CN102536220A - Ground test method and ground test device for remote intersection tools - Google Patents
Ground test method and ground test device for remote intersection tools Download PDFInfo
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- CN102536220A CN102536220A CN2011104467071A CN201110446707A CN102536220A CN 102536220 A CN102536220 A CN 102536220A CN 2011104467071 A CN2011104467071 A CN 2011104467071A CN 201110446707 A CN201110446707 A CN 201110446707A CN 102536220 A CN102536220 A CN 102536220A
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Abstract
A ground test method for remote intersection tools is applied to testing measurement precision of remote intersection tool models for coal seam gas by ground simulation test, and includes: making test preparation; laying two parallel tracks on a site; mounting a MWD (measurement while drilling) system at 2m away from the rear end of a test trolley; mounting the test trolley on the tracks; horizontally fastening permanent magnet subs on the test trolley; and suspending a remote intersection tool sensor outside the other end of each track at a position 0.5-2m away from the tracks. During testing, a motor on the test trolley drives the permanent magnet subs to rotate to form a rotating magnetic field, and meanwhile, the test trolley is fixed at a position or pushed to move to the other end of each track. The remote intersection tool sensor receives magnetic signals of the permanent magnet subs and transmits the magnetic signals to a computer for processing. The ground test method and the ground test device achieve on-line testing with the MWD system, and can be used for simulating field operation of remote intersection and verifying a distance and angle measurement algorithm.
Description
Technical field
The present invention relates to coal bed gas horizontal well technology field, particularly thread a needle at a distance instrument ground test method and device of coal bed gas is used to test the influence factor of instrument model machine certainty of measurement of threading a needle at a distance.
Background technology
At present, coal bed gas has obtained paying attention to widely, and has carried out the exploitation of scale property in the basin, Qinshui and the basin, Erdos of China as a kind of novel energy that can instead of natural gas.Because China coal seam has low pressure, hyposmosis, low saturated reservoir characteristics, adopting coal bed gas horizontal well, multi-branched horizontal well, U type well is best cost-effective development mode.The technology of threading a needle is the key technology in the drilling process wherein at a distance.Consult Fig. 1.The cave bottom of bottom realization horizontal well and straight well accurately drills through in the cave of straight well.In Fig. 1, the field operation situation of threading a needle at a distance is shown.The horizontal well group of coal bed gas is by two mouthfuls of well constructions, i.e. water horizontal well and a bite straight well; The instrument of threading a needle at a distance is made up of permanent magnetism pipe nipple, sensor and host computer; The operation of threading a needle at a distance promptly uses the cave place of tool guides drill bit at the bottom of Straight Well of threading a needle at a distance to creep into, and reaches the purpose that straight well is communicated with horizontal well at last.Accomplish in this operation, the instrument of threading a needle is used for accurately measuring the relative position in drill bit and shaft bottom, cave at a distance, and the guiding drill bit creeps into, up to the connection of accomplishing two wells.Do not thread a needle the at a distance ground test method and the testing arrangement of instrument.
Summary of the invention
The objective of the invention is: a kind of ground test method and testing arrangement of the instrument of threading a needle at a distance are provided, before the engineering prototype of the instrument of threading a needle is at a distance gone into the well application, use the instrument of threading a needle at a distance to accomplish the process that the down-hole is communicated with operation in ground simulation.With confirmatory measurement algorithm, the disturbing factor of forgoing, detection certainty of measurement, test and practical applications are got ready in order to go into the well.
Technical scheme of the present invention is:
Thread a needle the at a distance ground test method of instrument comprises:
Steps A, test are prepared: at first, select the smooth place of a magnetic field intensity＜0.2nT, in the place, lay two parallel tracks, the length of track is 50～80 meters; Measurement-while-drilling system MWD is installed in test 2 meters, dolly rear end; To test dolly lays in orbit; Horizontal fixed permanent magnetism pipe nipple on the test dolly; Be hung with the tool sensor of threading a needle at a distance for 0.5～2 meter in the other end outside of track and apart from track; The tool sensor of threading a needle at a distance is suspended on the A-frame center; The tool sensor of threading a needle at a distance is apart from 100 millimeters on ground; Couple together by holding wire between the tool sensor of threading a needle at a distance and the computer; Couple together by holding wire between measurement-while-drilling system MWD and the computer.
Step B, test: start the motor on the test dolly, the rotation of motor drives test dolly permanent magnetism pipe nipple; Form a rotating excitation field.Regulate the rotating speed of permanent magnetism pipe nipple, the permanent magnetism pipe nipple is rotated with different rotating speeds, permanent magnetism pipe nipple rotary speed is in 60～300 rev/mins scope; Test simultaneously that dolly is still in a position or the push to test dolly moves to the guide rail other end, speed was between 10～50 meters/hour when the test dolly moved; The tool sensor of threading a needle at a distance receives the magnetic signal of permanent magnetism pipe nipple, and is transferred to computer, and computer carries out computing; Content measurement comprises: A, permanent magnetism pipe nipple rotating speed influence certainty of measurement; B, one-point measurement, kinetic measurement and permanent magnetism pipe nipple pace influence certainty of measurement; C, thread a needle tool sensor riding position, property placed in the middle and nonstatic state influences certainty of measurement at a distance; D, irony material influence certainty of measurement.
