Downhole instrument mounting seat

Abstract

The utility model discloses a downhole instrument mounting seat which comprises two mounting seat single bodies which are mounted on an oil pipe at intervals in the axial direction of the oil pipe. The installation seat single body comprises two clamping blocks which are in a semi-ring shape, the concave face sides of the two clamping blocks are oppositely arranged, a through hole is formed between the two clamping blocks, and the two clamping blocks are connected to the oil pipe in a sleeving mode through the through hole. The two instrument mounting grooves are formed in one of the clamping blocks at intervals; the axis of the instrument mounting hole is parallel to the axis of the through hole; two pressing grooves are formed in the bottom of the instrument mounting pressing block, and the two pressing grooves and the two instrument mounting grooves are in one-to-one correspondence to form a cylindrical instrument mounting hole; wherein the underground instrument is mounted in the instrument mounting hole. According to the underground instrument mounting seat, a measuring instrument is mounted in a manner of external clamping of the mounting seat, the structure of a tubular column is not changed, and leakage and tripping risks are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of instrument installation technology, and specifically relates to a downhole instrument mounting base. Background Technology

[0002] During geological surveys or oil and gas field exploration and development, it is necessary to measure and record various downhole parameters, such as downhole pressure, temperature, and natural gamma data. Currently, an instrument carrier (commonly known as a support tube in engineering) is used. This involves designing and manufacturing a downhole instrument carrier specifically for a particular downhole instrument (length and outer diameter). An axial groove is cut into the outer side of the carrier, allowing the downhole instrument to be axially mounted within the groove of the support tube. External clamping blocks secure the measuring instrument within the groove. After the downhole instrument support tube is connected to the drill pipe or tubing, the instrument is transported to the predetermined depth downhole via the drill pipe or tubing.

[0003] The tray installation method solves the problem of safely delivering instruments to the predetermined depth downhole. However, this method still has the following shortcomings: First, the tray installation method has poor versatility. The length, width, and depth of the outer groove of the instrument carrier are specifically designed and manufactured for a certain model of downhole instrument. If other models of instruments need to be installed, the tray needs to be redesigned and manufactured; otherwise, the instrument installation will be unsecured, and there is a risk of shaking, damaging the instrument, or even the instrument falling off. Second, in actual construction, the upper and lower connecting thread types of the tray often do not match the thread types of the drill pipe or tubing. Adaptor joints need to be added to the upper and lower parts of the tray, increasing the risk of leakage or even disconnection. Utility Model Content

[0004] The purpose of this utility model is to provide a downhole instrument mounting base that uses an external clamping method to install measuring instruments without changing the tubing structure, without requiring a specific support, reducing consumables, saving costs, simplifying installation, and reducing the risk of leakage or tripping.

[0005] The technical solution provided by this utility model is as follows:

[0006] Two mounting base units are installed on the oil pipe at intervals along the oil pipe axis;

[0007] The mounting base unit includes:

[0008] Two clamping blocks, which are semi-circular in shape, are arranged with their concave sides facing each other, forming a through hole between the two clamping blocks, and are sleeved on the oil pipe through the through hole;

[0009] Two instrument mounting grooves are spaced apart on one of the clamping blocks; the axis of the instrument mounting hole is parallel to the axis of the through hole;

[0010] The instrument mounting block is connected to the clamping block by screws; the bottom of the instrument mounting block has two clamping grooves, which correspond one-to-one with the two instrument mounting grooves to form a cylindrical instrument mounting hole;

[0011] The downhole instruments are installed in the instrument mounting holes.

[0012] Preferably, the two clamping blocks are secured with radial screws.

[0013] Preferably, the diameter of the instrument mounting hole is the same as the outer diameter of the downhole instrument.

[0014] Preferably, the inner side of the instrument mounting hole is machined into a wavy or striped shape to increase the friction between its inner side and the clamped part or the drill rod.

[0015] Preferably, the two ends of the two clamping blocks are chamfered.

[0016] Preferably, the thickness of the clamping block with the instrument mounting groove is greater than the thickness of the clamping block without the instrument mounting groove.

[0017] The beneficial effects of this utility model are:

[0018] (1) The downhole instrument mounting base provided by this utility model does not require a special instrument support, has strong versatility, is easy to install, and reduces consumables and saves costs.

[0019] (2) The downhole instrument mounting base provided by this utility model does not change the tubing structure and does not require conversion connectors, thus reducing the risk of leakage or tripping. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the downhole instrument mounting base described in this utility model.

[0021] Figure 2 This is a schematic diagram of the installation of the downhole instrument mounting base described in this utility model.

