CN110608034A - An isolation seal integrity detection device and method - Google Patents
An isolation seal integrity detection device and method Download PDFInfo
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- CN110608034A CN110608034A CN201910810266.5A CN201910810266A CN110608034A CN 110608034 A CN110608034 A CN 110608034A CN 201910810266 A CN201910810266 A CN 201910810266A CN 110608034 A CN110608034 A CN 110608034A
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- 238000002955 isolation Methods 0.000 title claims abstract description 78
- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 37
- 238000007689 inspection Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 57
- 210000002445 nipple Anatomy 0.000 claims description 18
- 239000012530 fluid Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 1
- 235000017491 Bambusa tulda Nutrition 0.000 claims 1
- 241001330002 Bambuseae Species 0.000 claims 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 1
- 239000011425 bamboo Substances 0.000 claims 1
- 238000010998 test method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004364 calculation method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
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Abstract
本发明公开了一种隔离密封完整性检测装置，包括验封工作筒和验封仪器串，所述验封仪器串包括从上至下依次密封连接的上压力计护筒、上压力安装座、内部过流短节、流量计上接头、流量计和流量计下接头，在所述上压力计护筒内装有上压力计，所述上压力计由所述上压力安装座支撑。内置流量计和压力计，用于测量油套环空和装置内环空的压差以及隔离密封的漏失流量。本发明还公开了一种应用上述装置的隔离密封完整性检测方法，通过计算公式反推出隔离密封与套管的偏心距，进而定量地获知隔离密封的完整性状况，准确确定隔离密封的密封性能，从而选择适当的插入密封类别，保证分层注水效果。
The invention discloses an isolation seal integrity detection device, which includes a seal inspection working cylinder and a seal inspection instrument string, and the seal inspection instrument string includes an upper pressure gauge casing, an upper pressure mounting seat, The internal flow sub-joint, the upper joint of the flow meter, the flow meter and the lower joint of the flow meter, the upper pressure gauge is installed in the casing of the upper pressure gauge, and the upper pressure gauge is supported by the upper pressure mounting seat. Built-in flow and pressure gauges to measure the differential pressure between the oil jacket annulus and the inner annulus of the unit as well as the leakage flow of the isolation seal. The invention also discloses a method for detecting the integrity of the isolation seal using the above-mentioned device. The eccentric distance between the isolation seal and the sleeve is deduced through the calculation formula, and then the integrity of the isolation seal is quantitatively known, and the sealing performance of the isolation seal is accurately determined. , so as to select the appropriate type of insert seal to ensure the effect of layered water injection.
Description
技术领域technical field
本发明涉及属于海上油田井下隔离密封完整性检测的技术领域，特别适用海上油田分层开采井下隔离密封由于长期在井下作业受到磨损、腐蚀导致无法对隔离密封进行完整性检测的情况。The invention relates to the technical field of integrity detection of downhole isolation seals in offshore oilfields, and is particularly suitable for the situation that the integrity detection of the isolation seals cannot be performed due to long-term downhole operation due to wear and corrosion of downhole isolation seals in layered production in offshore oilfields.
背景技术Background technique
由于油层的非均质性，各层的地层压力不同，只有根据具体地层油藏参数，采取不同开采方式，才能提高开采效率。分层开采可提高单井的利用效率。插入密封与隔离密封配合组成的密封总成的质量好坏直接决定着分层效果的优劣。根据现在工艺设计要求，井下实施分层注水工艺，需要对密封总成中的隔离密封进行检测。Due to the heterogeneity of the oil layer, the formation pressure of each layer is different. Only by adopting different production methods according to the specific formation and reservoir parameters can the production efficiency be improved. Layered mining can improve the utilization efficiency of a single well. The quality of the sealing assembly composed of the insertion seal and the isolation seal directly determines the quality of the delamination effect. According to the current process design requirements, to implement the layered water injection process downhole, it is necessary to test the isolation seal in the seal assembly.
目前海上油田利用带有插入密封的、带孔的管柱对隔离密封进行检测，管柱下入对应的隔离密封中，管内打压，通过井口压力变化定性判断隔离密封是否存在破损，不能定量地判断漏失。也无法判断生产管柱与隔离密封构成的隔离密封总成是否有密封缺陷，若油管密封失效，会导致检测不准确。并且油田泵压不稳压，压力波动较大，有引发提前坐封的可能，若管柱提前坐封，将导致无法检测。因此，需要定量判断隔离密封的密封状态，从而选择合适的入井插入密封，保证分层注水效果，对油田开发生产，增产稳产具有重要的社会效益和推广应用价值。At present, offshore oilfields use pipe strings with insert seals and holes to test the isolation seals. The pipe strings are lowered into the corresponding isolation seals, and the pressure inside the pipes is used to qualitatively determine whether the isolation seals are damaged by wellhead pressure changes. Quantitative judgments cannot be made. missing. It is also impossible to judge whether the isolation seal assembly composed of the production tubing string and the isolation seal has sealing defects. If the oil pipe seal fails, the detection will be inaccurate. In addition, the pump pressure in the oil field is not stable, and the pressure fluctuates greatly, which may lead to early setting. If the pipe string is set in advance, it will lead to failure to detect. Therefore, it is necessary to quantitatively judge the sealing state of the isolation seal, so as to select the appropriate well insertion seal to ensure the effect of layered water injection, which has important social benefits and application value for oilfield development and production, increasing production and stabilizing production.