1, permanent magnetism pipe nipple rotating speed is to the measuring method (consulting Fig. 2) of certainty of measurement influence
The test cart stationary with 30 meters of air line distance of the tool sensor of threading a needle at a distance; Permanent magnetism pipe nipple rotary speed is regulated in 60～300 rev/mins the range of speeds, obtain permanent magnetism pipe nipple and thread a needle at a distance the tool sensor distance R between the two and the calculated value of bias angle theta value in order to following method.
Permanent magnetism pipe nipple and the distance R value between the tool sensor of threading a needle at a distance, through computes:
In the formula, μ
0Be the coal seam dielectric permeability, unit: H/m; R is permanent magnetism pipe nipple and the distance between the tool sensor of threading a needle at a distance, unit rice; P is a magnetic moment, and unit is Am
2H is a magnetic induction intensity, and unit is Gs.
Permanent magnetism pipe nipple and the bias angle theta value between the tool sensor of threading a needle at a distance, through computes:
In the formula, α is the angle of permanent magnetism pipe nipple direction of advance and magnetic direction, unit: degree; θ is the permanent magnetism pipe nipple and the drift angle between the line and center line of guide rail between the tool sensor of threading a needle at a distance, unit: degree.
Actual distance value and actual drift angle value all are to be obtained with actual measurement by the scene.
Calculate the permanent magnetism pipe nipple and thread a needle at a distance distance R value and the bias angle theta value between line and the center line of guide rail between the two between the tool sensor; Calculated value and actual measured value with distance R and bias angle theta compare, and obtain the influence of permanent magnetism pipe nipple rotating speed to certainty of measurement.
2, one-point measurement, kinetic measurement and permanent magnetism pipe nipple pace are to the measuring method of certainty of measurement influence
The test cart stationary with 30 meters of air line distance of the tool sensor of threading a needle at a distance; Make permanent magnetism pipe nipple rotary speed remain on 100 rev/mins; Use with the same method of steps A and obtain permanent magnetism pipe nipple and thread a needle at a distance the tool sensor distance R between the two and the calculated value and the actual measured value of bias angle theta value, obtain the influence of one-point measurement certainty of measurement.
Then, along track push to test dolly with 10～50 meters/hour speed through 30 meters, COMPUTER CALCULATION distance R and bias angle theta value between the two.With actual measured value relatively, and then obtain the influence of kinetic measurement and permanent magnetism pipe nipple pace to certainty of measurement.The calculated value of permanent magnetism pipe nipple and tool sensor distance R and the bias angle theta value between the two of threading a needle at a distance and actual measured value are used with the same method of step 1 and are obtained.
3, tool sensor riding position, property placed in the middle and nonstatic state the measuring method of threading a needle at a distance to the certainty of measurement influence
Keeping permanent magnetism pipe nipple rotary speed is 100 rev/mins; The test cart stationary with 30 meters of air line distance of the tool sensor of threading a needle at a distance; The tool sensor of will threading a needle at a distance is placed on the A-frame; The adjustment tool sensor of threading a needle at a distance, make thread a needle at a distance tool sensor respectively by sagging naturally be transformed to tilt, left and right deviation or the different riding positions that depart from up and down, the scope that tilts 1～15 spend between; The distance of left and right deviation is between 10～80 centimetres; The distance that departs from up and down is between 10～100 centimetres.Calculate the permanent magnetism pipe nipple respectively and thread a needle at a distance distance R and both bias angle theta value between the tool sensor, and with actual measured value relatively, thereby measure the influence of the tool sensor riding position of threading a needle at a distance, property placed in the middle to certainty of measurement.The calculated value of distance R between the two and bias angle theta value and actual measured value are used with the same method of step 1 and are obtained.
On the A-frame at tail track place; The tool sensor of threading a needle at a distance of slightly vacillating now to the left, now to the right; Calculate the permanent magnetism pipe nipple respectively and thread a needle at a distance distance R and both bias angle theta value between the tool sensor; Compare with actual measured value, thereby measure the influence of tool sensor nonstatic state of threading a needle at a distance certainty of measurement.The calculated value of distance R between the two and bias angle theta value and actual measured value are used with the same method of step 1 and are obtained.
4, the irony material is to the measuring method of certainty of measurement influence
The test cart stationary with 30 meters of air line distance of the tool sensor of threading a needle at a distance, permanent magnetism pipe nipple rotary speed is 100 rev/mins.Respectively place a short sleeve in 5 meters up and down in the tool sensor of threading a needle at a distance, the length of short sleeve is at 50 centimetres.Measure the remanent magnetism magnetic field intensity (i.e. the upper end intensity of magnetization, the lower end intensity of magnetization and the casing shoe place intensity of magnetization) of sleeve pipe with magnetometer.Regulate continuously distance and sleeve pipe and the distance of threading a needle at a distance between the tool sensor between two sleeve pipes, observe the permanent magnetism pipe nipple and the variation tendency of thread a needle at a distance distance R and both bias angle theta value calculated values between the tool sensor and the position of two tool sensor of threading a needle at a distance when undergoing mutation.Thereby measure of the influence of irony material to certainty of measurement.The calculated value of distance R between the two and bias angle theta value and actual measured value are used with the same method of step 1 and are obtained.
