CN2349348Y

CN2349348Y - Instrument for surveying leak off rate and thief zone

Info

Publication number: CN2349348Y
Application number: CN98235961U
Authority: CN
Inventors: 夏宏南; 楼一珊
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-06-18
Filing date: 1998-06-18
Publication date: 1999-11-17
Anticipated expiration: 2008-06-18

Abstract

The utility model relates to an instrument for surveying leakage rates and leakage positions. A collecting pipe on the upper half part and a protecting outer cylinder at the lower half part of the instrument compose a whole body; a flow sensor and a pressure sensor are arranged in the collecting pipe; a heat insulating cylinder and a temperature sensor are arranged in the protecting outer cylinder; a data memory and a battery cylinder are arranged in the heat insulating cylinder; the three sensors and the data memory are respectively connected with the battery cylinder and are supplied with power supply by the battery cylinder. When the utility model is arranged at the lower end of a drilling column into a pit bottom, the three sensors simultaneously measure the flow rate, the pressure and the temperature of slurry, and then users can accurately judge the leakage rate and the leakage position of circulation loss.

Description

Leakage leak-off velocity and loss horizon measuring instrument

The utility model relates to well logging apparatus, particularly relates to the device that detects leakage leak-off velocity and leak position.

The instrument of the detection leakage position of oil drilling industry employing at present, roughly system is divided into two big classes.One class is the physical prospecting tester, such as temperature logging tool, electrical log instrument, radioactive tracer measuring instrument, acoustic measurement instrument.Another kind of is special test equipment; As flow meter, pressure-measuring device.Above-mentioned various instruments can only detect single index, need well logging company cooperate service during detection, the detecting instrument that will link to each other with cable is rendered to and is bored in the good oil well earlier, and pour into a large amount of mud, along with winch twist cable constantly, detecting instrument promotes in oil well, the signal that detects is reached ground by cable after, ask according to these data again and calculate the speed that mud misses and the position of leakage in well.The cable amount of this detector big (more profound than oil well) need drop into great amount of manpower and material resources, financial resources, time during detection, and cost is high and waste is big.Especially away from desert region, the ocean in base, testing cost is more expensive.Because above-mentioned instrument can only detect an index, asking the speed and the position of missing in the well of measuring according to this index often is not very accurately.

No. 97111751.9 measuring position of mud loss methods and device thereof by Petroleum Univ. application, it provides a kind of instrument that can accurately measure the leakage position under different drilling conditions rapidly, this instrument comprises tracer, flow meter, measuring position of mud loss instrument, tracer probe, microcomputer and printer.This instrument is owing to tracer, instrument expense height; If irregular well (in the actual well drilled operation, this situation often occurring) is arranged, the precision of measurement is influential, is difficult to judge very accurately the position of drop ply.

The purpose of this utility model is to provide a kind of can accurately measure leakage leak-off velocity and loss horizon measuring instrument rapidly in drilling process.

The technical solution of the utility model is as follows:

The utility model is divided into two parts, and its first half is a header, and Lower Half is the protection urceolus; Header and protection urceolus constitute an integral body; Flow transmitter is housed in the header, and pressure sensor is equipped with in the bottom of header, the through hole that laterally has two correspondences at least of the upper and lower of header; The protection urceolus is a hollow tube; its upper and lower end respectively has a plug; protection urceolus lower end is connected with temperature pick up and guiding damping head; heat insulation tube is housed in the protection urceolus; its flow transmitter; data storage in pressure sensor and temperature pick up and the heat tube links to each other with the battery tube respectively, and its battery tube provides power supply for three sensors and data storage.The utility model is connected the lower end of drill string, removes in the process at drill string, the pressure of continuous measurement mud column periodically, temperature and flow stream velocity, the outcome record of measurement is in data storage.After the trip-out, adopt computer that the data (result) that store are accessed processing, comprehensively ask speed and the rule of calculating leakage, comprehensively judge loss horizon with the variation of temperature and data on flows with pressure and data on flows.

