CN202954809U - Underground metrical information transmission system - Google Patents

Underground metrical information transmission system Download PDF

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Publication number
CN202954809U
CN202954809U CN 201220617457 CN201220617457U CN202954809U CN 202954809 U CN202954809 U CN 202954809U CN 201220617457 CN201220617457 CN 201220617457 CN 201220617457 U CN201220617457 U CN 201220617457U CN 202954809 U CN202954809 U CN 202954809U
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CN
China
Prior art keywords
drill
drill collar
electrode
information transmission
underground
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CN 201220617457
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Chinese (zh)
Inventor
李林
盛利民
弓志谦
王磊
石荣
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China National Petroleum Corp
CNPC Engineering Technology R&D Co Ltd
Original Assignee
China National Petroleum Corp
CNPC Drilling Research Institute Co Ltd
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Priority to CN 201220617457 priority Critical patent/CN202954809U/en
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Abstract

The utility model discloses an underground metrical information transmission system and belongs to the field of measurement-while-drilling or non-measurement-while-drilling drilling apparatus in oil, mining or geological exploration and the like. The underground metrical information transmission system comprises a drill column, an underground sensor, a ground detection device and an electrode type transmitting antenna. The drill column comprises a drill rod, a drill collar and a drill bit, wherein the drill rod is in electric connection with the ground detection device, the drill collar is connected with the drill rod and the drill bit is connected with the drill collar and the underground sensor is installed in the drill bit. The electrode type transmitting antenna comprises an insulating layer and a metal electrode, wherein the insulating layer is covered on the drill collar and the metal electrode is covered on the insulating layer. A first electrode wire and a second electrode wire are leaded out of the interior of the drill collar, wherein the first electrode wire is connected with the drill collar and the second electrode wire is connected with the metal electrode. Electromagnetic signals are sent through the drill collar and the metal electrode, and the electromagnetic signals radiate electromagnetic waves, the ground detection device can obtain data collected by the underground sensor through the detected electromagnetic waves, generality is improved, and the underground metrical information transmission system can be widely applied to the underground metrical information transmission in a drilling well which uses various mediums as drilling fluid.

