CN201053319Y

CN201053319Y - Horizontal well hard electrode logging device

Info

Publication number: CN201053319Y
Application number: CNU2007200123609U
Authority: CN
Inventors: 王绍山
Original assignee: SHENYANG XINJIN FINE INSTRUMENT INSTRUMENT INSTITUTE
Current assignee: SHENYANG XINJIN FINE INSTRUMENT INSTRUMENT INSTITUTE
Priority date: 2007-05-29
Filing date: 2007-05-29
Publication date: 2008-04-30
Anticipated expiration: 2017-05-29

Abstract

A hard electrode logging instrument for horizontal wells comprises an upper joint (1), a lower joint (6), a transitional joint (8), a locking component (5) and a shell (4). The utility model is characterized in that: insulating rings (2) are arranged in sandwich layers among the upper joint, the lower joint and the transitional joint; an anti-rotation pin (3) is arranged between the insulating rings (2). The utility model is provided with the insulating rings to improve insulating intensity, and has insulation resistance greater than 10 M Ohm when well logging environment reaches to 175 DEG C and 140 Mpa, so as to improve the well logging capability of instruments, prolong life-span and save cost.

Description

The hard electrode logging instrument of horizontal well

Technical field

The utility model belongs to the oil reservoir logging technical field, the hard electrode logging instrument of specifically a kind of horizontal well of reinforced insulation intensity.

Background technology

Continuous intensification along with the oil reservoir logging technology, the well logging object is by the block structure of the simple structure section of thickening, the oil field development middle and later periods, major oil district water content rises, development difficulty is big, cost is high, a lot of in addition area (comprising the deep layer stratum) lithology densifications, and reservoir is thin, interlayer is many or the like, think effectively to solve these difficult problems, best bet should be horizontal well drilling or extended reach well.And at original oil zone for improving well pattern, more and more Duo ground is come on the also referred gradually drilling well schedule of barrier well, simultaneously, because the influence of straight well place layer bare area and stratum non-homogeneity, the oil reservoir well yield is subjected to certain limitation, so, find or drill more oil-gas Layer as much as possible for improving the individual well utilization rate, the horizontal well that enlarges payzone bare area, raising reservoir recovery more and more is utilized.Yet the wellbore construction of horizontal well has bigger risk with comparing of straight well, increases, reaches geology destination difficulty increase etc. as drilling failure, so the key that the horizontal wellbore logging technology is a horizontal well successfully drills.

Facts have proved that hard electrode is the oil reservoir logging important instrument, predominant use is that logging instrument and external cable insulation are isolated, and electrode is main firmly is to insulate under high temperature, high pressure, existing hard electrode is under 120 ℃, 100MPa, insulaion resistance uses the back just can not use less than 1M Ω several times during well logging.

Summary of the invention

The purpose of this utility model provides the hard electrode logging instrument of the good horizontal well of a kind of dielectric strength.

The purpose of this utility model is achieved in that it includes top connection (1), lower contact (6), transit joint (8), latch assembly (5) and shell (4), it is characterized in that: be provided with dead ring (2) in the interlayer between top connection, lower contact and transit joint, between dead ring, be provided with stop pin (3).

In order to make insulation effect better, then shell (4) is an insulating coating.

The utility model has increased dead ring and insulating coating, has improved dielectric strength, reaches under 175 ℃, 140MPa at the well logging environment, and insulaion resistance is greater than 10M Ω, and then has improved instrument well logging ability, increases the service life, saves cost.

Description of drawings

Fig. 1 is a broken section structural representation sketch of the present utility model;

Fig. 2 is the local structure for amplifying simplified schematic diagram of Fig. 1.

The utility model is described in further detail by example below in conjunction with accompanying drawing; but following example only is the utility model example wherein; the rights protection scope of not representing the utility model and being limited, rights protection scope of the present utility model is as the criterion with claims.

The specific embodiment

By Fig. 1～shown in Figure 2, the utility model primary structure comprises: top connection 1, lower contact 6, transit joint 8, latch assembly 5 and insulating coating 4, be provided with dead ring 2 in the interlayer between top connection, lower contact and transit joint, between dead ring, be provided with stop pin 3.

Concrete using method: according to said structure, each parts are coupled together, as shown in Figure 1, logging cable is passed in the centre, two ends are connected to other logger by connecting ring 7, and the utility model is under 175 ℃, the well logging condition of 140MPa, and insulaion resistance is greater than 10M Ω, and then can guarantee that logger carries out the measurement of different pieces of information, thereby realize the purpose of this utility model.

Claims

1. the hard electrode logging instrument of horizontal well, it includes top connection (1), lower contact (6), transit joint (8), latch assembly (5) and shell (4), it is characterized in that: be provided with dead ring (2) in the interlayer between top connection, lower contact and transit joint, between dead ring, be provided with stop pin (3).

2. the hard electrode logging instrument of horizontal well according to claim 1 is characterized in that: shell (4) is an insulating coating.