CN205858333U - A kind of three plug hydraulic fracturing detecting earth stress systems - Google Patents

A kind of three plug hydraulic fracturing detecting earth stress systems Download PDF

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Publication number
CN205858333U
CN205858333U CN201620443103.XU CN201620443103U CN205858333U CN 205858333 U CN205858333 U CN 205858333U CN 201620443103 U CN201620443103 U CN 201620443103U CN 205858333 U CN205858333 U CN 205858333U
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packer
main drilling
pressure
pipe
hydraulic fracturing
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CN201620443103.XU
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马鹏
何秀备
赵国平
吴春耕
张永永
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Zhejiang Huadong mapping and Engineering Safety Technology Co.,Ltd.
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Zhejiang East China Engineering Safety Technology Co Ltd
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Abstract

This utility model relates to a kind of three plug hydraulic fracturing detecting earth stress systems.The purpose of this utility model is to provide a kind of simple in construction, cost is relatively low, be applicable to three plug hydraulic fracturing detecting earth stress systems of high-stress state.The technical solution of the utility model is: a kind of three plug hydraulic fracturing detecting earth stress systems, there is test water supply installation and main drilling packer for pressure device, and be placed in boring build-in test section, two main drilling packers of lower layout, test water supply installation is through the water inlet of the upper main drilling packer of penstock connection, the outlet of upper main drilling packer connects lower main drilling packer through floral tube, main drilling packer supplies pressure device on flexible pipe is sequentially communicated, lower main drilling packer, it is characterized in that: in boring, upper main drilling packer be provided above time packer, this packer secondary packer confession pressure device outside soft pipe connection is holed.This utility model is applicable to the detecting earth stress under the rock mass engineering project supertension stress states such as water power, traffic, oil and mine.