In the test process, measurement-while-drilling system MWD is placed in the back of measuring dolly all the time, and the connection computer reads its data measured.Those skilled in the art can be used for the simulated field construction with the online testing that measurement-while-drilling system MWD and the instrument of threading a needle at a distance carry out; Follow the tracks of the trend that the instrument of threading a needle is at a distance measured; Check the distance and bearing certainty of measurement of system of threading a needle at a distance, and can obtain the experience of site operation.
Thread a needle at a distance mainly the acting as of ground test work of instrument: the field operation of threading a needle is at a distance copied in (1), formulates operational procedure, is familiar with execute-in-place; (2) build the physical analogy environment of rotating excitation field measurement model, the Measurement Algorithm of verifying software middle distance and angle is revised measurement parameter; (3) field strength values that the permanent magnetism pipe nipple produces in each distance in the survey tool, preferred permanent magnet material; (4) thread a needle the at a distance measuring distance of tool sensor of checking, the certainty of measurement of the tool sensor of preferably threading a needle at a distance; (5) each assembly of engineering prototype (comprising permanent magnetism pipe nipple, sensor and computer) to preliminary completion carries out combined debugging; (6) carry out online testing with measurement-while-drilling system MWD, simulated field is constructed, and checks the distance and bearing certainty of measurement of the system of threading a needle at a distance; (7) find out the disturbing factor that influences certainty of measurement, measure their amplitude that influences, formulate control measure.
Thread a needle the at a distance ground test device of instrument comprises permanent magnetism pipe nipple, thread a needle tool sensor, measurement-while-drilling system MWD, computer, test dolly, track and A-frame at a distance.
Article two, on the parallel track test dolly is arranged, place A-frame near track in the other end outside of track and the center line of vertical guide rail; A-frame is processed by three aluminium bars, in the A-frame center suspension tool sensor of threading a needle at a distance; Couple together by holding wire between the tool sensor of threading a needle at a distance and the computer;
The test dolly mainly is made up of joint, back mainboard, driven shaft, back base plate, wheel, connecting rod, noseplate, driving shaft and small pulley behind big belt pulley, preceding mainboard, bearing, Pulley shaft, pipe nipple front connector, the pipe nipple.Be fixed with connecting rod between the base plate after rectangle noseplate and the rectangle, be fixed with wheel respectively in the both sides of noseplate and back base plate; On the noseplate and vertical noseplate on face bonding be connected to preceding mainboard, be fixed with Pulley shaft on the top of preceding mainboard through bearing and bearing cover, be fixed with big belt pulley at the outboard end of Pulley shaft; The medial extremity of Pulley shaft is connected with gearbox and motor; Bottom at preceding mainboard is fixed with driving shaft through bearing and bearing cover, and driving shaft is parallel with Pulley shaft; Outboard end at driving shaft is fixed with small pulley, has belt to be connected between big belt pulley and the small pulley; Medial extremity at driving shaft is fixed with the pipe nipple front connector, and there is the drilling tool external screw thread end of pipe nipple front connector; Face bonding is connected to the back mainboard on the base plate of on the base plate of back and vertical back, and back mainboard is parallel with preceding mainboard; The bottom of mainboard is fixed with driven shaft through bearing and bearing cover in the back, and the center line of driven shaft and driving shaft center line are on same straight line; The medial extremity of driven shaft is fixed with joint behind the pipe nipple, and there is the drilling tool external screw thread end of joint behind the pipe nipple; Fixing permanent magnetism pipe nipple on joint behind pipe nipple front connector and the pipe nipple; The main effect of test dolly is to carry the permanent magnetism pipe nipple, and the velocity of rotation that can regulate the permanent magnetism pipe nipple.
The permanent magnetism pipe nipple is made up of body and strong magnetic cylinder, and body has centre bore for the cylinder bodily form, and there is the drilling tool internal thread at the two ends of body; Body is processed by no magnetic materials processing, and no magnetic material comprises stainless steel, copper or nonmetals.And on body, be evenly distributed with the through hole of vertical center line, and in through hole, inlay strong magnetic cylinder, the rotation of permanent magnetism pipe nipple forms a rotating excitation field, and the pipe nipple rotary speed is in 60～300 rev/mins scope.
The tool sensor of threading a needle at a distance mainly be used for surveying the rotating excitation field signal that the permanent magnetism pipe nipple sends (Hx, Hy, Hz), computer acquisition and with the signals collecting that records, amplification.Measuring the tool sensor of threading a needle at a distance is the fluxgate sensor of existing tool sensor (MWD) that thread a needle at a distance, is not innovation of the present invention.In measuring process, the tool sensor of threading a needle at a distance is positioned over above the A-frame all the time.
