhole fluid through the inlet and the solids filter.

在一个实施例中,所述调节组件包括与所述分离仓连通的活塞件,以及设置在所述活塞件上游并与所述检测仓连通的第一单向阀,In one embodiment, the adjustment assembly includes a piston member communicating with the separation chamber, and a first one-way valve arranged upstream of the piston member and communicating with the detection chamber,

其中,所述控制机构构造成能够通过控制所述活塞件而促使所述V型导流槽内的井下气体与所述注气机构内的载气流入到所述分离仓内并进行混合,并通过控制所述第一单向阀而促使混合后的气体流入到所述检测仓内。Wherein, the control mechanism is configured to enable the downhole gas in the V-shaped diversion groove and the carrier gas in the gas injection mechanism to flow into the separation chamber and mix by controlling the piston, and The mixed gas is urged to flow into the detection chamber by controlling the first one-way valve.

在一个实施例中,所述分离仓包括至少一个通孔,以及设置在所述通孔内的气液分离膜,其中,所述气液分离膜在轴向上处于所述V型导流槽的第一出口的范围内,从而使流经所述V型导流槽的井下流体分离并允许分离后的气体进入到所述分离仓内,而分离后的液体通过所述V型导流槽的第二出口和所述固体过滤器回流井下。In one embodiment, the separation chamber includes at least one through hole, and a gas-liquid separation membrane arranged in the through hole, wherein the gas-liquid separation membrane is located in the V-shaped guide groove in the axial direction. within the range of the first outlet of the V-shaped diversion groove, so that the downhole fluid flowing through the V-shaped diversion groove is separated and the separated gas is allowed to enter the separation chamber, while the separated liquid passes through the V-shaped diversion groove The second outlet and the solid filter return downhole.

在一个实施例中,所述检测器件包括由若干个沿周向设置在所述检测仓内的金属半导体薄片组成的气敏传感器阵列。In one embodiment, the detection device includes a gas sensor array composed of several metal semiconductor thin slices arranged circumferentially in the detection chamber.

在一个实施例中,所述注气机构包括与所述分离仓连通的气缸,设置在所述气缸的出口端的流量控制器,以及用于与所述分离仓的下游端连接的密封连接器,其中,所述控制机构与所述流量控制器连通。In one embodiment, the gas injection mechanism includes a cylinder communicating with the separation chamber, a flow controller disposed at the outlet end of the cylinder, and a sealing connector for connecting with the downstream end of the separation chamber, Wherein, the control mechanism communicates with the flow controller.

在一个实施例中,所述注气机构还包括设置在所述气缸的出口端的第二单向阀,从而允许所述气缸内的气体流向所述分离仓。In one embodiment, the gas injection mechanism further includes a second one-way valve disposed at the outlet end of the cylinder, so as to allow the gas in the cylinder to flow to the separation chamber.

在一个实施例中,所述随钻检测装置还包括沿周向设置在所述第二短节与所述注气机构之间的环空内的若干个滚柱式扶正块,所述注气机构构造成能够在滚柱式扶正块的作用下保持固定姿态。In one embodiment, the detection-while-drilling device further includes several roller-type stabilizing blocks arranged circumferentially in the annular space between the second pup joint and the gas injection mechanism, and the gas injection mechanism The mechanism is configured to be able to maintain a fixed posture under the action of the roller type righting block.

在一个实施例中,所述控制机构包括分别与所述调节组件和所述注气机构连接的电路模块、与所述气敏传感器阵列连通并实时记录检测结果的存储模块,以及与上游的MWD连通的接口模块,其中,所述接口模块构造成能够将存储模块内的数据进行信号编译并实时传输至MWD。In one embodiment, the control mechanism includes a circuit module connected to the adjustment assembly and the gas injection mechanism, a storage module connected to the gas sensor array and recording the detection results in real time, and connected to the upstream MWD A connected interface module, wherein the interface module is configured to perform signal compilation on the data in the storage module and transmit it to the MWD in real time.

与现有技术相比,本实用新型的优点在于:本实用新型利用了气敏传感器阵列在井下具有良好的抗高温与抗高压的能力和面对复杂的混合气体时能够对其组分与浓度进行更精准的检测的能力,从而保证检测结果的准确性和权威性,进而能够使得地面人员实时地掌握井下地层含油气的信息,从而能够对储层的性质和产能进行准确地判断。此外,由于本实用新型中的气敏传感器阵列在井下具有较高的灵敏性且整体体积较小,从而能够跟随钻具一同下放的井内。因此,当处于“三高”井或者地层特性了解较少的井内时,本实用新型依然能够更容易地适应于钻柱内的空间较小且具有不确定性的情况。Compared with the prior art, the utility model has the advantages that: the utility model utilizes the gas sensor array to have good anti-high-temperature and high-pressure-resistant capabilities in the downhole, and can check the composition and concentration of complex mixed gases. The ability to perform more accurate detection ensures the accuracy and authority of the detection results, and enables ground personnel to grasp the information of oil and gas in the downhole formation in real time, so as to accurately judge the nature and productivity of the reservoir. In addition, since the gas sensor array in the utility model has high sensitivity downhole and the overall volume is small, it can be lowered into the well following the drilling tool. Therefore, when in a "three-high" well or a well with less known formation characteristics, the utility model can still be more easily adapted to situations where the space in the drill string is small and uncertain.

