CN2210249Y - Automatic vacuum distillation gas remover for well drilling liquid - Google Patents

Abstract

The utility model discloses an automatic vacuum distillation gas remover for full tolerance well drilling liquid for an exploration mud logging in an oil gas field, which is composed of a diversion part, a tank part, a measurement part and a salt water supply part. The diversion part is composed of drainage tubes provided with arcuate baffles and vertically arranged on the lower part of the arcuate baffles, in the tank, an electric heating tube and an ultrasonic wave transducer are arranged, and the side upper part of the tank, the bottom of the tank, the upper part of the other side of the tank body and the top part of the tank are respectively provided with a piston type two-digit two-way valve. The utility model has advantages that the utility model overcomes the basic serious distortion of the mud logging, and the utility model has simple structure, without original well drilling devices moved, the utility model creates conditions for the on-scene, early and quick identification and evaluation of an oil gas layer in order to realize the complete deaeration, direct measurement and automation of the mud logging.

Description

Automatic vacuum distillation gas remover for well drilling liquid

The utility model belongs to degassing field, is to be particularly related to the full tolerance drilling fluid drainage automatic vacuum mud still device that is applied in the oil and gas exploration mud logging the drilling fluid degassing, or is used for some liquid sample degassing.

Prior art

(1) French heat production VMS degasser (see figure 1)

China introduces French thermal vacuum mud distillation degasser (VMS) in the mud logging work of oil and gas exploration (mud outgases in order to identification entirely and estimates oil-gas Layer, twenties years so far, still serves in oil-gas exploration at present to drilling fluid.

Theoretically, the VMS degassing is analyzed two of modern mud logging interpretation work is required greatly (to make the mud logging data carry out scene, early stage, quick identification and evaluation to oil-gas Layer; Can carry out interlayer, contrast between well) special significance arranged, show and offer the necessary following important parameter of geologic interpretation: gas component, the continuous degassing device is proofreaied and correct drilling fluid (mud) gas saturation, ground air content (SPI) formation gas bearing amount (CGS).But, China decades facts have proved that there is following major issue in VMS, the solution of these problems will be given VMS with new vitality, and with the new instrument service of emerging.

The analysis of VMS subject matter is summarized as follows:

1. the serious distortion of the drilling fluid of Cai Jiing (mud) sample:

At present, outlet mud sample is generally gathered at drilling fluid (mud) delivery channel mouth (mud repeatedly fall into mud ditch before), and when taking the drilling fluid (mud) that returns on formation gas and the landwaste before this and flowing to the well head liquid level, a large amount of free natural gases escape in the air, still have natural gas to overflow then in the mud delivery channel process of flowing through.Experiment showed, that the above-mentioned natural gas that escapes in the atmosphere accounts for about 50% of the middle all natural gas of drilling fluid (mud), has caused the basic serious distortion (consulting hereinafter) of the mud sample of adopting.

2. drilling fluid (mud) sample amount of gas evolved distortion:

Not only exist as above-mentioned basic serious distortion, and because VMS structure design shortcoming has caused the amount of gas evolved distortion of adopting the mud sample owing to sampling formation.

A, deviate from gas and capture incomplete

The gas volume that gauge line (G5) is collected only is a part of deviating from gas, and the gas abandoned of valve A and valve B this (managing in space, the vacuum meter on pipeline, the P2 mud liquid level) (may account for gas nearly 1/2).

B, entrained air:

Pipe H, the air of valve A through hole inner volume is sneaked into the gas sample in operating process; Air in the pipe U is all sneaked into the gas sample.

It is little bigger than normal that the gas volume is talked number in c, the gauge line:

The stabilizing solution of P4 and G5(gauge line behind (water inlet) gas collection) in stable liquid level not on same horizontal plane, gas is in relative negative pressure state in the G5 thereby make, so the gas volume reading of G5 is little bigger than normal.

