SU976042A1 - Apparatus for measuring soil temperature in a well - Google Patents

Description

(54) DEVICE FOR MEASURING THE TEMPERATURE OF THE SOIL IN THE WELL

The invention relates to devices for measuring the temperature of rocks and can be used to measure the temperature of permafrost in a well. It is known a device for measuring temperature rocks in a well that includes a housing, a rod, a sensing element, a pressure unit, the device is equipped with a disk and, with pads, sensitive elements are placed on KOTOffcix, and the cinematic cams are connected with the disk as far as the stop against the wall of the well D 11. The disadvantage of the device is the impossibility of achieving a reliable body contact between the temperature sensors and the walls of the well caused by the adopted kinematic scheme voltage cams. To ensure cam movement along KojMiyca guides, it is necessary for the housing to have sufficient adhesion to the walls of the well. otherwise, the body will rotate with the rod, and the cams will not move along the body guide grooves. The second major drawback of the device is the cam timing. If one cam touches any obstacle (leakage, ice crust on the borehole wall, or a solid particle of mountain rocks), the remaining cams will not be able to move along the guides due to the tight kinematic coupling of the cam blocks, resulting in accuracy and reliability measurements significantly decreased. The closest to the proposed technical essence and the achieved effect is a device for measuring the temperature of the soil in the well, comprising a housing with a rod and a lever system with contact elements, equipped with temperature sensors f 2 J.

3976

The disadvantage of the device is the accuracy of the temperature intention due to the lack of a cadget thermal contact between the temperature sensor and the borehole wall.

The aim of the invention is to improve the accuracy of measurements of the temperature of the soil in the well.

The goal is achieved by the fact that in a device for measuring tempera. soil tours in the borehole containing a housing with a rod, a lever system with contact elements equipped with a temperature sensor, the housing is equipped with two ring seals, mounted on the outside of the housing on either side of the contact elements, with a scraper located in the lower part of the housing, and passing through the device, while the contact elements are made in the form of discs with the possibility of rolling along the borehole wall.

In addition, temperature sensors are placed around the circumference of the disks.

FIG. 1 shows a device

longitudinal cutter; in fig. 2 - construction: qi of the contact element.

The device case is made of two Parts — inner 1 and outer 2, made in the form of a glass with slots for contact disks 3. Both parts of the case are connected by means of a socket 4, designed to allow air (gases) to pass.

Both ends of the nozzle are threaded. The lower nut 5 placed on the threaded surface of the nozzle is intended to close the housing 1 of the scrapers b, and the upper nut 5 is intended to connect the suspension angle 7 of the rod 8 to the housing part 2. The ring seals 9 are placed on the outer surfaces of the parts Corps 1 g 2.

The lever system, consisting of levers 1O and spring 11, is hinged on racks 12 rigidly mounted on part of housing 1. Temperature sensors 13, for example, thermometer resistance are placed around the circumference of the disks 14, and the terminals of the sensors are soldered to axial contacts 15 that are in contact with the contact springs 16. A reliable electrical contact between the current collecting springs of MOM 16 and the rotating axial contacts is achieved by sibing these parts.

Temperature sensors 13 are covered with a layer & l of heat-conducting cr-gazki and protected from

24

mechanical damage to the aluminum ring 17,

The wires from the current-collecting springs 16 contact elements are led out through the hole in the housing and connected to the gantry cable.

The device works as follows.

When the device is immersed in the wells with the help of the rod 8, the scrapers 6, in contact with the walls of the well, clean them out of dirt, incrustations, frost and ice crusts. The lower annular seal 9, in contact with the walls of the well, additionally cleans them of dust and dirt residues and fills the gap between the walls of the well and part of the housing 1, and the key of the air temperature sensor blowing. When approaching the wellhead of the contact elements 3, the latter are inserted into the well and tightly pressed to its walls using a lever syotema, the arms of which are fixed to the discs 14 of the contact elements 3. Compressing the spring 11 causes the upper arms of the levers 10 to approach and the levers 10 to rotate relative to the hinges located on the uprights 12. All this leads to tight pressing of the contact elements 3 against the walls of the well. Since the scrapers and contact elements are placed on the same forming cylindrical surface of the well, the contact elements 3 move along the surface of the borehole wall fixed by the scrapers 6 and the lower seal 9. The heat flux from the borehole wall is sensed by the ring 17 and transmitted through a layer of wet to the sensor 13, where it is converted into an electrical signal transmitted through the axial contacts 15 and the contact springs 16 to the gauge through a wireline. Air flow or times caused by movement of the device through squiggle or convection is bypassed through pipe 4 located in the center of the body.

The device makes it possible to improve the accuracy of temperature measurement by eliminating factors that distort the natural temperature distribution in the well, to a value of 0.01 ° C when using a platinum thermometer from the resistance as the sensor and to a value 0 when using a copper resistance thermometer. Izoboteki formula 5g

A device for measuring the ground temperature B of a borehole, comprising a 5P7 body with a rod, a pivot system with contact elements equipped with temperature sensors, characterized in that, in order to improve measurement accuracy, the casing is equipped with two annular seals installed on the outer side of the casing both sides of the contact elements, a scraper placed in the lower part of the bark box, and a branch pipe passing through the device, while the contact epefig. 2 2 .. The cops are made in the form of discs with the possibility of rolling along the wall of the well. 2. Device pop. l, differing from the fact that the temperature sensor is placed on the okry disk. sources of information taken into account during the examination 1. USSR author's certificate No. 715780, cl. E 21 B 47/06, 1974. 2. USSR author's certificate No. 741222, cl. E 21 B 47/06, 1978.

Claims (2)

Claim A device for measuring soil temperature in a well, comprising a housing 5 9760 with a rod, a lever system with contact elements equipped with temperature sensors, characterized in that, in order to increase the accuracy of measurements, the housing is equipped with two S ring seals installed on the outside of the housing on both sides of the contact elements, a scraper placed in the lower part of the body, and a pipe passing through the device, while the contact elements 2 * are made in the form of disks with the possibility of rolling along the wall of the well. 2. The device according to π. 1, on the basis of the fact that temperature sensors are placed around the circumference of the disks, information sources taken into account during the examination 1. USSR Copyright Certificate No. 715780, cl. E 21 B 47/06, 1974. 2. USSR author's certificate No. 741222, cl. E 21 B 47/06, 1978.