附图说明Description of drawings

下面将结合附图来对本实用新型进行详细地描述,在图中:The utility model will be described in detail below in conjunction with accompanying drawing, in the figure:

图1为根据本实用新型的用于井下气体的随钻检测装置的第一部分的结构示意图;Fig. 1 is a schematic structural view of the first part of the detection-while-drilling device for downhole gas according to the utility model;

图2为根据本实用新型的用于井下气体的随钻检测装置的第二部分的结构示意图;Fig. 2 is a structural schematic diagram of the second part of the detection-while-drilling device for downhole gas according to the utility model;

图3显示了根据本实用新型的用于井下气体的随钻检测装置的结构。Fig. 3 shows the structure of the detection-while-drilling device for downhole gas according to the utility model.

在附图中,相同的部件使用相同的附图标记。附图并未按照实际的比例绘制。In the figures, the same parts are given the same reference numerals. The figures are not drawn to scale.

具体实施方式Detailed ways

为了使本实用新型的技术方案及优点更加清楚明白,以下结合附图对本实用新型的示例性实施例进行进一步详细的说明。显然,所描述的实施例仅是本实用新型的一部分实施例,而不是所有实施例的穷举。并且在不冲突的情况下,本实用新型中的实施例及实施例中的特征可以互相结合。In order to make the technical solutions and advantages of the present utility model clearer, the exemplary embodiments of the present utility model will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only part of the embodiments of the present invention, rather than exhaustive of all the embodiments. And in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

为方便理解,方向性用语“纵向”或“轴向”或类似用语指的是用于井下气体的随钻检测装置的长度方向,即图1中的竖直方向。方向性用语“横向”或“径向”或类似用语指的是垂直于“纵向”或“轴向”的方向,即图1中的水平方向。For ease of understanding, the directional term "longitudinal" or "axial" or similar term refers to the length direction of the MWD device for downhole gas, ie the vertical direction in FIG. 1 . The directional terms "transverse" or "radial" or similar terms refer to a direction perpendicular to "longitudinal" or "axial", ie the horizontal direction in FIG. 1 .

方向性用语“上游”或“上方”或类似用语指的是靠近井口的方向,即图1中的顶端方向。方向性用语“下游”或“下方”或类似用语指的是远离井口的方向,即图1中的底端方向。The directional terms "upstream" or "above" or similar terms refer to the direction near the wellhead, ie the top direction in Figure 1 . The directional terms "downstream" or "below" or similar terms refer to the direction away from the wellhead, ie the bottom direction in FIG. 1 .

图1为根据本实用新型的用于井下气体的随钻检测装置100的第一部分的结构示意图。图2为根据本实用新型的用于井下气体的随钻检测装置100的第二部分的结构示意图。图3显示了根据本实用新型的用于井下气体的随钻检测装置的结构Fig. 1 is a schematic structural view of a first part of a detection-while-drilling device 100 for downhole gas according to the present invention. Fig. 2 is a schematic structural diagram of the second part of the detection-while-drilling device 100 for downhole gas according to the present invention. Fig. 3 shows the structure of the detection-while-drilling device for downhole gas according to the utility model

如图1到3所示,根据本实用新型的用于井下气体的随钻检测装置100主要包括第一短节1和第二短节2。其中,第一短节1的上游端与MWD(随钻测量仪器)连接,从而能够将检测到的信息通过MWD实时地传输至地面。第二短节2的下游端与井下动力钻具固定连接,从而使得随钻检测装置100能够跟随钻具一同进入井内,以进行检测工作。As shown in FIGS. 1 to 3 , a detection-while-drilling device 100 for downhole gas according to the present utility model mainly includes a first short joint 1 and a second short joint 2 . Wherein, the upstream end of the first short joint 1 is connected with MWD (Measurement While Drilling Instrument), so that the detected information can be transmitted to the ground in real time through MWD. The downstream end of the second sub-joint 2 is fixedly connected with the downhole dynamic drilling tool, so that the detection-while-drilling device 100 can enter the well together with the drilling tool for detection work.

根据本实用新型,如图1所示,随钻检测装置100还包括控制机构2和检测机构3。其中,控制机构2设置在第一短节1内,而检测机构3设置在控制机构2与第一短节1之间。优选地,控制机构2与检测机构3为分体式布局,从而使得控制机构2与检测机构3均具有相对独立的工作环境,进而提高随钻检测装置100的工作效率和检测信息的准确性。其内容在下文中介绍。According to the present utility model, as shown in FIG. 1 , the detection-while-drilling device 100 further includes a control mechanism 2 and a detection mechanism 3 . Wherein, the control mechanism 2 is arranged in the first short joint 1 , and the detection mechanism 3 is arranged between the control mechanism 2 and the first short joint 1 . Preferably, the control mechanism 2 and the detection mechanism 3 are in a split layout, so that both the control mechanism 2 and the detection mechanism 3 have relatively independent working environments, thereby improving the working efficiency of the detection-while-drilling device 100 and the accuracy of detection information. Its content is described below.

在一个实施例中,第一短节1作为控制机构2与检测机构3的支撑骨架,从而能够为二者在井下提供稳定且安全的工作环境。In one embodiment, the first short joint 1 is used as a supporting framework of the control mechanism 2 and the detection mechanism 3, so as to provide a stable and safe working environment for both of them downhole.

