CN2150332Y - Device for measuring depth of well - Google Patents

Abstract

The utility model provides a device for measuring the depth of a well for the operation of petroleum well measuring, perforating operation, etc. The device for measuring the depth of the well can collect the data of the depth, the speed and the tension of a descent cable. The device for measuring the depth of the well is composed of a lower centralizing wheel 1, an upper centralizing wheel 2, a guide rail pressing plate 3, a tension spring 4, a main frame 6, a sign unit 7, a parallel rack 8, a measuring wheel 9, a tension spring 10, an encoder 11, etc. The utility model has high measuring precision, simple structure, convenient operation, stable performance and precise and reliable data collection. The utility model is matched with a digital winch panel to form a well measuring depth measurement system with full functions, and the device for measuring the depth of the well is compatible with various digital well measurers through a digital interface.

Description

Device for measuring depth of well

The utility model provides a kind of depth-logger measuring appliance, is the corollary equipment of field data collection in a kind of oil exploitation industry.

The depth-logger data acquisition is one of key problem in technology of geophysical log, perforation, side-wall coring and cable formation testing.The order of accuarcy of depth-logger is the important assurance of log data acquisition and perforating job quality, compares a basis with analysis-by-synthesis with the formation data of other science especially.At present both at home and abroad logging technique all is to adopt the way of measuring the cable of going into the well to obtain the depth data of corresponding well logging section, it is to come the scale cable every 25 meters or 50 meters " notes " magnetic mark on cable that domestic employing magnetic scale cable is measured under the logger way of well depth, measures the logger decline degree of depth with this scale cable.Because the residual deformation of cable and fading away of magnetic mark, surpass the error of regulation through depth survey after a while after, need to do magnetic mark to cable again, because this variation is gradual change, therefore the cable of this scaleization is not a standard ruler, and this will inevitably influence the accuracy and the uniformity of depth-logger.Another shortcoming of this technology is to come activation record media (as printing paper, film or tape) without the cable scale that this magnetic mark is determined, but comes the activation record media by another degree of depth transmission system that well head pulley and selsyn are formed.And the magnetic recording signal is by the marking apparatus reception and by the recorder record.The result who requires this to measure system in the well logging is in full accord, and often the mark degree of depth as standard, but all can cause degree of depth driving error when outside diameter of cable wearing and tearing or crimp and the lower sheave external diameter that works the effect of measuring wear and tear, the depth-logger collection effect of this sounding gear of being made up of two variable systems of measuring is bad.For this reason, in above-mentioned measuring technique, adopted the three-wheel cable to measure technology, this technology is to utilize axis three wheels of coplanar are not exceptionally straight and increase frictional force between wheel and the cable cable, measures cable by the meter wheel of centre, uses selsyn activation record media again.This method is because the tension cable produces very big extruding and rubbing action to wheel, cable self the concurrent living radial deformation that constantly stretched.This had both influenced surveys also easy damaged cable of precision, causes disconnected core of cable and cover wire to fracture.

The purpose of this utility model provides a kind of improved depth-logger measuring appliance, to improve certainty of measurement, alleviates cable, meter wheel abrasion, and the big joint of the unexpected change of diameter that makes on the cable is passed through smoothly.

The utility model is achieved in that the two-wheel redundant measurement technology that straight cable is held up in its employing, utilizes the several to righting wheel of a pair of meter wheel and meter wheel front and back, finishes setting upright cable.

Because this cable is measured under unforced state and carried out, meter wheel has become real survey tool with cable, the precision height, and the meter wheel life-span is long, and cable is had no damage.Another advantage of this measuring technique is, cable transfer and on carry in the process, cable can both be reflected in the measuring of meter wheel near near elongation the cylinder and shortening distortion, and depth survey is subjected to cable tension load, mud balance and the influence of test the speed (or in hindering in water) can alleviate greatly maybe and can eliminate.