D, sneak into steam:

Salt solution few (only 2-3cm height) in the G6 is difficult to absorb a large amount of steam, makes steam enter G6 and G5.

C, sampling back be to the standing time between the degassing, the mistake of escaping to some extent of the natural gas in the mud.

3. the gas component of mud sample, concentration distortion:

A, a large amount of free gas (light component is main) escape into atmosphere.

G5(even G6 under b, the normal temperature condition) the absorption heavy hydrocarbon.

Entrained air in c, the degasification process.

4. the VMS degassing, analysis result vary with each individual:

The degassing, the analysis result artifical influence factor is too many, from the process hand-manipulated of getting mud sample time, position, place, mode, the grasp of instrument sealing, forvacuum, syringe sampling, sample introduction etc., makes analysis result vary with each individual.Different people, perhaps same people repeats the degassing and analyzes same mud sample (or liquid sample), and its result differs big and makes us surprised and dare not use.In addition and since can not with survey synchronized sampling with boring continuous gas, the gas measured value that also is difficult to the continuous degassing device is deviate from gas is proofreaied and correct.

5. inefficiency outgases:

A mud sample finishes from preparation to the degassing and needs about 40 minutes, and incompatibility mud logging interpretation work is about the needs of " scene, quick identification and evaluation oil-gas Layer ".

6. survey the mud sample difficulty that unusual high point (or near unusual high point) locates and get with boring gas, and this data main target of capturing of gas survey work just, because the identification and evaluation of oil-gas Layer is just had typicalness, authenticity according to unusual high some achievement.

7. bottle P2 only is heated the bottom, and the efficiency of heating surface is low; When making sample continuously, scald one's hand when taking off the bottle P2 that has taken off gas.

8. glassware is frangible, a little less than the bar magnet mixing power, easily stops, and easily forgets to insert in the bottle.

(2) " continuous and quantitative is analyzed the new system of gas concentration in the drilling fluid in the drilling well "

Britain Si Lunbeixie subordinate's analysis drilling company is through simulated experiment and field experiment, proved and returned on the drilling fluid to ground to flowing in the drilling fluid tank process, the natural gas about 50% in the mud has been spilt in the air more than the drilling fluid interface, but their " new system " adopted the way of gathering free gas and sampling and carry out continuous degassing from " capturing end " mistakenly drilling fluid tank, and the wrong data with the two analysis result sum regard that " quantitatively " reflected " the real gas concentration in the following drilling fluid of bell guiding pipe nipple " as.Concluding its problem has:

1. the gas that " captures end " is gaseous mixture, and it does not reflect the natural gas and the concentration thereof of overflowing in real time from drilling fluid.

2. ignored drilling liquid flow through conduit to falling into the natural gas that escapes in the drilling fluid tank process and to lose.

3. the novel horizontal continuous electronic disconnector in " new system " can not outgas entirely to the drilling fluid of introducing.

4. do not recognize existing VMS as yet owing to design, factors such as operation cause VMS to analyze the true amount of natural gas that does not reflect in the drilling fluid.

(translation is seen the chief editor's of huge port hydraulic fluid port well logging company 1992 the 2nd phases " well logging communication ")

(3) 92 years utility model patent projects (" mud logging unit of hydrocarbon content in a kind of direct measurement drilling fluid ") of the huge port hydraulic fluid port well logging Xu Youxin of company, the suggestion of development automatic distillation degasser (AVMS) has at first been proposed the patent No. 92230231.6), in order to replace VMS and directly to measure natural gas content in the drilling fluid, proposed to develop the novel mud logging unit-Q92A mud logging unit that is based on the AVMS basis.

The AVMS scheme has the following disadvantages among the Q924A:

1. do not consider full tolerance mud drainage problem;

2. not enough to the full capture measure of deviating from gas;

The problem and the measure of " will deviate from the gas component, the constant quantity tube of sending into of concentration " are not 3. clearly proposed.