根据本实用新型,如图1所示,检测机构3包括分离仓32和检测仓31。其中,分离仓32通过V型导流槽11与井(未示出)内连通,从而能够接收井下气体。检测仓31设置在分离仓32的上游,并且检测仓31通过阀(未示出)与外部连通,从而能够排出检测后的气体。容易理解,在本实用新型中的井下指的是钻柱与井之间的环空;井下气体指的是钻柱与井之间的环空内的气体;井下流体指的是钻柱与井之间的环空内的流体。According to the present utility model, as shown in FIG. 1 , the detection mechanism 3 includes a separation chamber 32 and a detection chamber 31 . Wherein, the separation chamber 32 communicates with the inside of the well (not shown) through the V-shaped diversion groove 11, so as to be able to receive downhole gas. The detection chamber 31 is provided upstream of the separation chamber 32, and the detection chamber 31 communicates with the outside through a valve (not shown), so that the detected gas can be discharged. It is easy to understand that the downhole in the utility model refers to the annular space between the drill string and the well; the downhole gas refers to the gas in the annular space between the drill string and the well; the downhole fluid refers to the drill string and the well. fluid in the annulus between.

在一个实施例中,检测仓31与分离仓32均通过螺纹连接而固定在第一短节1内,因此,在钻探的过程中二者能够始终跟随着第一短节1转动,从而具备稳定地工作环境。In one embodiment, both the detection chamber 31 and the separation chamber 32 are fixed in the first short joint 1 through threaded connection, therefore, they can always follow the rotation of the first short joint 1 during the drilling process, thereby having a stable working environment.

根据本实用新型,如图1所示,检测机构3还包括调节组件33。调节组件33设置在分离仓32与检测仓31之间,从而能够选择性地将分离仓32与检测仓31连通。此外,控制机构2与调节组件33连通,并且能够控制调节组件33的开闭。其内容在下文中介绍。According to the present invention, as shown in FIG. 1 , the detection mechanism 3 further includes an adjustment component 33 . The adjustment assembly 33 is arranged between the separation chamber 32 and the detection chamber 31 , so that the separation chamber 32 can be selectively communicated with the detection chamber 31 . In addition, the control mechanism 2 communicates with the adjustment assembly 33 and can control the opening and closing of the adjustment assembly 33 . Its content is described below.

在一个实施例中,如图2所示,在第二短节2内设有注气机构41。注气机构41与分离仓32连通,并且能够向分离仓32内注入载气,从而有利于提高井内气体的检测结果的准确性。In one embodiment, as shown in FIG. 2 , an air injection mechanism 41 is provided in the second short joint 2 . The gas injection mechanism 41 communicates with the separation chamber 32, and can inject carrier gas into the separation chamber 32, thereby improving the accuracy of the gas detection results in the well.

在一个实施例中,第二短节2作为注气机构41的支撑骨架,从而能够为其提供稳定且安全的工作环境。In one embodiment, the second short joint 2 serves as a supporting frame of the gas injection mechanism 41, thereby providing a stable and safe working environment for it.

根据本实用新型的一个实施例,控制机构2构造成能够通过调节组件33来促使井下气体与注气机构41内的载气依次流入到分离仓32和检测仓31内,从而通过检测仓31内的检测器件来评价井下情况。其内容在下文中介绍。According to an embodiment of the present utility model, the control mechanism 2 is configured to be able to promote the downhole gas and the carrier gas in the gas injection mechanism 41 to flow into the separation chamber 32 and the detection chamber 31 sequentially through the adjustment assembly 33, thereby passing through the detection chamber 31 The detection device is used to evaluate the downhole situation. Its content is described below.

根据本实用新型,如图1所示,调节组件33包括活塞件331。其中,活塞件311与分离仓32的上游端连通。因此,当控制机构2控制活塞件311进行工作时能够促使分离仓32内产生负压的环境(也就是分离仓32内的压力逐渐降低),从而使在V型导流槽11(在下文中介绍)内的井下气体和注气机构41内的载气在压差的作用下进入到分离仓32内,并且二者能够进行充分地混合,进一步地提高了井下气体检测结果的准确性。According to the present invention, as shown in FIG. 1 , the adjustment assembly 33 includes a piston member 331 . Wherein, the piston member 311 communicates with the upstream end of the separation chamber 32 . Therefore, when the control mechanism 2 controls the piston member 311 to work, it can promote the environment of negative pressure in the separation chamber 32 (that is, the pressure in the separation chamber 32 gradually decreases), so that the V-shaped guide groove 11 (described below) ) and the carrier gas in the gas injection mechanism 41 enter the separation chamber 32 under the action of the pressure difference, and the two can be fully mixed, which further improves the accuracy of the downhole gas detection results.

在一个具体地实施例中,初始状态下分离仓32的压力与钻具内压力平衡,而只有在活塞件331工作时钻柱内外才会产生压差(也就是分离仓32内的压力逐渐降低),从而将V型导流槽11内的井下气体与注气机构41内的载气同时引导至分离仓32内,以确保后续的检测结果的准确性和权威性。In a specific embodiment, under the initial state, the pressure of the separation chamber 32 is balanced with the pressure in the drilling tool, and only when the piston member 331 is working, the pressure difference between the inside and outside of the drill string will be generated (that is, the pressure in the separation chamber 32 will gradually decrease. ), so as to guide the downhole gas in the V-shaped diversion groove 11 and the carrier gas in the gas injection mechanism 41 to the separation chamber 32 at the same time, so as to ensure the accuracy and authority of the subsequent detection results.

根据本实用新型,如图1所示,调节组件33还包括第一单向阀332。第一单向阀332设置在活塞件331的上游,并且与检测仓31的下游端连通。因此,当控制机构2控制第一单向阀332进行工作时能够促使在分离仓32内的混合气体(如上所述的井下气体与注气机构41内的载气)流入到检测仓31内。届时就能够通过检测仓31内的检测器件对井下气体进行快速地检测,并且将检测结果通过MWD实时地传输至地面。According to the present invention, as shown in FIG. 1 , the adjustment assembly 33 further includes a first one-way valve 332 . The first one-way valve 332 is disposed upstream of the piston member 331 and communicates with the downstream end of the detection chamber 31 . Therefore, when the control mechanism 2 controls the first one-way valve 332 to work, the mixed gas in the separation chamber 32 (the above-mentioned downhole gas and the carrier gas in the gas injection mechanism 41 ) can flow into the detection chamber 31 . At that time, the downhole gas can be quickly detected through the detection device in the detection chamber 31, and the detection result can be transmitted to the ground in real time through the MWD.