Advantage of the present utility model has been to simplify the measurement of lost-circulation zone, in the drill-well operation process, can detect the parameter that leak-off velocity and leak position and lost-circulation zone hydrodynamics research institute need simultaneously, it has adopted downhole data stored record mode, the service that has saved winch and well logging company, use by drilling crew's direct control, save great amount of manpower and material resources, financial resources and detection time, be specially adapted to the drilling team's application away from the base such as desert region, ocean.And can detect many index, can rapidly, accurately judge the position of leakage leak-off velocity and leakage.

Embodiment in conjunction with the accompanying drawings is further described the utility model:

Fig. 1: the utility model structural representation.

Among Fig. 1: a restrictor ring (7) laterally is equipped with at the outer middle part of header (6); flow transmitter (1) in the header (6) is contained on the restrictor ring (7); plug (8; 10) be contained in top and the bottom of protecting urceolus (9) inner chamber respectively; header (6) is connected in aggregates with protection urceolus (9); pressure sensor (2) is in the lower end of header (6) and on plug (8); the through hole that laterally has two correspondences at least of header (6); heat insulation tube (13) is housed in the protection urceolus (9); in the heat insulation tube (13) data storage (3) is arranged; battery tube (4), the plug (10) in the protection urceolus (9) is connected with temperature pick up.Temperature pick up (5), flow transmitter (1), data storage (3), pressure sensor (2) links to each other with battery tube (4) respectively, power supply is provided for above-mentioned three sensors and data storage (3) by battery tube (4).In the outside of temperature pick up (5) a temperature sensor protecting pipe nipple (11) is arranged, guiding damping head (12) is connected on the temperature sensor protecting pipe nipple (11).

During work, be deep into the shaft bottom after the utility model being connected the lower end of drill string, under the condition of continuously even mud grouting, enter into the sensor (1) of flowing through in the header (6) in the through hole of mud by two correspondences in header (6) top, and the lower surface forms a pressure reduction thereon, the output quantity of electric capacity or voltage is changed: the speed of liquid stream relative discharge sensor (6) is big more, and pressure reduction makes signal of telecommunication output valve big more.When the utility model is positioned at the drop ply top, what flow transmitter (6) write down is flow stream velocity of the present utility model relatively, it is flow velocity (leak-off velocity) sum that lifting velocity and liquid flow the relative borehole wall when hoisting, and the flow stream velocity that stops to hoist is leak-off velocity; If meet lost-circulation zone, flow stream velocity can increase.Utilize flow transmitter (1) survey data to obtain the corresponding relation curve of flow stream velocity and well depth, can judge the position that leakage takes place.

Its pressure sensor (2) and flow transmitter (1) synchro measure, write down the pressure of fluid column at that time, try to achieve dynamic liquid level height at that time, the curve that liquid level descends in time, and try to achieve the corresponding relation curve of transient liquid leak-off velocity and mud column pressure in conjunction with flow transmitter (1).

Its temperature pick up (5) and flow transmitter (1), pressure sensor (2) synchro measure.If meet lost-circulation zone, utilize the temperature of its lost-circulation zone mud different, and can accurately judge the lost-circulation zone position in conjunction with flow transmitter (1) survey data with the following temperature of lost-circulation zone.

Claims

1. leakage leak-off velocity and loss horizon measuring instrument, it is characterized in that: the protection urceolus (9) of header of the first half (6) and Lower Half constitutes an integral body; Flow transmitter (1) is housed in the header (6), and pressure sensor (2) is equipped with in the bottom of header (6), the through hole that laterally has two correspondences at least of the upper and lower of header (6); Protection urceolus (9) respectively has a plug (8,10) for upper and lower end; the lower end is connected with the hollow tube of temperature pick up (5) and guiding damping head (12); heat insulation tube (13) is housed in the protection urceolus (9), and three sensors (1,2,5) link to each other with battery tube (4) with the interior data storage (3) of heat insulation tube (13).