Description

The underground survey information transmission system
Technical field
The utility model relates to measurement while drilling or the non-measurement while drilling borehole instruments fields such as oil, mine or geological prospecting, particularly a kind of underground survey information transmission system.
Background technology
At oil, the mine, in the drilling engineerings such as geological prospecting, for wellbore trace is crept into more accurately and more promptly and accurately grasp formation information according to the requirement of engineering design, just need to be orientation sensor and the installation of sensors that gathers geological information in the position near drill bit.These sensors are along with creeping in the down-hole of rig measured, and the real-time data transmission that simultaneously sensor is collected is to ground, so that engineers and technicians in time understand the variation of track and the formation information of pit shaft.
At present, the transmission of underground survey information generally has two kinds of methods: a kind of is " wire transmission ", and a kind of is " mud-pulse transmission "." wire transmission " is the cable lower end connection measuring apparatus with an armoured single core, again measuring apparatus and cable is put into the down-hole brill very by the passage of drill string, by measuring apparatus the data communication device that obtains is crossed cable transmission to ground.Yet if use in rotary drilling, cable can be disconnected by strand in the passage of drill string; If use in the well of hole angle greater than 45 degree, measuring apparatus is difficult to transfer to the shaft bottom by own wt.
" mud-pulse transmission " is to utilize the impulse generator that is installed in the drill collar, produces compression wave in the mud in the drill string passage, transfers data to ground take this compression wave as carrier.Yet, this method can only be used in the wellbore construction that conventional mud is medium, and work as under balance pressure drilling because drilling fluid (medium) is compressible gas or foam mud, can cause pressure pulse meeting gross distortion, and make the ground signal receiving equipment can not correctly extract signal, therefore this method can't be used.
The utility model content
In order to solve the problem of prior art, the utility model embodiment provides the underground survey information transmission system in a kind of drilling well that is widely used in take various media as drilling fluid.Described technical scheme is as follows:
On the one hand, provide a kind of underground survey information transmission system, it comprises drill string, downhole sensor and ground detection; Drill string comprises the drilling rod that is electrically connected with ground detection, the drill collar that is connected with drilling rod and the drill bit that is connected with drill collar, and downhole sensor is installed on drill bit; The underground survey information transmission system also comprises the electric pole type transmitting antenna that is installed on the drill collar; The electric pole type transmitting antenna comprises the metal electrode on the insulating layer on the drill collar that is laid in and the insulating layer that is laid in, and the inside of drill collar leads to the first electrode wires of connection drill collar and the second electrode wires of connection metal electrode.
Further, the electric pole type transmitting antenna to the distance of the end face of drilling rod greater than the distance of electric pole type transmitting antenna to drill bit.
Further, insulating layer is laid on the outer circumference surface of drill collar.
Further, it is cylindric that metal electrode is, and the outer circumference surface of the insulating layer that is laid in.
Further, drill collar comprises the epimere drill collar of jointed rod and connects the hypomere drill collar of drill bit that epimere drill collar and drilling rod are the first electrode of electric pole type transmitting antenna; Hypomere drill collar and drill bit are the second electrode of electric pole type transmitting antenna, and the first electrode and the second electrode are respectively by drilling rod and drill bit and stratum formation conductive loop.
Further, insulating layer is laid on the outer circumference surface of epimere drill collar and hypomere drill collar intersection.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is: the underground survey information transmission system is by drill collar and the metal electrode transmission of electromagnetic signals of electric pole type transmitting antenna, and these electromagnetic signals give off electromagnetic wave during by drill string and stratum, ground detection is by detecting electromagnetic wave, can obtain the data that downhole sensor gathers, in order to make engineers and technicians in time understand the variation of actual path and the formation information of drilling well, the cable of having avoided " wire transmission " the easily disconnected and cable of strand is interfered and can't be with the technical problem of measuring apparatus below to the shaft bottom; And, the utility model is to obtain down-hole information by ground detection sensing electromagnetic wave, the drilling fluid of compressible gas or foam also overcome " mud-pulse transmission " because can cause pressure pulse meeting gross distortion, and make the ground signal receiving equipment can not correctly extract the problem of signal, versatility has strengthened, and can be widely used in the underground survey communication in the drilling well take various media as drilling fluid.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the underground survey information transmission system that provides of the utility model embodiment, and this underground survey information transmission system comprises the electric pole type transmitting antenna;
Fig. 2 is the structure enlarged diagram of electric pole type transmitting antenna among Fig. 1.
The specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model embodiment is described in further detail.
Please refer to Fig. 1, the utility model embodiment provides a kind of underground survey information transmission system, and it is used for measurement while drilling or non-measurement while drilling drilling well.The underground survey information transmission system comprises drill string 1 as information transfer channel, be installed in electric pole type transmitting antenna 3 on the drill string 1, be fixed on drill string 1 first end the downhole sensor (not shown) and connect the ground detection 5 of the second end of drill string 1.Downhole sensor is along with creeping in the down-hole of rig measured, and simultaneously with these measurement data acquisition, and become voltage signal to be applied to electric pole type transmitting antenna 3 Data Modulation of downhole sensor collection, by drill string 1 real-time data transmission is arrived ground detection 5 again, in order to make engineers and technicians in time understand the variation of actual path and the formation information of drilling well.
Drill string 1 comprises drilling rod 10, be connected in the drill collar 11 of drilling rod 10 bottoms and be connected in the drill bit (not shown) of drill collar 11 bottoms.Preferably, in the present embodiment, drill collar 11 comprises the epimere drill collar 13 of jointed rod 10 and connects the hypomere drill collar 15 of drill bit.Downhole sensor is electrically connected in drill bit; Ground detection 5 is electrically connected in drilling rod 10.
Please in conjunction with reference Fig. 2, electric pole type transmitting antenna 3 comprises the metal electrode cylindraceous 33 of the outer circumference surface of the insulating layer 31 on the outer circumference surface of the drill collar 11 that is laid in and the insulating layer 31 that is laid in.The be laid in intersection of epimere drill collar 13 and hypomere drill collar 15 of insulating layer 31.The epimere drill collar 13 of drill collar 11 and the drilling rod of its connection 10 are the first electrode of this electric pole type transmitting antenna 3; The hypomere drill collar 15 of drill collar 11 and the drill bit of its connection are the second electrode of this electric pole type transmitting antenna 3.The inside of drill collar 11 also leads to the first electrode wires 35 of connection drill collar 11 and the second electrode wires 37 of connection metal electrode 33.Like this, drill collar 11 and metal electrode 33 have formed two emission electrodes of this electric pole type transmitting antenna 3, come transmission of electromagnetic signals and form the Electromagnetic Launching circuit in drill collar 11 inside with this, the first electrode wires 35 and the second electrode wires 37 all are electrically connected with the Electromagnetic Launching circuit.Preferably, in the present embodiment, electric pole type transmitting antenna 3 arrives the distance of drill bit greater than electric pole type transmitting antenna 3 towards the distance of the end face of ground detection 5 to the drilling rod 10 of drill string 1.
Please again in conjunction with reference to Fig. 1, when carrying out measurement while drilling or non-measurement while drilling drilling well, the Data Modulation of downhole sensor collection becomes voltage signal after-applied the first electrode and the second electrode to electric pole type transmitting antenna 3, the first electrode and the second electrode are respectively by drilling rod 10 and drill bit and stratum 4 formation conductive loop, be applied to the first electrode of electric pole type transmitting antenna 3 and the signal voltage of the second electrode and produce signal code in conductive loop, signal code is upwards propagated along drill string 1; And this moment, the signal code of upwards propagating along drill string 1 simultaneously is with drill collar 11 and metal electrode 33 transmission of electromagnetic signals by electric pole type transmitting antenna 3, these electromagnetic signals give off electromagnetic wave during by drill string 1 and stratum 4, ground detection 5 is by detecting electromagnetic wave, can obtain the data that downhole sensor gathers, in order to make engineers and technicians in time understand the variation of actual path and the formation information of drilling well.
From the above, the underground survey information transmission system of the present utility model is by drill collar 11 and metal electrode 33 transmission of electromagnetic signals of electric pole type transmitting antenna 3, and these electromagnetic signals give off electromagnetic wave during by drill string 1 and stratum 4, the electromagnetic wave that ground detection 5 gives off by detection, can obtain the data that downhole sensor gathers, in order to make engineers and technicians in time understand the variation of actual path and the formation information of drilling well, the cable of having avoided " wire transmission " the easily disconnected and cable of strand is interfered and can't be with the technical problem of measuring apparatus below to the shaft bottom; And, the utility model is to obtain down-hole information by ground detection 5 sensing electromagnetic waves, the drilling fluid of compressible gas or foam also overcome " mud-pulse transmission " because can cause pressure pulse meeting gross distortion, and make the ground signal receiving equipment can not correctly extract the problem of signal, versatility has strengthened, and can be widely used in the underground survey communication in the drilling well take various media as drilling fluid.
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims (6)