发明内容Contents of the invention
本发明为解决公知技术中存在的技术问题而提供一种隔离密封完整性检测装置和方法，该装置能够测得用于定量判断隔离密封完整性的压差和流量，该方法利用上述压差和流量能够定量地判断隔离密封的完整性。In order to solve the technical problems existing in the known technology, the present invention provides a device and method for detecting the integrity of the isolation seal. The device can measure the pressure difference and flow rate for quantitatively judging the integrity of the isolation seal. Flow rate can quantitatively judge the integrity of the isolation seal.
本发明为解决公知技术中存在的技术问题所采取的一个技术方案是：一种隔离密封完整性检测装置，包括验封工作筒和验封仪器串，所述验封工作筒包括从上至下依次密封连接的工作筒上接头、外部过流短节、流量计短节和工作筒下接头，在所述流量计短节上设有水嘴以及位于所述水嘴上方的密封模块Ⅰ和位于所述水嘴上方的密封模块Ⅱ，检测时，所述密封模块Ⅰ和所述密封模块Ⅱ密封在被检隔离密封内部；所述验封仪器串包括从上至下依次密封连接的上压力计护筒、上压力安装座、内部过流短节、流量计上接头、流量计和流量计下接头，在所述上压力计护筒内装有上压力计，所述上压力计由所述上压力安装座支撑，在所述上压力安装座内设有传压腔Ⅰ和与所述传压腔Ⅰ连通的传压孔Ⅰ，所述验封仪器串压装在所述验封工作筒内，顶部设有压环，所述压环与所述工作筒上接头固接，所述流量计下接头与所述工作筒下接头密封固接，所述流量计上接头与所述流量计短节的上端部密封固接，所述内部过流短节设有封头和过流筒，所述内部过流短节的封头和所述上压力安装座分别与所述外部过流短节密封固接，在所述压环上设有桥式通道Ⅰ，在所述工作筒上接头与所述上压力计护筒之间构成有装置内环空Ⅰ，在所述上压力计护筒上设有与所述装置内环空Ⅰ连通的传压孔Ⅱ，所述传压孔Ⅱ将所述装置内环空Ⅰ的压力传递给所述上压力计，在所述外部过流短节上设有桥式通道Ⅱ和传压孔Ⅲ，所述传压孔Ⅲ与所述传压孔Ⅰ连通，将油套环空的压力通过所述传压腔Ⅰ传递给所述上压力计，在所述外部过流短节和所述内部过流短节的过流筒之间构成有位于所述桥式通道Ⅱ下方的装置内环空Ⅱ，在所述内部过流短节的过流筒上设有连通所述装置内环空Ⅱ与所述内部过流短节的过流筒内部的过流孔，在所述流量计短节与所述流量计之间构成有装置内环空Ⅲ，所述桥式通道Ⅰ、所述装置内环空Ⅰ、所述桥式通道Ⅱ、所述装置内环空Ⅱ、所述内部过流短节的过流筒、所述流量计上接头、所述流量计、所述装置内环空Ⅲ和所述水嘴从上至下依次连通构成流量测量通路。A technical solution adopted by the present invention to solve the technical problems existing in the known technology is: an isolation seal integrity detection device, including a seal inspection work cylinder and a seal inspection instrument string, the seal inspection work cylinder includes a top-to-bottom The upper joint of the working cylinder, the external overflow sub-joint, the flow meter sub-joint and the lower sub-joint of the working cylinder, which are connected in sequence, are provided with a water nozzle and a sealing module I above the water nozzle and located on the flow meter sub-joint. The sealing module II above the faucet, when testing, the sealing module I and the sealing module II are sealed inside the isolation seal to be tested; the seal inspection instrument string includes upper pressure gauges that are sequentially sealed and connected from top to bottom Casing, upper pressure mounting seat, internal flow nipple, flowmeter upper joint, flowmeter and flowmeter lower joint, an upper pressure gauge is installed in the upper pressure gauge casing, and the upper pressure gauge is controlled by the upper Supported by the pressure installation seat, a pressure transmission chamber I and a pressure transmission hole I connected with the pressure transmission chamber I are arranged in the upper pressure installation seat, and the seal inspection instrument is serially installed in the seal inspection working cylinder , the top is provided with a pressure ring, the pressure ring is fixedly connected to the upper joint of the working cylinder, the lower joint of the flowmeter is sealed and fixedly connected to the lower joint of the working cylinder, and the upper joint of the flowmeter is short to the flowmeter The upper end of the joint is sealed and fixed, the internal flow sub-joint is provided with a head and a flow tube, the head of the internal flow sub-joint and the upper pressure mounting seat are respectively connected Sealed and fixed, a bridge channel I is provided on the pressure ring, and an inner annular space I of the device is formed between the upper joint of the working cylinder and the upper pressure gauge casing, and the upper pressure gauge casing There is a pressure transmission hole II connected with the inner annular space I of the device, and the pressure transmission hole II transmits the pressure of the inner annular space I of the device to the upper pressure gauge. The upper part is provided with a bridge channel II and a pressure transmission hole III, the pressure transmission hole III communicates with the pressure transmission hole I, and transmits the pressure in the annular space of the oil jacket to the upper pressure gauge through the pressure transmission chamber I, An inner annulus II located below the bridge channel II is formed between the outer flow joint and the flow barrel of the inner flow joint, and the flow in the inner flow joint The barrel is provided with an overflow hole connecting the inner annular space II of the device and the inner overflow barrel of the inner overflow joint, and the inner annular space of the device is formed between the flow meter joint and the flow meter III, the bridge channel I, the inner annulus I of the device, the bridge channel II, the inner annulus II of the device, the flow barrel of the internal flow nipple, the upper joint of the flowmeter , the flow meter, the annular space III in the device and the faucet are sequentially connected from top to bottom to form a flow measurement passage.
