RU55424U1 - COMPLEX FOR DELIVERY OF GEOPHYSICAL INSTRUMENTS TO THE DIRECTIONS OF HORIZONTAL WELLS - Google Patents

Abstract

The utility model relates to geophysical and hydrodynamic studies of deviated and horizontal wells with cable instruments. The proposed utility model solves the problem of creating a high-performance technological complex for the prompt delivery of geophysical instruments and apparatuses, regardless of their mass, to the faces of deviated and horizontal wells with small curvature radii and conventionally horizontal sections of long length, which ensures reliable operation with significant bending and axial loads. In the complex for delivering geophysical instruments to the bottom of horizontal wells, including a geophysical cable, propulsion device, electrical communication device, device for attaching the propulsion device to the geophysical cable, the extension cord is made integral in the form of a segment of a flexible long pipe to which a geophysical instrument is connected.

Description

The utility model relates to geophysical and hydrodynamic studies of deviated and horizontal wells with cable instruments.

Known technological complex for the delivery of devices "Horizontal-5" (publ. 2001 "Geophysical exploration of horizontal oil and gas wells" A.A. Molchanov, E.E. Lukyanov, V.A. Rapin St. Petersburg Mining Institute, p. 141, 142), including a geophysical cable, light metal pipes with an internal current lead and a complex logging tool.

The disadvantage of this design is the low reliability of the electrical communication channel with the logging tool due to the complexity of ensuring the sealing of a large number of pipe connections during assembly and operation. The complex does not provide for the possibility of investigating wells by electrical methods using flexible probes.

Known systems with a rigid geophysical cable (publ. 2001. “Geophysical exploration of horizontal oil and gas wells” A.A. Molchanov, E.E. Lukyanov, V.A. Rapin St. Petersburg Mining Institute, pp.143-146), combining the necessary flexibility for winding it onto standard winch of logging hoists and sufficient rigidity for pushing devices to the bottom of a horizontal well.

The disadvantage of this solution is the limited ability to deliver horizontal wells of geophysical instruments and apparatuses to their small mass, which leads to a loss of information content of the applied research complex due to the need to use small-sized downhole instruments that are not intended for these purposes.

A known complex for the delivery of geophysical instruments according to the patent for utility model 42062, including a geophysical cable, propulsion device, electrical communication device, a device for attaching the propulsion to the geophysical cable, a container, the extension cord consists of seamless steel tubing, and the container consists of pipes of non-conductive material.

The disadvantage of this complex is the large investment of time in assembling or disassembling the pipes used as a mover and extension if necessary

replacement of geophysical instruments. In addition, the design of the electrical communication device (“wet contact”) of the complex does not allow for high reliability of connection with the downhole device when it is implemented in sections of wellbores where the values of zenith angles reach 60 or more degrees.

Flexible long pipes are known, which are produced according to TU 14-3R-38-2000, up to 4000 m long, which are produced by Uraltrubmash OJSC (http: // www uralluktbm.uu.ru). It is known to use flexible long pipes when drilling on a depression (“Drilling a flexible pipe on a depression”, an article by Yu. Matveev CJSC FrakMasterNeft, published in the journal Oil and Gas Eurasia, published by Eurasia Press, Inc., Moscow No. 3 - 2004, p. 8-14). The horizontal drilling technology for depression using a flexible NT installation is an organic combination of three technologies - depression drilling, horizontal drilling and flexible continuous pipe technology.

The proposed utility model solves the problem of creating a high-performance technological complex for the prompt delivery of geophysical instruments and apparatuses, regardless of their mass, to the faces of deviated and horizontal wells with small curvature radii and conventionally horizontal sections of long length, which ensures reliable operation with significant bending and axial loads.

To achieve the specified technical result in the complex for the delivery of geophysical instruments to the bottom of horizontal wells including a geophysical cable, propulsion device, electrical communication device, device for attaching the propulsion to the geophysical cable, the extension cord is made integral as a piece of flexible long pipe up to 1000 m long, to which it is connected geophysical instrument.

Distinctive features of the proposed complex for the delivery of geophysical instruments to the bottom of horizontal wells from the aforementioned, closest to it, is that the extension cord is made integral as a segment of a flexible long pipe up to 1000 m long, to which a geophysical instrument is connected.

Due to the presence of these signs, guaranteed delivery of logging tools and apparatuses of various designs to horizontal wells and lateral horizontal shafts with small bending radii is ensured, the reliability of electrical communication is increased by eliminating the need for its implementation in sections of wellbores with large values of zenith angles, and the possibility of emergency well research situations,

equipped with filters in the form of holes or slots, and also increases the efficiency of measurements and the reliability of their results under conditions of high pressures and temperatures.

The proposed complex for the delivery of geophysical instruments to the bottom of horizontal wells is illustrated by the drawings presented in figures 1-4.

Figure 1 shows the descent of a geophysical instrument, using a winch and a live roll;

Figure 2 shows an extension wound from a winch drum into a well;

Figure 3 shows the estimated number of tubing, which is lowered into the well;

Figure 4 shows a pipe string (extension cord and mover) with a geophysical instrument lowered to a predetermined depth.

The device delivery complex to the bottom of horizontal wells (Figs. 1-4) is a set of the following equipment: extension cord 1, propulsion device 2, electrical communication device (“wet contact”) 3, device for attaching the propulsion device to the geophysical cable 4, cable 5 (Fig. .four).