此外,第一单向阀332具有单向输送的作用,因此,分离仓32内的混合气体只能流入到检测仓31内。由此避免了反流的可能,从而提高随钻检测装置100的检测结果的准确性和权威性。In addition, the first one-way valve 332 has the function of one-way delivery, so the mixed gas in the separation chamber 32 can only flow into the detection chamber 31 . In this way, the possibility of backflow is avoided, thereby improving the accuracy and authority of the detection results of the detection-while-drilling device 100 .

在一个优选地实施例中,检测器件是气敏传感器阵列311。气敏传感器阵列311包括若干个沿周向设置在检测仓31内的金属半导体薄片,并且每个金属半导体薄片均呈长方形状。In a preferred embodiment, the detection device is a gas sensor array 311 . The gas sensor array 311 includes several metal-semiconductor flakes arranged in the detection chamber 31 along the circumference, and each metal-semiconductor flake is in the shape of a rectangle.

容易理解,由于气敏传感器具有良好的选择性,换句话说,每种传感器仅对一种或几种气体敏感。而井内气体中的地层气与天然气均是混合气体,因此,本实用新型以阵列的方式将若干个金属半导体薄片布置在检测仓31内,从而能够对井内气体的组分与浓度进行更精准的检测,从而保证检测结果的准确性和权威性,进而有效地避免因检测结果错误而造成的井下误判。It is easy to understand that because the gas sensor has good selectivity, in other words, each sensor is only sensitive to one or several gases. The formation gas and natural gas in the gas in the well are both mixed gases. Therefore, the utility model arranges several metal semiconductor sheets in the detection chamber 31 in an array, so that the composition and concentration of the gas in the well can be more accurately measured. Detection, so as to ensure the accuracy and authority of the detection results, and effectively avoid downhole misjudgment caused by incorrect detection results.

相比于现有技术中的激光拉曼检测等精密仪器来说,本实用新型中采用的气敏传感器阵列311具有良好的抗高温与抗高压的能力,同时在面对复杂的混合气体时能够对其组分与浓度进行更精准的检测,从而保证检测结果的准确性和权威性。因此,通过随钻检测装置100能够实时地掌握井下地层含油气的信息,从而能够对储层的性质和产能进行准确地判断。Compared with precision instruments such as laser Raman detection in the prior art, the gas sensor array 311 used in the utility model has good resistance to high temperature and high pressure, and can be used in the face of complex mixed gases More accurate detection of its components and concentrations, so as to ensure the accuracy and authority of the test results. Therefore, the oil-gas-bearing information of downhole formations can be grasped in real time through the detection-while-drilling device 100 , so that the properties and productivity of the reservoir can be accurately judged.

此外,本实用新型中的气敏传感器阵列311具有良好的灵敏性和较小体积(例如本申请可以直接与钻具连接而下放到井内),因而在第一短节1的保护下能够更容易地适应“三高”井或者地层特性了解较少的井,从而对该类井下的储层的性质和产能进行准确地判断。In addition, the gas sensor array 311 in the utility model has good sensitivity and small volume (for example, the application can be directly connected with the drilling tool and lowered into the well), so it can be more easily It can be adapted to "three-high" wells or wells with little known formation characteristics, so as to accurately judge the properties and productivity of such downhole reservoirs.

根据本实用新型,如图1所示,随钻检测装置100还包括V型导流槽11和固体过滤器(未示出)。V型导流槽11设置在第一短节1内的外壁内,用于引导钻柱与井的环空内的流体流向分离仓32。固体过滤器设置在V型导流槽11上,从而能够将环空内的固体进行过滤。容易理解,在井下工作时井内是含有岩屑、水、油气等多相流,所以必须先将固体岩屑等固相物质完全过滤掉,否则后续气体分离膜(在下文中介绍)极易被冲坏和失效。According to the present utility model, as shown in FIG. 1 , the detection-while-drilling device 100 further includes a V-shaped diversion groove 11 and a solid filter (not shown). The V-shaped diversion groove 11 is arranged in the outer wall of the first short joint 1 , and is used to guide the fluid in the annulus of the drill string and the well to flow to the separation chamber 32 . The solid filter is arranged on the V-shaped diversion groove 11, so that the solid in the annular space can be filtered. It is easy to understand that when working downhole, the well contains multi-phase flows such as cuttings, water, oil and gas, so the solid phase substances such as solid cuttings must be completely filtered out first, otherwise the subsequent gas separation membrane (introduced below) is easily washed away. bad and invalid.

根据本实用新型的一个实施例,如图1所示,V型导流槽11包括进口111、第一出口112和第二出口113。其中,进口111处于径向外侧,用于接收井下流体。第一出口112处于径向内侧,与气液分离膜322连通,用于向分离仓32输送分离后的气体。第二出口113处于径向外侧且处于进口111的轴向上游,在流动压差作用下排出分离后的液体。According to an embodiment of the present invention, as shown in FIG. 1 , the V-shaped diversion groove 11 includes an inlet 111 , a first outlet 112 and a second outlet 113 . Wherein, the inlet 111 is located on the outside in the radial direction, and is used for receiving downhole fluid. The first outlet 112 is radially inward, communicates with the gas-liquid separation membrane 322 , and is used for delivering the separated gas to the separation chamber 32 . The second outlet 113 is radially outside and axially upstream of the inlet 111 , and discharges the separated liquid under the action of the flow pressure difference.

