RU2577050C1 - Device for installation of devices on external surface of tubing - Google Patents

Abstract

FIELD: oil industry.

SUBSTANCE: invention relates to oil and gas production, namely to devices for installation of bottom-hole instruments onto oil-well tubing (TBG), for example, for obtaining information on parameters of fluid in annular space of well by lowered self-contained measuring instruments or for fluid sampling in borehole by lowered self-contained sampler. Device contains container fitted and secured on pipe for inside arrangement of self-contained bottom-hole instruments. Container is made in form of case on the outer surface of the section of TBG with the coupling, standard size of the section of TBG directed towards increase of diameter relative to standard size of main string. On external surface main production string coupling is threaded, coupled with inner thread of coupling section of tubing string.

EFFECT: device reliability is increased, equal strength and corrosion resistance of pipe string body is maintained, manufacturing is simplified.

1 cl, 2 dwg, 1 tbl

Description

The invention relates to oil and gas production, and in particular to devices for installing downhole tools on tubing (tubing), for example, to obtain information about the parameters of the fluid in the annular space of the well launched self-contained measuring devices or for sampling fluid in the annular space of the well launched self-contained sampler .

A device is known for installing devices on the outer surface of a pipe (RF patent No. 143434, E21B 47/01, 07/20/2014), comprising a container fixed to the pipe by welding with autonomous measuring devices placed inside it; the container is a sector of a pipe of smaller diameter with a length greater than the installed device. Holes at the ends of the container, drilled at an angle other than 90 degrees to the axis of the elevator pipes for installing the mounting bolts, prevent spontaneous flipping of the nut. The device is not effective enough due to the unreliability of fastening the container to the pipe by welding and bolts, causing a violation of the equal strength of the tubing body and corrosion of the metal at the attachment points, especially when working in an aggressive environment. There is a possibility of cutting bolts in case of jamming of the device in the well.

The prototype is a device for installing devices on the outer surface of the pipe (RF patent No. 119390, E21B 47/01, 08/20/2012), containing a container fixed to the pipe with autonomous measuring instruments placed inside it, characterized in that the container has a through longitudinal hole for putting on the pipe, made eccentrically relative to the axis of the container, and through radial holes for fixing on the pipe with bolts, while in the container wall from the side of the through longitudinal hole is made laterally e window, and stand-alone measuring devices are placed in grooves made inside the container opposite the side window.

The prototype device is not effective enough. Its disadvantages include the high complexity of manufacturing a metal from a monolith of metal, as well as insufficient reliability due to the method of fixing the device to the surface of the tubing with bolts, which causes point deformation and point stress of the tubing string and, accordingly, violation of the equal strength of the body of the tubing pipe. Also, the device is not reliable enough due to the probability of cutting bolts in case of jamming in the well and the likelihood of metal corrosion at the attachment points, especially when working in an aggressive environment.

The problem to be solved and the expected technical result are to increase the efficiency of the device by increasing its reliability by attaching the device to a tubing pipe coupling with a standard oil gauge thread and, accordingly, by maintaining the equal strength and corrosion resistance of the tubing pipe body, while simplifying and cheap manufacturing.

The problem is solved in that the proposed device for installing devices on the outer surface of the tubing - tubing containing a worn and fixed container on the pipe for placement of autonomous deep instruments inside it, is characterized in that the container is made in the form of a pencil case on the outer surface of the tubing section with a sleeve, the size of the tubing cut next to increase the diameter relative to the size of the main tubing string, the thread is made on the outer surface of the coupling of the main tubing string mating with the internal thread of the tubing cut sleeve.

The device diagram is illustrated by figures 1 and 2, where:

1 - well casing

2 - the main string of tubing

3 - a piece of tubing with the following size in the direction of increasing diameter relative to the size of the main tubing string

4 - tubing cut sleeve

5 - coupling of the main tubing string

6 - thread on the outer surface of the sleeve 5 of the main tubing string, mating with the internal thread of the sleeve 4 of the tubing 3

7 - pencil case

8 - stand-alone deep tool

9 - reflectors

10 - holes for mounting pin

11 - holes for communicating annular space with the internal cavity of the pencil case

12 - a longitudinal slot for the installation of autonomous deep instruments 8 in the pencil case 7

13 - mounting check.

A piece of tubing 3 with a sleeve 4 is taken, a longitudinal slot 12 is milled in the segment, which is closed from above by a pencil case 7 by welding; at the ends of the case 7, reflectors 9 are welded. The case 7 has openings 11 for communicating the annular space with the internal cavity of the case. In case 7, through the slot 12 from the inside of the tubing section 3, an autonomous deep tool 8 is installed and fixed through the holes 10 with a mounting pin 13 for the duration of installation of the device on the main tubing string 2. For mounting the device on the outer surface of the main tubing string 2, the tubing cut 3 (with a pre-installed in the case 7, an autonomous deep tool 8, fixed with a mounting pin 13 through holes 10) with a sleeve 4, is put on the pipe of the main tubing string 2 with a sleeve 5.

