RU184280U1 - DEVICE FOR DRILLING THE CLUTCH OF HYDRAULIC PLASTING OF THE FORM IN THE Tails OF OPERATING COLUMNS OF OIL AND GAS EXTRACTION WELLS OF DIAMETER - Google Patents

Abstract

The utility model relates to drilling equipment and can be used in the shanks of production strings already in drilled and commissioned wells throughout lateral branches, as well as in complicated areas. The technical result of the utility model is: - the possibility of lowering the drilling equipment immediately on a string of muffless pipes; -the ability to organize a better flushing of the stem of the shank from drilling products; -the possibility of reducing the risks of sticking the layout accumulating in the usual x cases for SBT couplings (GOST R 50278-92) with sludge; -reduction of the risk of configuration jamming at the places of drilled hydraulic fracturing couplings due to ensuring a uniform diameter of the bottom of the column due to the use of drill rods in which there are no SBT locks, i.e. . an equal outer diameter of the arrangement is provided which is smaller than the diameter of the destructive tool (it provides the effect of using an expensive CT complex). This technical result is achieved due to the fact that a device is declared for drilling hydraulic fracturing couplings in the shanks of oil-and-gas producing wells of the bottom hole engine and milling armament, equipment to prevent hydraulic sticking, on which are installed downhole drill strings having locking joints at the ends for connecting to each other, characterized in that the drill strings are made in the form of bezmuftovyh rods, each locking connection of the borehole drill string is bezmuftovoe, and the attachment of the bottom well-boring drill string with equipment to prevent hydraulic sticking the basis of the threaded connection corresponding to the thread of the drill string.

Description

The utility model refers to the drilling equipment and can be used in the shanks of the production strings already in the drilled and commissioned wells throughout the lateral branches, as well as in complicated areas.

A device is known for drilling on expandable pipes for local fastening of wells for simultaneous opening (RU173662U, publ .: 05.09.2017.), Subsequent fixing of unstable rocks and further drilling without tripping, including a bit connected in series with a sliding expander creating a nominal diameter the wellbore when drilling under the diameter of the expanded pipes in the expanded position and shifting to the diameter of the bit during the reverse passage of the assembly through the expanded pipes, with a bottom hole gambler, with equipment for local mounting of the well (OLKS) with a “core” installed inside - a column of small diameter drill-free drill pipes or tubing, reducing axial and torsional loads on the OLKS, with equipment for distributing OLKS, represented by punches or another flare, undocked during creation axial load for supplying equipment for distribution for complete straightening of corrugations of expanded pipes and docking with a downhole motor after distribution with subsequent disconnection of the layout for drilling from installed section of expanded tubes.

A technical problem of the known solution is that the device in it relates to drilling and only for complicated sections of lateral branches in the intervals of unstable rocks. The prototype no-duct pipe is used only for activation - equipment for local mounting of wells (OLKS - corrugated mandrels) and simply excludes carrying out a separate lowering and lifting operation for its installation on a complicated section, respectively, requires the installation of an OLX, the use of a calibrating tool, the installation of a sliding expander.

In addition, in the device (RU173662U), the installation principle of a smooth couplingless pipe is “pipe in pipe”, i.e. inside the layout of the drill coupling pipes or inside the OLX.

The closest analogue is a downhole screw motor [https://neftegaz.ru/tech_library/view/2607-Vintovye-zaboynye-dvigateli-VZD], publ .: 10.29.2016., Which describes a device for drilling of hydraulic fracturing couplings, including screw downhole motor 4 and milling armament.

For clarity, this known construction is shown in FIG.

The shank of the drilling rig contains equipment for preventing hydraulic claws 3, over which borehole drill strings 1 with couplings 2 are installed, having coupling locks 5 at the ends for connecting to each other.

The technical problems of the prototype are many problems:

1. As the wells are equipped with small-diameter shanks with hydraulic fracturing couplings, scale, proppant, sand and other mechanical impurities settle in the shank.