Beneficial effect of the present invention: the present invention thread a needle the at a distance ground test method and the testing arrangement of instrument, can simulate the field operation process of threading a needle at a distance, can verify the Measurement Algorithm of distance and angle; And be that the preferred permanent magnet material and the tool sensor of threading a needle at a distance improve reference; Realized online testing, found out the disturbing factor that influences certainty of measurement, measured their amplitude that influences with MWD; Improve foundation for formulating control measure, contribute for field operation improves the rate of hitting that is communicated with.
Description of drawings
Fig. 1 be horizontal well and straight well the cave bottom accurately drill through sketch map.
Fig. 2 is thread a needle the at a distance ground test method sketch map of instrument of the present invention.The measured distance of R for threading a needle at a distance between tool sensor and the magnetic short section; θ is the axial deviation angle of tool sensor and magnetic short section of threading a needle at a distance; L is the distance between MWD and the magnetic short section.
Fig. 3 is that the dolly sketch map is used in test.
Among the figure, the 1-big belt pulley; Mainboard before the 2-; The 3-bearing cover; The 4-bearing; The 5-Pulley shaft; The front connector of 6-pipe nipple; 7-permanent magnetism pipe nipple; Joint behind the 8-pipe nipple; Mainboard behind the 9-; The 10-driven shaft; Base plate behind the 11-; The 12-wheel; The 13-connecting rod; The 14-noseplate; The 15-driving shaft; The 16-small pulley.
Fig. 4 measures to calculate principle schematic.Among Fig. 4, P is magnetic moment (Am
2), H is magnetic induction intensity (Gs), and R is permanent magnetism pipe nipple and the distance between the tool sensor of threading a needle at a distance, and θ is permanent magnetism pipe nipple and the drift angle value between the tool sensor of threading a needle at a distance, and α is the angle of permanent magnetism pipe nipple direction of advance and magnetic direction.
The specific embodiment
Embodiment 1: below in conjunction with accompanying drawing, describe in detail and once simulate thread a needle at a distance field operation process and ground test device.
Thread a needle the at a distance ground test device of instrument comprises permanent magnetism pipe nipple, thread a needle tool sensor, computer, test dolly, track and A-frame at a distance.
Consult Fig. 3.The test dolly mainly is made up of joint 8, back mainboard 9, driven shaft 10, back base plate 11, wheel 12, connecting rod 13, noseplate 14, driving shaft 15 and small pulley 16 behind big belt pulley 1, preceding mainboard 2, bearing 4, Pulley shaft 5, pipe nipple front connector 6, the pipe nipple.Be fixed with connecting rod 13 after rectangle noseplate 14 and the rectangle between the base plate 11, be fixed with a wheel 12 respectively in the both sides of noseplate 14 and back base plate 11; On noseplate 14 and vertical noseplate 14 on face bonding be connected to before mainboard 2, be fixed with Pulley shaft 5 on the top of preceding mainboard 2 through bearing 4 and bearing cover 3, be fixed with big belt pulley 1 at the outboard end of Pulley shaft 5; The medial extremity of Pulley shaft 5 is connected with gearbox and motor; Bottom at preceding mainboard 2 is fixed with driving shaft 15 through bearing 4 and bearing cover 3, and driving shaft 15 is parallel with Pulley shaft 5; Outboard end at driving shaft 15 is fixed with small pulley 16, has belt to be connected between big belt pulley 1 and the small pulley 16; Medial extremity at driving shaft 15 is fixed with pipe nipple front connector 6, and there is the drilling tool external screw thread end of pipe nipple front connector 6; Face bonding is connected to back mainboard 9 on the base plate 11 of on the base plate 11 of back and vertical back, and back mainboard 9 is parallel with preceding mainboard 2; The bottom of mainboard 9 is fixed with driven shaft 10 through bearing 4 and bearing cover 3 in the back, and the center line of driven shaft 10 and driving shaft 15 center lines are on same straight line; The medial extremity of driven shaft 10 is fixed with joint 8 behind the pipe nipple, and there is the drilling tool external screw thread end of joint 8 behind the pipe nipple; Fixing permanent magnetism pipe nipple 7 of screw thread on joint 8 behind pipe nipple front connector 6 and the pipe nipple.
Consult Fig. 3.Permanent magnetism pipe nipple 8 is made up of body and strong magnetic cylinder, and body has 50 centimetres of length for the cylinder bodily form, 12 centimetres of external diameters, 5 centimetres of centre bores.There is drilling tool API internal thread at the two ends of body; Body is processed by no magnetic material stainless steel.And on body, be evenly distributed with the through hole of six row every row nine vertical center lines, and in each through hole, inlay a strong magnetic cylinder, the rotation of permanent magnetism pipe nipple forms a rotating excitation field, and permanent magnetism pipe nipple rotary speed is in 60～300 rev/mins scope.
2 meters of the height of A-frame; A-frame is processed by three aluminium bars, in the A-frame center suspension tool sensor of threading a needle at a distance; Couple together by holding wire between the tool sensor of threading a needle at a distance and the computer.