When 4. shutoff type is sampled,, can form bigger annular mud dead volume in the sample jar if use minor valve; Then weight is big with big valve, and volume is big, and high price is expensive;

Should make the liquid sample have bigger degassing liquid level when 5. having ignored the degassing of sample jar.

(4) domestic AVMS is blank project certainly;

Closely know: advanced French ALS5000 type instrument (the method geology service company later stage eighties introduces in the Bohai Oil Corporation), GASLOGGER(1988 produces per year), the ALS6000 type does not all mate AVMS, and still mates old-fashioned AMS.

The purpose of invention:

Though above-mentioned VMS has caused the basic serious distortion of air content (about distortion 50%) in theory to the identification of oil-gas Layer and estimate significantly because of gathering the drilling fluid mode; Again because of structure design, inadequate natural endowments such as technology cause that adopting mud sample is deviate from gas and do not reach full capture (again lose should obtain about 1/2), and since entrained air, tube wall absorption heavy component (particularly G5), feasible degassing volume, gas component and concentration distortion; Moreover because manual operations causes amount of gas evolved and analysis result to vary with each individual, operating efficiency spy is low, so it is anxious to be updated that original France produces VMS, needs exploitation new, and more advanced rational degasser replaces it.

The purpose that I design new type of degasser is to overcome above-mentioned major defect, on the previous work basis, design have the drainage of full tolerance mud, the full capture of the full degassing, gas sample full constituent, the constant analyser quantity tube of sending into of concentration, can make the degasser of characteristics such as drainage one sampling one degasification process full-automation, in the hope of in energy exploration of being badly in need of in oil, this country of natural gas for on-the-spot, early stage, quick identification and estimate oil, gas-bearing formation is made some contribution.

The content of invention:

A kind of full tolerance drilling fluid drainage automatic vacuum mud still device is formed and be it is characterized in that by drainage part, tank body part, metering section, confession salt water section: the drainage part is by forming with the vertical drainage tube that is contained in arc baffle plate bottom with arc baffle plate, drainage tube is contained on the geometrical clamp and by union and connects butterfly valve, butterfly valve connects constant flow pump by sebific duct, is fed the upper lateral part of tank body part tank body again through the plunger type two position two-way valve through pipe nipple by constant flow pump; Tank body part was made up of a tank body and a jar end, electrothermal tube and ultrasonic transducer are arranged in the tank body, a plunger type two position two-way valve is equipped with at the jar end, a plunger type two-position valve is adorned in tank body opposite side top, a plunger type two position two-way valve is adorned at the tank body top, there is the oral siphon of a band two-position two-way solenoid valve at the middle part under the tank body side, plunger type two position two-way valve by the tank body top, feed steam absorption bottle side-lower through pipeline, feed the metering section of the gauge line of band liquid level sensor by the top of steam absorption bottle, the top of gauge line can be led to analyser quantity tube and vacuum extractor or can lead to air through pipeline and two-position two-way solenoid valve through pipeline and two-position two-way solenoid valve; Feed salt solution quantitative pot by brine drum through pipeline and two-position two-way solenoid valve for the salt water section, can feed the bottom of steam absorption bottle again through pipeline and two-position two-way solenoid valve, also can feed steam absorption bottle side top through pipeline and two-position two-way solenoid valve, tee piece again, the above-mentioned tee piece other end leads to the recovered brine tube through two-position two-way solenoid valve, the recovered brine tube bottom pipeline is arranged and through micropump and pipeline with salt solution blowback brine drum.

The effect of invention:

(1) " full tolerance drilling fluid drainage automatic vacuum mud still device " surveyed the boundary because it has overcome the basic serious distortion of mud logging to gas and had a far reaching influence, and because of simple in structure, and motionless drilling equipment does not influence geological work and is convenient to promote.

