RU213860U1 - WELL BOTTOM ANGLE CONTROL DEVICE FOR HORIZONTAL DIRECTIONAL DRILLING - Google Patents

Abstract

The utility model relates to well bottom angle control systems for horizontal directional drilling (HIB) and is used when performing work on trenchless laying of engineering communications.

The technical effect, which consists in the ability to determine and control the angles of the well trajectory after each expansion to correct the geometry of the insertion of the siphon head into the well and to provide real statistical data on the geometry of the well, is achieved due to the fact that in the device for controlling the angles of the well bottom for horizontally directional drilling, containing a housing and accelerometers installed in the housing, according to the proposed utility model, a power source and an electronic board with a processor and a device for recording and storing information are placed inside the housing. 4 ill.

Description

The utility model relates to well bottom angle control systems for horizontal directional drilling (HDD) and is used when performing work on trenchless laying of engineering communications.

Location systems for HDD are designed to control the movement of the drill head underground during drilling, which allows the operator of the HDD rig to drill according to the project and prevent damage to underground utilities encountered along the way. This equipment, due to its sensitivity, allows you to determine the position of the drilling head underground and accurately control it, while effectively bypassing obstacles at a considerable distance from underground objects, in particular gas pipelines, oil pipelines, water pipes, telephone and Internet cables, collectors.

At the next stage of the construction of underground pipelines using the HDD method, namely at the stage of expansion of a pilot well, operational control of changes in its trajectory (angles) is necessary, since during expansion of the well, especially multiple, any changes remain unknown. The factors influencing such a change in the well trajectory during expansion are, in particular, the heterogeneous geological structure of the soil along the drilling interval, the type of soil, the design features of the tool, and the drilling fluid. The lack of information about the change in the trajectory (angles) of the well can cause accidents (damage or the impossibility of bending the pipe during its laying), increase or disruption of drilling time.

The closest in technical essence and the achieved effect is a cable submersible probe of HDD location systems, containing a housing and accelerometers built into the housing. [https://sense-hdd.ru/product/zond-izluchatel-sns-st-c/].

The disadvantages of this device are limited functionality, namely damage to the cable connection. Soldering operations during the drill string extension lead to significant time losses, which is one of the main risk factors in HDD. On the other hand, with significant dynamic loads and a large number of column turns, the cable line is extremely unreliable. And if the cable is damaged, it cannot be restored. The second disadvantage is that the fixation of the angles has to be carried out manually, recording the angle and the number of the corresponding rod.

The technical problem is the creation of a device that provides accurate information about the angles of the bottom of the well at the stage of its expansion.

The technical results of the proposed solution are the ability to determine and control the angles of the well trajectory after each expansion to correct the geometry of inserting the siphon head into the well, providing real statistical data on the geometry of the well.

These technical results are achieved by the fact that in the device for monitoring the angles of the bottom of the well for horizontal directional drilling, containing a housing and accelerometers installed in the housing, according to the proposed utility model, a power source and an electronic board with a processor and a device for recording and storing information are placed inside the housing.

Measurement and fixation of angles takes place at a static position of the drill string. After the well bottom angle control device passes through the well, all changes in angles relative to the static (initial) position of the drill string entry point from the accelerometers enter the processor for processing and subsequent transfer to the information recording and storage device. The power supply ensures uninterrupted operation of the device, recording and storage of information. After the drill string has passed through and surfaced, the bottom hole angle control device for horizontal directional drilling is removed and connected to a computer for processing and building a profile of the bottom of the hole. Knowing the lengths of the drill pipes and the angles at the corresponding intervals, as well as having the entry and exit points of the drill string to the surface as the base points, it is possible to build a profile of the bottom of the well with an accuracy of its angles sufficient to determine potentially dangerous places, such as underground pits and heterogeneity soil (another type of soil, quicksand). With a subsequent change in the diameter of the well when pulling the siphon (welded pipes) according to the technical specifications of the customer, using the information received from the device, it is possible to change the angles of the bottom of the well for trouble-free installation of the latter. Thus, it is possible to determine and control the angles of the well trajectory after each reaming to correct the geometry of insertion of the siphon head into the well and obtain real statistical data on the geometry of the well.

The well bottom angle control device for horizontal directional drilling is illustrated in the drawings, where

in fig. 1 - presented - block diagram;

in fig. 2 - general view with the back cover removed,

in fig. 3 - schematic arrangement of elements,

in fig. 4 is an example of using the device.

The bottom angle control device for horizontal directional drilling contains a body 1 (Fig. 2, 3, 4), made, for example, in the form of a pipe having a front 2 (Fig. 3) and a rear 3 plugs. Inside the housing 1, an autonomous power source 4 (Fig. 1, 3) is installed, for example, batteries, an electronic board 5 (Fig. 3) with two accelerometers 6, 7 (Fig. 1), a processor 8 and a connector 9 (Fig. 1, 2) connecting a cable for reading information and charging batteries, a device for recording and storing information 10.

The claimed utility model works as follows.

During expansion, the drill string rotates. At the start of rotation, accelerometers 6 and 7 transmit information about the start of rotation to processor 8. Processor 8 goes into sleep mode during rotation to conserve battery power. After the rotation is stopped for the period of work on building up the drilling machine rod, the accelerometers 6 and 7 transmit information to the processor 8 about the absence of a change in the angle and simultaneously transmit the current angle readings to it. Next, processor 8 receives information and determines from which accelerometer this information came, for example, if the angle is from 0 degrees to 30 degrees, then processor 8 extracts data on the angle from accelerometer 6, if the angle is greater than 30 degrees - from accelerometer 7. Information about the angle the processor 8 writes to the information recording and storage device 10. After the start of rotation, the process is repeated. And so on until the device is turned off (the end of the production process). The presence of two accelerometers is due to the fact that one is more accurate at angles up to 40 degrees, the other - from 30 to 90 degrees. After removing the device for monitoring the angles of the bottom of the well from the well, plug 2 is unscrewed and a cable is connected to connector 9 on board 5 for interfacing with a computer. The data are recorded on a computer and processed by a specialized program, after which they are displayed in the form of a table for analysis and decision-making on further actions for the production of work. In the presence of critical angles, the employee decides on additional expansion of the well or drilling it with a different type of expander.

Claims (1)

Well bottom angle control device for horizontal directional drilling, comprising a housing and accelerometers installed in the housing, characterized in that a power source and an electronic board with a processor and a device for recording and storing information are placed inside the housing.

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