Thread a needle the at a distance ground test method of instrument comprises:
Steps A, test are prepared: at first, select smooth, a spacious magnetic disturbance at the following hardened ground of 0.2nT as the test site, lay two parallel tracks on the scenely, the length of track is 70 meters; Measurement-while-drilling system MWD is installed in 2 meters, dolly rear end; To test dolly lays in orbit; Horizontal fixed permanent magnetism pipe nipple 8 on the test dolly; Be hung with the tool sensor of threading a needle at a distance for 0.5～2 meter in the other end outside of track and apart from track; The tool sensor of threading a needle at a distance is suspended on the A-frame center; The tool sensor of threading a needle at a distance is apart from 100 millimeters on ground; Couple together by holding wire between the tool sensor of threading a needle at a distance and the computer; Couple together by holding wire between measurement-while-drilling system MWD and the computer.The extension tool sensor of threading a needle at a distance is placed in and carries out a magnetic field intensity apart from 3 meters of permanent magnetism pipe nipple and check before the experiment, and proofreaies and correct the MWD instrument according to local measured value.According to the air line distance of hanging the tool sensor of threading a needle at a distance, point of per in orbit 5 meters marks is as position to be tested.MWD is placed in 2 meters afterwards of driving trolley.
Step B, test: start the motor on the test dolly, the rotation of motor drives test dolly permanent magnetism pipe nipple; Form a rotating excitation field, the changes of magnetic field frequency is between 2～5Hz.Regulate the rotating speed of permanent magnetism pipe nipple, the permanent magnetism pipe nipple is rotated, 150 rev/mins of permanent magnetism pipe nipple rotary speeies with different rotating speeds; Test simultaneously that dolly is still in a position or the push to test dolly moves to the guide rail other end, speed was 20 meters/hour when the test dolly moved; The tool sensor of threading a needle at a distance receives the magnetic signal of permanent magnetism pipe nipple, and is transferred to computer, and computer carries out computing;
Start the rotation of motor drives magnetic short section, and move axially along track; Sensor receives the rotating excitation field signal that magnetic short section sends; By analysis of calculation models and processing; Solve the distance R and the angular deviation θ in drill bit and cave respectively, thereby measure permanent magnetism pipe nipple rotating speed, pace, the influence of factors such as tool sensor riding position, property placed in the middle and nonstatic state, irony material of threading a needle at a distance certainty of measurement.
Changing test condition tests respectively.
1, permanent magnetism pipe nipple rotating speed is to the measuring method (consulting Fig. 2) of certainty of measurement influence
The test cart stationary with 30 meters of air line distance of the tool sensor of threading a needle at a distance; Permanent magnetism pipe nipple rotary speed is regulated in 60～300 rev/mins the range of speeds, obtain permanent magnetism pipe nipple and thread a needle at a distance the tool sensor distance R between the two and the calculated value of bias angle theta value in order to following method.
Permanent magnetism pipe nipple and the distance R value between the tool sensor of threading a needle at a distance, through computes:
In the formula, μ
0Be the coal seam dielectric permeability, unit: H/m; R is permanent magnetism pipe nipple and the distance between the tool sensor of threading a needle at a distance, unit rice; P is a magnetic moment, and unit is Am
2H is a magnetic induction intensity, and unit is Gs.
Permanent magnetism pipe nipple and the bias angle theta value between the tool sensor of threading a needle at a distance, through computes:
In the formula, α is the angle of permanent magnetism pipe nipple direction of advance and magnetic direction, unit: degree; θ is the permanent magnetism pipe nipple and the drift angle between the line and center line of guide rail between the tool sensor of threading a needle at a distance, unit: degree.
Actual distance value and actual drift angle value all are to be obtained with actual measurement by the scene.Calculate the permanent magnetism pipe nipple and thread a needle at a distance distance R value and the bias angle theta value between line and the center line of guide rail between the two between the tool sensor; Compare with distance R value and bias angle theta value and actual measured value, obtain of the influence of permanent magnetism pipe nipple rotating speed certainty of measurement.
When rotating speed is 100 rev/mins, calculate distance R=28 meter, bias angle theta=5.5 degree; When rotating speed is 200 rev/mins, calculate distance R=31 meter, bias angle theta=4 degree.And actual measurement distance R=30 meter, bias angle theta=5 degree.This shows that the system of threading a needle at a distance is under these two rotating speeds, the drift angle of measuring in the time of 100 rev/mins is accurate, and the distance of measuring in the time of 200 rev/mins is accurate.And then more careful adjusting rotating speed measures, and finds distance and all smaller tachometer value of measurement of angle value deviation.
2, one-point measurement, kinetic measurement and permanent magnetism pipe nipple pace are to the measuring method of certainty of measurement influence
The test cart stationary with 30 meters of air line distance of the tool sensor of threading a needle at a distance; Make permanent magnetism pipe nipple rotary speed remain on 100 rev/mins; Use with the same method of steps A and obtain permanent magnetism pipe nipple and thread a needle at a distance the tool sensor distance R between the two and the calculated value and the actual measured value of bias angle theta value, obtain the influence of one-point measurement certainty of measurement.
When rotating speed is 100 rev/mins, calculate distance R=28 meter, bias angle theta=5.5 degree.And actual measurement distance R=30 meter, bias angle theta=5 degree.This shows that the system of threading a needle at a distance is under 100 rev/mins rotating speed, the distance of measurement is less than normal, and the drift angle of measurement is bigger than normal.