(2) " full tolerance drilling fluid drainage automatic vacuum mud still device " has the drainage of full tolerance drilling fluid, the full degassing is complete to capture, can make the constant input analyser quantity tube of gas sample component and concentration,----degassing--metering of gas volume--carries the gas sample to characteristics such as quantity tube process full-automations in sampling can to make the drilling fluid drainage, it is the creative contribution that shows unique characteristics, will make bigger step in the mud logging element task, its product has very strong competitiveness undoubtedly under the narrow condition in geology market, and be that exploitation vacuum distillation degasser series of products lay the foundation, create certain condition for inspiring novel mud logging unit, gas is surveyed the boundary and will be shown warm solicitude for.

(3) because the legitimate reading of above-mentioned (1), (2) generation, given SPI(ground air content) parameter is with comparativity, have deep geological Significance, be to realize oil-gas Layer contrast between interlayer, well, for on-the-spot, early stage, quick identification and estimate oil-gas Layer and created condition.

The ideal of (4) realization mud logging " the full degassing, straight survey, automation " makes mud logging enter a new stage.

Description of drawings:

Fig. 1 is a thermal vacuum mud distillation degasser schematic diagram

Fig. 2 is full tolerance drilling fluid drainage automatic vacuum mud still device schematic diagram

Fig. 3 is full tolerance drilling fluid drainage automatic vacuum mud still device drainage part schematic diagram

Fig. 4 is full tolerance drilling fluid drainage automatic vacuum mud still device tank body part schematic diagram

Fig. 5 is full tolerance drilling fluid drainage automatic vacuum mud still device metering section schematic diagram

Fig. 6 is that full tolerance drilling fluid drainage automatic vacuum mud still device is for salt water section schematic diagram

Fig. 7 is full tolerance drilling fluid drainage automatic vacuum mud still device overall diagram

Embodiment:

A kind of full tolerance drilling fluid drainage automatic vacuum mud still device is made up of drainage part, tank body part, metering section, confession salt water section:

Drainage part is by this 1 is formed with the vertical drainage tube 2 that is contained in arc baffle plate bottom with arc baffle plate: drainage tube is contained on the geometrical clamp 3, and by union 4 connection butterfly valves 5, butterfly valve connects constant flow pump 8 by sebific duct 7, is fed the upper lateral part of tank body part tank body 11 again through plunger type two position two-way valve F1 through pipe nipple 9 by constant flow pump.

Tank body part was made up of a tank body 11 and a jar end 13: have electrothermal tube 10 and ultrasonic transducer 12, a jar end to adorn a plunger type two position two-way valve F3 above one plunger type two position two-way valve F4, tank body opposite side are housed in the tank body, a plunger type two position two-way valve F2 is adorned at the tank body top, there is the oral siphon of a band two-position two-way solenoid valve f9 at the middle part under the tank body side, by the plunger type two position two-way valve F2 at tank body top, feed steam absorption bottle 16 side-lowers through pipeline 15.

Metering section is made up of the gauge line 18 and the two-position two-way solenoid valve f5 of steam absorption bottle 16 and band liquid level sensor 19, and tank body part feeds steam absorption bottle 16 side-lowers through pipeline 15.Feed the metering section of the gauge line 18 of band liquid level sensor 19 by the top of steam absorption bottle, the top of gauge line can be led to the analyser quantity tube or leads to vacuum extractor or can lead to air through pipeline and two-position two-way solenoid valve f7 through two-position two-way solenoid valve f10 again through pipeline and two-position two-way solenoid valve f5, f6.

Feed salt solution quantitative pot 24 by brine drum 25 through pipeline and two-position two-way solenoid valve f8 for the salt water section, the salt solution quantitative pot can feed the bottom of steam absorption bottle 16 again through pipeline and two-position two-way solenoid valve f4, f3, also can be again can feed in the pipeline 15 through the tee piece of the plunger type two position two-way valve F2 at pipeline and two-position two-way solenoid valve f1, tee piece 23 and tank body top.Above-mentioned tee piece 23 other ends lead to recovered brine tube 21 through two-position two-way solenoid valve f2, and the recovered brine tube bottom has pipeline and leads to back brine drum 25 through micropump 22 and pipeline.