在所述流量计下接头的下方设有与其连接的下压力计护筒，在所述下压力计护筒的下方设有与其连接的导向头，在所述下压力计护筒内装有下压力计，所述下压力计由所述导向头支撑，在所述导向头内设有传压腔Ⅱ和与所述传压腔Ⅱ连通的传压孔Ⅳ，所述下压力护筒和所述导向头位于所述工作筒下接头内部，在所述工作筒下接头与所述下压力计护筒和所述导向头之间构建有装置内环空Ⅳ，在所述工作筒下接头上设有与所述装置内环空Ⅳ连通的传压孔Ⅴ，在所述下压力计护筒上设有与所述装置内环空Ⅳ连通的传压孔Ⅵ，油套环空的压力依次经过所述装置内环空Ⅳ、所述传压孔Ⅳ和所述传压腔Ⅱ传递给所述下压力计，油套环空的压力依次经过所述传压孔Ⅴ、所述装置内环空Ⅳ和所述传压孔Ⅵ传递给所述下压力计。Below the lower joint of the flow meter, there is a lower pressure gauge casing connected to it, and a guide head connected to it is provided under the lower pressure gauge casing, and a lower pressure gauge casing is installed in the lower pressure gauge casing. The down pressure gauge is supported by the guide head, and a pressure transmission chamber II and a pressure transmission hole IV communicating with the pressure transmission chamber II are arranged in the guide head, and the down pressure casing and the The guide head is located inside the lower joint of the working cylinder, and an inner annular space IV of the device is constructed between the lower joint of the working cylinder, the lower pressure gauge casing and the guide head, and the lower joint of the working cylinder is provided with There is a pressure transmission hole V connected with the inner annular space IV of the device, and a pressure transmission hole VI connected with the inner annular space IV of the device is provided on the casing of the lower pressure gauge, and the pressure of the oil jacket annular space passes through in turn The inner annular space IV of the device, the pressure transmission hole IV and the pressure transmission chamber II are transmitted to the lower pressure gauge, and the pressure in the oil jacket annular space passes through the pressure transmission hole V, the inner annular space of the device successively. IV and the pressure transmission hole VI are transmitted to the down pressure gauge.
所述密封模块Ⅰ和所述密封模块Ⅱ各有两道，其中两道所述密封模块Ⅰ和一道所述密封模块Ⅱ均固装在所述流量计短节上，另一道所述密封模块Ⅱ固装在所述工作筒下接头上。The sealing module I and the sealing module II each have two, wherein two of the sealing modules I and one of the sealing modules II are fixed on the flowmeter nipple, and the other sealing module II It is fixedly mounted on the lower joint of the working cylinder.
本发明为解决公知技术中存在的技术问题所采取的另一个技术方案是：一种应用上述装置的隔离密封完整性检测方法，当井筒中隔离密封与套管之间形成偏心环形缝隙时，采用所述装置测得油套环空和装置内环空的压差Δp以及隔离密封的漏失流量q，利用如下公式计算隔离密封与套管的偏心距e：Another technical solution adopted by the present invention to solve the technical problems existing in the known technology is: a method for detecting the integrity of the isolation seal using the above-mentioned device, when an eccentric annular gap is formed between the isolation seal and the casing in the wellbore, using The device measures the pressure difference Δp between the oil jacket annulus and the inner annulus of the device and the leakage flow q of the isolation seal, and uses the following formula to calculate the eccentricity e of the isolation seal and the casing:
其中：q：偏心环形缝隙流的流量，采用流量计测得，Δp：油套环空和装置内环空的压差，采用上流量计测得，μ：为井筒中流体的粘度，L：为隔离密封的长度，D：为套管半径和隔离密封半径之和，h0：为套管半径和隔离密封半径之差，e：隔离密封与套管的偏心距。Among them: q: flow rate of eccentric annular gap flow, measured by flowmeter, Δp: pressure difference between oil casing annulus and device inner annulus, measured by upper flowmeter, μ: viscosity of fluid in wellbore, L: is the length of the isolation seal, D: the sum of the casing radius and the isolation seal radius, h 0 : the difference between the casing radius and the isolation seal radius, e: the eccentric distance between the isolation seal and the casing.