2. This circumstance reduces the production capabilities of wells. Drilling of hydraulic fracturing couplings with the involvement of installations of a flexible continuous pipe of the Coil-Tubing complex (hereinafter referred to as CT) does not allow at the usual approach to milling hydraulic fracturing couplings with a diameter of more than 68-74 mm, which further creates the need for additional work by well workover teams and shanks of wells and the risks of their loss from the exportation fund. When MGRP is drilled with conventional VZD-76 on a conventional steel drill pipe (GOST R 50278-92), the probability of sticking and leaving the layout of the PDM with tubing in a small diameter shank is high, since the rate of removal of the drilling products is not high during operation of such a downhole motor, but the drilling products themselves accumulate behind the SBT (steel drill pipe) couplings, which leads to sticking of the assembly and the occurrence of an accident and the risk of losing a well. Each year, the stock of wells equipped with horizontal shanks grows. The number of mechanical impurities that clog up the shanks in these wells is increasing. The oil producing enterprise does not have the opportunity to fully explore the liners, equipped with hydraulic fracturing couplings, conducts repeated hydraulic fracturing, water insulation, SCR in them.

3. It is also important that the work with the involvement of coiled tubing installations is quite expensive, there are not so many high-quality contractors with free capacities on the market, which causes additional downtime of wells waiting for the coiled tubing team.

4. Drilling of hydraulic fracturing couplings installed in small-diameter shanks is supposed to be performed by specialized cutters of abrasive action on the Drill Rod (a clutch-free drill pipe (according to GOST 7909-56)) to prevent the formation of large particles and their sediments on the drill pipe couplings on which the destructed tools and equipment that can lead to sticking the layout in the shank.

5. For rotation, a specialized milling cutter (MF) it is planned to use small-sized VZD - the use of small-sized VZD allows (F60-73 mm.), In case of leaving the VZD in the shank, catch with a standard fishing tool with grips of 60 and 73 mm. The use of high-flow drive VZD makes it possible to obtain high power on the drive shaft of a VDD - up to 25-28 kW, which is comparable to the power of conventional VZD-105. Increased fluid flow allows you to organize better washing of the stem of the shank from drilling products. The use of drill rods (smooth drill pipes with inward-set ends according to GOST 7909-56) with a diameter of 63.5 mm reduces the risk of sticking to the assembly of sludge accumulating in normal cases behind the SBT couplings. The entire arrangement is additionally scrolled from the mouth with a power swivel or a mechanical rotor, to prevent sludge from settling in the lower generatrix of the shank, continuously raising the sludge into the upper forming the shank and carrying the sludge out with the fluid flow at the wellhead.

The task of the utility model is to eliminate the above disadvantages inherent in all known solutions.

The technical result of the utility model is:

-the possibility of lowering the drilling equipment directly to the column of coupling pipes;

-the ability to organize better washing of the stem of the shank from drilling products;

-the possibility of reducing the risk of sticking to the assembly of sludge accumulating in usual cases behind the SBT couplings (GOST R 50278-92);

-reduction of the risk of jamming of the assembly in the places of drilled hydraulic fracturing sleeves due to ensuring uniform diameter of the bottom of the column due to the use of drill rods in which there are no shoulders of SBT locks, i.e. an equal outer diameter of the arrangement is provided which is smaller than the diameter of the destructive instrument (the effect is ensured both from the use of an expensive CT complex).

This technical result is achieved due to the fact that the claimed device for drilling hydraulic fracturing sleeves in the shanks of the production columns of oil and gas wells of small diameter, including a screw downhole motor and milling armament, equipment to prevent hydraulic sticking, above which are installed well drill strings having ends locking joints for connecting with each other, characterized in that the drill strings are made in the form of bezmuftovyh rods, p Each locking connection of the borehole drill string is sleeveless, and the mounting of the lower borehole drill string with equipment to prevent hydraulic sticking is made on the basis of the threaded joint corresponding to the thread of the drill string.

Brief Description of the Drawings

Figure 1 shows the known known bottom hole assembly arrangement.

Figure 2 shows the claimed layout of the bottom of the drill string.

Figure 3 shows the principle of operation of the drill string.

In the drawings: 1 - pipe body, 2 - pipe coupling, 3 - equipment to prevent sticking (hydraulic IASS or oscillator), 4 - screw downhole motor and milling armament, 5 - coupling lock, 6 - lock without coupling pipes, 7 - threaded connection , 8 - clutch-free rod, 9 - adapter from the borehole drill pipe to the drill rod, 10 - the main production string of the well, 11 - wellhead equipment, 12 - working fluid supply from the pumps for the OVD operation, 13 - carried out mechanical particles of drilled hydraulic fracturing couplings, 14 - drilled tail coupling ovika, 15 - undrilled coupling of hydraulic rupture of the shank, 16 - ball for activating the coupling of the shank, 17 - output of the working fluid with removal of drilled elements.