根据本实用新型一个实施例中,由于钻柱与井之间的环空内的流体是向上游运动的,因此,环空内的流体在流动压差作用下通过进口111和固体过滤器进入到V型导流槽11内。分离仓32构造成能够在活塞件331的作用下形成负压环境,从而促使V型导流槽11内的流体通过第一出口112与气液分离膜322将分离后的气体送入到分离仓32内,而分离后的液体通过第二出口113和固体过滤器回流至环空。这样,一方面井内物质中的固相物质在固体过滤器的作用下被滤掉,从而只允许井下流体进入到V型导流槽11内。另一方面井下流体中的液体在气液分离膜322的作用下被过滤掉,从而只允许井下气体进入到分离仓32内。因此,随钻检测装置100能够确保进入到分离仓32内的均是气体,从而保证后续检测结果的准确性。According to one embodiment of the present invention, since the fluid in the annulus between the drill string and the well moves upstream, the fluid in the annulus enters into the In the V-shaped diversion groove 11. The separation chamber 32 is configured to form a negative pressure environment under the action of the piston member 331, thereby promoting the fluid in the V-shaped diversion groove 11 to send the separated gas into the separation chamber through the first outlet 112 and the gas-liquid separation membrane 322 32, and the separated liquid flows back to the annulus through the second outlet 113 and the solid filter. In this way, on the one hand, the solid phase substances in the substances in the well are filtered out under the action of the solid filter, so that only the downhole fluid is allowed to enter into the V-shaped diversion groove 11 . On the other hand, the liquid in the downhole fluid is filtered out under the action of the gas-liquid separation membrane 322 , so that only the downhole gas is allowed to enter the separation chamber 32 . Therefore, the detection-while-drilling device 100 can ensure that all gas enters the separation chamber 32, thereby ensuring the accuracy of subsequent detection results.

在另一个实施例中,随钻检测装置100还包括盖板12。固体过滤器安装在盖板12的内壁上,盖板12构造成能够部分地伸入到V型导流槽11的进口111与第二出口113内而形成固定连接,从而对固体过滤器与V型导流槽11起到有效地保护作用。In another embodiment, the detection-while-drilling device 100 further includes a cover plate 12 . The solid filter is installed on the inner wall of the cover plate 12, and the cover plate 12 is configured to partially extend into the inlet 111 and the second outlet 113 of the V-shaped flow guide groove 11 to form a fixed connection, so that the solid filter and the V Type diversion groove 11 plays an effective protective role.

在一个实施例中,如图1所示,分离仓32包括至少一个通孔,以及气液分离膜322。通孔与V型导流槽11的第一出口112对齐,从而允许V型导流槽11内的流体通过第一出口112进入。气液分离膜322设置在通孔内,从而能够将V型导流槽11内的流体分离。其内容在下文中介绍。In one embodiment, as shown in FIG. 1 , the separation chamber 32 includes at least one through hole and a gas-liquid separation membrane 322 . The through hole is aligned with the first outlet 112 of the V-shaped guide groove 11 , so that the fluid in the V-shaped guide groove 11 is allowed to enter through the first outlet 112 . The gas-liquid separation membrane 322 is disposed in the through hole, so as to separate the fluid in the V-shaped diversion groove 11 . Its content is described below.

根据本实用新型一个实施例中,分离仓32构造成能够在活塞件331的作用下形成负压环境,从而促使V型导流槽11内的井下流体进入到分离仓32内。这样,井下流体在气液分离膜322的作用下进行分离,并且分离后的气体进入到分离仓32内,而分离后液体通过V型导流槽11的第二出口113和固体过滤器回流至环空。According to an embodiment of the present invention, the separation chamber 32 is configured to form a negative pressure environment under the action of the piston member 331 , so as to promote the downhole fluid in the V-shaped diversion groove 11 to enter the separation chamber 32 . In this way, the downhole fluid is separated under the action of the gas-liquid separation membrane 322, and the separated gas enters the separation chamber 32, and the separated liquid flows back to the annulus.

在一个实施例中,气液分离膜322在轴向上处于V型导流槽11的第一出口112的范围内。由此使得V型导流槽11内的井下流体能够充分地通过气液分离膜322进入到分离仓32内,从而能够确保只有气体进入到分离仓32内,进而提高随钻检测装置100检测结果的准确性。In one embodiment, the gas-liquid separation membrane 322 is located within the range of the first outlet 112 of the V-shaped guide groove 11 in the axial direction. As a result, the downhole fluid in the V-shaped diversion groove 11 can fully enter the separation chamber 32 through the gas-liquid separation membrane 322, thereby ensuring that only gas enters the separation chamber 32, thereby improving the detection results of the detection-while-drilling device 100 accuracy.

在本实用新型的一个实施例中,气液分离膜322与固体过滤器均具有良好的抗高温、抗高压和抗冲击的能力。同时,气液分离膜322与固体过滤器还能够得到第一短节1的有效保护,因此,相比于现有技术来说,本实用新型具有良好的井下安全措施,从而能够获取较为准确的检测结果。In one embodiment of the present invention, both the gas-liquid separation membrane 322 and the solid filter have good resistance to high temperature, high pressure and impact. At the same time, the gas-liquid separation membrane 322 and the solid filter can also be effectively protected by the first short joint 1. Therefore, compared with the prior art, the utility model has good downhole safety measures, so that it can obtain more accurate Test results.