本发明具有的优点和积极效果是：通过检测装置内置的流量计和压力计测得油套环空和装置内环空的压差以及隔离密封的漏失流量，通过计算公式计算出隔离密封与套管的偏心距，进而定量地获知隔离密封的完整性状况，准确确定隔离密封的密封性能，从而选择适当的插入密封类别，保证分层注水效果。并且采用本发明提供的检测装置可以判定隔离密封总成是否有密封缺陷，且不存在提前坐封不能检测的问题。The advantages and positive effects of the present invention are: the pressure difference between the oil jacket annulus and the inner annulus of the device and the leakage flow rate of the isolation seal are measured by the built-in flowmeter and pressure gauge of the detection device, and the isolation seal and sleeve are calculated by the calculation formula. The eccentricity of the pipe can be used to quantitatively obtain the integrity of the isolation seal, accurately determine the sealing performance of the isolation seal, and then select the appropriate type of insert seal to ensure the effect of layered water injection. And the detection device provided by the present invention can determine whether the isolation sealing assembly has a sealing defect, and there is no problem that the sealing cannot be detected in advance.
附图说明Description of drawings
图1为本发明一种隔离密封完整性检测装置的结构示意图；Fig. 1 is a schematic structural view of an isolation seal integrity detection device of the present invention;
图2为图1的C-C剖面图；Fig. 2 is the C-C sectional view of Fig. 1;
图3为本发明一种隔离密封完整性检测装置的验封工作筒结构示意图；Fig. 3 is a structural schematic diagram of a seal inspection work cylinder of an isolation seal integrity detection device of the present invention;
图4为图3的C-C剖面图；Fig. 4 is the C-C sectional view of Fig. 3;
图5为本发明一种隔离密封完整性检测装置的验封仪器串结构示意图；Fig. 5 is a schematic structural diagram of a seal inspection instrument string of an isolation seal integrity detection device of the present invention;
图6为图5的D-D剖面图；Fig. 6 is the D-D sectional view of Fig. 5;
图7为本发明一种隔离密封完整性检测装置应用的结构示意图；Fig. 7 is a schematic structural diagram of the application of an isolation seal integrity detection device according to the present invention;
图8为本发明一种隔离密封完整性检测方法的计算原理图。Fig. 8 is a calculation principle diagram of a method for detecting integrity of an isolation seal according to the present invention.
图中：1、验封工作筒；1-1、工作筒上接头；1-2、外部过流短节；1-2-1、桥式通道Ⅱ；1-2-2、传压孔Ⅲ；1-3、流量计短节；1-4、工作筒下接头；1-4-1、传压孔Ⅴ；1-5、密封模块Ⅰ；1-6、水嘴；1-7、密封模块Ⅱ；In the figure: 1. Seal inspection work cylinder; 1-1, upper joint of work cylinder; 1-2, external flow joint; 1-2-1, bridge channel Ⅱ; 1-2-2, pressure transmission hole Ⅲ ;1-3, flowmeter nipple; 1-4, working cylinder lower joint; 1-4-1, pressure transmission hole Ⅴ; 1-5, sealing module Ⅰ; 1-6, faucet; 1-7, sealing Module II;
2、验封仪器串；2-1、上压力计护筒；2-1-1、传压孔Ⅱ；2-2、上压力安装座；2-2-1、传压腔Ⅰ；2-2-2、传压孔Ⅰ；2-3、内部过流短节；2-3-1、过流孔；2-4、流量计上接头； 2-5、流量计；2-6、流量计下接头；2-7、上压力计；2-8、下压力计护筒；2-8-1、传压孔Ⅵ；2-9、导向头；2-9-1、传压腔Ⅱ；2-9-2、传压孔Ⅳ；2-10、下压力计；2. Seal inspection instrument string; 2-1, upper pressure gauge casing; 2-1-1, pressure transmission hole II; 2-2, upper pressure mounting seat; 2-2-1, pressure transmission chamber I; 2- 2-2. Pressure transmission hole Ⅰ; 2-3. Internal flow nipple; 2-3-1. Flow hole; 2-4. Flowmeter upper joint; 2-5. Flowmeter; 2-6. Flow Gauge lower joint; 2-7, upper pressure gauge; 2-8, lower pressure gauge casing; 2-8-1, pressure transmission hole VI; 2-9, guide head; 2-9-1, pressure transmission chamber II ; 2-9-2, pressure transmission hole IV; 2-10, down pressure gauge;
3、压环；3-1、桥式通道Ⅰ；3. Pressure ring; 3-1. Bridge channel Ⅰ;
4-1、装置内环空Ⅰ；4-2、装置内环空Ⅱ；4-3、装置内环空Ⅲ；4-4、装置内环空Ⅳ。4-1. The inner annular space of the device I; 4-2. The inner annular space II of the device; 4-3. The inner annular space III of the device; 4-4. The inner annular space IV of the device.
