This application is a national stage application of PCT Application No. PCT/CN2019/105545. This Application claims priorities from PCT Application No. PCT/CN2019/105545, filed Sep. 12, 2019, and CN Application No. CN 2018115253612, filed Dec. 13, 2018, the contents of which are incorporated herein in the entirety by reference.
The present invention relates to a multi-rope friction hoisting system in an ultra-deep well, and in particular, to a tension balance system and method for steel wire ropes on a friction hoisting driving end of an ultra-deep well.
During multi-rope friction hoisting in an ultra-deep well, due to errors of steel wire ropes in a manufacturing and installation process and unbalanced loading in a hoisting process, tension of the steel wire ropes is usually unbalanced, and wear degrees of the steel wire ropes are different, thereby directly affecting service lives of the steel wire ropes.
There are a large quantity of steel wire ropes for friction hoisting, lengths and widths of hoisting containers are affected by a cross section of a wellbore, and a distance between the hoisting containers is limited. As a result, a distance between rope grooves is relatively short. Consequently, a distance between side-by-side head sheaves is extremely short in a current conventional friction hoisting manner, and cannot be effectively adjusted.
To resolve a problem of tension imbalance of steel wire ropes, in most current tension balance systems for steel wire ropes, a container tension balance apparatus is used for adjusting tension of steel wire ropes. The apparatus is disposed on a hoisting load end, and has a relatively great self-weight, thereby affecting hoisting and mechanical efficiency; in addition, an adjustment range of a hydraulic tension balance apparatus connected to a container is relatively small, and lengths of ropes need to be adjusted each time adjustment limit positions are reached. Workload for performing maintenance through frequent rope adjustment is great, and working efficiency of a hoisting system is also affected.
To overcome the foregoing disadvantages in the prior art, the present invention provides a tension balance system and method for steel wire ropes on a friction hoisting driving end of an ultra-deep well, which can effectively improve hoisting and mechanical efficiency and substantially adjust tension balance of the steel wire ropes; and can improve hoisting efficiency of a hoisting system without performing maintenance by frequently and manually adjusting the ropes.
To resolve the technical problem, a technical solution used in the present invention is to provide a tension balance system for steel wire ropes on a friction hoisting driving end of an ultra-deep well, including a friction wheel, a left guiding wheel, a right guiding wheel, left steel wire ropes, right steel wire ropes, left adjustment wheels, right adjustment wheels, a left rewinding wheel, a right rewinding wheel, left adjustment oil cylinders, right adjustment oil cylinders, a hydraulic pipeline, a pump station, a pipeline switch group, upper limiting switches, lower limiting switches, a left hoisting container, a right hoisting container, balance ropes, and reels. The friction wheel is disposed in the middle, the left adjustment wheels, the left rewinding wheel, the right adjustment wheels, and the right rewinding wheel are circularly distributed around the friction wheel, the left guiding wheel and the right guiding wheel are horizontally aligned and respectively symmetrically disposed on lower left and lower right of the friction wheel, and a horizontal distance between a vertical tangent on which a right wheel rim of the left guiding wheel is located and a vertical tangent on which a left wheel rim of the right guiding wheel is located is a horizontal distance between the left hoisting container and the right hoisting container; the left adjustment wheels and the right adjustment wheels are horizontally aligned and respectively symmetrically disposed on upper left and upper right of the friction wheel, the left rewinding wheel is disposed between the left adjustment wheels and the left guiding wheel, the right rewinding wheel is disposed between the right adjustment wheels and the right guiding wheel, and the left rewinding wheel and the right rewinding wheel are horizontally aligned and respectively symmetrically disposed on lower left and lower right of the friction wheel; a quantity of the left steel wire ropes and a quantity of the right steel wire ropes are the same and both are even numbers more than 2; one end of each of the left steel wire ropes is connected to the right hoisting container, and the other end passes around the right guiding wheel, the friction wheel, the left rewinding wheel, the friction wheel, the left adjustment wheel, and the left guiding wheel in sequence, and then is connected to the left hoisting container; one end of each of the right steel wire ropes is connected to the right hoisting container, and the other end passes around the right guiding wheel, the right adjustment wheel, the friction wheel, the right rewinding wheel, the friction wheel, and the left guiding wheel in sequence, and then is connected to the left hoisting container; tops of the left hoisting container and the right hoisting container are each fixedly provided with two reels; a left end and a right end of a steel wire rope corresponding to each of the adjustment wheels are connected to the left hoisting container and the right hoisting container by using the reels, and the reels are each connected to two steel wire ropes; lower ends of the left hoisting container and the right hoisting container are connected through the balance ropes; and both a quantity of the adjustment wheels and a quantity of the adjustment oil cylinders are the same as that of the steel wire ropes, both the left adjustment wheels and the right adjustment wheels have a degree of freedom of movement in a radial direction of the friction wheel, the left adjustment wheels are connected to the left adjustment oil cylinders to perform radial driving, the right adjustment wheels are connected to the right adjustment oil cylinders to perform radial driving, both the left adjustment oil cylinders and the right adjustment oil cylinders travel in the radial direction of the friction wheel, the adjustment oil cylinders are connected to the pump station through the hydraulic pipeline, and the hydraulic pipeline is provided with the pipeline switch group; and an outer side and an inner side of each of the left adjustment wheels and the right adjustment wheels in the radial direction of the friction wheel are respectively provided with an upper limiting switch and a lower limiting switch.
