RU2258807C2 - Sampling device - Google Patents

Abstract

FIELD: oil field equipment, particularly for take samples from wellhead, namely for integrated sampling multi-component gas-liquid medium transported through pipelines.

SUBSTANCE: device has hollow body built in pressure pipeline and formed as a part of the pipeline located on vertical part of wellhead fittings. Multi-component gas-liquid medium flow control unit is made as a gate connected to rotary support shaft. Sampling chamber is created as annular cavity arranged on hollow body at gate level. Sampling chamber inlet is communicated with multi-component gas-liquid medium flow through intake manifolds formed on hollow body. Intake manifolds are side slots arranged symmetrically about gate axis of rotation. Sampling chamber outlet is communicated with shutoff member installed on rotary gate support shaft extension. Shutoff member includes seat, hold-down screw and ball contacting with the seat and embedded in pressure screw end.

EFFECT: simplified structure and increased sampling quality.

2 dwg

Description

The invention relates to oilfield equipment for sampling for analysis at the wellhead and can be used for integrated sampling of multicomponent gas-liquid systems transported through pipelines.

A sampling device is known (patent RU 2151290 G1) containing a hollow body installed in the wellhead system. Inside which is located the control element for the flow of a multicomponent gas-liquid medium, equipped with sealing elements and a control handle, a selective chamber with intake channels, a locking member with a control handle and a guide tube.

A disadvantage of the known sampling device (hereinafter the device) is the design complexity, which increases its cost and operating costs. In addition, the device is installed on a horizontally located section of the pressure pipe of the wellhead fittings, where the multicomponent gas-liquid mixture manages to separate (settle) to some extent, which negatively affects the integral sampling and leads to unreliable results of the analysis of the samples. The technical problem solved by the invention is to simplify the design of the device and improve the quality of sampling of a multicomponent gas-liquid medium.

The problem is solved in that the hollow body is a fragment of the pressure pipe in a vertically located section of the wellhead fittings, the flow control body of the multicomponent gas-liquid medium is made in the form of a damper connected to the shaft of the rotary support, the selected chamber is an annular cavity on the hollow body, located at the flap level and communicated at the inlet with the flow of a multicomponent gas-liquid medium through intake channels made on the hollow body in the form of side rezey disposed symmetrically flap rotation axis, and the output - a locking body mounted on the shaft extension of the rotational damper bearing.

Figure 1 shows a section of a sampling device along the line BB in figure 2; figure 2 is a section along the line aa in figure 1.

The hollow body 1 (Fig. 1) is a fragment of a pressure pipe in a vertically located section of wellhead fittings (not shown). Inside the hollow body 1, there is a control element for the flow of a multicomponent gas-liquid medium in the form of a damper 2 connected to the shaft 3 of the rotary support, for example, in electric arc welding. The selection chamber in the form of an annular cavity 4 is made in the boss 5 welded to the hollow body 1. The annular cavity 4 is communicated at the inlet with the flow of a multicomponent gas-liquid medium through intake channels made on the hollow body 1 in the form of side slots 6 (Fig. 2) located symmetrically to the axis of rotation of the shutter 2, and at the output - a locking element mounted on the continuation of the shaft of the rotary support, shaft 3, shutter 2.

The locking element consists of a saddle 7 connected to the boss 5 on one side and the housing 8 of the locking device on the other. At the end of the clamping screw 9 with the control handle 10, a ball 11 is mounted in contact with the seat 7. The housing 8 is equipped with a guide pipe 12. On the side opposite from the locking device there is a rotational support of the shutter 2, which (support) consists of holes in the hollow body 1 and the housing 13 of the rotary support of the shutter 2, made under the shaft 3 of the shutter 2. In the housing 13 of the rotary support of the shutter 2 there is a gland 14 with a ground box 15 and a clamping nut 16. At the end of the shaft 3 there is a handle 17 (Fig. 1), depicted by the dot-dash line minutes corresponding dampers 18 inoperative position 2. The diameter of the valve 2 less than the inner diameter of the hollow body 1, on which a multi-component liquid mixture flows. This allows the sampling in the closed position of the shutter 2 (Fig. 1) to maintain a certain flow of a multicomponent gas-liquid mixture due to the annular gap 19 formed between the hollow body 1 and the shutter 2 (Fig. 2), practically without violating the ratio of the components of the gas-liquid mixture. A complete closure of the shutter 2 would lead to the accumulation of light fractions in front of the shutter, and as a result to a violation of the proportional selection of all components contained in the process stream.

To take a sample of a multicomponent gas-liquid mixture, it is necessary to turn the valve 2 by turning the handle 17 ° by 90 ° (Fig. 1) and immediately open the locking element by rotating the control knob 10. The selected sample along the side slots 6 enters the annular groove 4, the locking device and through the guide tube 12 into a storage tank (not shown). At the end of sampling, the locking device is closed using the control handle 10, the shutter 2 opens and moves to position 18, which corresponds to the position of the handle 17.

To ensure guaranteed proportional selection of all components contained in the process stream of a multicomponent gas-liquid mixture, it is necessary that during sampling, the damper 2 intensively opens or closes, thereby ensuring forced mixing of the sample material.

The implementation of the proposed sampling device leads to a simplification of the design and improve the quality of sampling.

Claims (1)

A sampling device for the integral sampling of a multicomponent gas-liquid medium, containing a hollow body installed in the pressure pipe of the wellhead fittings, inside which there is a body for controlling the flow of a multicomponent gas-liquid medium on the shaft of the rotary support with stuffing box packing, a sampling chamber with intake channels, a shutoff member with a control handle and a guide tube, characterized in that the hollow body is a fragment of the pressure pipe to vertically In the corresponding section of the wellhead fittings, the flow control body of the multicomponent gas-liquid medium is made in the form of a damper connected to the shaft of the rotary support, the selective chamber is an annular cavity on the hollow body located at the level of the damper and communicated at the inlet with the flow of the multicomponent gas-liquid medium through the intake channels, made on the hollow body in the form of side slots located symmetrically to the axis of rotation of the damper, and at the exit with a locking member mounted on the continuation of the rotary shaft Yelnia flap support, wherein the blocking member consists of a saddle, the pressing screw and in contact with the bead seat unit built on the end of the pressing screw.

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