Telemetric system sound bottom support

FIELD: oil-and-gas industry.

SUBSTANCE: telemetric system sound bottom support includes a bottom sub, an electric module protected jacket and a centraliser. At that the centraliser executed as two co-axial elements with radial connections in between. The centralisers internal element is elongated in comparison with an external one, and in the centralisers internal element top part executed a blind hole along its axis, where an elastic element installed, made of non-magnetic material. The elastic element made of titanium or non-magnetic steel, or bronze, or metal rubber, or rubber.

EFFECT: sound bottom support parts lifetime increase, assembly simplification and its reliability increase, the support spare parts and its assembling work content decrease.

4 cl, 1 dwg

 

The invention relates to the field of geophysical research and can be used in telemetry systems for mounting the electronic module.

Known lower bearing probe telemetry system, which includes the protective cover of the electronic module, plug protective cover, made in the form of a sleeve with external and internal thread, in which the set screw. On the protective cover of the electronic module is installed centralizer, is a hollow cylinder with Windows for the passage of drilling fluid, separated from each other by bridges. The centralizer is connected with the lower sub threaded connection. Tube protective cover locks the position of the electronic module inside the casing and seals the protective cover and the clamp locks the position of the electronic module with protective cover inside the bottom of the sub (the patent for useful model №52101, IPC 7 EV 47/12, Appl. 2005).

In design there are two zones through which drilling fluid can flow into the protective cover of the electronic module: connection of the screw - nut inside the tube and the connection sleeve tube - protective casing of the electronic module.

A significant drawback of the design is intensive hydroabrasive wear on the bottom of the sub and the centralizer due to the impact of abrasive particles contained in the mud races of the thief, on the lintel of the centralizer. In the location of the centralizer decreases the area of the orifice increases the speed and changing the direction of fluid flow, eddies are formed. The turbulence increases. Especially the rapid wear of the sub and the centralizer is observed when drilling in the conductor, as at this stage the drilling fluid contains sand and particle species, and the flush fluid flow maximum. As shown, the usual resource of the lower sub is about 300 hours.

Objectives of the invention are increasing the life of parts of the lower support probe, simplifying the design and increasing its reliability.

The problem is solved in that the lower support of the probe telemetry system, including the lower sub, the protective cover of the electronic module and the centralizer, the centralizer is made in the form of two coaxial elements with radial ridges between them, while the inner element of the centralizer is lengthened compared to the outside, and in the upper part of the inner element of the centralizer on its axis made a blind hole, which has an elastic element of a nonmagnetic material. The elastic element can be made of titanium, non-magnetic steel, bronze-metal or rubber. The inner element of the centralizer has a conical surface at the top and bottom h is s.

The drawing shows the lower bearing of the transmitter telemetry system.

The lower bearing of the transmitter telemetry system contains the bottom sub 1, which is an electronic module 2 in the protective cover 3 and the clamp 4. The clamp 4 is made in the form of two coaxial elements 5 and 6 with a radial crosspieces 7 between them and connected with the lower sub 1 threaded connection. The inner element 5 of the centralizer is lengthened in comparison with the outer 6. The lower portion of the element 5 is a flow has a conical surface 8 for a smooth change its direction. The upper portion of the element 5 has a conical surface 9 for centering the electronic module in a protective cover relative to the bottom of the sub 1. The inner element 5 of the centralizer has a cylindrical surface 10 for radial fixing and a flange 11 for axial fixation of the protective casing. Along the axis of the element 5 is made blind hole 12, which has an elastic element 13, the locking position of the electronic module in a protective cover.

The elastic element is made of a nonmagnetic material, such as titanium, non-magnetic steel, bronze-metal, rubber, etc.

In the zones of connection with the lower centralizer sub and clamp with protective cover electronic module installed sealing ring 14.

The Assembly of the probe ensures the in the following sequence.

Insert the electronic module 2 in the protective cover 3. In the hole 12 of the centralizer 5 put the elastic element 13. Insert the clamp 4 in the bottom sub 1, and the conical surface 9 of the upper part of element 5 allows to center the cover of the electronic module relative to the bottom of the sub. With tightness twist the centralizer in the bottom sub to clamping flange 11 with the end of the casing 3.

The advantages of the proposed technical solutions:

1. Simplified design of the lower support tube: the centralizer, in addition to its direct function, the function of the tube - holds the electronic module inside the protective casing and seals the protective sleeve.

