CN201416442Y

CN201416442Y - Collection system of down-hole vibration signals by drilling

Info

Publication number: CN201416442Y
Application number: CN200920160817XU
Authority: CN
Inventors: 李国庆; 孙文才; 朱红岩
Original assignee: Daqing Oilfield Co Ltd
Current assignee: Daqing Oilfield Co Ltd
Priority date: 2009-06-16
Filing date: 2009-06-16
Publication date: 2010-03-03
Anticipated expiration: 2019-06-16

Abstract

A collection system of down-hole vibration signals by drilling is mainly used to solve a problem that it is difficult to know a distance to a casing tube when drilling in a wellbore denseness region in the existent technology. The utility model is characterized in that the collection system also includes a secondary sensor fixed the head of a down-hole casing tube; also includes an acoustic wave data acquisition circuit composed of two stages of sound amplifiers, where the two sound amplifiers are a LM386N-1 chip and a MAX 4062 chip respectively; also includes a computer presorted with an acoustic wave data-handling software; the signal of the secondary sensor is outputted to an acoustic wave signal input end of the acoustic wave data acquisition circuit, and the acoustic wave signal of the acoustic wave data acquisition circuit is outputted to an audio signal input port of the computer. The system determines the distance to an adjacency well casing tube by collecting down-hole drill vibration signals during drilling process, and has a characteristic of preventing the drill from drilling into an adjacency casing tube.

Description

Creep into the underground vibrating signal acquiring system

Technical field:

The utility model relates to a kind of signal acquiring system that is applied in the drilling engineering field, especially relates to a kind of signal acquiring system of in the drilling process underground vibrating signal being gathered that is applied in.

Background technology:

In order to guarantee the stable of Daqing oil field crude output; the oil field is beginning the encryption enabled well gradually; therefore when the drilling engineering operation, run into the well close quarters through regular meeting; because well hypotelorism; in drilling process the situation that bit drills is scurried contiguous casing will often take place, and therefore produce to the oil field and brought serious loss.Because this is a de novo technical problem, does not also have special equipment to address this problem at present, therefore, how guaranteeing accurately to understand apart from the situation of closing on sleeve pipe in drilling process has become the technical problem that a urgent need solves.

The utility model content:

When creeping into, the well close quarters is difficult to understand the problem that distance is closed on the sleeve pipe distance in the prior art in order to solve, the utility model provides a kind of underground vibrating signal acquiring system that creeps into, this kind creeps into the underground vibrating signal acquiring system by downhole drill bit vibration signal in the drilling process is measured, thereby determine the distance of contiguous casing, have and to avoid bit drills to scurry the characteristics of contiguous casing.

The technical solution of the utility model is: this kind creeps into the underground vibrating signal acquiring system, comprises the down-hole casing body, and a secondary sensor, and described secondary sensor is fixed on the casing head of described down-hole casing body; Also comprise a sonic data Acquisition Circuit that is made of the two-stage sound intensifier, described two-stage sound intensifier adopts LM386N-1 chip and MAX4062 chip respectively; Also comprise a computer that prestores the sonic data process software; The signal of described secondary sensor outputs to the acoustic signals input of described sonic data Acquisition Circuit, and the acoustic signals of described sonic data Acquisition Circuit exports the audio signal input end mouth of described computer to.

The utlity model has following beneficial effect: the utility model is to be subjected to the ocean submarine to judge that by the power that detects external acoustic signals the inspiration of sound source distance finishes.In the drilling well drilling process, during the drill bit fractured rock, form impact to formation rock, will run into contiguous casing in the shock wave transmittance process, cause the vibration of contiguous casing, form acoustic response.Sound wave will transmit the well head of casing until old along sleeve pipe.Therefore after using the utility model, the secondary sensor of installing at old casing pithead position will pass to computer to this sound wave step by step by native system and carry out the sonic data analysis, realize the measurement of situation that downhole drill bit in the drilling process is vibrated by sonic detection, and then obtain and close on the accurate distance of casing, avoid boring the generation of the accident of scurrying, guaranteed the safety in production in oil field.

Description of drawings:

Fig. 1 is a composition schematic diagram of the present utility model.

