CN114961636A - Fixed-point grouting and sealing method for complex structural stratum of underground coal mine - Google Patents
Fixed-point grouting and sealing method for complex structural stratum of underground coal mineDownload PDFInfo
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- CN114961636A CN114961636ACN202210706334.5ACN202210706334ACN114961636ACN 114961636 ACN114961636 ACN 114961636ACN 202210706334 ACN202210706334 ACN 202210706334ACN 114961636 ACN114961636 ACN 114961636A
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- E—FIXED CONSTRUCTIONS
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- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明属于煤矿机械领域，涉及一种煤矿井下复杂构造地层定点注浆封固方法。The invention belongs to the field of coal mine machinery, and relates to a fixed-point grouting and sealing method for complex structural strata in a coal mine.
背景技术Background technique
我国煤矿地质条件复杂，井下钻孔施工过程中经常钻遇断层、陷落柱等构造破碎地层，在构造破碎地层中钻进时容易出现塌孔、卡钻和抱钻等情况，导致成孔性差、成孔深度浅以及孔内事故等问题，虽然近年来各科研院所经过技术攻关，形成了诸如开分支绕开破碎地层、大倾角穿越破碎地层、分段扩孔钻进、复合定向钻进、下套管护孔以及注水泥浆加固等工艺，但均未能有效解决复杂地层深孔定向钻进遇到的难题。The geological conditions of coal mines in my country are complex. During the construction of underground drilling, structural fractured strata such as faults and collapsed columns are often drilled. When drilling in the structurally fractured strata, hole collapse, sticking, and drilling are prone to occur, resulting in poor porosity, In recent years, various scientific research institutes have made technical breakthroughs, such as opening branches to bypass broken strata, crossing broken strata with large dip angles, segmented hole reaming drilling, compound directional drilling, etc. The technologies such as casing casing protection and cement slurry reinforcement have failed to effectively solve the problems encountered in deep hole directional drilling in complex formations.
近年来逐渐采用注浆加固技术解决构造破碎地层浅孔钻进难的问题，其主要有两种注浆方式，即全孔段注浆加固技术以及局部注浆加固技术，其中全孔段注浆直接在孔口进行封闭并注入注浆材料，存在适应孔段较短、注浆材料浪费大以及注浆加固效果差的问题，而目前局部注浆技术不适用于长钻孔领域的注浆加固，在实际使用中，当钻孔较长时，其封孔器注浆管与高压胶管会在狭小的钻孔中相互缠绕打结，导致爆管事故发生，且在封孔器和高压胶管下放过程中容易磨损封孔器以及高压胶管，容易导致漏浆以及注浆失败，存在注浆孔段短、注浆压力较小以及地层加固效果差等问题。In recent years, grouting reinforcement technology has been gradually adopted to solve the problem of difficult drilling of shallow holes in structurally broken strata. There are mainly two grouting methods, namely full-hole section grouting reinforcement technology and local grouting reinforcement technology. Among them, full-hole section grouting technology Directly sealing the orifice and injecting grouting material has the problems of short adaptable hole section, large waste of grouting material and poor grouting reinforcement effect. However, the current local grouting technology is not suitable for grouting reinforcement in the field of long drilling. , In actual use, when the hole is long, the grouting pipe of the hole sealer and the high-pressure hose will be entangled with each other in the narrow hole, resulting in a pipe burst accident. During the process, it is easy to wear the hole sealer and the high-pressure hose, which can easily lead to grouting leakage and grouting failure. There are problems such as short grouting hole section, low grouting pressure and poor formation reinforcement effect.
发明内容SUMMARY OF THE INVENTION
有鉴于此，本发明为了解决目前煤矿井下深孔定点注浆存在注浆压力低、注浆效果差以及注浆效率低问题，提供一种煤矿井下复杂构造地层定点注浆封固方法。In view of this, in order to solve the problems of low grouting pressure, poor grouting effect and low grouting efficiency in fixed-point grouting of deep holes in coal mines at present, the present invention provides a fixed-point grouting and sealing method for complex structural strata in coal mines.