[0022] Figure 3 This is a schematic diagram of the longitudinal section of the downhole instrument mounting base described in this utility model. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0024] like Figure 1-3As shown, this utility model provides a downhole instrument mounting base, including two mounting base units, which are installed on the tubing at intervals along the tubing axis. Each mounting base unit includes two clamping blocks 140, which are semi-annular. The concave sides of the two clamping blocks are arranged opposite each other, and a through hole 150 is formed between the two clamping blocks. The through hole 150 is used to fit onto the tubing. The diameter of the through hole 150 is the same as the outer diameter of the tubing or short drill pipe 110, and its inner side is wavy or striped to increase the friction between the inner side of the mounting base and the clamped tubing or drill pipe, thus preventing slippage. The two clamping blocks 140 are fastened with radial screws, and their ends are chamfered to avoid obstruction at the downhole directional section and diameter change position when running the tubing string. One of the clamping blocks 140 has two instrument mounting grooves spaced apart. The axis of the instrument mounting hole is parallel to the axis of the through hole. The thickness of the clamping block with the instrument mounting groove is greater than the thickness of the clamping block without the instrument mounting groove. An instrument mounting pressure block 170 is connected to the clamping block by screws. The bottom of the instrument mounting pressure block 170 has two clamping grooves. The two clamping grooves and the two instrument mounting grooves correspond one-to-one to form a cylindrical instrument mounting hole 160. The diameter of the instrument mounting hole 160 is the same as the outer diameter of the downhole instrument 120. The instrument mounting pressure block 170 has multiple pressure block fastening holes 180, which are symmetrically arranged on the instrument mounting pressure block 170. The instrument mounting pressure block 170 is fastened to the clamping block 140 by screws.

[0025] When installing downhole instruments, two mounting base units are clamped and fixed to both sides of the downhole instrument. The mounting base units are then connected to the upper and lower sides of one end of the tubing or short drill pipe via through holes 150 between the two semi-annular clamping blocks 140. Screws are passed through the plurality of mounting holes 130 to secure the two clamping blocks. After the downhole instrument 120 is programmed and connected to the battery, it is placed into the two instrument mounting holes 160. The instrument mounting pressure block 170 is used to press the downhole instrument down, and screws are passed through the plurality of pressure block fastening holes 180 to fix the instrument mounting pressure block 170 to the clamping block 140. The drill pipe or tubing after clamping the instrument is connected to the wellhead string, and the instrument is advanced to the predetermined depth.

[0026] When disassembling downhole instruments, after the downhole instruments are brought out of the well, loosen the screws inside the multiple clamping holes 180 on the instrument mounting block 170, remove the instrument from between the instrument mounting block 170 and the clamping block 140, remove the screws inside the mounting holes 130 on both sides of the clamping block 140, loosen the two clamping blocks 140 from the tubing or short drill pipe, remove the battery, and retrieve the instrument's measurement data to complete the operation.

[0027] This utility model provides a downhole instrument mounting base that externally clamps and mounts measuring instruments on the outside of the tubing (drill pipe or tubing) to be run downhole. It eliminates the need for a dedicated instrument support, offering advantages such as high versatility and simple installation. Furthermore, by using only an external clamp for mounting the measuring instrument, it reduces material consumables and saves costs. Compared to traditional support mounting methods, this downhole instrument mounting base does not alter the tubing structure and eliminates the need for adapter connections, reducing the operational risks of leakage or even disconnection.

[0028] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A downhole instrument mounting base, characterized in that, include: Two mounting base units are installed on the oil pipe at intervals along the oil pipe axis; The mounting base unit includes: Two clamping blocks, which are semi-circular in shape, are arranged with their concave sides facing each other, forming a through hole between the two clamping blocks, and are sleeved on the oil pipe through the through hole; Two instrument mounting grooves are spaced apart on one of the clamping blocks; An instrument mounting block is connected to the clamping block by screws; the bottom of the instrument mounting block has two clamping grooves, which correspond one-to-one with the two instrument mounting grooves to form a cylindrical instrument mounting hole; the axis of the instrument mounting hole is parallel to the axis of the through hole. The downhole instruments are installed in the instrument mounting holes.

2. The downhole instrument mounting base according to claim 1, characterized in that, The two clamping blocks are secured with radial screws.

3. The downhole instrument mounting base according to claim 1, characterized in that, The diameter of the instrument mounting hole is the same as the outer diameter of the downhole instrument.

4. The downhole instrument mounting base according to claim 1, characterized in that, The inner side of the instrument mounting hole is machined into a wavy or striped shape to increase the friction between its inner side and the clamped oil pipe or drill rod.

5. The downhole instrument mounting base according to claim 1, characterized in that, The two ends of the two clamping blocks are chamfered.

6. The downhole instrument mounting base according to claim 1, characterized in that, The thickness of the clamping block with the instrument mounting groove is greater than the thickness of the clamping block without the instrument mounting groove.

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