Description

A kind of three plug hydraulic fracturing detecting earth stress systems
Technical field
This utility model relates to a kind of three plug hydraulic fracturing detecting earth stress systems.It is applicable to water power, traffic, oil With the detecting earth stress under the rock mass engineering project supertension stress states such as mine.
Background technology
Sichuan Jinping hydropower station diversion tunnel top covering rockmass buried depth 1500~2000m, maximum buried depth is about 2525m, Have that buried depth is big, feature that hole line length, footpath, hole are big, for super deep and long tunnels super-huge subsoil water electrical engineering.Maximally stress can Reaching more than 70MPa, during tunnel excavation, owing to there is the crustal stress of superelevation, locally rock mass occurs in that strong rock burst And deformation, bring the biggest difficulty and hidden danger to the design of tunnel, construction and safety.Conventional hydraulic fracturing detecting earth stress System mainly includes packer, penstock, hydraulic pump and test pipeline etc.) it is difficult to meet requirement.
Existing Hydraulic and Hydro-Power Engineering rock mass stress test procedure (DL-T5367-2007) and " water conservancy and hydropower rock test Code SL264-2001) in the method recommended have: Strain Method at the bottom of hole wall Strain Method, hole, aperture Strain Method, hydraulic fracturing and Surface strain method five clock.
In griotte rock mass under high-stress state, in the case of pie occurs in drilling core, use hydraulic fracturing It it is more effective rock mass stress method of testing.And the hydraulic fracturing ground rock mass stress test equipment of routine and the maximum of system Test pressure is 30~40MPa, it is clear that do not reach far away test request, need to develop the pressure new equipment more than 100MPa and System, and take corresponding method of testing.
Fig. 1 is conventional hydraulic fracturing ground rock mass stress test equipment and system, uses double inserting method, i.e. will by drilling rod Two expandable rubber packers are placed into selected fracturing section, and pressurization makes it expand, setting on hole wall, form pressure-bearing section Space.But when being affected by condition of high ground stress, in instrument connection drilling process, it may appear that aperture becomes big or deformation, when rock mass fracturing When pressure is more than 80MPa, owing to the external and internal pressure difference of upper packer is very big, upper packer top sebific duct can be caused to rupture, cause Test cannot proceed.
Summary of the invention
The technical problems to be solved in the utility model is: for the problem of above-mentioned existence, it is provided that a kind of simple in construction, cost Relatively low, be applicable to three plug hydraulic fracturing detecting earth stress systems of high-stress state.
This utility model be the technical scheme is that a kind of three plug hydraulic fracturing detecting earth stress systems, has Test water supply installation and main drilling packer are for pressure device, and are placed in two main drilling packers of upper and lower layout in boring, and test is supplied water Device connects lower main drilling packer through the water inlet of the upper main drilling packer of penstock connection, the outlet of upper main drilling packer through floral tube, Main drilling packer is sequentially communicated upper and lower main drilling packer through flexible pipe for pressure device, it is characterised in that: in boring, upper main drilling packer upper Side arranges time packer, this packer secondary packer confession pressure device outside soft pipe connection is holed.
In described packer, there is triple channel, lead to for pressure passageway, a main drilling packer voltage supply including one packer Road, and a central passage supplied water.
Described time packer has feed pipe, the confession pressure pipe being coaxially placed on outside feed pipe, and is coaxially placed on outside voltage supply pipe Rubber tube;
Wherein for leaving gap between pressure pipe and feed pipe, for the two ends end count seal envelope in gap between pressure pipe and feed pipe Close;
Leaving gap between described rubber tube and confession pressure pipe, rubber tube two ends are connected to through union joint and connecting tube the most successively Feed pipe two ends;
Be shaped with in the union joint of one end with for main voltage supply pipeline that between pressure pipe, feed pipe, gap connects and with rubber tube, For the secondary voltage supply pipeline of gap connection between pressure pipe, it is shaped with in the union joint of the other end and connects for gap between pressure pipe and feed pipe Logical main voltage supply pipeline.
The beneficial effects of the utility model are: this utility model, by being provided above time packer at upper main drilling packer, is kept away Exempt from the problem that upper main drilling packer causes upper packer to rupture because of external pressure difference, it is ensured that rock mass hydrofracturing under high-stress state Method detecting earth stress is successful.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art.
Fig. 2 is the structural representation of embodiment.
Fig. 3 is the structural representation of time packer in embodiment.
Fig. 4 is the A portion enlarged drawing of time packer.
Detailed description of the invention
As in figure 2 it is shown, the present embodiment is a kind of three plug hydraulic fracturing detecting earth stress systems, there is test water supply dress Put, main drilling packer supplies pressure device (high-pressure hydraulic pump/oil pump) for pressure device (high-pressure hydraulic pump/oil pump) and time packer, and is placed in The secondary packer 2 being from top to bottom sequentially arranged in boring and upper and lower two main drilling packers 1.The most secondary packer 2 seals for triple channel Every device, key component includes: rubber tube, dual pathways center-pole and dual pathways end ferrum head.
As it is shown on figure 3, time packer 2 includes feed pipe 201 in this example, the confession pressure pipe 202 being coaxially placed on outside feed pipe, with And the rubber tube 203 being coaxially placed on outside voltage supply pipe.Wherein for leaving gap, for pressure pipe and confession between pressure pipe 201 and feed pipe 202 Between water pipe, the two ends end count seal 204 in gap is closed.Supply the two ends of pressure pipe 201 through external screw thread threaded water supply connecting tube 203, the cooperation of this water supply connecting tube compresses sealing ring 204 for pressure pipe 201.In the present embodiment, rubber tube 203 two ends are individually fixed in On union joint 205, this union joint is threadeded with the connecting tube 206 of homonymy, between leaving between rubber tube 203 and confession pressure pipe Gap.
The present embodiment is shaped with in the union joint 205 of rubber tube 203 one end and connects with for gap between pressure pipe and feed pipe Main voltage supply pipeline 2051, and with rubber tube and the secondary voltage supply pipeline 2052 that connects for gap between pressure pipe;Rubber tube 203 is another The main voltage supply pipeline 2051 connected with for gap between pressure pipe and feed pipe it is shaped with in the union joint 205 of one end.
Having the central passage of water supply in this example in feed pipe 201, to test section voltage supply, designing the highest test pressure is 100MPa;Main voltage supply pipeline 2051 coordinates between pressure pipe and feed pipe, gap formation main drilling packer is for pressure passageway, to lower section The voltage supply of two main drilling packers 1, designing the highest test pressure is 100MPa;Secondary voltage supply pipeline 2052 compound rubber cylinder and for pressure pipe it Between gap form time packer for pressure passageway, to self packer voltage supply, designing the highest test pressure is 40MPa.
The present embodiment is tested water supply installation and connects main drilling packer 1 through the central passage of penstock 3 with time packer 2 Water inlet, the outlet of upper main drilling packer 1 connects lower main drilling packer 1 through floral tube 5;Main drilling packer supplies pressure device through flexible pipe 4 He It is the main drilling packer 1 upper and lower main drilling packer of voltage supply channel connection 1 in secondary packer 2;Secondary packer connects through flexible pipe 4 for pressure device Secondary packer 2.
The operation principle of the present embodiment is as follows: the present embodiment is further added by one in the upper end of double plug packers can provide independent The secondary packer of pressure, it may be assumed that a triple channel packer in parallel in original pair of plug packer (two main drilling packers 1) system (secondary packer 2), constitutes three plug packer systems.
In this example during hydraulic fracturing detecting earth stress, connection is had test steel pipe and inflatable three envelopes of high-pressure oil pipe After arriving predetermined hole depth position under device, pressurize to primary and secondary packer respectively so that the rubber tube of three packers of primary and secondary is continuous Expand and be also in close contact with hole wall rock mass, when in packer, pressure reaches predetermined packing pressure (pressure of secondary packer 2 is pre- Estimate the half of the highest test pressure), then stop pressurization;Start detecting earth stress.In test process, the pressure of main drilling packer 1 will Improve along with the increase of test section pressure, and the pressure increasing degree of secondary packer 2 is less.