在一个实施例中,如图2所示,注气机构41包括安装在第二短节内2内的气缸411。优选地,气缸411为高压气缸,从而能够充入足量的压缩空气(一般能够保证500h的供气)。此外,在每次起钻后均能够查看并补足气缸411内的空气以进行下一次在井下的长时间气体检测。In one embodiment, as shown in FIG. 2 , the air injection mechanism 41 includes an air cylinder 411 installed in the second short joint 2 . Preferably, the cylinder 411 is a high-pressure cylinder, so that a sufficient amount of compressed air can be charged (generally, 500h of air supply can be guaranteed). In addition, the air in the cylinder 411 can be inspected and replenished after each trip out to perform the next long-term gas detection downhole.

在一个实施例中,如图2所示,注气机构41还包括流量控制器412。其中,流量控制器412设置在气缸411的出口端,并且能够控制气缸411流入到分离仓32的气体的流量。此外,流量控制器412与控制机构2连接。因此,在活塞件311工作时,控制机构2能够通过控制流量控制器412,从而调节气缸411流向分离仓32的气体的流量,进一步地提高气体流量的稳定性,以及载气与井下气体混合的充分性。In one embodiment, as shown in FIG. 2 , the gas injection mechanism 41 further includes a flow controller 412 . Wherein, the flow controller 412 is arranged at the outlet end of the cylinder 411 , and can control the flow rate of the gas flowing into the separation chamber 32 from the cylinder 411 . In addition, the flow controller 412 is connected to the control mechanism 2 . Therefore, when the piston member 311 is working, the control mechanism 2 can adjust the flow rate of the gas flowing from the cylinder 411 to the separation chamber 32 by controlling the flow controller 412, further improving the stability of the gas flow rate and the mixing of the carrier gas and the downhole gas. sufficiency.

在一个实施例中,如图2所示,注气机构41还包括设置在第二短节内2内的密封连接器413。密封连接器413的上游端能够与分离仓32的下游端进行密封式对接,从而保证气缸411能够充分且安全地流入到分离仓32内。In one embodiment, as shown in FIG. 2 , the gas injection mechanism 41 further includes a sealing connector 413 disposed in the second short joint 2 . The upstream end of the sealing connector 413 can be butted in a sealed manner with the downstream end of the separation chamber 32 , so as to ensure that the air cylinder 411 can fully and safely flow into the separation chamber 32 .

在本实用新型的一个实施例中,注气机构41还包括第二单向阀(未示出)。第二单向阀安装在气缸411的出口端,因此,使得注气机构41的气体流向只能是气缸411到分离仓32,从而有效地避免出现因逆向流通而影响检测结果的准确性的问题。In one embodiment of the present invention, the gas injection mechanism 41 further includes a second one-way valve (not shown). The second one-way valve is installed at the outlet end of the cylinder 411, so that the gas flow direction of the gas injection mechanism 41 can only be from the cylinder 411 to the separation chamber 32, thereby effectively avoiding the problem of affecting the accuracy of the detection results due to reverse flow .

根据本实用新型的一个实施例,如图2所示,随钻检测装置100还包括滚柱式扶正块42。滚柱式扶正块42设置有若干个,且均沿周向设置在第二短节4与注气机构41之间的环空内。因此,在井下钻探的过程中,注气机构41始终能够保持固定的姿态,并且不会跟随着第二短节2转动,从而有效地提高了气缸411的安全性和输出载气的稳定性。According to an embodiment of the present invention, as shown in FIG. 2 , the detection-while-drilling device 100 further includes a roller-type centralizing block 42 . There are several roller-type centralizing blocks 42, and they are all arranged in the annular space between the second short joint 4 and the gas injection mechanism 41 along the circumferential direction. Therefore, during downhole drilling, the gas injection mechanism 41 can always maintain a fixed posture, and will not follow the rotation of the second short joint 2, thereby effectively improving the safety of the cylinder 411 and the stability of the output carrier gas.

此外,由于注气机构41能够始终处于固定的姿态,因而能够为处于注气机构41的上游的控制机构2与检测机构3提供良好的支撑作用,以确保检测仓31与分离仓32均具有稳定的工作环境。In addition, because the gas injection mechanism 41 can always be in a fixed posture, it can provide good support for the control mechanism 2 and the detection mechanism 3 upstream of the gas injection mechanism 41, so as to ensure the stability of the detection chamber 31 and the separation chamber 32. working environment.

在一个实施例中,如图1所示,控制机构2包括电路模块21。电路模块21与调节组件33和注气机构41分别连通,从而能够对二者进行更精确地控制,以使得注气机构41能够根据调节组件33中的活塞件331的工作状态而向分离仓32输送载气。In one embodiment, as shown in FIG. 1 , the control mechanism 2 includes a circuit module 21 . The circuit module 21 communicates with the adjustment assembly 33 and the gas injection mechanism 41 respectively, so that the two can be controlled more precisely, so that the gas injection mechanism 41 can send air to the separation chamber 32 according to the working state of the piston member 331 in the adjustment assembly 33 . Delivery of carrier gas.

在一个实施例中,如图1所示,控制机构2还包括存储模块22。存储模块22与气敏传感器阵列311连通,并且能够实时记录气敏传感器阵列311所呈现的检测结果。In one embodiment, as shown in FIG. 1 , the control mechanism 2 further includes a storage module 22 . The storage module 22 communicates with the gas sensor array 311 and can record the detection results presented by the gas sensor array 311 in real time.

