SU742582A1 - Logging cable running in and out device - Google Patents

Description

74 rabanami with cable lengths with grips at loose ends. Fig. 1 shows the equipment of the well and the trip equipment; in fig. 2 shows section A-A in FIG. 1 | in fig. 3 — equipment set for descending and lifting an extra-long cable with socket joints; in fig. 4 - a gripping device, allowing the driver to let the connector be loaded under the load via the capstan wheels and wellhead rollers under load; in fig. 5 shows the sequence of operations during the descent and ascent of the cable; in fig. 6 - Suspension winch suspension shown. The device consists of a suspension unit 1, which contains on a common axis 2 several individual rollers 3, a tip drum 4, through which a cable lug 5 is passed, an auxiliary drum 6 with a cable cut 7, a double capstan 8, through which the work cable 9 is passed 10, drill winch 11, additional winch 12 with cable 13; logging winch 14 of logging cable 15 with wire 7 and clamp 16, cable stack 17, which are part of driver 18 with an auxiliary winch (drum) 6, Double capstan 8 is fixed on rack 19 8. Special grip 2O is fixed on cable ends 7, the suspension (grip) 21 is fixed to the cable 13 of the winch 12; sealing the coupling 22 consists of half couplings 23 with grooves 24, branches 25 of the cable 13 are fastened to the lugs 26 with which the plug 27 is provided. The procedure for using the device is as follows. A suspended block 1 is installed at the wellhead on a pulley system of a bph machine, and an add-on block 10 is attached to the drilling rig base. The suspended and open blocks consist of several separate rollers 3 mounted on a common axis 2. At some distance the wellhead there is a lower section consisting of a double capstan 8 of accumulative drum 4 and an auxiliary drum 6 on which is wound from cable cuttings (cable-rope) 7. A soft (working) cable 9 is wound on a drum 4. Cable lug 5 in the root part cable passed through The drum's cheek is attached to the outer side of the schE, and the current-carrying conductors are connected to the bearer (not shown), the free end of the cable 9 is passed through the double 2.4 cable, the rollers of the retractable unit 10, the suspension lock 1 and is lowered into the well. Drilling hole 11 can, as far as it is necessary, lift or lower block 1 with the suspension. IF we assume that for a well of 15 km of a borehole the logging cable is composed of three separate sections of 5-6 km in length, then three logging winches should be installed on the drilling rig. FIG. 3, the winch 18 is for the lower section of the cable, the winch 15 is for the middle section and the winch 14 is for the root. In addition, another auxiliary (optional) winch 12 with a cable (cable) was installed on the drilling rig 13. The logging winches 18, 15 and 14 are almost the same in design. Only winch 14, which does not have a second drum, differs. The winches of the aabestan system include a double capstan 8, wheels of which are cantilevered on a rack 19, a storage drum 4 with a cable stacker 17, an auxiliary drum 6 with a cable 7. The auxiliary drum is rotated either from a capstan drive or from an independent source of mechanical energy . The main drum 4 of the kinematicheok is connected to the capstan wheels 8. At the capstan stand 19, there is a clamp 16, with which you can fix the logging cable 9. The auxiliary (additional) winch 12 also consists of a double capstan, but in principle it can be made and In a variant with a drum drum. At the end of the cable 7, a special grip 2O is reinforced in which a socket for fitting the cable floor of the coupling is fitted. In order not to damage the reservation of armor in the cable half coupling, the grip is made along the radius, which must be consistent with the allowable bending radius of the cable. At the end of the cable 13 fortified grip 21 in the form of a fork. The sealed coupling connecting the armored cable sections consists of half couplings 23. At the ends of the semi-coupling, ring grooves 24 are inserted, which include a gripping fork 21. The gripper consists of a fork 27, fitted with races 26, in which branches of cable 25 of the auxiliary winch 12 are attached. .

Poszholku in the descent and ascent of the cable, involved three logging winch 18, 15 and 14, and auxiliary winch 12, the blocks of the suspension system contain 4 rollers, streams in which are profiled in accordance with the diameter of the cable.