Implementation of the utility model

The utility model is a tail element of the drill string, and includes a downhole motor and milling armament 4, equipment to prevent hydraulic claws 3, over which borehole strings are installed, having locking connections at the ends for connecting to each other.

New is that the drill strings are made in the form of bezmuftovyh rods 8 (see Figure 2), with each locking connection 6 of the borehole drill string bezofuftovoy, and the attachment of the lower borehole drill string with equipment to prevent hydraulic sticking made on the basis of the threaded connection corresponding the thread of the drill string 7.

In case of application of the proposed liner arrangement of the production casing, there is no or significantly reduced the risk of wedging of the assembly in the places of drilled hydraulic fracturing clutches due to ensuring a uniform diameter of the bottom of the casing assembly due to the use of drill rods in which there are no SBT locks, i.e. an equal outer diameter of the arrangement is provided which is smaller than the diameter of the destructive instrument (the effect is ensured both from the use of an expensive CT complex).

The use of a smooth pipe (a smooth drill pipe according to GOST 7909-56) allowed the use of a compact high-power downhole screw motor with a high flow rate.

The applicant carried out work on two wells, obtained an economic effect and reduced the time cycle for the production of these works by 30%.

Drilling of hydraulic fracturing couplings installed in small-diameter shanks was carried out by specialized cutters of abrasive action (see Figure 3), on a clutch-free drill pipe in the form of a rod 8 (according to GOST 7909-56) to prevent the formation of large carried out particles 13 and their sediments on the drill pipe couplings , in which destructive tools and equipment were lowered into the well, which can lead to sticking of the assembly in the shank.

When the layout of the shank of the production well (see Figure 3), the connection of the borehole drill pipe 1 of the main production string 10 with the drill rod 8 is made through the adapter 9.

In the upper part of the main production string 10, wellhead equipment 11 with a pump (not shown) is placed, by means of which the working fluid 12 is supplied for operating the PDM.

The production well shank operates using standard hydraulic fracturing couplings 14, which are activated by means of a ball 16 to activate the shank sleeve.

Under the action of fluid pressure, which rests on undrilled clutch 15, the working fluid 17 comes out and the drilled elements are carried out to the outside of the well along the tailing and main drilling 10 columns.

For rotation, a specialized milling cutter (MF) was used compact VZD (diameter 73 and 60 mm) high power - up to 25-28 kilowatts. The use of small-sized PDM allows, in the case of leaving the PDM in the shank, catch the standard fishing tool with grips of 60 and 73 mm. The use of high-flow drive VZD makes it possible to obtain high power on the drive shaft of a VDD - up to 25-28 kW, which is comparable to the power of conventional VZD-105. Increased fluid flow allows you to organize better washing of the stem of the shank from drilling products. The use of smooth drill pipes (with inward-set ends according to GOST 7909-56) with a diameter of 63.5 mm allows reducing the risks of sticking the assembly of sludge accumulating in usual cases behind the SBT couplings (GOST R 50278-92). The entire arrangement of drill pipes is additionally scrolled from the mouth of a power swivel or a mechanical rotor to prevent sludge from settling in the lower forming shank, constantly raising the sludge to the upper forming of the shank, and carrying the sludge out of the fluid flow to the wellhead.

To ensure high-quality flushing of the shank during the drilling process, a high-capacity pump unit is used to ensure the flushing fluid flow rate of up to 40 l / s and smooth gear shifting with a 9-stage gearbox.

Claims (1)

A device for drilling hydraulic fracturing sleeves in the shanks of production columns of oil and gas producing wells of small diameter, including a downhole motor and milling armament, equipment for preventing hydraulic sticking, above which borehole strings are installed, having locking joints at the ends, differing from each other that the drill strings are made in the form of couplingless rods, each lock connection of the well drill string howling and lower fastening downhole drill string with the equipment for preventing hydraulic sticking performed based on a threaded joint according to the thread of the drill string.

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