Compared with the prior art, a tension balance system and method for steel wire ropes on a friction hoisting driving end of an ultra-deep well of the present invention are set on a driving end, so that hoisting load is not increased and mechanical efficiency can be effectively improved; when tension balance of steel wire ropes on a single side is adjusted, a method for implementing communication through a hydraulic pipeline is first used for adjustment, and then independent adjustment is performed for a problem of a relatively great length difference between the steel wire ropes on the single side that may occur after the adjustment, so that the tension balance system may be maintained to effectively work in a long term; further, substantial tension balance adjustment on the steel wire ropes can be powerfully adaptively performed, and hoisting efficiency of a hoisting system is improved without performing maintenance by frequently and manually adjusting the ropes.
The present invention is further described below with reference to the accompanying drawings and embodiments.
In the drawings: 1. Friction wheel, 2-1. Left guiding wheel, 2-2. Right guiding wheel, 3-1. Left steel wire rope, 3-2. Right steel wire rope, 4-1. Left adjustment wheel, 4-2. Right adjustment wheel, 5-1. Left rewinding wheel, 5-2. Right rewinding wheel, 6-1. Left adjustment oil cylinder, 6-2. Right adjustment oil cylinder, 7. Hydraulic pipeline, 7-1-1. Left hydraulic pipeline, 7-1-2. Left middle hydraulic pipeline, 7-2-1. Right hydraulic pipeline, 7-2-2. Right middle hydraulic pipeline, 7-3. Hydraulic main line, 8. Pump station, 9. Pipeline switch group, 9-1-1. Left pipeline switch, 9-1-2. Left middle pipeline switch, 9-2-1. Right pipeline switch, 9-2-2. Right middle pipeline switch, 10-1. Upper limiting switch, 10-2. Lower limiting switch, 11-1. Left hoisting container, 11-2. Right hoisting container, 12. Balance rope, 13. Reel, 14. Steel wire rope buckle.
In order to make the objectives, technical solutions, and advantages of the present invention more comprehensible, the technical solutions according to embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings of the embodiments of the present invention. Apparently, the embodiments in the following description are merely some rather than all of the embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
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For a tension balance method for steel wire ropes on a friction hoisting driving end of an ultra-deep well of the present invention, reference is made to
In an initial state, the left pipeline switches 9-1-1 are turned off, and the left middle pipeline switch 9-1-2 is turned on, where both the two left adjustment wheels 4-1 are located on middle positions between corresponding upper limiting switches 10-1 and corresponding lower limiting switches 10-2.
When tension of the two left steel wire ropes 3-1 is unbalanced, the two left adjustment wheels 4-1 generate different pressures on the left adjustment oil cylinders 6-1 connected to the left adjustment wheels 4-1, the two adjustment oil cylinders are in communication through the left hydraulic pipelines 7-1-1 and the left middle hydraulic pipeline 7-1-2, an adjustment oil cylinder corresponding to a steel wire rope of the two left steel wire ropes 3-1 that has larger tension has a traveling distance contracted, and a corresponding left adjustment wheel 4-1 will be close to the friction wheel 1 in the radial direction of the friction wheel 1, so that the steel wire rope is slacker than before, and the tension is reduced; an adjustment oil cylinder corresponding to a steel wire rope of the left steel wire ropes 3-1 that has smaller tension has a traveling distance extended, and a corresponding left adjustment wheel 4-1 is far away from the friction wheel 1 in the radial direction of the friction wheel 1, so that the steel wire rope is tauter than before, and the tension is increased; and when the two left steel wire ropes 3-1 have the same tension, the two left adjustment oil cylinders 6-1 no longer act, and the two left adjustment wheels 4-1 no longer move.
