SU985265A1 - Telemetry string of drill pipes - Google Patents

Description

(54) TELEMETRIC COLUMN OF DRILL PIPES

one

The invention relates to a drilling tool, in particular, to drill pipes with wire lines embedded therein, and can be used in the oil and gas industry in drilling deep or inclined wells, where reliable information about the parameters of the drilling process is of paramount importance.

. A well-known telemetric string of drill pipes includes threaded pipe joints and a system of annular electrical contacts located one behind the other on an insulating base with a transition to the end to a smaller diameter of the rings. This system is located strictly along the axis of the threaded joint of pipes and has elastic self-sealing elements sealing the electrical connection from the washing liquid 1.

A disadvantage of the known construction is that it has a high probability of contact damage during tripping operations, since it requires simultaneous alignment of the electrical and mechanical connections located respectively on the pipe axis

and on the pipe body, increases the hydrodynamic resistance in the pipes and the abrasive wear of the cable and, most importantly, the outer parts of the contact system, requires a high complexity of the operations of preparing contact systems for connection due to poor approach to the cleaned particles and moisture contact surfaces does not provide reliable sealing contact systems.

The closest technical solution to the present invention is a telemetric drill string of pipes, including connecting sleeves and a power line with electrocontact joints 1.

The disadvantage of this design lies in the need to install intermediate amplifiers with individual power supply (as shown by measurements of the inductive coupling coefficient, it is necessary to amplify the useful signal through every 1000 m of pipes), the need to install downhole current sources. The reliability of the contacts electrical connections is also insufficient. Comrade The purpose of the invention is to expand the range of obtaining information by providing multi-channel communication, as well as improving the reliability of electrical contact connections. This goal is achieved by the fact that in a telemetry string of drill pipes, including couplings and an electric line with electrocontact joints, the latter are made in the form of bushing insulators and an electrocontact coupler installed at the pipe ends, and the couplings are made with studs and annular grooves for axial retainers, and the ends of the pipes have surfaces in response to them. The locking knob of the axial movement of the spline coupling can be made in the form of a spiral of a rectangular rod; In the manufacture of drill pipes from a light alloy material, a reinforcing ring can be installed in the groove for the axial movement lock. Electrocontact coupling can be made in the form of a pipe made of elastic material, having bevels on the ends and rollers reinforced by a pair-worn strap, and the pipe has pressure rings installed at the ends and a steel sleeve installed in its middle part with sealing elements on the outside . The locking pins for axial movement of the splined coupling have the means of their installation in the working position. FIG. 1 shows the connections of the ends of the pipes of the telemetric drill string, general view; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. 2; in fig. 4 - contact node of the electrical connection system of the telemetric drill string; in fig. 5 is a sectional view BB in FIG. 4. The telemetry string of drill pipes 1 has the same device of its ends, which, when connecting the pipes, enter the coupling slot 2 and are fixed by a mortgage element 3. The ends of the pipe are equipped with a bushing insulator 4 that carries through contacts 5 that form galvanic contact with the pipes when connected. contact rollers 6, fixed in pairs with the help of axles .7 on connecting strips 8. A sleeve 9, bearing on itself sealing elements 10, is mounted in the housing of an electrocontact coupling 11, Made of elastic insulating material and limited at its ends by retaining rings 12. For pipes made of aluminum alloys, a reinforcing (reinforcing) ring 13 is provided, which protects the surfaces of the grooves at the ends of pipes from smothering and rapid wear. Insulated conductors 14 are embedded in grooves that run along the tubes forming the cylindrical surface (or protrusions of slits) and are fixed there with, for example, a curing compound. The liner 15 is fixed in the desired position by the spring bar 16 fixed on the axis 17. The telemetric string of drill pipes 1 transmits a torque (rotary drilling) or accepts a reactive torque (turbine drilling) with its slots and splines during operation. pipes through retainer 3 and annular grooves (for pipes made of aluminum alloys with steel spline couplings, this load is also transmitted through the reinforcing steel ring 13). The compressive axial load is perceived by the ends of the pipes. The sealing of the pipe connection from the internal pressure is achieved by the sealing elements 10, and from the external pressure by the elastic housing of the electrical contact sleeve 11, while also sealing the electrical connection. The upper connection of the pipe with the slotted coupling is carried out on the pipe base (or on the drill gangways), for which the splined coupling 2 is put on the end of the pipe 1, the coupling and pipe slots are aligned and the coupling moves further and until the circular grooves of the pipe and the coupling align. After that, the retainer 3, made in the form of a spiral, is pushed to the end into the tangential window of the coupling 2, while in case of jamming, the spiral can rotate along the coil, thus achieving the centering of the spiral along the grooves and removing the jamming particles in the inter-turn space of the spiral. Tubes prepared in this way can be lowered into the well in the usual way with the aid of a pulley system, hook and elevator. After the first pipe is lowered into its sleeve, an electric contact sleeve 11 (9, 10, 12) is inserted, which moves along the slots down to the stop. Then, at the elevator, the next pipe is fed from the gangways, which is guided along the splines of the coupling until the ends of the connected pipes stop. In this case, the groove of the upper pipe and the groove of the coupling are combined, after which the inset element is pushed into the grooves of the pipe and coupling through the tangential window in the coupling. Further, the operations of connecting the pipes during telemetry descent are repeated. When lifting pipes, operations are performed in reverse order, with the only difference that lifting is carried out by candles and the connections inside the candles are not disassembled, and also that electrical contact sleeves 9, 10, 11 12 are not removed from coupling 2. On subsequent descents, wipe the contact parts of the pipes 4, 5, 6 with a dry cloth.