为达到上述目的，本发明提供如下技术方案：To achieve the above object, the present invention provides the following technical solutions:
一种煤矿井下复杂构造地层定点注浆封固方法，包括以下步骤：A method for fixed-point grouting and sealing of complex structural strata in a coal mine, comprising the following steps:
S1：装配封隔装置：将由安全接头、胶塞座、压差滑套、封隔器及坐封滑套顺次组装的放至预定孔段；S1: Assemble the packing device: put the safety joint, rubber plug seat, differential pressure sliding sleeve, packer and setting sliding sleeve assembled in sequence to the predetermined hole section;
S2：封隔装置坐封：泵入高压清水驱动封隔器张开完成封隔装置与钻孔壁之间环形区域的封固；S2: Packing device setting: pump high-pressure clean water to drive the packer to open to complete the sealing of the annular area between the packing device and the borehole wall;
S3：注浆作业：通过封隔装置开设的注浆通道注入；S3: Grouting operation: inject through the grouting channel opened by the packing device;
S4：清洗注浆材料：投放胶塞清洗注浆材料；S4: Cleaning and grouting material: put rubber stopper to clean and grouting material;
S5：退钻：不同孔深配置的加固材料侯凝时间内，退出钻具。S5: Retraction: Reinforcement materials with different hole depths are configured to exit the drilling tool within the holding time.
进一步，步骤S1中安全接头外接注浆钻杆与钻机。Further, in step S1, the safety joint is externally connected to the grouting drill pipe and the drilling rig.
进一步，步骤S2中封隔器张开完成封固后，继续憋压至坐封滑套打开。Further, after the packer is opened to complete the sealing in step S2, the pressure is continued until the setting sliding sleeve is opened.
进一步，步骤S3中注浆通道外接注浆管柱。Further, in step S3, the grouting channel is externally connected to a grouting pipe string.
进一步，步骤S4中胶塞进入胶塞座后顶替结束。Further, in step S4, the replacement ends after the rubber stopper enters the rubber stopper seat.
进一步，当胶塞顺利进入胶塞座：通过钻机后退注浆管柱一定距离带动封隔器泄压收缩，最后回收封隔装置；当胶塞不能顺利进入胶塞座：继续升压至压差滑套泄压阀打开，保障胶塞顶替顺利进入胶塞座，注浆材料顶替干净。Further, when the rubber plug smoothly enters the rubber plug seat: the grouting pipe string is driven back by the drilling rig for a certain distance to drive the packer to relieve pressure and shrink, and finally the packing device is recovered; when the rubber plug cannot smoothly enter the rubber plug seat: continue to increase the pressure until the pressure difference The sliding sleeve pressure relief valve is opened to ensure that the rubber plug is replaced smoothly into the rubber plug seat, and the grouting material is replaced cleanly.
进一步，步骤S5中，当退钻过程中封隔装置回收顺利：钻机后退注浆管柱一定距离，带动封隔器泄压收缩，回收封隔装置；当退钻过程中封隔装置回收遇阻：通过钻机正转注浆管柱数圈，带动安全接头正旋转，然后后退注浆管柱，安全接头脱开，从而回收注浆管柱，封隔装置则留在孔内。Further, in step S5, when the packing device is recovered smoothly during the withdrawal process: the drilling rig retreats a certain distance from the grouting pipe string to drive the packer to relieve pressure and shrink, and the packing device is recovered; when the recovery of the packing device is blocked during the withdrawal process : The grouting pipe string is rotated forward by the drilling rig several times to drive the safety joint to rotate forward, and then the grouting pipe string is retreated, the safety joint is disengaged, and the grouting pipe string is recovered, and the packing device is left in the hole.