Below in conjunction with drawings and Examples the concrete structure of the present utility model and the course of work are described.

Fig. 1 is the overall structure schematic diagram of the depth-logger measuring appliance of the utility model.Fig. 2 is a signal device of setting upright structure in the utility model up and down.Fig. 3 is the schematic diagram that the utility model meter wheel is measured mechanism.Fig. 4 is the schematic diagram of entire depth measuring system.

From accompanying drawing as can be seen, the utility model mainly by following righting wheel 1, go up righting wheel 2, guide rail clip 3, extension spring 4, trap 5, body frame 6, marking apparatus 7, parallel shelf 8,meter wheel 9,extension spring 10, form with coaxial encoder 11, diagonal member 12,swing pipe 13, turning handle 14, cotter pilotage 15, support bar 16 and the cylinder 17 ofmeter wheel 9, and the plunger 20 that is installed together of last righting wheel 1 and nut 21 between spring 18 is arranged,extension spring 19 is arranged between parallel shelf 8.

As shown in Figure 2, cable plays centralizing function passing through in the righting wheel up and down, when cable size change or have make cable size become suddenly greatly joint (as 20 millimeters) by the time, make on the righting wheel and lift just compress two springs 18, joint passes through smoothly.

As shown in Figure 3, meter wheel is installed on the parallel shelf 8, and parallel shelf 8 can slide onswing pipe 13, and cable is by between two meter wheels, and two meter wheels have been eliminated the skidding between cable and the wheel face byspring 19 tensions.After righting wheel was managed cable directly, making had good measurement state between cable and the meter wheel.Like this, no matter how cable size changes, always constant of the ratio of the revolution of meter wheel and cable displacement.When the cable connector that suddenlys change by diameter, theextension spring 19 that can stretch is passed through joint smoothly.

The utility model course of work is: earlier bathometer is unclamped from fixed support before the well logging, pulling cotter pilotage 15, trap moves down before and after making, to descend righting wheel 1 to take off (operation of two places, front and back is identical), again swing handle 14 is turned left, make meter wheel separately, cable is put in the middle of two meter wheels, swing handle 14 is gone back to, put back to down righting wheel, the front and back trap is put on again, cotter pilotage 15 is stuck in the groove on the trap, this moment, cable was stuck in the meter wheel, meter wheel rotated thereupon when cable moved, at this moment, with the winch panel opening power supply of measuring appliance adapted, zero clearing has made speed, the degree of depth shows, whether reexamine each wheel afterwards rotates normal, after all are normal, just can begin the work of going into the well, the utility model must be fixed on the support after well logging is finished.

As shown in Figure 4, the pulling force sensor that is contained on top sheave or the lower sheave is delivered to digital intelligent winch panel with the analog signal of the cable stretch that collects, after the A/D conversion is sent into CPU and handled, shows with digital form.Provide every meter 1024 pulse depth signal with the encoder of meter wheel shaft coupling, carry on the cable or transfer by level and just discern, these square-wave signals can be realized the monitoring of depth-logger.1024 pulses that encoder is exported in the utility model are delivered to digital intelligent winch panel and are handled through signal, show depth-logger and speed with digital form, the signal of encoder output also can be transported to numerical control well logging ground acquisition system as driving signal, if it is inconsistent with it that the degree of depth that certain numerical control logging system requires drives signal, then the centre can connect a digital interface.

Claims (1)

1. The depth-logger measuring appliance, it is characterized in that, it is mainly by descending righting wheel 1, last righting wheel 2, guide rail clip 3, extension spring 4, trap 5, body frame 6, marking apparatus 7, parallel shelf 8, meter wheel 9, extension spring 10, encoder 11, diagonal member 12, swing pipe 13, turning handle 14, cotter pilotage 15, support 16 and cylinder 17 to form, and the plunger 20 that is installed together of last righting wheel and nut 21 between spring 18 is arranged, extension spring 19 is arranged between parallel shelf 8.

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