Claims (3)

1. a three plug hydraulic fracturing detecting earth stress system, has test water supply installation and main drilling packer for pressure device, And it being placed in two main drilling packers (1) of boring build-in test position upper and lower layout, test water supply installation is through penstock (3) even The water inlet of logical upper main drilling packer, the outlet of upper main drilling packer connects lower main drilling packer through floral tube (5), and main drilling packer is for press-fiting Put and be sequentially communicated upper and lower main drilling packer through flexible pipe (4), it is characterised in that: in boring, upper main drilling packer be provided above time packing Device (2), this packer connects the secondary packer outside holing for pressure device through flexible pipe (4).
Three plug hydraulic fracturing detecting earth stress systems the most according to claim 1, it is characterised in that: described packing Device has triple channel in (2), and including one packer for pressure passageway, a main drilling packer is for pressure passageway, and a water supply Central passage.
Three plug hydraulic fracturing detecting earth stress systems the most according to claim 2, it is characterised in that: described packing Device (2) has feed pipe (201), the confession pressure pipe (202) being coaxially placed on outside feed pipe, and is coaxially placed on the rubber outside voltage supply pipe Cylinder (203);
Wherein for leaving gap, for two ends end count seal (204) in gap between pressure pipe and feed pipe between pressure pipe and feed pipe Close;
Leaving gap between described rubber tube (203) and confession pressure pipe, rubber tube (203) two ends are respectively successively through union joint (205) It is connected to feed pipe (201) two ends with connecting tube (206);
Be shaped with in the union joint (205) of one end with for main voltage supply pipeline (2051) that between pressure pipe, feed pipe, gap connects and with Rubber tube, the secondary voltage supply pipeline (2052) connected for gap between pressure pipe, be shaped with in the union joint (205) of the other end and supply pressure pipe And the main voltage supply pipeline (2051) of gap connection between feed pipe.
CN201620443103.XU 2016-05-13 2016-05-13 A kind of three plug hydraulic fracturing detecting earth stress systems Active CN205858333U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105804735A (en) * 2016-05-13 2016-07-27 浙江华东工程安全技术有限公司 Three-plunger type hydraulic fracturing ground stress measurement system
CN106907146A (en) * 2017-04-19 2017-06-30 中国电建集团中南勘测设计研究院有限公司 One kind control valve and hydrofracturing geodetic stress test device
CN108049847A (en) * 2017-12-14 2018-05-18 中国地质调查局水文地质环境地质调查中心 A kind of twin packer layering water plug and method
CN108999586A (en) * 2018-08-10 2018-12-14 中国地震局地壳应力研究所 Minor diameter rock mass hydrofracturing tests straddle packer
CN111677497A (en) * 2020-06-28 2020-09-18 中国地质科学院地质力学研究所 Hydrofracturing stress detection device and detecting system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105804735A (en) * 2016-05-13 2016-07-27 浙江华东工程安全技术有限公司 Three-plunger type hydraulic fracturing ground stress measurement system
CN106907146A (en) * 2017-04-19 2017-06-30 中国电建集团中南勘测设计研究院有限公司 One kind control valve and hydrofracturing geodetic stress test device
CN106907146B (en) * 2017-04-19 2023-04-07 中国电建集团中南勘测设计研究院有限公司 Control valve and hydrofracturing geodesic stress test device
CN108049847A (en) * 2017-12-14 2018-05-18 中国地质调查局水文地质环境地质调查中心 A kind of twin packer layering water plug and method
CN108999586A (en) * 2018-08-10 2018-12-14 中国地震局地壳应力研究所 Minor diameter rock mass hydrofracturing tests straddle packer
CN111677497A (en) * 2020-06-28 2020-09-18 中国地质科学院地质力学研究所 Hydrofracturing stress detection device and detecting system

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Effective date of registration: 20210712

Address after: Room 609 and 610, North building, Huadong Hospital, 22 Chaowang Road, Hangzhou, Zhejiang 310014

Patentee after: Zhejiang Huadong mapping and Engineering Safety Technology Co.,Ltd.

Address before: 1-2 / F, building 5, 355 Tianmu Shanxi Road, Xianlin street, Hangzhou City, Zhejiang Province

Patentee before: ZHEJIANG HUADONG ENGINEERING SAFETY TECHNOLOGY Co.,Ltd.