具体实施方式Detailed ways
为能进一步了解本发明的发明内容、特点及功效，兹例举以下实施例，并配合附图详细说明如下：In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:
请参阅图1～图6，一种隔离密封完整性检测装置，包括验封工作筒1和验封仪器串2。Please refer to FIG. 1 to FIG. 6 , a device for detecting the integrity of an isolation seal, including a seal checking work cylinder 1 and a seal checking instrument string 2 .
所述验封工作筒包括从上至下依次密封连接的工作筒上接头1-1、外部过流短节1-2、流量计短节1-3和工作筒下接头1-4，在所述流量计短节1-3上设有水嘴1-6以及位于所述水嘴1-6上方的密封模块Ⅰ1-5和位于所述水嘴上方的密封模块Ⅱ1-7，检测时，所述密封模块Ⅰ1-5和所述密封模块Ⅱ1-7密封在被检隔离密封内部。The seal inspection mandrel includes the upper joint 1-1 of the mandrel, the outer joint 1-2 of the flow meter, the joint 1-3 of the flow meter and the lower joint 1-4 of the mandrel, which are connected in sequence from top to bottom. The flowmeter nipple 1-3 is provided with a faucet 1-6, a sealing module I1-5 above the faucet 1-6, and a sealing module II1-7 above the faucet. During detection, the The sealing module I1-5 and the sealing module II1-7 are sealed inside the isolation seal to be checked.
所述验封仪器串2包括从上至下依次密封连接的上压力计护筒2-1、上压力安装座2-2、内部过流短节2-3、流量计上接头2-4、流量计2-5和流量计下接头2-6，在所述上压力计护筒2-1内装有上压力计2-7，所述上压力计2-7由所述上压力安装座2-2支撑，在所述上压力安装座2-2内设有传压腔Ⅰ2-2-1和与所述传压腔Ⅰ2-2-1连通的传压孔Ⅰ 2-2-2。The seal inspection instrument string 2 includes an upper pressure gauge casing 2-1, an upper pressure mounting seat 2-2, an internal overflow sub-joint 2-3, an upper flowmeter joint 2-4, which are sequentially sealed and connected from top to bottom. The flowmeter 2-5 and the flowmeter lower joint 2-6, the upper pressure gauge 2-7 is installed in the upper pressure gauge casing 2-1, and the upper pressure gauge 2-7 is controlled by the upper pressure mounting seat 2 -2 support, a pressure transmission chamber I2-2-1 and a pressure transmission hole I2-2-2 communicating with the pressure transmission chamber I2-2-1 are provided in the upper pressure mounting seat 2-2.
所述验封仪器串2压装在所述验封工作筒1内，顶部设有压环3，所述压环3与所述工作筒上接头1-1固接。The seal inspection instrument string 2 is press-fitted in the seal inspection work cylinder 1, and a pressure ring 3 is provided on the top, and the pressure ring 3 is fixedly connected to the upper joint 1-1 of the work cylinder.
所述流量计下接头2-6与所述工作筒下接头1-4密封固接。The lower joint 2-6 of the flowmeter is sealed and firmly connected with the lower joint 1-4 of the working barrel.
所述流量计上接头2-4与所述流量计短节1-3的上端部密封固接。The upper joint 2-4 of the flow meter is sealed and firmly connected with the upper end of the short joint 1-3 of the flow meter.
所述内部过流短节2-3设有封头和过流筒，所述内部过流短节2-3的封头和所述上压力安装座2-2分别与所述外部过流短节1-2密封固接。The internal flow joint 2-3 is provided with a head and a flow barrel, and the head of the internal flow joint 2-3 and the upper pressure mounting seat 2-2 are respectively connected to the external flow short Section 1-2 is sealed and fixed.
在所述压环3上设有桥式通道Ⅰ3-1。A bridge channel I3-1 is provided on the pressure ring 3 .
在所述工作筒上接头1-1与所述上压力计护筒2-1之间构成有装置内环空Ⅰ4-1。An annular space I4-1 inside the device is formed between the upper joint 1-1 of the working cylinder and the upper manometer casing 2-1.