1 - extension cord (Fig. 1) - a segment of a flexible long pipe up to 1000 meters long, made of steel or other material with a wire communication channel, the role of which may be performed by a load-carrying geophysical cable previously passed inside the pipe. The lower and upper parts of the pipe are respectively equipped with a cable lug and an instrument head, to which live cable conductors are connected. In the case of using a steel pipe, the breaking strength of which exceeds the breaking strength of the geophysical cable used in research, the communication channel with the device, to reduce the weight of the extension cord, can be achieved using a special lightweight wire. The flexibility of the pipe is ensured by its mechanical properties. Long flexible pipes are manufactured by Uraltrubmash OJSC from 10GMF steel with an outer diameter of 33.5 mm and a wall thickness of 3.0 mm. Pipes have the following properties: yield strength - not less than 390MPa, temporary tensile strength - not less than 450MPa, elongation - not less than 22%. The properties of the pipe are changed by changing the heat treatment mode. The use of a long pipe facilitates the design, which in turn leads to an increase in labor productivity when assembling the extension cord, and the frictional resistance force decreases when the extension cord moves in a conditionally horizontal part of the wellbore, thus the technical result is achieved through the use of an integral long pipe.

2 - mover (figure 4) (mounted above the extension cord and is designed to create efforts to overcome the friction forces by the geophysical instrument and extension cord on a conditionally horizontal section) - is a set of pipes consisting of tubing with a nominal diameter of 33 or 42 mm, mounted above a flexible extension pipe and designed to push geophysical instruments and an extension cord to the bottom of the wells by creating efforts to overcome the friction forces with a geophysical device and extension cord on a horizontal chastke trunk;

3 - electrical communication device (Fig. 4) (“wet contact”) designed for the electrical connection of deep instruments with a geophysical cable in a fluid filling a well, regardless of its degree of mineralization. The mechanical fastening and electrical connection of the flexible pipe and the fixed part of the device is carried out using a tip that has a reinforced thread. The movable part of the device for the implementation of electrical communications (cable lug) is attached to the geophysical cable and to create an electrical connection is delivered under its own weight to the fixed part of the device and fixed in it;

4 - device for fastening the mover to the geophysical cable (Fig. 4) provides reliable mechanical fastening of the mover to the load-bearing geophysical cable, as well as the release of the cable in emergency situations in wells (tacking of the geophysical instrument, extension cord or mover).

- a winch 6 mounted on the chassis of a car or trailer (Fig. 1) with a large-diameter drum and a reversible electric (hydraulic) drive. The diameter of the drum is determined by the value of the minimum bending radius of a long pipe wound around it. For the descent (reeling) of the pipe into the well, the installation of its upper part (instrument head) at the mouth and lifting (winding) on the winch drum, a section of a load-carrying geophysical cable or rope is placed.

- a large diameter hanging roller or roller table 7 (FIG. 1) for guiding the pipe at the wellhead, the diameter of which should eliminate the permanent deformation of the pipe body;

Geophysical surveys are performed in the following sequence. Using a winch 6 and a suspension roller or roller table 7 previously fixed on the hook of the drilling rig, a flexible long pipe - extension cord 1 is wound from the drum and its lower part is lowered onto the receiving bridges or onto the rotor table. To the cable end of the pipe (extension cord) is connected

a geophysical instrument 8 and it is lowered into the well until the extension cord is completely unwound, after which the instrument head 9 (Fig. 1) is installed on the elevator. To the head 9 is connected, previously fixed on the mover 2 (figure 2) (on the lower tube of the mover), the fixed part of the device for the implementation of electrical communication 3. Calculated using the computer program "Program for selecting methods for the delivery of geophysical instruments to the bottom of horizontal wells" (ENOT -2002) the required number of tubing of small diameter (propulsor) by the drilling crew workers is lowered into the well. When the calculated depth is reached, the upper mover tube with the help of the clutch 10 is fixed on the elevator 11 (Fig. 3), and the cable lug mounted on the geophysical cable 5 is placed inside the mover’s pipes 4. The lug together with the cable under its own weight is delivered to the fixed part of the electric communication device 3 and fixed in it (figure 3). Next, the pipe string (mover and extension cord) using the fastener device mover 4, is attached to the cable, which lowers to a predetermined depth (figure 4). The criterion for successful delivery is the excess weight of the mover over the frictional resistance when moving the geophysical instrument and extension in the conventionally horizontal part of the wellbore by 1.4-1.5 times. When using an extension cord in the form of an integral flexible long pipe, which is lighter than a collapsible extension cord, labor productivity increases when assembling the extension cord and during geophysical studies, the total weight of the kmplex decreases, and the frictional resistance decreases when the extension cord moves to the faces of deviated and horizontal wells with small radii curvature and conventionally horizontal sections of great length, which achieves the possibility of prompt delivery of geophysical instruments to bottom faces open and horizontal wells with small curvature radii and conventionally horizontal sections of great length. Measurements in the well are carried out by performing the necessary number of tripping operations of the logging tool.

Claims (1)

A complex for delivering geophysical instruments to the bottom of horizontal wells, including a geophysical cable, propulsion device, electrical communication device, device for attaching the propulsion to the geophysical cable, extension cord, characterized in that the extension cord is made integral as a piece of flexible long pipe up to 1000 m long, to to which a geophysical instrument is attached.