在一个实施例中,如图1所示,控制机构2还包括接口模块23。接口模块23的第一端与上游的MWD直接连接,接口模块23的第二端与存储模块22连接,从而能够通过MWD将存储模块22内的检测结果信息实时地传输至地面,以提高信息获取的准确性与实效性。In one embodiment, as shown in FIG. 1 , the control mechanism 2 further includes an interface module 23 . The first end of the interface module 23 is directly connected to the upstream MWD, and the second end of the interface module 23 is connected to the storage module 22, so that the detection result information in the storage module 22 can be transmitted to the ground in real time through the MWD to improve information acquisition. accuracy and effectiveness.

在一个实施例中,如图1所示,控制机构2还包括电能调节模块(未示出)。电能调节模块包括为存储模块22单独供电的第一电池组241、为随钻检测装置100整体供电的第二电池组242,以及调节件。其中,调节件能够对电能进行合理地分配,从而智能化地调节第一电池组241与第二电池组242之间的供电关系。In one embodiment, as shown in FIG. 1 , the control mechanism 2 further includes a power adjustment module (not shown). The electric energy adjustment module includes a first battery pack 241 that supplies power to the storage module 22 alone, a second battery pack 242 that supplies power to the detection-while-drilling device 100 as a whole, and an adjustment member. Wherein, the regulating member can reasonably distribute electric energy, so as to intelligently adjust the power supply relationship between the first battery pack 241 and the second battery pack 242 .

根据本实用新型的第二方面,提出了一种利用如上所述的用于井下气体的随钻检测装置100来检测井下气体的方法,包括如下步骤。According to the second aspect of the present utility model, a method for detecting downhole gas using the above-mentioned detection-while-drilling device 100 for downhole gas is proposed, including the following steps.

首先,将控制机构2和检测机构3通过螺纹安装在第一短节1内,并且调节分离仓32的位置以使通孔与第一出口111径向对齐。First, the control mechanism 2 and the detection mechanism 3 are installed in the first short joint 1 through threads, and the position of the separation chamber 32 is adjusted so that the through hole is radially aligned with the first outlet 111 .

然后,将注气机构41通过滚柱式扶正块42安装到第二短节2内,并通过密封连接器413与分离仓32的下游端密封式连接。Then, the gas injection mechanism 41 is installed into the second sub-joint 2 through the roller-type centering block 42 , and is sealingly connected with the downstream end of the separation chamber 32 through the sealing connector 413 .

之后,将装配好的随钻检测装置100的上游端与MWD连接,下游端与井下动力钻具连接并投入到井下。Afterwards, the upstream end of the assembled detection-while-drilling device 100 is connected to the MWD, and the downstream end is connected to the downhole power drilling tool and put into the downhole.

之后,通过调节组件33来促使井下气体与注气机构41内的载气依次流入到分离仓32与检测仓31内,Afterwards, the downhole gas and the carrier gas in the gas injection mechanism 41 are urged to flow into the separation chamber 32 and the detection chamber 31 sequentially by adjusting the assembly 33,

具体地说,环空内的流体在流动压差作用下通过进口111和固体过滤器进入到V型导流槽11内;控制机构2控制活塞件331工作,从而促使分离仓32内产生负压的环境(也就是分离仓32内的压力逐渐降低)。由此,V型导流槽11内的井下气体通过气液分离膜322而进入到分离仓32内,而注气机构41内的载气通过流量控制器412和第二单向阀进入到分离仓32。此时的井下气体与载气在分离仓32内进行充分地混合;Specifically, the fluid in the annular space enters into the V-shaped diversion groove 11 through the inlet 111 and the solid filter under the action of the flow pressure difference; the control mechanism 2 controls the operation of the piston 331, thereby promoting the generation of negative pressure in the separation chamber 32 environment (that is, the pressure in the separation chamber 32 gradually decreases). Thus, the downhole gas in the V-shaped diversion groove 11 enters the separation chamber 32 through the gas-liquid separation membrane 322, and the carrier gas in the gas injection mechanism 41 enters the separation compartment 32 through the flow controller 412 and the second one-way valve. Bin 32. At this time, the downhole gas and the carrier gas are fully mixed in the separation chamber 32;

具体地说,控制机构2控制第一单向阀332打开,从而使分离仓32内的混合气体进入到检测仓31内。此时的活塞件331复位。Specifically, the control mechanism 2 controls the first one-way valve 332 to open, so that the mixed gas in the separation chamber 32 enters the detection chamber 31 . At this time, the piston member 331 is reset.

之后,通过检测仓31内的气敏传感器阵列311对井下气体进行充分地检测,并且将检测的数据存入至存储模块22内。Afterwards, the downhole gas is fully detected through the gas sensor array 311 in the detection chamber 31 , and the detected data is stored in the storage module 22 .

最后,通过接口模块23将存储模块22内的检测数据进行信号编译并实时传输至MWD,然后再通过MWD传输至地面,从而能够实时地判断井下情况。Finally, the detection data in the storage module 22 is compiled and transmitted to the MWD in real time through the interface module 23, and then transmitted to the ground through the MWD, so that the downhole situation can be judged in real time.

容易理解,在每一次检测工作结束后,检测仓31均需将其内部的混合气体向外排出,从而再重复进行上述的操作,以进行新一轮的对井下气体的检测工作。It is easy to understand that after each detection work, the detection chamber 31 needs to discharge the mixed gas inside, so as to repeat the above operation to perform a new round of downhole gas detection.

