RU217623U1 - DOWNHOLE ANTI-FLIGHT CAMERA - Google Patents

Abstract

The utility model relates to the oil and gas industry, namely to additional underground equipment of an oil well. The downhole anti-flight camera consists of a cylindrical metal body and a pickup sleeve. The body of the chamber is made of a metal pipe with a diameter of 114 mm and a length of 2500 mm, divided by an internal partition into two parts - upper and lower. The upper and lower parts of the chamber body have technological holes with a diameter of 10 mm for better passage of the gas-oil mixture. The upper part of the chamber is designed to catch metal objects and tools, as well as underground pumping equipment. The upper part of the chamber is threaded for connection to the fishing sleeve. Inside the fishing sleeve there is a groove made with the possibility of reliable fixation with the fishing tool when the camera is removed from the well to the surface. The wellbore is protected from emergency equipment, metal objects and tools falling into it.

Description

The utility model relates to the oil and gas industry, namely to additional underground equipment of an oil production well. The utility model is used in oil wells, in which, over time, it becomes necessary to run an additional casing string of a smaller diameter into an already existing production string (2) with a diameter of 146 mm or 168 mm. This need depends on several factors that appear during the operation of wells, namely, the drilling of a new lateral (horizontal) wellbore with the elimination of the old wellbore, as well as the elimination of the identified leakage in the production string by running an additional casing string of a smaller diameter.

In this regard, it is necessary to protect and shut off the hole of an additional casing of a smaller diameter, because during the further operation of such wells, as well as during the maintenance or workover of these wells, the following accidents or complications may occur:

breakage and fall on the well bottom of underground pumping equipment (tubing string (tubing string), installation of electric submersible pump with cable (ESP), installation of a deep-well rod pump (USHRP);

breakage and fall on the bottom of the well of geophysical instruments lowered on a cable or wire during geophysical well surveys (GIS);

falling metal objects and tools (belts for attaching an electric cable to tubing; dies and inserts used in process equipment used in tripping operations during current or workover of wells.

The reason for this may be the breakdown or destruction of pumping equipment, a string of pumping or drill pipes, caused by metal corrosion due to long-term operation of underground equipment, factory defects in the equipment supplied, a violation of the technological process during the operation of underground equipment, a violation of the technology of well workover, the human factor, etc. .d.

In FIG. 1 shows an oil well (1) equipped with an additional smaller diameter casing string (4) with an unprotected hole. Thus, underground equipment (3) falls into an unprotected casing string of smaller diameter at the bottom of the well (8), clogging of the bottom of the well and overlapping of the perforation intervals (6). Accordingly, the technological regime of the well is disturbed, i.e. the inflow of the gas-oil mixture from the oil reservoir (7) decreases.

To restore the health of wells, a set of works is carried out related to the elimination and elimination of accidents and complications that occurred in the wellbore - fishing operations. Extraction of emergency equipment and metal objects (5) from wells with lower diameter additional casing is a laborious and high cost process. This is due to the fact that the fishing tool used (pipe, catchers, taps, overshots, etc.) does not always give a positive result, due to its small overall dimensions and technical characteristics. In the case when it is not possible to pick up a fishing tool for extracting emergency equipment, the well is subject to complete liquidation for technical reasons.

In FIG. 2 shows a utility model (9), the purpose of which is to prevent and protect an additional casing string of smaller diameter (4) from falling emergency underground equipment (5), metal objects and tools into it.

Figure 3 shows an image of a downhole anti-flight camera (KSP).

The downhole anti-flight camera (KSP) consists of a metal case and a pickup sleeve (10). The chamber body is made of a metal pipe with a diameter of 114 mm and a length of 2500 mm, divided by an internal partition (13) into two parts. The upper (12) and lower (14) parts of the chamber have technological holes (11) with a diameter of 10 mm for better passage of the gas-oil mixture. The upper part of the chamber is designed to catch metal objects and tools, as well as underground pumping equipment. The upper part of the chamber is threaded for connection to the fishing sleeve (10).

In FIG. 4 shows a cross-sectional view of the picking collar. The coupling consists of a metal body (15) with a diameter of 120 mm. There is a fishing groove (16) inside the sleeve, due to which there is a reliable fixation with the fishing tool when the camera is removed from the well to the surface. The coupling is connected to the chamber by means of a connecting thread (17).

The chamber is lowered into the well by the workers of the crew being repaired freely dropping it through the open wellhead.

Benefits of the utility model:

ease of manufacture;

the possibility of reuse;

protects an additional casing string of smaller diameter from equipment and tools falling into it;

internal groove of the fishing sleeve, allows you to securely fix the camera with the catcher when it is removed from the well to the surface;

ease of release of the catcher from the camera.

The application of the invention makes it possible to protect the wellbore from penetration into it of emergency equipment, metal objects and tools.

Claims (1)

Downhole anti-flight camera, consisting of a cylindrical metal body and a fishing sleeve, the body of the camera is made of a metal pipe with a diameter of 114 mm and a length of 2500 mm, divided by an internal partition into two parts - upper and lower, which have technological holes with a diameter of 10 mm for better passage of the gas-oil mixture , the upper part of the chamber is designed to catch metal objects and tools, as well as underground pumping equipment, the upper part of the chamber has a thread for connection with a fishing sleeve, inside which there is a groove made with the possibility of reliable fixation with the fishing tool when the camera is removed from the well to the surface.

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