(1) at motionless drilling equipment, do not influence and designed enforceable " the drainage partial devices of full tolerance drilling fluid drainage automatic vacuum mud still device " under the preceding topic of geological work and (see Fig. 2, Fig. 3).

Main points are in the drilling fluid return duct, add an arc baffle plate in this conduit origin or beginning drilling fluid entrance, the people makes a drilling well liquid level of having raised, perforate is embedded under the drilling well liquid level that returns near bottom and the drainage tube that is attached thereto at arc plate washer, so just can reach the purpose that captures full tolerance drilling fluid (mud), because drilling fluid (contains free shape natural gas, solution gas, adsorbed gas) having incited somebody to action wherein before being raised to liquid level, a part of drilling fluid pumps into drainage tube for the degasser sampling by constant flow pump, the degassing, reached the purpose of full tolerance drilling fluid drainage, the drilling fluid that returns on all the other then covers arc baffle plate and flows into drilling fluid (mud) groove through the drilling fluid delivery channel.

(2) full tolerance drilling fluid drainage automatic vacuum mud still device.

For reaching the drainage of full tolerance drilling fluid, deviating from gas and capture, deviate from constant analyser quantity tube, drainage--sampling--degassing and the purpose of gas volume metering automation sent into of gas concentration of component entirely, designed " full tolerance drilling fluid drainage automatic vacuum mud still device ", the part that wherein belongs to invention in person is:

Full tolerance drilling fluid drainage system;

Vacuum column plug valve formula degassing tank (can do with the small-sized plunger valve series that contains husky mud, and can cause bigger mud top vacuum to connect face);

Deviating from gas captures entirely;

Clearly propose gas component, the constant analyser quantity tube of sending into of concentration.And corresponding measure.

Its formation is seen Fig. 2 to Fig. 6.

As shown in Figure 2, degassing principle and process are as follows:

1. vacuumize:

Adopt before the drilling fluid sample, earlier the quantity tube of degassing tank 11 1 absorption bottles 16 1 gauge lines 18, analyser and the pipeline that connects therebetween are evacuated (make F1, F4, f2, f3, f4, f7, f9 etc. locate the position of " pass " before vacuumizing, and make F2, f1, f5, f6, f8, f10 be in " opening " position).F is small-sized plunger valve in the literary composition, and f is a two-position two-way solenoid valve.

2. vacuum condition continues following action down:

A gets full tolerance drilling fluid sample:

Close F2 → open and be the dotted line salient position among the F3(figure) → open F1(make jars 11 be full of drilling fluid → pass F1(and close f8 → pass f1 → open f4, f3 → quantitative salt solution is sent into the into preparation before the water gas collection of absorption bottle 16 → pass f3 → open f8 → finish simultaneously).

The b degassing:

Closing F3(descends tank level, make a free surface in the bigger vacuum, be beneficial to the degassing → pass f5 → open F2 → 10,12 energising work → (jar 11 liquid levels are to being vacuum state between the f5 to deviate from natural gas successively, the natural gas that is beneficial in the drilling fluid is deviate from) → outgas and open F3(when finishing liquid level in the jar " recovery ", tank top gas is sent jar) → F2 → pass 10,12, pass.

The c gas collection:

Open f1(water inlet gas collection: salt solution → f8 in 25 → 24 → f4 → f1 → 16 → 18, will deviate from gas and concentrate on gauge line 18 tops) because structure and technological design, having reached the degassing and having captured entirely and do not have a purpose that air is sneaked into.

D deviates from the metering of gas volume:

Content gauge changes the signal of telecommunication into gas volume and writes down printing automatically.Because the brine drum 25 of opening is communicated with atmosphere, (making 25 liquid levels near liquid level in the gauge line 18) so the gas volume of surveying is a standard operation situation lower volume as far as possible.

E will deviate from the constant input analyser of gas concentration of component quantity tube (gas production sample):

Open f5 → open f6 → gas sample to enter the quantity tube of analyser.