Then, along track push to test dolly with 10～50 meters/hour speed through 30 meters, COMPUTER CALCULATION distance R and bias angle theta value between the two.With actual measured value relatively, and then obtain the influence of kinetic measurement and permanent magnetism pipe nipple pace to certainty of measurement.The calculated value of permanent magnetism pipe nipple and tool sensor distance R and the bias angle theta value between the two of threading a needle at a distance and actual measured value are used with the same method of step 1 and are obtained.
With 20 meters/hour speed during, calculate distance R=28 meter, bias angle theta=5.5 degree at the test dolly through 30 meters; When dolly advances with 40 meters/hour speed, calculate distance R=31 meter, bias angle theta=4 degree.And actual measurement distance R=30 meter, bias angle theta=5 degree.This shows that the system of threading a needle at a distance is under these two paces, the drift angle of measuring during 20 meters/hour speed is accurate, and the distance of measuring during 40 meters/hour speed is accurate.And then more careful adjusting pace measures, and finds distance and all smaller pace value of measurement of angle value deviation.
3, tool sensor riding position, property placed in the middle and nonstatic state the measuring method of threading a needle at a distance to the certainty of measurement influence
Keeping permanent magnetism pipe nipple rotary speed is 100 rev/mins; The test cart stationary with 30 meters of air line distance of the tool sensor of threading a needle at a distance; The tool sensor of will threading a needle at a distance is placed on the A-frame; The adjustment tool sensor of threading a needle at a distance, make thread a needle at a distance tool sensor respectively by sagging naturally be transformed to tilt, left and right deviation or the different riding positions that depart from up and down, the scope that tilts 1～15 spend between; The distance of left and right deviation is between 10～80 centimetres; The distance that departs from up and down is between 10～100 centimetres.Calculate the permanent magnetism pipe nipple respectively and thread a needle at a distance distance R and both bias angle theta value between the tool sensor, and with actual measured value relatively, thereby measure the influence of the tool sensor riding position of threading a needle at a distance, property placed in the middle to certainty of measurement.The calculated value of distance R between the two and bias angle theta value and actual measured value are used with the same method of step 1 and are obtained.
Make the tool sensor of threading a needle at a distance respectively by saggingly naturally being transformed to 10 degree that tilt, 50 centimetres of left and right deviation, departing from 50 centimetres up and down, compare with actual measured value, calculating the distance R value has 2～5 meters deviation, and the bias angle theta value has the deviation of 5～15 degree.This shows that the tool sensor of threading a needle is at a distance pacified the position, property placed in the middle has certain influence to the influence of measuring, and should eliminate as far as possible.
The tool sensor of threading a needle at a distance on the A-frame of slightly vacillating now to the left, now to the right; Calculate the permanent magnetism pipe nipple respectively and thread a needle at a distance distance R and both bias angle theta value between the tool sensor; Compare with actual measured value, thereby measure the influence of tool sensor nonstatic state of threading a needle at a distance certainty of measurement.The calculated value of distance R between the two and bias angle theta value and actual measured value are used with the same method of step 1 and are obtained.
Slightly vacillating now to the left, now to the right when threading a needle tool sensor at a distance, fluctuation has up and down appearred in distance R that calculates and bias angle theta value, and the distance R calculated value departs from 5～20 meters of actual measured value, and the bias angle theta calculated value departs from actual measured value 5～20 degree.This shows that the tool sensor of threading a needle at a distance is very big if be in the nonstatic state to the influence of measuring.
4, the irony material is to the measuring method of certainty of measurement influence
The test cart stationary with 30 meters of air line distance of the tool sensor of threading a needle at a distance, permanent magnetism pipe nipple rotary speed is 100 rev/mins.Respectively place a short sleeve in 5 meters up and down in the tool sensor of threading a needle at a distance, the length of short sleeve is at 50 centimetres.Measure the remanent magnetism magnetic field intensity (i.e. the upper end intensity of magnetization, the lower end intensity of magnetization and the casing shoe place intensity of magnetization) of sleeve pipe with magnetometer.Regulate continuously distance and sleeve pipe and the distance of threading a needle at a distance between the tool sensor between two sleeve pipes, observe the permanent magnetism pipe nipple and the variation tendency of thread a needle at a distance distance R and both bias angle theta value calculated values between the tool sensor and the position of two tool sensor of threading a needle at a distance when undergoing mutation.Thereby measure of the influence of irony material to certainty of measurement.The calculated value of distance R between the two and bias angle theta value and actual measured value are used with the same method of step 1 and are obtained.
In the tool sensor of threading a needle at a distance when up and down a short sleeve is respectively placed at 5 meters, calculate distance R=26 meter, bias angle theta=6.5 degree.And actual measurement distance R=30 meter, bias angle theta=5 degree.This shows that the irony material can make the distance of measurement less than normal, the drift angle of measurement is bigger than normal.