The three-section cable is lowered using the proposed system as follows. The first section is pulled down to the & rotazhny cable using a winch 18. The cable is pulled down until the run on the reel 4 remains only a few turns. They tighten the capstan and fix it to the 15th branch of the cable in clamp 16. Disconnect the cable lug from the drum cheek, roll the remaining turns of the drum and leave the cable lug fixed to the cable 7. Then turn on the flat cable 6, create tension cable 7, release the cable from clamp 16 and lower the first cable section now on cable 7. The gripper 20 passes the wheels of the double cabotan, the rollers of the overhanging blocks, and stops above the rotor of the drilling machine (see Fig. 5, position I). Lock & the end of the second cable section into capstan and rollers of suspension system blocks attach coupling half 23 (see FIG. 5, position W). Thus, the second section of the cable is electrically already connected to the first section, but it does not yet experience a mechanical load. Then, a fork 21 is inserted into one of the grooves 24 of the coupling and, using an auxiliary winch 12, the first section rises so that it can be removed from the cable 2O (see Fig. 5, position IV). However, the second section of the logging cable is still not under load, since the first section hangs in the well on the cable 13 of the auxiliary winch 12. Now it is put into operation

winch 15, lift up a little tension on the cable between the capstan

section of the cable and release the grip 21 and cumulative drum. Workers

auxiliary winch 12 .. logging wagon must be

The second section of the logging cable 5 on capstans, while it should be ready to descend (see Fig. 5, position). There are effective measures to reduce

The cable is descended into the well by the inertia of the active masses of the accumulator, which is similar to how it was done with the primary drums with the cable during the descent. Spread the section, and join the third section between the capstan and the auxiliary station. For the logging winch 14 using a drum of logging winch 18-115

a snare drum is not required. It must be such that when the insurance coils of the insurance cable windings are removed from the base logging cable of the semi-cable, the half-way is as follows. the coupling did not reach the cable stacker

All three sections of the cable are in the well. Raise the first coupling in the upper joint of the segments to the day surface (see Fig. 5, position YL) "Put the gripper 2O of the winch 15 on the coupling half of the second cable section, raise the entire cable so that the coupling half of the upper section of the cable is disconnected (see Fig 5, position I). The cable is pushed up to those ps until the grip 20 fits close to the auxiliary drum of the winch 15. Fix the cable to the clamp 16 on the stand of the braked capstan, release the cable half (from the grip, fix it on the tail of the drum and wind the end of the cable on the drum of the wireline 15 (see Fig. 3), the cable is tensioned between the drum and the inhibited capstan. Then the clamp 16 is removed from the cable and the second section is thus ready to be lifted. Lifting the coupling between the bottom and the medium on the day surface The cable sections prepare the first section of the cable for lifting in the same way as described above. If during lifting by the gripper 20 it turns out that dangerous bending loads occur on the coupling, first use the gripper 21 and the auxiliary winch 12 and lift the cable so that it disconnects the coupling half of the upper section and only then put the grip 2O in operation and the whole cable to nof.On the basis of the described sequence of work performed during the descent and ascent of the composite cable, be some special demands on the apparatus to otazhnyh winches in inbound to (lplekt round-lodemnogo equipment. Logging hoist drums 18 and 15 should be disconnected from the kinematic chains of the double capstan for coiling and winding the cable end and should contain a drive independent of the capstan for the consonant drum and should be able to pull the cable with the help of the grips.

Capstans and suspended systole blocks should have J arrays that would provide the desired grip position relative to the streams. When logging depths, when the couplings are in the area between the wellhead and capstan, it is necessary to use a winch on a drilling machine to lower or raise the upper block of the suspension system. The distance from capstan to the wellhead should be such that the length of the straight cable from the rotor of the drilling machine to is cable tip (at the moment when 2-3 turns are stopped on the drum) is approximately twice the height of the lifting of the upper block of the suspension system above the rotor . Under this condition, when logging 20 to the maximum depth for a given section, the upper block of the suspension system should be lowered. Before starting to pull the cable lug to the rotor, raise the upper block of the harness to 25 maximum height.

The proposed device has the following advantages: it is possible to make a cable of any length from individual segments, while ensuring the required strength and reliability; winches do not cause difficulties in production, since they are not much different in size from existing ones; it provides greater mobility and efficiency in the implementation of well operations, since if there is a failure in any section of the cable, it is enough to replace the faulty section, and not to throw out all 15 km of the cable at once; in the joints of the cable sections, you can create a reliable e-mail foizolyatsiyu current-carrying veins, since the couplings will not be dimensional limitations.

Claims (2)

1. A device for lowering and lifting a logging cable during geophysical surveys of ultradeep wells, containing a suspension wellhead system, a winch of a capstan system, characterized in that, in order to increase reliability when descending on a cable of different diameters, it has an additional winch of a cabel system for each cable diameter and winch with cargo cable with suspension at the end, where the logging winches of the railway system are equipped with auxiliary drums with cable cuts, with grips at the free ends. 2. Device pop. 1, differing from the fact that the profiles of the individual rollers of the suspension system are made in accordance with the diameters of the cable and cargo cable section. Sources of information that are cognitively taken into account during the examination 1. USSR author's certificate No. 367043, cl. Е 21 В 47 / ОО, 197О. 2. US patent number 4003435, cl. 74-23O.17.S, 1975 (prototype). diA w H- / H- / h   . FIG. 2 jf.S