本发明的有益效果在于：The beneficial effects of the present invention are:
1、本发明所公开的煤矿井下复杂构造地层定点注浆封固方法，依次通过封隔装置坐封、注浆作业、清洗注浆材料、退钻，提高了注浆压力、注浆效果以及注浆效率，稳定性好、安全性高，能保证定点注浆加固。1. The fixed-point grouting and sealing method for underground complex structures in coal mines disclosed in the present invention improves grouting pressure, grouting effect and injection rate by setting the packing device, grouting operation, cleaning grouting materials, and withdrawing drilling in sequence. It has high grouting efficiency, good stability and high safety, and can ensure fixed-point grouting reinforcement.
2、本发明所公开的煤矿井下复杂构造地层定点注浆封固方法，退钻过程中，确保回收注浆管柱，节约了成本。2. The fixed-point grouting and sealing method for underground complex structures in a coal mine disclosed in the present invention ensures that the grouting pipe string is recovered during the drilling withdrawal process, thereby saving costs.
本发明的其他优点、目标和特征在某种程度上将在随后的说明书中进行阐述，并且在某种程度上，基于对下文的考察研究对本领域技术人员而言将是显而易见的，或者可以从本发明的实践中得到教导。本发明的目标和其他优点可以通过下面的说明书来实现和获得。Other advantages, objects, and features of the present invention will be set forth in the description that follows, and will be apparent to those skilled in the art based on a study of the following, to the extent that is taught in the practice of the present invention. The objectives and other advantages of the present invention may be realized and attained by the following description.
附图说明Description of drawings
为了使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明作优选的详细描述，其中：In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be preferably described in detail below with reference to the accompanying drawings, wherein:
图1为本发明煤矿井下复杂构造地层定点注浆封固方法中封隔装置的结构示意图。Fig. 1 is a schematic structural diagram of the packing device in the fixed-point grouting and sealing method of the underground complex structure stratum in the coal mine of the present invention.
附图标记：安全接头1、胶塞座2、压差滑套3、封隔器4、坐封滑套5。Reference numerals:
具体实施方式Detailed ways
以下通过特定的具体实例说明本发明的实施方式，本领域技术人员可由本说明书所揭露的内容轻易地了解本发明的其他优点与功效。本发明还可以通过另外不同的具体实施方式加以实施或应用，本说明书中的各项细节也可以基于不同观点与应用，在没有背离本发明的精神下进行各种修饰或改变。需要说明的是，以下实施例中所提供的图示仅以示意方式说明本发明的基本构想，在不冲突的情况下，以下实施例及实施例中的特征可以相互组合。The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only used to illustrate the basic idea of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.
其中，附图仅用于示例性说明，表示的仅是示意图，而非实物图，不能理解为对本发明的限制；为了更好地说明本发明的实施例，附图某些部件会有省略、放大或缩小，并不代表实际产品的尺寸；对本领域技术人员来说，附图中某些公知结构及其说明可能省略是可以理解的。Among them, the accompanying drawings are only used for exemplary description, and represent only schematic diagrams, not physical drawings, and should not be construed as limitations of the present invention; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings will be omitted, The enlargement or reduction does not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the accompanying drawings may be omitted.
本发明实施例的附图中相同或相似的标号对应相同或相似的部件；在本发明的描述中，需要理解的是，若有术语“上”、“下”、“左”、“右”、“前”、“后”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此附图中描述位置关系的用语仅用于示例性说明，不能理解为对本发明的限制，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms “upper”, “lower”, “left” and “right” , "front", "rear" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must be It has a specific orientation, is constructed and operated in a specific orientation, so the terms describing the positional relationship in the accompanying drawings are only used for exemplary illustration, and should not be construed as a limitation of the present invention. situation to understand the specific meaning of the above terms.