本实用新型提供了一种用于井下气体的随钻检测装置,其利用了气敏传感器阵列在井下具有良好的抗高温与抗高压的能力和面对复杂的混合气体时能够对其组分与浓度进行更精准的检测的能力,从而保证检测结果的准确性和权威性,进而能够使得地面人员实时地掌握井下地层含油气的信息,从而能够对储层的性质和产能进行准确地判断。此外,由于本实用新型中的气敏传感器阵列在井下具有较高的灵敏性且整体体积较小,从而能够跟随钻具一同下放的井内。因此,当处于“三高”井或者地层特性了解较少的井内时,本实用新型依然能够更容易地适应于钻柱内的空间较小且具有不确定性的情况。The utility model provides a detection device for downhole gas while drilling, which utilizes the gas sensor array to have good resistance to high temperature and high pressure in the downhole and can detect the components and The ability to conduct more accurate detection of the concentration, so as to ensure the accuracy and authority of the detection results, and enable ground personnel to grasp the information of oil and gas in the downhole formation in real time, so as to accurately judge the nature and productivity of the reservoir. In addition, since the gas sensor array in the utility model has high sensitivity downhole and the overall volume is small, it can be lowered into the well following the drilling tool. Therefore, when in a "three-high" well or a well with less known formation characteristics, the utility model can still be more easily adapted to situations where the space in the drill string is small and uncertain.

以上仅为本实用新型的优选实施方式,但本实用新型的保护范围并不局限于此。本领域的技术人员在本实用新型的公开范围内,可容易地进行改变或变化,而这种改变或变化都应涵盖在本实用新型的保护范围之内。因此,本实用新型的保护范围应以权利要求书的保护范围为准。The above are only preferred embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art can easily make changes or changes within the disclosed scope of the utility model, and such changes or changes should be covered within the protection scope of the utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (9)

1. A while-drilling detection device for downhole gas, comprising:
a first nipple (1);
a control mechanism (2) arranged in the first short section (1);
a detection mechanism (3) arranged between the first nipple (1) and the control mechanism (2), comprising a separation bin (32) for receiving downhole gas, a detection bin (31) arranged upstream of the separation bin (32), and an adjustment assembly (33) arranged between the separation bin (32) and the detection bin (31); and
a second nipple (4) arranged at the downstream of the first nipple (1), a gas injection mechanism (41) communicated with the separation bin (32) and used for injecting carrier gas is arranged in the second nipple (4),
the control mechanism (2) is connected with the adjusting assembly (33) so as to enable the underground gas and the carrier gas to flow into the separation bin (32) and the detection bin (31) in sequence through the adjusting assembly (33), and therefore the underground condition is evaluated through detection devices in the detection bin (31).
2. A detection apparatus while drilling for downhole gas according to claim 1, comprising a V-shaped channel (11) arranged in an outer wall inside the first sub (1), and a solid filter arranged on the V-shaped channel (11), wherein the V-shaped channel (11) comprises an inlet (111) radially outside, a first outlet (112) radially inside, and a second outlet (113) radially outside and axially upstream of the inlet (111), and is configured to be able to receive downhole fluid through the inlet (111) and the solid filter.
3. The while-drilling detection device for downhole gases according to claim 2, wherein the adjustment assembly (33) comprises a piston member (331) in communication with the separation chamber (32), and a first one-way valve (332) arranged upstream of the piston member (331) and in communication with the detection chamber (31),
wherein the control mechanism (2) is configured to cause the downhole gas in the V-shaped diversion trench (11) and the carrier gas in the gas injection mechanism (41) to flow into the separation bin (32) and mix by controlling the piston member (331), and to cause the mixed gas to flow into the detection bin (31) by controlling the first one-way valve (332).
4. A downhole gas while drilling detection device according to claim 3, wherein the separation bin (32) comprises at least one through hole, and a gas-liquid separation membrane (322) arranged in the through hole, wherein the gas-liquid separation membrane (322) is axially in the range of the first outlet (112) of the V-shaped channel (11), thereby separating the downhole fluid flowing through the V-shaped channel (11) and allowing the separated gas to enter the separation bin (32), while the separated liquid is returned downhole through the second outlet (113) of the V-shaped channel (11) and the solid filter.
5. A downhole gas while drilling detection apparatus according to claim 4, wherein the detection means comprises a gas sensor array (311) consisting of a number of metal semiconductor wafers circumferentially arranged within the detection chamber (31).
6. The while-drilling detection device for downhole gas according to claim 5, wherein the gas injection mechanism (41) comprises a cylinder (411) in communication with the separation chamber (32), a flow controller (412) arranged at an outlet end of the cylinder (411), and a sealing connector (413) for connection with a downstream end of the separation chamber (32), wherein the control mechanism (2) is in communication with the flow controller (412).
7. The while drilling detection apparatus for downhole gases according to claim 6, wherein the gas injection mechanism (41) further comprises a second one-way valve arranged at the outlet end of the cylinder (411) allowing the gas within the cylinder (411) to flow towards the separation bin (32).
8. The while-drilling detection device for downhole gas according to claim 7, further comprising a number of roller-type centralizers (42) circumferentially arranged in the annulus between the second sub (4) and the gas injection mechanism (41), the gas injection mechanism (41) being configured to be able to maintain a fixed attitude under the influence of the roller-type centralizers (42).
9. A downhole gas while drilling detection device according to claim 8, wherein the control mechanism (2) comprises a circuit module (21) connected to the conditioning assembly (33) and the gas injection mechanism (41), respectively, a memory module (22) in communication with the gas sensor array (311) and recording the detection results in real time, and an interface module (23) in communication with the upstream MWD, wherein the interface module (23) is configured to signal the data within the memory module (22) and transmit to the MWD (5) in real time.
CN202223274461.7U 2022-12-07 2022-12-07 While-drilling detection device for downhole gas Active CN219262347U (en)

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