In the foregoing adjustment process, if one of the left adjustment wheels 4-1 exceeds a value set by an upper limiting switch 10-1 corresponding to the left adjustment wheel 4-1, the upper limiting switch 10-1 acts, the left middle pipeline switch 9-1-2 is turned off, a left pipeline switch 9-1-1 corresponding to the left adjustment wheel 4-1 is turned on, and the pump station 8 acts, to reduce a hydraulic oil pressure of the left adjustment oil cylinder 6-1, so that the left adjustment wheel 4-1 goes back to the middle position between the upper limiting switch 10-1 and the lower limiting switch 10-2; when the left adjustment wheel 4-1 goes back to the middle position between the upper limiting switch 10-1 and the lower limiting switch, the left pipeline switch 9-1-1 and the left middle pipeline switch 9-1-2 go back to the on-off states of the switches in the initial state; and if one of the left adjustment wheels 4-1 exceeds a value set by a lower limiting switch 10-2 corresponding to the left adjustment wheel 4-1, the lower limiting switch 10-2 acts, the left middle pipeline switch 9-1-2 is turned off, a left pipeline switch 9-1-1 corresponding to the left adjustment wheel 4-1 is turned on, and the pump station 8 acts, to increase a hydraulic oil pressure of the left adjustment oil cylinder 6-1, so that the left adjustment wheel 4-1 goes back to the middle position between the upper limiting switch 10-1 and the lower limiting switch 10-2; when the left adjustment wheel 4-1 goes back to the middle position between the upper limiting switch 10-1 and the lower limiting switch 10-2, the left pipeline switch 9-1-1 and the left middle pipeline switch 9-1-2 go back to the on-off states of the switches in the initial state. This is a method for adjusting tension balance of the left steel wire ropes 3-1.
A method for adjusting tension balance of the right steel wire ropes 3-2 is the same as the above. Details are not described herein again.
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Referring to
Tension balance adjustment of steel wire ropes on different sides on the left hoisting container 11-1 that is close to a left hoisting container end and completed by using the reel 13 is similar to the foregoing adjustment process. Details are not described herein again.
By combining the foregoing tension balance adjustment of the two left steel wire ropes 3-1 and the foregoing tension balance adjustment of the two right steel wire ropes 3-2 that are completed by using a hydraulic element, tension balance adjustment of the two left steel wire ropes 3-1 and the two right steel wire ropes 3-2 on each of the left hoisting container end and the right hoisting container end in this embodiment may be completed.
A quantity of steel wire ropes that may be adjusted in the present invention is not limited to 4 in this embodiment, and may alternatively be 6, 8, or another even number more than 2.
Beneficial effects of the present invention are:
1) The tension balance system is disposed on a driving end, so that additional load generated by adding a tension balance apparatus on a current hoisting container is not increased, and mechanical efficiency can be effectively improved.
2) When tension balance of steel wire ropes on a single side is adjusted, a method for implementing communication through the hydraulic pipeline 7 is first used for adjustment, and then independent adjustment is performed for a problem of a relatively great length difference between the steel wire ropes on the single side that may occur after the adjustment, so that the tension balance system may be maintained to effectively work in a long term.
3) Further, substantial tension balance adjustment on the steel wire ropes can be powerfully adaptively performed, and hoisting efficiency of a hoisting system is improved without performing maintenance by frequently and manually adjusting the ropes.
The foregoing descriptions are merely exemplary embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications and equivalent changes that are made on the foregoing embodiments according to the technical essence of the present invention shall fall within the protection scope of the present invention.
Number | Date | Country | Kind |
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201811525361.2 | Dec 2018 | CN | national |
Filing Document | Filing Date | Country | Kind |
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PCT/CN2019/105545 | 9/12/2019 | WO | 00 |
Publishing Document | Publishing Date | Country | Kind |
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WO2020/119197 | 6/18/2020 | WO | A |
Number | Date | Country |
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203998524 | Dec 2014 | CN |
104590974 | May 2015 | CN |
106865384 | Jun 2017 | CN |
108584617 | Sep 2018 | CN |
109502454 | Mar 2019 | CN |
20070075967 | Jul 2007 | KR |
1533977 | Jan 1990 | SU |
Entry |
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International search report of PCT/CN2019/105545. |
Written opinion of PCT/CN2019/105545. |
The first office action of CN 2018115253612. |
Number | Date | Country | |
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20210053805 A1 | Feb 2021 | US |