在所述上压力计护筒2-1上设有与所述装置内环空Ⅰ4-1连通的传压孔Ⅱ2-1-1，所述传压孔Ⅱ2-1-1将所述装置内环空Ⅰ4-1的压力传递给所述上压力计2-7。The upper pressure gauge casing 2-1 is provided with a pressure transmission hole II2-1-1 communicating with the inner annular space I4-1 of the device, and the pressure transmission hole II2-1-1 connects the inner space of the device The pressure of the annulus I 4-1 is transmitted to the upper pressure gauge 2-7.
在所述外部过流短节1-2上设有桥式通道Ⅱ1-2-1和传压孔Ⅲ1-2-2，所述传压孔Ⅲ 1-2-2与所述传压孔Ⅰ2-2-2连通，将油套环空的压力通过所述传压腔Ⅰ2-2-1传递给所述上压力计2-7。Bridge channel II1-2-1 and pressure transmission hole III1-2-2 are provided on the external flow joint 1-2, and the pressure transmission hole III 1-2-2 and the pressure transmission hole I2 -2-2 is connected to transmit the pressure of the oil jacket annulus to the upper pressure gauge 2-7 through the pressure transmission chamber I2-2-1.
在所述外部过流短节1-2和所述内部过流短节2-3的过流筒之间构成有位于所述桥式通道Ⅱ1-2-1下方的装置内环空Ⅱ4-2。Between the outer flow joint 1-2 and the flow barrel of the inner flow joint 2-3, an inner annular space II4-2 located below the bridge channel II1-2-1 is formed. .
在所述内部过流短节2-3的过流筒上设有连通所述装置内环空Ⅱ4-2与所述内部过流短节2-3的过流筒内部的过流孔2-3-1。On the flow barrel of the internal flow joint 2-3, there is an flow hole 2- that communicates with the internal annular space II4-2 of the device and the flow barrel of the internal flow joint 2-3. 3-1.
在所述流量计短节1-3与所述流量计2-5之间构成有装置内环空Ⅲ4-3。An annular space III 4-3 inside the device is formed between the flowmeter nipple 1-3 and the flowmeter 2-5.
所述桥式通道Ⅰ3-1、所述装置内环空Ⅰ4-1、所述桥式通道Ⅱ1-2-1、所述装置内环空Ⅱ4-2、所述内部过流短节2-3的过流筒、所述流量计上接头2-4、所述流量计2-5、所述装置内环空Ⅲ4-3和所述水嘴1-6从上至下依次连通构成流量测量通路。请参阅图2，图中虚线示出了上述流量测量通路。The bridge channel I3-1, the inner annular space of the device I4-1, the bridge channel II1-2-1, the inner annular space II4-2 of the device, and the internal flow nipple 2-3 The flow tube, the flow meter upper joint 2-4, the flow meter 2-5, the inner annular space III 4-3 of the device and the water nozzle 1-6 are connected in sequence from top to bottom to form a flow measurement channel . Please refer to Fig. 2, the dotted line in the figure shows the above-mentioned flow measurement path.
在本实施例中，在所述流量计下接头2-6的下方设有与其连接的下压力计护筒2-8，在所述下压力计护筒2-8的下方设有与其连接的导向头2-9，在所述下压力计护筒2-8内装有下压力计2-10，所述下压力计2-10由所述导向头2-9支撑，在所述导向头2-9内设有传压腔Ⅱ2-9-1和与所述传压腔Ⅱ2-9-1连通的传压孔Ⅳ2-9-2；所述下压力护筒2-8和所述导向头2-9位于所述工作筒下接头1-4内部，在所述工作筒下接头1-4与所述下压力计护筒2-8和所述导向头2-9之间构建有装置内环空Ⅳ4-4；在所述工作筒下接头1-4上设有与所述装置内环空Ⅳ4-4连通的传压孔Ⅴ1-4-1，在所述下压力计护筒2-8上设有与所述装置内环空Ⅳ4-4连通的传压孔Ⅵ2-8-1，油套环空的压力依次经过所述装置内环空Ⅳ 4-4、所述传压孔Ⅳ2-9-2和所述传压腔Ⅱ2-9-1传递给所述下压力计2-10，油套环空的压力依次经过所述传压孔Ⅴ1-4-1、所述装置内环空Ⅳ4-4和所述传压孔Ⅵ2-8-1传递给所述下压力计2-10，所述下压力计2-10可以测得在下油层油套环空的压力，可用于辅助判断在上油层的验封结果。In this embodiment, a lower pressure gauge casing 2-8 connected thereto is provided below the flowmeter lower joint 2-6, and a lower pressure gauge casing 2-8 connected thereto is provided below the lower pressure meter casing 2-8. Guide head 2-9, a lower pressure gauge 2-10 is housed in the lower pressure gauge casing 2-8, and the lower pressure gauge 2-10 is supported by the guide head 2-9, and the lower pressure gauge 2-10 is supported by the guide head 2-9. -9 is provided with a pressure transmission chamber II2-9-1 and a pressure transmission hole IV2-9-2 communicating with the pressure transmission chamber II2-9-1; the lower pressure casing 2-8 and the guide head 2-9 is located inside the lower joint 1-4 of the working cylinder, and a device is built between the lower joint 1-4 of the working cylinder, the lower pressure gauge casing 2-8 and the guide head 2-9. Annulus IV4-4; on the lower joint 1-4 of the working cylinder, there is a pressure transmission hole V1-4-1 communicating with the inner annulus IV4-4 of the device, and on the lower pressure gauge casing 2- 8 is provided with a pressure transmission hole VI2-8-1 communicating with the inner annular space IV4-4 of the device, and the pressure in the annular space of the oil jacket passes through the inner annular space IV4-4 of the device, the pressure transmission hole IV2 -9-2 and the pressure transmission chamber II2-9-1 are transmitted to the lower pressure gauge 2-10, and the pressure in the oil jacket annulus passes through the pressure transmission hole V1-4-1, the inner ring of the device in turn The air IV 4-4 and the pressure transmission hole VI 2-8-1 are transmitted to the down pressure gauge 2-10, and the down pressure gauge 2-10 can measure the pressure in the oil casing annulus of the lower oil layer, which can be used to assist judgment The seal inspection results in the upper oil layer.
