CN87205997U

CN87205997U - Dilatometer

Info

Publication number: CN87205997U
Application number: CN 87205997
Authority: CN
Inventors: 郭宝利
Original assignee: WELL DRILLING INST NORTH CHINA PETROLEUM ADMINISTRATIVE OFFICE
Current assignee: WELL DRILLING INST NORTH CHINA PETROLEUM ADMINISTRATIVE OFFICE
Priority date: 1987-04-06
Filing date: 1987-04-06
Publication date: 1988-03-23

Abstract

The utility model relates to an instrument for measuring the expansion changing rate. The complete set instrument is composed of a simple core preparing device, a measuring barrel, a conducting bar, a digital-analog converting circuit, a digital meter and a recorder. The utility model mainly used for the field of drilling engineering measures and evaluates the expansibility of clay shale, and the performance of treated agents and drilling fluid for depressing the strata expansion, well selects the kinds and the proportioning concentration of the treated agents suitable for being used on site, and carries out the classifying research of the clay shale. The instrument uses numbers to display the measuring result at any moment, and automatically describes the measuring curve of the expansion quantity which changes following time. The utility model provides a measuring instrument for the experimental research.

Description

Dilatometer

The utility model is a kind of instrument of measuring the expansion rate of change, be mainly used in the petroleum drilling engineering field, the hydration swelling performance of test evaluation mud shale, test evaluation mud conditioner or drilling fluid suppress the hydration swelling performance, carry out the sort research of mud shale etc.

The hydration swelling of mud shale is the major reason that forms drilling failures such as bit freezing, slump in, therefore understands the hydration swelling of mud shale quantitatively, selects effective inhibition treating agent, and is most important to the prevention down-hole accident.Measure the swelling property of mud shale in the past, adopt the method that hangs clock gauge, its precision and range of application far can not satisfy the requirement of above-mentioned test event in the drilling engineering, also do not have the instrument that is suitable at present.

The utility model has designed the complete cover testing tool of a cover for addressing the above problem, the hydration swelling performance that can be used for the test evaluation mud shale, test evaluation mud conditioner or drilling fluid suppress stratum aquation swelling property, the kind of preferred process agent and selection adapt to the treating agent matched proportion density of rig-site utilization, and carry out the mud shale sort research.This instrument can show test results with numeral at any time, and depicts the time dependent test curve of test overall process swell increment automatically.

The utility model also can be applicable to departments such as geology, coal, agricultural, the expansivity of test rock, soil.

Technical characterictic of the present utility model is:

1, on sample core pressure setting (Fig. 2), makes sample core (3), sample core (3) is packed in the survey tube (7) that has end cap (1), surveying tube (7) installs on parallel rod (8), (9), conductive bar (6) is inserted and is surveyed tube (7), and link to each other with sensing transducer (10), the output signal of sensing transducer (10), through number---analog conversion circuit (13), by display (14) indication measurement result, describe test curve by registering instrument (12) simultaneously.

2, surveying tube (a 7) internal diameter is 20-80mm, highly be 40-100mm, the hole, the uniform garden of end face of end cap (1), and the aperture is 0.5-3mm, and quantity is 10-100, and end cap (1) and survey tin (7) are with being threaded.

3, porous garden dish (5) is arranged at hollow conductive bar (6) bottom, and its diameter is 20-80mm, dish hole, (5) uniform garden, garden, and the aperture is 0.5-5mm, quantity is 10-100, with the uniform infiltration of warranty test solution, guarantees the conduction precision of offset variable again.

4, survey tube (7) and be contained on connecting rod (8), (9), make test macro relatively independent, to guarantee measuring accuracy.

5, displacement sensing transmitter (10) is connected with conductive bar (6), and its output signal through number---analog conversion circuit (13), shows measurement data by digital watch (14), describes test curve by self-balancing recorder (12) simultaneously.

6, for guaranteeing the unitarity of measuring accuracy and test data, this tester is furnished with sample core pressure setting (Fig. 2).It is made up of mould tube (21), pressure frame (27), oil cylinder (25) and oil pump (26).

7, the mould tube (21) of sample core pressure setting, internal diameter is 20-80mm, height 100-200mm, its internal diameter is identical with survey tube (7) internal diameter.

8, in sample core pressing process, filtrate oozing out arranged, the filter body (17) that a band center pit is arranged in the sample core pressure setting, with its pack into lower end of mould tube (21), and it is fastening by top plug (16), setting-in 100-320 purpose stainless steel cloth (18) above the filter body (17) is to guarantee the filtrate path.

9, pressured column stopper rod (24), diameter is 20-80mm, height 100-200mm installs O-ring seal (23) in its annular groove (22), to guarantee pressurization and guiding.

Fig. 1 is an expansion tester synoptic diagram.

Fig. 2 is an expansion tester sample core pressure setting synoptic diagram.