如图1所示的一种煤矿井下复杂构造地层定点注浆封固方法，包括以下步骤：As shown in Figure 1, a fixed-point grouting and sealing method for complex structural strata in a coal mine includes the following steps:
S1：装配封隔装置：将由安全接头1、胶塞座2、压差滑套3、封隔器4及坐封滑套5顺次组装的放至预定孔段；安全接头外接注浆钻杆与钻机。S1: Assemble the packing device: put the
S2：封隔装置坐封：泵入高压清水驱动封隔器4张开完成封隔装置与钻孔壁之间环形区域的封固；封隔器4张开完成封固后，继续憋压至坐封滑套5打开。S2: Packer setting: Pump high-pressure clean water to drive
S3：注浆作业：通过封隔装置开设的注浆通道注入；注浆通道外接注浆管柱。S3: Grouting operation: inject through the grouting channel opened by the packing device; the grouting channel is connected to a grouting pipe string.
S4：清洗注浆材料：投放胶塞清洗注浆材料；胶塞进入胶塞座2后顶替结束；S4: Cleaning the grouting material: put the rubber stopper to clean the grouting material; the rubber stopper enters the
当胶塞顺利进入胶塞座2：通过钻机后退注浆管柱一定距离带动封隔器4泄压收缩，最后回收封隔装置；当胶塞不能顺利进入胶塞座2：继续升压至压差滑套3泄压阀打开，保障胶塞顶替顺利进入胶塞座2，注浆材料顶替干净。When the rubber plug smoothly enters the rubber plug seat 2: the grouting pipe string is driven back by the drilling rig for a certain distance to relieve the pressure of the
S5：退钻：不同孔深配置的加固材料侯凝时间内，退出钻具；当退钻过程中封隔装置回收顺利：钻机后退注浆管柱一定距离，带动封隔器4泄压收缩，回收封隔装置；当退钻过程中封隔装置回收遇阻：通过钻机正转注浆管柱数圈，带动安全接头1正旋转，然后后退注浆管柱，安全接头1脱开，从而回收注浆管柱，封隔装置则留在孔内。S5: Retraction: Reinforcement materials with different hole depths are configured to exit the drilling tool within the waiting time; when the packer is recovered smoothly during the drill-out process: the drilling rig retreats the grouting string for a certain distance, which drives the
最后说明的是，以上实施例仅用以说明本发明的技术方案而非限制，尽管参照较佳实施例对本发明进行了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本技术方案的宗旨和范围，其均应涵盖在本发明的权利要求范围当中。Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent replacements, without departing from the spirit and scope of the technical solution, should all be included in the scope of the claims of the present invention.
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| CN118653782A (en)* | 2024-07-08 | 2024-09-17 | 淮北矿业股份有限公司 | A local grouting device and grouting method for downhole inclined drilling |
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| CN204532233U (en)* | 2015-01-04 | 2015-08-05 | 中国石油天然气股份有限公司 | Well cementation tubular column combination |
| CN109296337A (en)* | 2018-10-19 | 2019-02-01 | 东营百华石油技术开发有限公司 | Full-bore exempts to bore plug hook-up for cementing |
| CN111472717A (en)* | 2020-04-24 | 2020-07-31 | 中煤科工集团重庆研究院有限公司 | Fixed-point reinforcing method for long borehole in coal mine |
| CN113107418A (en)* | 2021-03-25 | 2021-07-13 | 中煤科工集团西安研究院有限公司 | Sectional pressure-maintaining grouting device and method for horizontal drilling of coal seam floor aquifer |
| CN113309487A (en)* | 2021-05-24 | 2021-08-27 | 中煤科工集团西安研究院有限公司 | Recoverable fixed-point grouting device and method for directional long drilling hole in underground coal mine |
| CN113494264A (en)* | 2021-07-09 | 2021-10-12 | 中煤科工集团西安研究院有限公司 | Water-resisting layer reinforced grouting transformation device and method based on staged fracturing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118653782A (en)* | 2024-07-08 | 2024-09-17 | 淮北矿业股份有限公司 | A local grouting device and grouting method for downhole inclined drilling |
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