在本实施例中，所述密封模块Ⅰ1-5和所述密封模块Ⅱ1-7各有两道，其中两道所述密封模块Ⅰ1-5和一道所述密封模块Ⅱ1-7均固装在所述流量计短节1-3上，另一道所述密封模块Ⅱ1-7固装在所述工作筒下接头上，这种结构能够加强检测装置与隔离密封间的密封。In this embodiment, there are two sealing modules I1-5 and two sealing modules II1-7, wherein two sealing modules I1-5 and one sealing module II1-7 are fixed in the The flowmeter sub-joint 1-3, and the other sealing module II1-7 are fixedly installed on the lower joint of the working cylinder. This structure can strengthen the seal between the detection device and the isolation seal.
下面举例说明上述检测装置的应用，请参见图7，图中a-油管；b-套管；c-定位接头； d-顶部隔离密封；e-防砂筛管；f-隔离密封；g-隔离密封；h-检测装置；i-堵头。检测时，将检测装置h通过丝扣连接在油管a上，在油管a的底部装有堵头i，构成检测管柱，下入套管b中，在套管b上固定有顶部隔离密封d、隔离密封f及隔离密封g，顶部隔离密封d、隔离密封f及隔离密封g将套管b与油管a之间环空分为四层，隔离密封f和隔离密封g之间的分层为注水层，且中间连接有可以让液体流过的防砂筛管e，检测时，检测装置h的密封模块Ⅰ和密封模块Ⅱ密封在隔离密封器g上。The following is an example to illustrate the application of the above detection device, please refer to Figure 7, in the figure a-oil pipe; b-casing; c-positioning joint; d-top isolation seal; e-sand control screen; f-isolation seal; g-isolation Seal; h-detection device; i-plug. During detection, the detection device h is connected to the oil pipe a through a screw, and a plug i is installed at the bottom of the oil pipe a to form a detection pipe string, which is lowered into the casing b, and the top isolation seal d is fixed on the casing b , isolation seal f and isolation seal g, top isolation seal d, isolation seal f and isolation seal g divide the annulus between casing b and tubing a into four layers, and the layers between isolation seal f and isolation seal g are The water injection layer is connected with a sand control screen e through which liquid can flow. During detection, the sealing module I and sealing module II of the detection device h are sealed on the isolation sealer g.
具体操作步骤为：The specific operation steps are:
1)组装检测装置h：地面将上端压力计、下端压力计和流量计接电，记录接电时间。将组装好的验封仪器串投放于验封工作筒内，确保各扣型连接完好。1) Assemble the detection device h: connect the upper pressure gauge, the lower pressure gauge and the flowmeter to the ground, and record the power connection time. Put the assembled seal inspection instrument string into the seal inspection working cylinder to ensure that the connection of each button is intact.
2)将检测装置h接入油管a，按照管柱组合。2) Connect the detection device h to the tubing a, and combine them according to the tubing strings.
3)下入检测管柱并定位：管柱下压2～3T，定位接头c的密封到位后，检测装置h 越过隔离密封器g，连接循环管线，小排量循环，压力没变化。缓慢上提管柱，并观察管柱悬重变化，当悬重增加至2～3T，且没有液体返出时，根据配管位置及检测管柱数据表，进一步确定检测装置h的位置。3) Run in the detection string and position it: the string is pressed down for 2-3T, and after the seal of the positioning joint c is in place, the detection device h passes over the isolation sealer g, connects the circulation pipeline, circulates with a small displacement, and the pressure does not change. Lift the string slowly and observe the change of the suspended weight of the string. When the suspended weight increases to 2-3T and no liquid returns, further determine the position of the detection device h according to the piping position and the data sheet of the detection string.