Since the size of the tubing section 3 is next in the direction of increasing the diameter relative to the size of the main tubing string 2, and on the outer surface of the coupling 5 of the main tubing string 2, thread 6 is made that is mated to the internal thread of the coupling 4 of the tubing 3 segment, the tubing section 3 with the coupling 4 is screwed and thus fixed to the pipe of the main tubing string 2 with the sleeve 5, after which the mounting pin 13 is removed.

Reflectors 9 minimize possible mechanical effects on the pencil case 7 in the well during tripping.

Applicant authors have established that the existing tubing assortment GOST 633 - 63 (80) (Appendix 1 - a summary table for pipes) is necessary and sufficient to create an effective, reliable, simple and cheap device for installing instruments on the outer surface of the tubing, while maintaining equal strength and corrosion resistance of the tubing pipe body.

The tubing assortment GOST 633 - 63 (80) implies the use of tapered self-sealing threads, both domestic types of threads of the NK type and their foreign counterparts of the VAM type can be used.

According to the claimed invention, for example, for mounting the device on the outer surface of the main tubing string 2 with a diameter of 48 mm (outer diameter 48.3 mm, wall thickness 4 mm; inner diameter 40.3 mm; outer diameter of the coupling 5-56 mm) with a diameter of 60 mm (outer diameter 60.3 mm, wall thickness 5 mm; inner diameter 50.3 mm) (with a self-contained depth device 8 pre-installed in the case 7) with a sleeve 4 (outer diameter of the sleeve 4-73 mm) put on the pipe the main tubing string 2 with the coupling 5 (outer diameter of the coupling 5-56 mm).

Since the size of the tubing section 3 is the next one in the direction of increasing the diameter relative to the size of the main tubing string 2, and on the outer surface of the sleeve 5 (outer diameter of the coupling 5-56 mm) of the main tubing string 2, thread 6 is made, mating with the internal thread of the sleeve 4 (outer diameter couplings 4-73 mm) of the tubing section 3, the tubing section 3 with the coupling 4 (outer diameter of the coupling 4-73 mm) is screwed and thus secured to the pipe of the main tubing string 2 with the coupling 5 (outer diameter of the coupling 5-56 mm). Namely, the coupling 4 (outer diameter of the coupling 4-73 mm) is screwed onto the coupling 5 (outer diameter of the coupling 5-56 mm) of the main tubing string 2.

Or, for example, for mounting the device on the outer surface of the main string of tubing 2 with a diameter of 60 mm (outer diameter 60.3 mm, wall thickness 5 mm; inner diameter 50.3 mm; outer diameter of the sleeve 5-73 mm) a piece of tubing 3 with a diameter of 73 mm (outer diameter 73 mm, wall thickness 5.5 mm; inner diameter 62 mm) (with a self-contained depth device 8 pre-installed in the case 7) with a sleeve 4 (outer diameter of the sleeve 4-89 mm) are put on the pipe of the main tubing string 2 with coupling 5 (outer diameter of the coupling 5-73 mm).

Since the size of the tubing section 3 is next in the direction of increasing the diameter relative to the size of the main string of the tubing 2, and on the outer surface of the sleeve 5 (outer diameter of the sleeve 5-73 mm) of the main string of the tubing 2, thread 6 is made, mating with the internal thread of the sleeve 4 (outer diameter couplings 4-89 mm) of the tubing string 3, the tubing segment 3 with the coupling 4 (outer diameter of the coupling 4-89 mm) is screwed and thus secured to the pipe of the main tubing string 2 with the coupling 5 (outer diameter of the coupling 5-73 mm). Namely, the coupling 4 (outer diameter of the coupling 4-89 mm) is screwed onto the coupling 5 (outer diameter of the coupling 5-73 mm) of the main tubing string 2.

Thus, using the existing tubing assortment, it was possible to create an effective, reliable, simple and cheap device for installing instruments on the outer surface of the tubing, while maintaining the equal strength and corrosion resistance of the tubing pipe body.

Claims (1)

A device for installing devices on the outer surface of the tubing - tubing, containing a worn and fixed container on the pipe for placement of autonomous deep instruments inside it, characterized in that the container is made in the form of a pencil case on the outer surface of the tubing section with a sleeve, and the length of the cut is used The tubing is next in the direction of increasing the diameter relative to the size of the main tubing string; on the outer surface of the coupling of the main tubing string, a thread is mated to the internal thread of the tubing You are a piece of tubing.

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