F gas production sample finish → close f6, f4 → open f2, f7 → salt solution is recovered into the little shape pumps of open and close (22) of tube 21 → regularly, and salt solution is pumped into high-order tube 25.

G opens F4, and F2, earial drainage took off the mud of gas, opens f9 simultaneously and carries out tap water flushing, and open 12 and help and wash.

Because the interior liquid measure of the degassing tank of design is big (500 milliliters), it is full tolerance drilling fluid drainage sample in addition, so deviate from tolerance more (＞＞4 milliliters), so can after opening f5, f6, make the gas sample salt solution 11 bodies moving down in the certain buret of the f5 of pre-vacuum pumping state the space enter quantity tube, and the body producing fluid level is still in gauge line.Like this, the gas sample that enters in the quantity tube not only not have to move the phenomenon generation that the gas sample is watered down into quantity tube by air (carrier gas) body as in the past, and has reached the purpose of keeping the concentration that the gas sample depresses at normal atmosphere; In addition, because all among 50 ℃ of insulating boxs, the tracheae line that links with quantity tube also is the heating pipeline to gas transmission line (together with degasser), heavy ends C2-C5 is because environment temperature far exceeds its boiling point, polytetrafluoroethylene (PTFE) pipeline adsorptivity is poor in addition, thereby has reached the constant purpose of gas component.The drilling fluid of full tolerance drainage can be transported to AV-MS and continuous degassing device simultaneously through constant flow pump.

(1) " takes off, directly surveys " mud logging entirely

2 " full tolerance drilling fluid drainage automatic vacuum mud still device "+drilling fluid length are drawn liquid+detector, can realize " take off entirely, directly survey " mud logging.

(2) be used for mud logging that the continuous degassing device is proofreaied and correct

1 " full tolerance drilling fluid drainage automatic vacuum mud still device "+1 continuous degassing device+detector that quantitatively pumps into drilling fluid then can be realized than existing VMS the continuous degassing device being carried out the higher mud logging of correction mass.

Claims (2)

1, a kind of full tolerance drilling fluid drainage automatic vacuum mud still device is made up of drainage part, tank body part, metering section, confession salt water section, it is characterized in that: the drainage part is by forming with the vertical drainage tube that is contained in arc baffle plate bottom with arc baffle plate, drainage tube is contained on the geometrical clamp and by union and connects butterfly valve, butterfly valve connects constant flow pump by sebific duct, is fed the upper lateral part of tank body part tank body again through the plunger type two position two-way valve through pipe nipple by constant flow pump; Tank body part was made up of a tank body and a jar end, electrothermal tube and ultrasonic transducer are arranged in the tank body, a plunger type two position two-way valve is equipped with at the jar end, a plunger type two-position valve is adorned in tank body opposite side top, a plunger type two position two-way valve is adorned at the tank body top, there is the oral siphon of a band two-position two-way solenoid valve at the middle part under the tank body side, plunger type two position two-way valve by the tank body top, feed steam absorption bottle side-lower through pipeline, feed the metering section of the gauge line of band liquid level sensor by the top of steam absorption bottle, the top of gauge line can be led to analyser quantity tube and vacuum extractor or can lead to air through pipeline and two-position two-way solenoid valve through pipeline and two-position two-way solenoid valve.

2, according to the full tolerance drilling fluid drainage automatic vacuum mud still device of claim 1 described it is characterized in that: feed the salt solution quantitative pot by brine drum through pipeline and two-position two-way solenoid valve for the salt water section, can feed the bottom of steam absorption bottle again through pipeline and two-position two-way solenoid valve, also can feed steam absorption bottle side top through pipeline and two-position two-way solenoid valve, tee piece, the above-mentioned tee piece other end leads to the recovered brine tube through two-position two-way solenoid valve, and the recovered brine tube bottom has pipeline and logical with salt solution blowback brine drum through micropump and pipeline.

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