2. An increased resource of the foot by reducing the degree of impact of the stream on the centralizer due to the smooth change of direction of drilling mud on the conical surface of the centralizer.

3. Improved reliability of sealing the protective cover of the electronic module. The probability of seal failure decreased by reducing the number of zones of possible penetration of the drilling fluid inside the protective cover of the electronic module.

1. The lower bearing of the transmitter telemetry system, including the lower sub, the protective cover of the electronic module and the centralizer, wherein the centralizer is made in the form of two coaxial the elements with radial ridges between them, the internal element of the centralizer is lengthened compared to the outside, and in the upper part of the inner element of the centralizer on its axis made a blind hole, which has an elastic element of a nonmagnetic material.

2. The lower bearing of the transmitter according to claim 1, characterized in that the elastic element is made of titanium, or non-magnetic steel, or bronze, or-metal, or rubber.

3. The lower bearing of the transmitter according to claim 1, characterized in that the upper part of the inner element of the centralizer has a conical shape.

4. The lower bearing of the transmitter according to claim 1, characterized in that the lower part of the inner element of the centralizer has a conical surface.



 

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3 dwg

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9 cl, 9 dwg

Downhole chamber // 2371566

FIELD: oil-and-gas production.

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EFFECT: reliability enhancement of operation of downhole chamber.

4 cl, 4 dwg

FIELD: mining engineering.

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4 cl, 8 dwg

FIELD: mining.

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EFFECT: increased reliability of logging equipment delivery on horizontal section of well owing to elimination of logging cable twisting.

9 cl, 8 dwg

FIELD: oil and gas production.

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EFFECT: facilitates simplification of design of facility, increased reliability of its operation and expanded functionality.

5 cl, 2 dwg

Anchor // 2361059

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry, particularly to anchors designed for adhesion with walls of well and for further transmitting of well equipment forces onto them. It is the technical purpose of the invention to increase reliability of the design and to facilitate possibility to install the anchor in a well both by the method of rotation of flow string and by the method of axial displacement of flow string depending upon incline of sections of the surveyed well. The anchor consists of a rod with stops, of a rigidly secured to the rod adaptor with a cone and slots, of wedging screw-thread dies designed to travel relative to the cone and interacting with a pusher, of a mounted on the rod friction lantern equipped with braking planks, and of a movable shaped lock in form of a ratchet bushing and a branch with responsive ratchet teeth on a lower end and with inclined slits on its side surface for interacting with pins of the friction lantern. The braking planks of the friction lantern are made on external surface with teeth lugs at angle φ to lengthwise axis; the rod is equipped with inclined slots made at angle to one another and united with a horizontal slot; also the branch is spring loaded relative to a case of the lantern, while the inclined slits on side surface of the branch turn into horizontal ones.

EFFECT: increased reliability of design and facilitating possibility to install anchor in well both by method of rotation of flow string and by method of axial displacement of flow string depending upon incline of sections of surveyed well.

5 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes selection of cable of required rigidity and fixing devices on it. Transporting of devices into well is performed under effect from weight of cable and devices. Cable also contains inner hermetic pipe, which is plugged on both sides prior to lowering cable into well. Liquid is pumped into pipe under pressure through locking valve in upper plug and is kept in pipe under constant pressure during operation. After that cable is lowered with devices fixed to it. Value of pressure of liquid in pipe is determined from formula Ppipe≥ Pwell(Scable/Spipe-1)-QcablexLcable/Spipe<Ptear, where Ppipe - pressure of fluid in pipe, kg-wt/sm2; Scable - cross-section of cable with pipe, sm2; Pwell - hydrostatic pressure of well liquid column at depth of planned delivery of devices on cable, kg-wt/sm2; Spipe - cross-section area of pipe aperture and plug area equal to it in contact with liquid in pipe, sm; Qcable - weight of 1 km of cable with pipe, kg-wt; Lcable - length of cable to depth of planned delivery of devices, km; Ptear - pressure of liquid in pipe leading to tear of cable, kg-wt/sm2, determined from formula: Ptear=Ftear/Spipe, where Ftear - tear force for cable according to documentation, kg-wt.

EFFECT: higher efficiency.

3 cl, 1 dwg, 1 tbl

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