CN2062760U

CN2062760U - Unit for collecting physical parameters of slurry

Info

Publication number: CN2062760U
Application number: CN90200037U
Authority: CN
Inventors: 石行; 尤装
Original assignee: XINKAI GENERAL PILOT PLANT
Current assignee: XINKAI GENERAL PILOT PLANT
Priority date: 1990-01-06
Filing date: 1990-01-06
Publication date: 1990-09-26

Abstract

The utility model relates to a physical parameter collection unit for slurries, which is suitable for various geologic drilling, oil field development, etc. Making use of two different tubes in length which are inserted into a slurry pool, after ventilation, the physical parameter collection unit for slurries can measure the pressure difference and the pressure of the two tubes and can measure the specific gravity of slurries and the liquid level position of the slurry pool; the physical parameter collection unit for slurries can measure the temperature of the slurries through a temperature sensor simultaneously. By real time and on-line drilling collection of the physical quantities, the physical parameter collection unit for slurries can analyze the conditions under the well (such as leakage, gas immersion, water immersion, well wall collapse), so as to take measures timely, which is convenient to carry out balancing drilling and raise drilling efficiency.

Description

Unit for collecting physical parameters of 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 drillng 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 cost 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, cave-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 natural 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 strata pressure stages, realize the balanced operation of drilling well, will bring very big benefit.

The purpose of this utility model is that invention one cover 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 utility model as shown in Figure 1, it has pressure sensor (1) and pressure sensor (2), temperature pick up (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 sensor (1) and pressure sensor (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 utility model vertically inserts in two pipes in the mud pit in use, keeps the lower port of two pipes that one fixing depth displacement 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 gas pressure 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, gas pressure 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 mud pit by temperature pick up (3).So just realized measurement to mud balance, temperature and mud pit level height.Because pressure sensor (1) and (2) are loaded on the top of two pipes, do not touch mud, good operation conditions.Of the present utility model simple in structure, just can conveniently work as long as be fixed in the mud 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 in the utility model (6) can be a mini air compressor or the compressed air source of compressed 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 in the utility model (4) and short tube (5) can and be made of one together, are convenient to the present invention's laying in mud pit like this.The cross sectional shape of pipe can be a different shape, as garden shape, square, hexagon etc.On long tube in the utility model (4) and the short tube (5) respectively the pressure sensor (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 sensor, make the measure error minimizing of pressure difference value.

Temperature pick up in the utility model can have several, and cloth is placed on mud pumping hole different distance position, by measuring the variation of mud temperature gradient.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 pick up used in the utility model 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 sensing elements.Sensing 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 whole 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 sensing element is converted to digital quantity sends computer (9) back to, computer (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 anomaly 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 sensor (1) and pressure sensor (2), temperature pick up (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 sensor (1) and pressure sensor (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 sensor (1) and pressure sensor (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 sensor 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 pick up (3) is placed on apart from locational several temperature pick ups 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 sensor (1) and (2), temperature pick up (3) all is basic sensing element, each sensing 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 whole system (9).

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