In addition to the power functions (mechanical and hydraulic power transmission from the surface to the bottom), the telemetry string of drill pipes 1 performs the functions of a multi-channel communication line with the bottom of a well. Each link is formed by an insulated conductor 14 enclosed in a groove made on the surface of the pipe 1 and an insulating material, such as epoxy, secured in that groove.

At the ends of the pipe 1 wire 14 is missed y. into the holes made in her body and you enter the nest of bushing insulators 4,

where it is connected to the pass-through contact 5.

Pass-through insulators 4 are pressed in

in the socket of the pipe 1 with simultaneous filling of all voids under the bushing insulator with insulating material, in the holes and the pipe pipe. Neighboring pipes form an electrical circuit with the help of an electric contact coupling having connecting strips 8 with contact rollers 6 fixed at their ends. When connecting pipes when they touch their ends, reliable contact is made between the connecting contacts 5 and contact rollers 6, since during axial displacement of the end face the upper pipe there is a force on the thrust ring 12, which transmits this force to the elastic housing 11 of the electric contact clutch, and since the rings 12 and the sealing cup 9 have ends that are angled from the side memory location of the contact rollers 6, the axial force is converted into radial directed to the contact rollers 6, whereby reliability is obtained and electrical connection with simultaneous sealing (from vneschnego pressure). The roller 6 can rotate on its axis 7, which is necessary due to the relative movement of the roller 6 and the passage contact 5 when the upper tube is seated on the end, when the radial forces on the roller 6 can reach significant forces. Thus, the electric circuit, when composed of a column of telemetry pipes 1, is formed by a feedthrough contact 5 at the lower end of the lower pipe, a conductor 14, a feedthrough contact 5 at the upper end of the lower pipe, the lower contact roller 6 of the electric contact clutch, axis 7, connecting bar 8, axis. 7 upper contact roller 6, roller 6, continuous contact 5 at the lower end of the upper tube, etc.

Technical and economic efficiency of the proposed device. is to reduce the time to work associated with the descent, drilling and receiving information on the communication channel.

Claims (5)

1. Telemetry drill string, including couplings and a power line with electrical contact nodes, characterized in that, in order to expand the range of information obtained by providing multi-channel communication, as well as improving the reliability of electrical contact connections, the electrical contact node is made in the form of pass-through insulators and an electrocontact coupling installed at the pipe ends, the coupling sleeves being made with slots and annular grooves for axle clips movement, and the ends of the pipes have surfaces in response to them. 2. The telemetry column according to claim 1, stating that the retainer for the axial movement of the slit coupling is executed in the form of a helix from a rectangular rod. 3. Telemetry column in PP. i and 2, characterized in that, when executing pipes made of alloyed material in the groove for the axial movement retainer, the BvvieHo reinforcing ring is installed. 4. The telemetry column according to claim 1, wherein the electrocontact coupling is made in the form of a pipe made of elastic material, which has bevels on the ends and is reinforced by rollers paired with the plate, and the pipe has pressure rings installed at the ends, which have a counter surface that is connected to the pipe bevel the middle part of it is a steel sleeve with sealing elements on the outer side. 5. Telemetry column in PP. 1-4, characterized in that the latches of the axial movement of the slit coupling have means for their installation in the working position. Sources of information taken into account in the examination 1.Patent of France No. 1244440, cl. E 21 B, 1963. 2. The author's testimony of USSR No. 874957, cl. E 21 B 17/00, 1978. 4 i6 .17 t fig.g Fig.Z.