Be described further below in conjunction with accompanying drawing:

In the synoptic diagram shown in Figure 1, in end cap (1), put into filter paper (2), be screwed into and survey on the tube (7), sample core (3) is put into and is surveyed tube (7), to survey tube (7) and be installed on parallel rod (8), (9) on, the conductive bar (6) of band garden dish (5) is inserted survey tube (7), the upper end links to each other with sensing transducer (10), sensing transducer (10) is fixed on the crossbeam (11), the output line of displacement sensing transmitter (10) is connected to number---and analog conversion circuit (13), number---analog conversion circuit (13) links to each other with self-balancing recorder (12) with digital wash (14).Except that self-balancing recorder (12), all the other are installed in the tool housing (16).

In the compacting sample core apparatus shown in Figure 2, O-ring seal (20) is put into the end face annular groove of mould tube (21), puts into filter paper (19) again, puts into the filter body (17) that is embedded with filter screen (18), is tightened on the mould tube (21) with top plug (16).With sample core material (3) the mould tube (21) of packing into, be inserted in the stopper rod (24) that O-ring seal (23) are housed on the annular groove (22), mould tube integral body is placed on the pressure frame (27), drive oil cylinder (25) to plunger (24) pressurization by oil pump (26), container (28) is used for collection and oozes out filtrate.

Specific implementation process:

As shown in Figure 2, in mould tube (21), the O-ring seal (20) of packing into is earlier put into filter paper (19) again, and the filter body (17) of filter screen (18) of having put into setting-in is tightened on the mould tube (21) with top plug (16) then.The quantitative sample core material (3) of packing into, be inserted in the stopper rod (24) that O-ring seal (23) are housed on the annular groove (22), above-mentioned integral body is placed on the pressure frame (27), by oil pump (26), driving oil cylinder (25), apply the pressure of testing requirements, collect filtrate by container (28), keep the regular hour, can prepare sample core (3).As make mud shale sample core, when mould tube internal diameter 25mm, apply 40Kg/cm ²Pressure is kept 5 fens clock times, can obtain sample core preferably, after sample core (3) compression moulding according to condition, screw off top plug (16), take out filter body (17) and filter paper (19), to survey tube (7) and be screwed on the mould tube (21), add described pressurization, and sample core (3) can be pressed into and survey tube (7).

Shown in Figure 1, the survey tube (7) with dress sample core snaps fitted on parallel rod (8), (9), inserts the conductive bar (6) of band garden dish (5), and the upper end is connected with displacement sensing transmitter (10).With displacement sensing transmitter (10), number--analog conversion circuit (13), digital wash (14) and self-balancing recorder (12).Be communicated with on request.Injection test solution (4) in surveying tube (7), sample core (3) are under solution (4) soaking state, and by characteristic decision separately, sample core (3) can expand or drawdown deformation, and its deflection constantly changes in time.The deflection size in arbitrary moment, footpath conductive bar (6) is responded to and is transmitted to displacement sensing transmitter (10).Again through number---analog conversion circuit (8) is converted to digital quantity with analog quantity.At any time shown by digital wash (14), self-balancing recorder (12) is depicted the time dependent law curve of deflection in the entire test simultaneously.According to test result, got final product the inhibition hydration swelling performance of the hydration swelling and the solution of desampling core, the performance of sample core or solution is made analysis and judgement, and with this to mud conditioner, drilling fluid, mud shale carries out correct evaluation, selection or classification.

Claims

1, a kind of expansion tester, it is characterized in that having at least one Cylinder and survey tube (7) and end cap (1), survey in the tube (7) conductive bar (6) is housed, conductive bar (6) links to each other with displacement sensing transmitter (10), surveys tube (7) and is installed on parallel rod (8) and (9).

2, expansion tester according to claim 1 is characterized in that the internal diameter of survey tube (7) is 20-80mm, highly is 40-100mm, the hole, the uniform garden of end face of end cap (1), the aperture is 0.5-3mm, and quantity is 10-100, and end cap (1) is threaded with survey tube (7).

3, expansion tester according to claim 1 is characterized in that conductive bar (6) is a hollow-core construction, and it has porous garden dish (5) bottom, and garden dish (5) diameter is 20-80mm, above hole, uniform garden, the aperture is 0.5-5mm, quantity is 10-100.

4, expansion tester according to claim 1, is contained on the crossbeam (11) at it is characterized in that having connecting rod (8), (9).

5, expansion tester according to claim 1, the sensitivity that it is characterized in that displacement sensing transmitter (10) is 200-300mv/mm.

6, the sample core pressure setting of the described expansion tester of claim 1 is characterized in that: it is made up of mould tube (21), pressure frame (27), oil cylinder (25) and oil pump (26).Oil cylinder is fixed on pressure frame top, and oil pump is connected with oil cylinder by pressure pipe.

7, sample core pressure setting according to claim 6 is characterized in that mould tube (21) work internal diameter is 20-80mm, highly is 100-200mm.

8, device according to claim 6 is characterized in that having a filter body (17) of being with center pit, an end face setting-in stainless steel wire filter screen of filter body, and sieve mesh is the 100-320 order.

9, device according to claim 6 is characterized in that having a plunger rod with at least one annular groove (22) (24), and O-ring seal (23) is housed on the annular groove (22), and plunger rod (24) diameter is 20-80mm, and length is 100-200mm.