4)正挤打压检测：注意观察立管压力变化，压力升高后小排量提高压力至10Mpa，并稳压10min，如果压力不降(或者压力降低小于5％)，可以判定隔离密封可靠。4) Positive squeeze and pressure detection: Pay attention to the pressure change of the standpipe. After the pressure rises, the small displacement increases the pressure to 10Mpa and stabilizes the pressure for 10 minutes. If the pressure does not drop (or the pressure drops less than 5%), it can be judged that the isolation seal is reliable.
5)继续上提管柱，使检测装置h位于上一个隔离密封内，重复步骤4)-5)。至此两层的隔离密封就检测完了，上提管柱即可。5) Continue to lift the string so that the detection device h is located in the previous isolation seal, and repeat steps 4)-5). At this point, the isolation and sealing of the two layers have been tested, and the string can be lifted up.
6)地面回放数据。读取检测装置h内流量计、压力计数据，进一步分析隔离密封性能，流量越大，说明密封受损越严重，进而可以判定隔离密封的完整性差；若检测压力增加，流量几乎无变化(几乎为零)，说明隔离密封完好，而整个管柱的某个局部有缺口。6) Playback data on the ground. Read the data of the flowmeter and pressure gauge in the detection device h, and further analyze the performance of the isolation seal. The greater the flow rate, the more serious the damage to the seal, and then it can be judged that the integrity of the isolation seal is poor; is zero), indicating that the isolation seal is intact, but there is a gap in a certain part of the entire string.
当井筒中隔离密封与套管之间形成偏心环形缝隙时，采用上述装置的上压力计测得油套环空和装置内环空的压差Δp，采用上述装置的流量计测得隔离密封的漏失流量q，利用如下公式可以计算隔离密封与套管间的偏心距e：When an eccentric annular gap is formed between the isolation seal and the casing in the wellbore, the pressure difference Δp between the oil casing annulus and the inner annulus of the device is measured by the upper pressure gauge of the above device, and the pressure difference Δp of the isolation seal is measured by the flow meter of the above device. Leakage flow q, use the following formula to calculate the eccentricity e between the isolation seal and the casing:
其中：in:
q：偏心环形缝隙流的流量，采用流量计测得，q: flow rate of eccentric annular gap flow, measured by flowmeter,
Δp：油套环空和装置内环空的压差，采用上流量计测得，Δp: The pressure difference between the oil jacket annulus and the inner annulus of the device, measured by the upper flowmeter,
μ：为井筒中流体的粘度μ: is the viscosity of the fluid in the wellbore
L：为隔离密封的长度，L: is the length of the isolation seal,
D＝R0+r0，h＝R0-r0，R0为套管半径，r0为隔离密封半径。D=R 0 +r 0 , h=R 0 −r 0 , R 0 is the casing radius, and r 0 is the isolation seal radius.
上述公式的推导原理：The derivation principle of the above formula:
请参见图8，井筒中隔离密封与井筒之间形成的缝隙为偏心环形缝隙，如图8所示，偏心距OO1＝e，取O1A＝R0，偏心环形缝隙O1A与x轴夹角为过O作OC//O1A，则间隙为：Please refer to Fig. 8. The gap formed between the isolation seal in the wellbore and the wellbore is an eccentric annular gap. As shown in Fig. 8, the eccentric distance OO 1 = e, take O 1 A = R 0 , the eccentric annular gap O 1 A and x The axis angle is Do OC//O 1 A through O, then the gap for:
再作OD使取微弧长基于N-S方程，在不计惯性力和质量力的条件下，假定液体为不可压缩的一维轴流对称条件，考虑压差作用，得到单位弧长上的流量为：Make OD again Take microarc length Based on the NS equation, under the condition of ignoring the inertia force and mass force, assuming that the liquid is incompressible one-dimensional axial flow symmetry condition, considering the pressure difference, the flow rate per unit arc length is obtained as:
其中，L为缝隙长度，μ为流体粘度，D＝R0+r0，微弧长的微流量为：Among them, L is the gap length, μ is the fluid viscosity, D=R 0 +r 0 , micro-arc length The microflow of is:
其中， in,
则偏心环形缝隙流的流量为：Then the flow rate of the eccentric annular gap flow is:
推导得：Deduced:
尽管上面结合附图对本发明的优选实施例进行了描述，但是本发明并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，并不是限制性的，本领域的普通技术人员在本发明的启示下，在不脱离本发明宗旨和权利要求所保护的范围的情况下，还可以做出很多形式，这些均属于本发明的保护范围之内。Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art Under the enlightenment of the present invention, people can also make many forms without departing from the purpose of the present invention and the scope of protection of the claims, and these all belong to the protection scope of the present invention.
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| CN102128026A (en) * | 2011-04-06 | 2011-07-20 | 北京六合伟业科技有限公司 | Formation pressure measuring device while drilling |
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| CN109931050A (en) * | 2019-05-08 | 2019-06-25 | 中国石油大学(华东) | It is a kind of flushing test alter with injection well downhole flow regulator test envelope integrated testing tool |
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