Fig. 2 is the electrical schematic diagram of sonic data Acquisition Circuit in the utility model.

1-drill bit among the figure, 2-down-hole casing body, the secondary sensor of 3-, 4-computer.

The specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

Technology of the present utility model inspires and comes from this ocean submarine is judged sound source by the power that detects external acoustic signals distance.But this prior art is only applicable at the seawater of homogeneous and airborne sound transmission, be not suitable for heterogeneous rock medium, therefore, as shown in Figure 1, this programme has designed special sonic data Acquisition Circuit and has determined special signal source probe in conjunction with the concrete property of rock, when in the drilling well drilling process during drill bit fractured rock, formation is to the impact of formation rock, run into contiguous casing in the shock wave transmittance process, cause the vibration of contiguous casing, form acoustic response, sound wave is delivered to the well head that closes on casing along sleeve pipe, signal source probe is installed in the well head of old casing, realizes measurement downhole drill bit vibration situation in the drilling process by sonic detection.

Specifically, this kind creeps into the underground vibrating signal acquiring system, comprises the down-hole casing body, and a secondary sensor, and described secondary sensor is fixed on the casing head of described down-hole casing body; Also comprise a sonic data Acquisition Circuit that is made of the two-stage sound intensifier, described two-stage sound intensifier adopts LM386N-1 chip and MAX4062 chip respectively; Also comprise a computer that prestores the sonic data process software; The signal of described secondary sensor outputs to the acoustic signals input of described sonic data Acquisition Circuit, and the acoustic signals of described sonic data Acquisition Circuit exports the audio signal input end mouth of described computer to.Preference is: described secondary sensor is the secondary sensors of 4191 type condenser types.Figure 2 shows that the electrical schematic diagram of sonic data Acquisition Circuit, wherein P4 is the earphone delivery outlet, and U1 is chip LM386N-1, sound intensifier, power output is big, and P7 is a variable resistance, adjusts the size of divider resistance, adjust U1 input signal size, reach the size of adjusting output sound, U2 is chip MAX4062, the prime sound intensifier, being used for small-signal amplifies, and power output is little.P6 is a variable resistance, adjusts the size of divider resistance, adjusts the U2 amplifier gain, reaches to adjust the output sound size.P5 is a variable resistance, should be on one side ground connection.P1 is an infrasonic sensor, sound collection, acoustic-electro conversion chip, similar microphone; P3 is a jumper cap; P2 is the power input mouth; C1, C2 import power filter, storage capacitor; L1 and C3, C4 constitute power supply LC filtering; Diode D1 prevents the power supply reversal connection; The power supply reversal connection can not power on, protection back components and parts.In this circuit, infrasonic sensor detects sound, through power amplification in the one-level, passes through the one-level power amplification then, from the earphone output sound signal.Wherein dual-stage amplifier gains and all can adjust, and promptly power output is adjustable, shows as the sound adjustable size.

The utility model has been finished experiment, when grand celebration apricot 6-30-758 well drilling construction, on contiguous well apricot 6-30-E28 Casing head of borehole, the signal source probe is installed, the vibration situation of drill bit when using native system can accurately detect 600 meters of apricot 6-30-758 well well depths with interior creeping into.Apricot 6-30-758 well and apricot 6-30-E28 well two wells are at a distance of 65 meters.

Claims

1, a kind of underground vibrating signal acquiring system that creeps into comprises the down-hole casing body, it is characterized in that: the described underground vibrating signal acquiring system that creeps into also comprises a secondary sensor, and described secondary sensor is fixed on the casing head of described down-hole casing body; Also comprise a sonic data Acquisition Circuit that is made of the two-stage sound intensifier, described two-stage sound intensifier adopts LM386N-1 chip and MAX4062 chip respectively; Also comprise a computer that prestores the sonic data process software; The signal of described secondary sensor outputs to the acoustic signals input of described sonic data Acquisition Circuit, and the acoustic signals of described sonic data Acquisition Circuit exports the audio signal input end mouth of described computer to.

2, the underground vibrating signal acquiring system that creeps into according to claim 1 is characterized in that: described secondary sensor is the secondary sensors of 4191 type condenser types.