CN1053124A

CN1053124A - A kind of physical parameter collector for slurry

Info

Publication number: CN1053124A
Application number: CN90100016A
Authority: CN
Inventors: 石行; 尤装
Original assignee: XINKAI UNIVERSAL TRIAL PLANT XICHENG DISTRICT BEIJING
Current assignee: XINKAI UNIVERSAL TRIAL PLANT XICHENG DISTRICT BEIJING
Priority date: 1990-01-06
Filing date: 1990-01-06
Publication date: 1991-07-17
Anticipated expiration: 2005-01-06
Also published as: CN1028799C

Abstract

A kind of physical parameter collector for slurry, it is applicable to various geological drillings, oil-field development etc.It uses two pipes that length is different that insert in the suction pit, and the pressure reduction and the pressure of two pipes is measured in the ventilation back, and the proportion and the mud pit level position that can record mud are simultaneously by temperature sensor measurement mud temperature.The above-mentioned physical quantity of mud can analyze the situation that the down-hole takes place (as if leakage, gas are soaked, water logging, slump in etc. unusual) when gathering drilling well by real-time online, thereby in time takes measures, and is convenient to the enforcement of balanced drilling, improves drilling efficiency.

Description

A kind of physical parameter collector for slurry

A kind of physical parameter collector for slurry, it is suitable for various geological drillings and exploitation, is specially adapted to the drilling well exploitation of oil.

In geological drilling, need carry out landwaste and the equilibrium strata pressure that drilling process produces with mud, with the carrying out of keeping drilling operation and prevent that accident such as blowout from taking place.And the control of mud balance is a major issue in the drilling well.The proportion of mud kicks the beam, and just can not withstand the pressure of subsurface formations, thereby gas blowout accident takes place, and mud balance is excessive, all is very disadvantageous for the drilling efficiency and the rig wearing and tearing of rig.Simultaneously, the excessive drilling expense that also increased of mud balance.In drilling process, the well location difference, the subsurface pressure difference is very big, and along with the progress of drilling depth, the stratum geologic property also can change, thereby makes down-hole pressure produce bigger fluctuation.In drilling process, generally taking place before big geology changes and go out abnormal conditions such as phenomenon leakage, gas are soaked, water logging, slump in, the capital changes the physical property (as proportion, temperature, mud pit level height etc.) of mud, therefore can judge that the down-hole is with situation about taking place by measuring these physical quantitys, take corresponding measure, what guarantee drilling well carries out safety with drilling well smoothly.But,, be difficult under the field condition with conventional instrument and in time the physical parameter of mud accurately measured because the physical environment of well location is very poor.Therefore, present drilling well all is with conservative method, promptly artificially strengthens the proportion of mud, to reduce the possibility that blowout takes place.Can this passive method not only can not stop blowout fully, but also cause very big waste.What is more, used too high mud balance in exploration process often, and the oil, the gas-bearing formation that run into " have been lost ".If can in whole drilling process, use the mud of different specific weight to carry out balance in the different reservoir pressure stages, realize the balanced operation of drilling well, will bring very big benefit.

The objective of the invention is to invent a cover and can be used for the physical parameter collector for slurry that situ of drilling well is measured physical properties such as mud balance, temperature and mud pit level height, for realizing that balanced operation provides reliable assurance in the drilling process.

The present invention as shown in Figure 1, it has pressure transducer (1) and pressure transducer (2), temperature sensor (3), it is characterized in that: have an end to have the long tube (4) of throttling pore and the short tube (5) that an end has throttling pore, pressure transducer (1) and pressure transducer (2) are housed respectively on long tube (4) and short tube (5), compressed air source (6) are arranged at long tube (4) and short tube (5) throttling termination.

The present invention vertically inserts in two pipes in the suction pit in use, keeps the lower port of two pipes that one fixing difference of elevation H is arranged, and the lower ending opening portion of its two pipe all is lower than mud pit level.When work, to the continuous air feed of two pipes, gas constantly overflows by the opening of two pipe lower ends compressed air source (6) by throttling pore, and guaranteeing does not all have mud in two pipes.At this moment, the mud pressure P1 that gaseous tension in the short tube (5) (atmospheric pressure relatively) is produced apart from mud pit level height L1 for short tube (5) lower end oral area, gaseous tension in the long tube (4) is the mud column pressure P2 that long tube (4) lower end oral area is produced apart from mud pit level height L2, if mud balance is d, so:

P1＝d＊L1

P2＝d＊L2

Because L2-L1=H is normal value,

P2-P1＝d＊L2-d＊L1＝d＊（L2-L1）

So d=(P2-P1 is arranged)/H

Therefore, can obtain the proportion of mud by the pressure difference value of two pipes.After knowing mud balance, can try to achieve the height of mud liquid level by L1=P1/d or L2=P2/d.Simultaneously, be inserted in the temperature of measuring mud in the suction pit by temperature sensor (3).So just realized measurement to mud balance, temperature and mud pit level height.Because pressure transducer (1) and (2) are loaded on the top of two pipes, do not touch mud, good operation conditions.Of the present invention simple in structure, just can conveniently work as long as be fixed in the suction pit, and can measure in real time, thereby guarantee the abnormal conditions under the timely monitor well, also provide reliable assurance for carrying out the balanced drilling operation.

Compressed air source among the present invention (6) can be a mini air compressor or the compressed air source of pressurized air gas cylinder and borer system, throttling pore can be less, as long as guarantee that having a spot of air constantly to enter in two pipes and from the lower end of two pipes overflows, making in two pipes does not have mud to get final product.But too the fluctuation of hour mud pit level is bigger to measuring influence.Throttling pore has played the effect to the influence of two pipe pressures of restriction gas flow and isolated bleed pressure.

Long tube among the present invention (4) and short tube (5) can and be made of one together, are convenient to the present invention's laying in suction pit like this.The cross sectional shape of pipe can be a different shape, as garden shape, square, hexagon etc.On long tube among the present invention (4) and the short tube (5) respectively the pressure transducer (1) of dress and (2) also can be changed at differential pressure pickup of straddle mounting between long tube (4) and the short tube (5) with one of therein and adorn a pressure transducer, make the measuring error minimizing of pressure difference value.

Temperature sensor among the present invention can have several, and cloth is placed on mud pumping hole different distance position, by measuring the variation of mud thermograde.Can correspondingly learn the variation of mud viscosity value, the situation that can take place the down-hole more accurately judges.

Pressure (differential pressure) sensor and temperature sensor used among the present invention can be the general industry instrument, also can be instrument and meter for automations, can also be as shown in Figure 2, and sensor is some basic sensitive elements.Sensitive element links to each other with measurement adaptation module (8) separately in inserting standard industrial control (being called for short RTU) (7) by lead, RTU(7) link to each other by the standard serial communication interface central control computer common (9), become the rig physical parameter collector for slurry of an electromechanical integration with can be total system.Central control computer (9) is given RTU(7 by serial communication interface) order of transmission address strobe, the measurement adaptation module (8) that gating is different.Measure adaptation module (8) by behind the gating, the analog quantity of sensitive element is converted to digital quantity sends computing machine (9) back to, computing machine (9) constantly carries out automatic data acquisition to each measuring point by the mode of scanning, and carries out computing and record in real time.Improved monitoring accuracy and speed, and can be at RTU(7) in insert as if the wellhead blowout preventer control adapter module warning device driver module etc.Automatically handle when abnormal occurrence will take place and report to the police monitoring, realize the measurement and the control of electromechanical integration.

Claims

1, a kind of physical parameter collector for slurry, it has pressure transducer (1) and pressure transducer (2), temperature sensor (3), it is characterized in that: have an end to have the long tube (4) of throttling pore and the short tube (5) that disturbance has throttling pore, pressure transducer (1) and pressure transducer (2) are housed respectively on long tube (4) and short tube (5), compressed air source (6) are arranged at long tube (4) and short tube (5) throttling termination.

2, physical parameter collector for slurry as claimed in claim 1 is characterized in that: pressure transducer (1) and pressure transducer (2) are the differential pressure pickup of a straddle mounting between long tube (4) and short tube (5) and are loaded on one of them pressure transducer of long tube (4) and short tube (5).

3, physical parameter collector for slurry as claimed in claim 1 or 2 is characterized in that: temperature sensor (3) is placed on apart from locational several temperature sensors of mud pumping hole different distance for cloth.

4, physical parameter collector for slurry as claimed in claim 1 or 2, it is characterized in that: pressure transducer (1) and (2), temperature sensor (3) all is basic sensitive element, each sensitive element links to each other with measurement adaptation module (8) separately in inserting standard industrial control (7) by lead, and standard industrial control links to each other by the standard serial communication interface central control computer common with can be total system (9).

5, physical parameter collector for slurry as claimed in claim 3, it is characterized in that: pressure transducer (1) and (2), temperature sensor (3) all is basic sensitive element, each sensitive element links to each other with measurement adaptation module (8) separately in inserting standard industrial control (7) by lead, and standard industrial control (7) links to each other by the standard serial communication interface middle face control computer (9) common with can be total system.