Claims (7)
1. ground test method of instrument of threading a needle at a distance is characterized in that: comprising:
Steps A, test are prepared: at first, select the smooth place of a magnetic field intensity＜0.2nT, in the place, lay two parallel tracks, the length of track is 50～80 meters; Measurement-while-drilling system MWD is installed in test 2 meters, dolly rear end; To test dolly lays in orbit; Horizontal fixed permanent magnetism pipe nipple on the test dolly; Be hung with the tool sensor of threading a needle at a distance for 0.5～2 meter in the other end outside of track and apart from track; The tool sensor of threading a needle at a distance is suspended on the A-frame center; The tool sensor of threading a needle at a distance is apart from 100 millimeters on ground; Couple together by holding wire between the tool sensor of threading a needle at a distance and the computer; Couple together by holding wire between measurement-while-drilling system MWD and the computer;
Step B, test: start the motor on the test dolly, the rotation of motor drives test dolly permanent magnetism pipe nipple; Form a rotating excitation field; Regulate the rotating speed of permanent magnetism pipe nipple, the permanent magnetism pipe nipple is rotated with different rotating speeds, permanent magnetism pipe nipple rotary speed is in 60～300 rev/mins scope; Test simultaneously that dolly is still in a position or the push to test dolly moves to the guide rail other end, speed was between 10～50 meters/hour when the test dolly moved; The tool sensor of threading a needle at a distance receives the magnetic signal of permanent magnetism pipe nipple, and is transferred to computer, and computer carries out computing; Content measurement comprises: A, permanent magnetism pipe nipple rotating speed influence certainty of measurement; B, one-point measurement, kinetic measurement and permanent magnetism pipe nipple pace influence certainty of measurement; C, thread a needle tool sensor riding position, property placed in the middle and nonstatic state influences certainty of measurement at a distance; D, irony material influence certainty of measurement.
2. the ground test method of the instrument of threading a needle at a distance according to claim 1 is characterized in that: described permanent magnetism pipe nipple rotating speed to the measuring method of certainty of measurement influence is:
The test cart stationary with 30 meters of air line distance of the tool sensor of threading a needle at a distance; Permanent magnetism pipe nipple rotary speed is regulated in 60～300 rev/mins the range of speeds, obtain permanent magnetism pipe nipple and thread a needle at a distance the tool sensor distance R between the two and the calculated value of bias angle theta value in order to following method;
Permanent magnetism pipe nipple and the distance R value between the tool sensor of threading a needle at a distance, through computes:
In the formula, μ
0Be the coal seam dielectric permeability, unit: H/m; R is permanent magnetism pipe nipple and the distance between the tool sensor of threading a needle at a distance, unit rice; P is a magnetic moment, and unit is Am
2H is a magnetic induction intensity, and unit is Gs;
Permanent magnetism pipe nipple and the bias angle theta value between the tool sensor of threading a needle at a distance, through computes:
In the formula, α is the angle of permanent magnetism pipe nipple direction of advance and magnetic direction, unit: degree; θ is the permanent magnetism pipe nipple and the drift angle between the line and center line of guide rail between the tool sensor of threading a needle at a distance, unit: degree;
Actual distance value and actual drift angle value all are to be obtained with actual measurement by the scene;
Calculate the permanent magnetism pipe nipple and thread a needle at a distance distance R value and the bias angle theta value between line and the center line of guide rail between the two between the tool sensor; Calculated value and actual measured value with distance R and bias angle theta compare, and obtain the influence of permanent magnetism pipe nipple rotating speed to certainty of measurement.
3. the ground test method of the instrument of threading a needle at a distance according to claim 1 is characterized in that: described one-point measurement, kinetic measurement and permanent magnetism pipe nipple pace to the measuring method of certainty of measurement influence are:
The test cart stationary with 30 meters of air line distance of the tool sensor of threading a needle at a distance; Make permanent magnetism pipe nipple rotary speed remain on 100 rev/mins; Use with the same method of steps A and obtain permanent magnetism pipe nipple and thread a needle at a distance the tool sensor distance R between the two and the calculated value and the actual measured value of bias angle theta value, obtain the influence of one-point measurement certainty of measurement;
Then, along track push to test dolly with 10～50 meters/hour speed through 30 meters, COMPUTER CALCULATION distance R and bias angle theta value between the two; With actual measured value relatively, and then obtain the influence of kinetic measurement and permanent magnetism pipe nipple pace to certainty of measurement.
4. the ground test method of the instrument of threading a needle at a distance according to claim 1 is characterized in that: the described tool sensor riding position of threading a needle at a distance, property placed in the middle and nonstatic state to the measuring method of certainty of measurement influence are:
Keeping permanent magnetism pipe nipple rotary speed is 100 rev/mins; The test cart stationary with 30 meters of air line distance of the tool sensor of threading a needle at a distance; The tool sensor of will threading a needle at a distance is placed on the A-frame; The adjustment tool sensor of threading a needle at a distance, make thread a needle at a distance tool sensor respectively by sagging naturally be transformed to tilt, left and right deviation or the different riding positions that depart from up and down, the scope that tilts 1～15 spend between; The distance of left and right deviation is between 10～80 centimetres; The distance that departs from up and down is between 10～100 centimetres; Calculate the permanent magnetism pipe nipple respectively and thread a needle at a distance distance R and both bias angle theta value between the tool sensor, and with actual measured value relatively, thereby measure the influence of the tool sensor riding position of threading a needle at a distance, property placed in the middle to certainty of measurement;
On the A-frame at tail track place; The tool sensor of threading a needle at a distance of slightly vacillating now to the left, now to the right; Calculate the permanent magnetism pipe nipple respectively and thread a needle at a distance distance R and both bias angle theta value between the tool sensor; Compare with actual measured value, thereby measure the influence of tool sensor nonstatic state of threading a needle at a distance certainty of measurement.