1. underground survey information transmission system, it comprises drill string (1), downhole sensor and ground detection (5);
Described drill string (1) comprises the drilling rod (10) that is electrically connected with described ground detection (5), the drill collar (11) that is connected with described drilling rod (10) and the drill bit that is connected with described drill collar (11), and described downhole sensor is installed on described drill bit;
It is characterized in that the described underground survey information transmission system also comprises the electric pole type transmitting antenna (3) that is installed on the described drill collar; Described electric pole type transmitting antenna (3) comprises the metal electrode (33) on the insulating layer (31) on the described drill collar (11) that is laid in and the described insulating layer (31) that is laid in, and the inside of described drill collar (11) leads to first electrode wires (35) of described connection drill collar (11) and connects second electrode wires (37) of described metal electrode (33).
2. the underground survey information transmission system according to claim 1 is characterized in that, described electric pole type transmitting antenna (3) arrives the distance of described drill bit greater than described electric pole type transmitting antenna (3) to the distance of the end face of described drilling rod (10).
3. the underground survey information transmission system according to claim 1 is characterized in that, described insulating layer (31) is laid on the outer circumference surface of described drill collar (11).
4. the underground survey information transmission system according to claim 1 is characterized in that, described metal electrode (33) is cylindric, and the outer circumference surface of the described insulating layer that is laid in.
5. the underground survey information transmission system according to claim 1, it is characterized in that, described drill collar (11) comprises the epimere drill collar (13) that connects described drilling rod (10) and the hypomere drill collar (15) that connects described drill bit, and described epimere drill collar (13) and described drilling rod (10) are the first electrode of described electric pole type transmitting antenna (3); Described hypomere drill collar (15) and described drill bit are the second electrode of described electric pole type transmitting antenna (3), and described the first electrode and described the second electrode are respectively by described drilling rod (10) and described drill bit and stratum formation conductive loop.
6. the underground survey information transmission system according to claim 5 is characterized in that, described insulating layer (31) is laid on the outer circumference surface of described epimere drill collar (13) and described hypomere drill collar (15) intersection.
CN 201220617457 2012-11-20 2012-11-20 Underground metrical information transmission system Active CN202954809U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103835705A (en) * 2012-11-20 2014-06-04 中国石油天然气集团公司 Underground measurement information transmission system
CN104234648A (en) * 2014-07-18 2014-12-24 东北石油大学 Underground real-time control system for density of drilling fluid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103835705A (en) * 2012-11-20 2014-06-04 中国石油天然气集团公司 Underground measurement information transmission system
CN104234648A (en) * 2014-07-18 2014-12-24 东北石油大学 Underground real-time control system for density of drilling fluid

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