SU832077A1 - Device for suspending down-the-hole instruments - Google Patents

Description

(54) DEVICE FOR SUSPENSION OF DEPTH DEVICES

one

The invention relates to the oil industry and can be used in the study of wells equipped with a submersible electric pump.

The known dredger suspension in a borehole, containing a cable and a device for hanging the device, located in a string of drill pipes near the wellhead 1J.

The disadvantage of such a suspension is the need for an autonomous power source for the electrical circuit of the device for a long period of time, rigid fixation of the device without the possibility of moving the device relative to the pipe string, which does not allow for research work in the basics under the pumps.

Closest to the invention to the technical essence and the achieved result is a device for the suspension of depth gauges, containing a saddle installed in the pipes, in which is placed

open contact, connected via cable to the depth device 2.

The drawback of the device is the impossibility of carrying out research work within the productive interval, which is below the submerged centrifugal electric pump.

The purpose of the invention is to provide the possibility of measuring the depth device in the productive interval of a well operated by a submersible electric pump.

This goal is achieved by the fact that the device is equipped with a sealing gland that separates the suction and discharge lines, and the contact together with the cable and the device have the ability to move in pipes.

The drawing shows the proposed device.

The device is located in the production string 1. On the tubing 2, the electric pump 3 is illuminated.

discharge line 4. Electric pump 3

Claims (2)

connected to the power cable 5. Seal 6; located under the saddle 7, and the guide rollers 8 are designed to seal and J cable cable 9 down to bypass the electric pump through the cable channel 10. Coupling 11 fitted on the saddle contains a contact electrode 12 connected to the conductor core of the logging cable 9 and isolated from the housing couplings, but in contact with the well medium. The coupling 11 is rigidly connected to the upper end of the cable 9, at the lower end of which a depth gauge 13 is suspended near the productive plates 15. A tone 14 and a load 16 are located above the instrument. In the period between the borehole studies, the cable 9 is lowered down until the coupling 11 and the seat 7 are seated. a) the device captures the coupling 11 and electrically connects to the electrode 12 of the surface apparatus, after which the device 13 is supplied with a supply current. The tool 13 is drawn along the walls of the well during the test as usual from the surface using a winch. At the end of the research, the device 13 goes down the entire length of the cable 9, the device is uncoupled and lifted to the surface. The length of cable 9 in the presence of a sump, whose height is greater than the length of the device, is determined from the ratio L Ha-Hc + h where HjiT is the depth of the bottom of the lower productive formation, m; Not - depth of descent of a saddle, m; h is the height to which the device descends under the base of the lower productive formation. It can be taken as 2-3 m. If the bottom is close to the lower perforations, the device can be lowered directly onto the bottom and the length of the cable is determined accordingly. At the same time, in order for the device not to be hit against the walls of the well under the influence of turbulent flow, a centering lamp should be placed on the device and the load should be placed 5-100m higher than the device 13. remote reservoir studies with devices placed under the pumps during the operation of the latter with the measurement of pressures, flow profiles, and temperature. The suspension can be applied in wells operated by other types of brushless pumps. Claim device A device for suspending a deep-well instrument, comprising a saddle installed in pipes, in which an open contact is placed, connected by means of a cable to a deep-well device, characterized in the discharge line of which is located above the productive interval, it is equipped with a sealing seal that separates the suction and discharge lines, with than contact with cable and device have the ability to move in pipes. Sources of information taken into account during the examination 1. USSR author's certificate No. 235681, cl. E 21 B 47/00, 1967. 2. USSR author's certificate number 432271, cl. E 21 B 17/02, 1972.