5. the ground test method of the instrument of threading a needle at a distance according to claim 1 is characterized in that: described irony material to the measuring method of certainty of measurement influence is:
The test cart stationary with 30 meters of air line distance of the tool sensor of threading a needle at a distance, permanent magnetism pipe nipple rotary speed is 100 rev/mins; Respectively place a short sleeve in 5 meters up and down in the tool sensor of threading a needle at a distance, the length of short sleeve is at 50 centimetres; Measure the remanent magnetism magnetic field intensity of sleeve pipe with magnetometer; Regulate continuously distance and sleeve pipe and the distance of threading a needle at a distance between the tool sensor between two sleeve pipes, observe the permanent magnetism pipe nipple and the variation tendency of thread a needle at a distance distance R and both bias angle theta value calculated values between the tool sensor and the position of two tool sensor of threading a needle at a distance when undergoing mutation; Thereby measure of the influence of irony material to certainty of measurement.
6. according to the ground test method of claim 1,2,3, the 4 or 5 described instruments of threading a needle at a distance; It is characterized in that: the test dolly of use, mainly form by joint (8), back mainboard (9), driven shaft (10), back base plate (11), wheel (12), connecting rod (13), noseplate (14), driving shaft (15) and small pulley (16) behind big belt pulley (1), preceding mainboard (2), bearing (4), Pulley shaft (5), pipe nipple front connector (6), the pipe nipple; Be fixed with connecting rod (13) after rectangle noseplate (14) and the rectangle between the base plate (11), be fixed with wheel (12) respectively in the both sides of noseplate (14) and back base plate (11); Go up and the last face bonding of vertical noseplate (14) is connected to preceding mainboard (2) at noseplate (14), be fixed with Pulley shaft (5) through bearing (4) and bearing cover (3), be fixed with big belt pulley (1) at the outboard end of Pulley shaft (5) on the top of preceding mainboard (2); The medial extremity of Pulley shaft (5) is connected with gearbox and motor; Bottom at preceding mainboard (2) is fixed with driving shaft (15) through bearing (4) and bearing cover (3), and driving shaft (15) is parallel with Pulley shaft (5); Outboard end at driving shaft (15) is fixed with small pulley (16), has belt to be connected between big belt pulley (1) and the small pulley (16); Medial extremity at driving shaft (15) is fixed with pipe nipple front connector (6), and there is the drilling tool external screw thread end of pipe nipple front connector (6); The last face bonding of base plate (11) is connected to back mainboard (9) after back base plate (11) is gone up and be vertical, and back mainboard (9) is parallel with preceding mainboard (2); Bottom at back mainboard (9) is fixed with driven shaft (10) through bearing (4) and bearing cover (3), and the center line of driven shaft (10) and driving shaft (15) center line are on same straight line; The medial extremity of driven shaft (10) is fixed with joint (8) behind the pipe nipple, and there is the drilling tool external screw thread end of joint behind the pipe nipple (8); Joint (8) is gone up fixedly permanent magnetism pipe nipple (7) behind pipe nipple front connector (6) and pipe nipple.
7. according to the ground test method of claim 1,2,3, the 4 or 5 described instruments of threading a needle at a distance; It is characterized in that: the permanent magnetism pipe nipple (8) of use; Be made up of body and strong magnetic cylinder, body has centre bore for the cylinder bodily form, and there is the drilling tool internal thread at the two ends of body; Body is processed by no magnetic materials processing, on body, is evenly distributed with the through hole of vertical center line, in through hole, inlays strong magnetic cylinder.
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| CN103277090A (en) * | 2013-05-16 | 2013-09-04 | 中国船舶重工集团公司第七一〇研究所 | Drill pipe locating method and device based on dipulse magnetic moment measurement |
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| CN104179490A (en) * | 2014-08-06 | 2014-12-03 | 中国石油集团渤海钻探工程有限公司 | In-well proofreading method for horizontal well communicating equipment |
| CN105507885A (en) * | 2015-12-02 | 2016-04-20 | 中国地质大学（武汉） | Permanent-magnet pipe nipple |
| CN113338901A (en) * | 2021-06-07 | 2021-09-03 | 中海油田服务股份有限公司 | Testing system for instrument nipple and downhole instrument of lead |
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| CN103277090B (en) * | 2013-05-16 | 2015-10-21 | 中国船舶重工集团公司第七一〇研究所 | Based on drill rod orientation method and the device of dipulse magnetic moment measurement |
| CN103835663A (en) * | 2014-03-05 | 2014-06-04 | 中国石油大学(华东) | Anti-collision drilling assembly for vertical sections in dense cluster well groups and anti-collision method thereof |
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