TEST TUBE WITH AN INLET FOR FILLING WITH FLUID AND EXPELLING AIR, AND WITH ENHANCED RESISTANCE AND SEALING FOR THE BOP TESTING STEP IN DRILLING SYSTEMS

Abstract

Fluid tube for sealing test in the BOP chamber. The test tube (1) used in the BOP chamber (C) resistance test step has its hollow structure filled internally and totally through a fluid (F) input (4). Thereby, wrapped by closing the drawers (G), after injection in the test fluid chamber (C), due to the filling fluid volume (F) internally and resulting air exhaustion into the hollow structure, the zest tube obtains a supplementary structure resistance against the pressure applied within the chamber (C), preventing unwanted distortions. The tube obtains an effective sealing due to the filling fluid volume (F) that exhausts the air within it, stopped internally with the couplings of the screwed pin (3) threads and the female thread (R) of the plug (TA) or test plug, preventing the test fluid into the chamber (C) to leak and enter its hollow structure. Therefore, the supplementary structure anti-distortion system, air absence inside the tube and test tube stoppage system avoid false pressure relieve into the chamber (C) to the sensors distributed therein, not detecting false leakages, making the BOP resistance analysis against potential oil/gas leakages precise during the probing procedure.

Claims

1. A test tube with fluid-filling input comprised from a hollow-structure test tube (1), used in the resistance test step of the chamber (C) formed over the passage (T) initially drilled in the ground, between the drill shaft head (P) and the retractable drawers (G) of BOP (Blow Out prevention system), in gas/oil probing procedures. The said test tube (1), generally equipped with a screwed upper terminal (2) and lower screwed pin (3), known for having a fluid input (4) with outer nozzle (5) in its upper edge, right below the said upper terminal (2), followed by an inner channel (6) which presents a connecting duct (7) inside its tubular hollow body.

2. A test tube with fluid-filling input according to claim 1, after being screwed normally by its lower screwed pin (3) in the female thread (R) of the cap (TA) in the chamber (C) housing (A) of BOP and closing the drawers (G), known for test tube that is filled internally and completely by the filling fluid (F), which is introduced through a hose (M) of a fluid recipient attached to the nozzle (%) of its fluid input (4), entering by the channel (6) and through the duct (7), considered as the filling fluid volume (F), stopped together with the screw thread of its lower screwed pin (3) with the female thread (R) of the cap (TA)test plug.

3. AIR EXHAUSTION, RESISTANCE INCREASE AND SEALING IN THE BOP TEST STEP IN PROBING SYSTEMS, according to claim 1 after injecting the test fluid for the resistance test step and BOP leakage in its chamber (C), known for the filling fluid volume (F) within the test tube (1), as it exhausts the air and give its tubular structure the structural resistance against distortions and, by the said filling fluid volume (F) to be filled and stopped internally with the coupling between the screwed pin (3) screw threads and the female thread (R) of the cap (TA)test plug, resulting in an effective sealing in such point.

Description

[0014] The picture 1 sequence below describes the technical status and the problems occurred during the test analysis, due to the detection of false leakages inside BOP chamber, as a result of air presence into the tube, the test tube distortion and test fluid input through the screw thread inside its hollow structure.

[0015] Picture 1sequential view which shows, in 1A, the conical plug insertion inside the conical housing in the spot briefly drilled in the ground, at the shaft head. In 1B, it shows the insertion through BOP drawers, in the test tube, screwed by the screwed pin in the test plug female thread. In 1C, it shows the BOP drawers closing, wrapping the test tube structure intermediate part that is kept inside the chamber, formed in the drill shaft head. In 1D, it shows the test fluid injection within the chamber. In expanded details, at the side it is shown that the test tube hollow structure is deformed while undergoing through high pressure in the chamber. It also shows that the fluid escapes through the test tube screwed pin threads and the plug female thread, entering and accumulating inside the hollow structure.

[0016] The pictures below, from 2 to 12, show the adaptation in the test tube and to the anti-distortion system and sealing that wraps it:

[0017] Picture 2perspective view of the test tube, showing the upper screwed terminal, the adaptation formed by the fluid input and, on the lower edge, its screwed pin. In such view, A-A section is indicated;

[0018] Picture 3A-A section;

[0019] Picture 4Details A, which shows the test tube upper edge, adapting its fluid input and the lower edge with its screwed pin;

[0020] Picture 5diagram view that shows the test tube, adapted with its fluid input, as it is inserted through the open BOP drawers;

[0021] Picture 6view according to previous picture, which shows the test tube screwed by its screwed pin, in the plug test female thread of the drill shaft head housing;

[0022] Picture 7view according to previous picture, which shows closed BOP drawers, wrapping the test tube structure inside the chamber, exposing its upper edge with the fluid input in the platform;

[0023] Picture 8view according to previous picture, showing that the test tube had its hollow structure filled with the fluid up to its lower edge, as said fluid was stopped within along with the screwed threads to the plug female thread;

[0024] Picture 9view according to previous picture, it shows the test tube already filled with the fluid, as it starts the BOP pressure and resistance test, with the fluid injection test in the chamber;

[0025] Picture 10view according to previous picture, it shows the chamber already filled for the resistance test;

[0026] Picture 11view according to previous picture, which shows the test tube hollow structure under high pressure in the chamber without distortions, in B details expanded at the side. It also shows that the test fluid being injected under high pressure within the chamber does not enter through the screwed pin threads and by the plug female thread, not entering within the test tube consequently.

[0027] In compliance to the attached drawings, the TEST TUBE WITH FLUID-FILLING INPUT FOR AIR EXHAUSTION, RESISTANCE INCREASE AND SEALING IN THE BOP TEST STEP IN PROBING SYSTEMS, object of the patent of invention request hereof, it consists of the test tube (1), of a structure used in the chamber (C) resistance test step, formed over the the passage (T) initially drilled in the ground, between the drill shaft head (P) and the retractable drawers (G) of BOP (Blow Out prevention system), in gas/oil probing procedures, as shown in picture 1 sequence.

[0028] The said test tube (1), generally equipped with a screwed upper terminal (2) and lower screwed pin (3), presenting a new feature for the project, as shown in pictures 2, 3 and 4, receives in its upper edge, immediately below the said upper terminal (2), a fluid input (4) with an outer nozzle (5) followed by an inner channel (6) fitted with a connecting duct (7) inside the hollow tubular structure.

[0029] With such new development, the test tube (1) is screwed normally by its lower screwed pin (3) in the female thread (R) of the plug (TA) of the BOP chamber (C) housing (A), as shown in pictures 5 and 6, then the drawers (G) are closed. In this condition, the test tube (1) structure inside the chamber (C) is wrapped by closing the drawers (G), then receiving the hose coupling (M) through the fluid input (4) nozzle (5) of a filling fluid recipient (not shown), as picture 7 shows.

[0030] As picture 8 shows, the filling fluid (F) enters through the channel (6), exhausting all air within and, through the duct (7) it fills internally and totally the test tube (1) hollow structure, as such volume is stopped along with the screwed threads of the lower screwed pin (3) and its female thread (R) of the plug (TA).