CN1352389A - Analyser for oil and gas components of mud - Google Patents

Abstract

A mud oil and gas component analyzer adopts multifunction of mixed sampling of carrier gas and tested sample evaporating gas. It consists of gas inlet pipe, mud tank, heating rod, cylinder rod, gas outlet pipe, multiport valve, dosing pipe, column box, capillary column, detector, release solenoid valves, shunt valve and support. It has high detecting accuracy, is safe, convenient and has little, sample loss. It may be used widely in the oil field mud analysis and detection.

Description

Analyser for oil and gas components of mud

Technical field the invention belongs to a kind of analyser for oil and gas components of mud device.

Background technology is present, and oil field analysis to measure mud sample adopts the thermovacuum sampling more, uses the method for gas chromatographic analysis then.This method is owing to be thermovacuum sampling, so hidden danger is arranged during operation, also the sample loss phenomenon can take place.

Summary of the invention the present invention adopts the method for carrier gas and sample boil-off gas mixed sampling when the analysis to measure mud sample, sampling degree of safety height, and sample loss is little.

Its principle of work is as follows:

Multiport valve 8 has two kinds of duties, and first kind of state is the sampling duty, 1., 2. connect, and 3., 4. connection, 5., 6. connection; Second kind of state is the analytical work state, 2., 3. connect, 4., 5. connect, 6., 1. connection.Carrier gas 1 connects the 1. point of multiport valve 8, the 2. point of draft tube 2 one termination multiport valves 8, and a termination support 16, mud tank 3 bottoms are connected with cylinder rod 6, can slide up and down.When cylinder rod 6 was released, mud tank 3 was connected with draft tube 2, escape pipe 7, and when cylinder rod 6 retracted, mud tank 3 disconnected with draft tube 2, escape pipe 7.Heating rod 5 is placed in the mud tank 3.3. the point of escape pipe 7 one termination supports 16, a termination multiport valve 8.On escape pipe 7, connect diverting valve 15.

When the sampling duty, cylinder rod 6 is released mud tank 3, and mud tank 3 and draft tube 2, escape pipe 7 are connected.Mud sample 4 sample gas that 5 heating produce through heating rods with by multiport valve 8 1., 2. and the carrier gas that enters of draft tube 2 mix.Along with entering of carrier gas, mixture pressure constantly increases, and by escape pipe 7,3., 4. enters quantity tube 9 by multiport valve 8.At this moment, emptying solenoid valve 13 and 14 emptying.The gas that comes out from quantity tube 9 is leaded up to 13 emptying of emptying solenoid valve, another road flow through multiport valve 8 6., 5. point, by 14 emptying of emptying solenoid valve, do not allow tested gas enter post case 10.Diverting valve 15 is a kind of protective devices, and when gaseous tension was excessive in mud tank 3, releasing pressure automatically was regulated pressure, the safety of levying equipment with the guarantor.

When the analytical work state, cylinder rod 6 retracts mud tank 3, and mud tank 3 and draft tube 2, escape pipe 7 are disconnected.Carrier gas 1 is swept along by the mixed gas sample to be measured in the quantity tube 9 of 1., 6. naming a person for a particular job of multiport valve 8, again by multiport valve 8 4., 5. put capillary column 11 in the displacement pile case 10, after sample is analyzed, send into detecting device 12 and detect.At this moment, emptying solenoid valve 13,14 cuts out.

The present invention can be widely used in each php slurry check and analysis, has advantages such as accuracy of detection height, safety, convenience, the difficult loss of sample.

Description of drawings Fig. 1 is the analyser for oil and gas components of mud synoptic diagram

Among the figure: the 1st, carrier gas, the 2nd, draft tube, the 3rd, mud tank, the 4th, mud sample, the 5th, heating rod, the 6th, cylinder rod, the 7th, escape pipe, the 8th, multiport valve, the 9th, quantity tube, the 10th, post case, the 11st, capillary column, the 12nd, detecting device, the 13rd, emptying solenoid valve, the 14th, emptying solenoid valve, the 15th, diverting valve, the 16th, support.

Embodiment

Carrier gas 1: nitrogen;

Draft tube 2, escape pipe 7: φ 2 white steel pipes;

The volume of mud tank 3: 600ml;

The power of heating rod 5: 70W; Cylinder model: QGX25 * 85; The model of diverting valve 15: BY-1.Experimental data: sample: the mud of Liaohe Oil Field well; Analysis time: October 8 calendar year 2001; Analysis times: 3 times (repeatability is analyzed).

Sequence number	The component title	Peak area			Mean value	Deviation	1	Deviation 2	Deviation 3
										Sample 1	Sample 2	Sample 3
		??1	??nC1	??50									??59	??54	??54.33	??7.98％	??8.59％	??0.61％
??2	??nC2				??85	??88	??92	??88.33	??3.77％	??0.38％	??4.15％
		??3	??nC3	??106								??110	??95	??103.67	??2.25％	??6.11％	??8.36％
??4	??nC3				??264	??258	??271	??264.33	??0.13％	??2.40％	??2.52％
		??5	??nC4	??70								??78	??65	??71.00	??1.41％	??9.86％	??8.45％

The analysis result deviation is very little as can be seen from the table, meets the requirement of relevant criterion fully.

Claims (1)

1, a kind of analyser for oil and gas components of mud, multiport valve 8 is arranged, quantity tube 9, post case 10, capillary column 11, detecting device 12, emptying solenoid valve 13,14, it is characterized in that: also have draft tube 2, mud tank 3, heating rod 5, cylinder rod 6, escape pipe 7, diverting valve 15, support 16,2. the point of draft tube 2 one termination multiport valves 8, one termination support 16, mud tank 3 bottoms are connected with cylinder rod 6, can slide up and down, when cylinder rod 6 is released, mud tank 3 and draft tube 2, escape pipe 7 is connected, when cylinder rod 6 retracts, mud tank 3 and draft tube 2, escape pipe 7 disconnects, and heating rod 5 is placed in the mud tank 3, escape pipe 7 one termination supports 16,3. the point of one termination multiport valve 8 connects diverting valve 15 on escape pipe 7.

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