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 a BOP chamber. The test tube used in the BOP chamber resistance test step has its hollow structure filled internally and totally through a fluid input. The tube obtains an effective sealing due to the filling fluid volume that exhausts the air within it, stopped internally with the couplings of screwed pin threads and a female thread of a plug or test plug, preventing the test fluid into the chamber to leak and enter the hollow structure of the chamber. The supplementary structure anti-distortion system including air absence inside the tube and test tube stoppage the system avoids false pressure into the chamber 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 comprising a hollow-structure test tube having a tubular hollow body configured to be used in a resistance test step of a chamber formed over a passage initially drilled in ground, between a drill shaft head and retractable drawers of a Blow Out Prevention system (BOP) in gas/oil probing procedures, said hollow-structure test tube being equipped with a screwed upper terminal and a lower screwed pin, the hollow-structure test tube having a fluid input in an upper edge, the fluid input having an outer nozzle the fluid input being right below the upper terminal followed by an inner channel which presents a connecting duct inside the tubular hollow body of the hollow-structure test tube, wherein after injecting the test fluid for the resistance test step and BOP leakage in the chamber filling fluid volume within the test tube while air is exhausted, thereby the test tube is provided with tubular structure structural resistance against distortions.

2. The test tube with fluid-filling input according to claim 1, wherein the hollow-structure test tube is configured to be screwed by the lower screwed pin in a female thread of a cap in the chamber of housing and the retractable drawers of the BOP are configured to be closed, and the test tube is filled internally and completely by a filling fluid which is introduced through a hose of a fluid recipient attached to the outer nozzle of the fluid input, entering by the inner channel and through the connecting duct, a filling fluid volume of the fluid in the, in the hollow-structure test tube being stopped with a screw thread of the lower screwed pin with the female thread of a cap.

3. according to claim 1 wherein the filling fluid volume being filled and stopped internally with the coupling between the screw threads of the lower screwed pin and the female thread of the cap resulting in an effective sealing.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIGS. 1A-D are a sequence describing the test analysis,

(2) FIG. 2 is a perspective view of the test tube,

(3) FIG. 3 is the A-A section of FIG. 2,

(4) FIG. 4 is detail A from FIG. 3,

(5) FIG. 5 shows the test tube as it is inserted through BOP drawers,

(6) FIG. 6 shows the test tube screwed into the drill shaft head housing,

(7) FIG. 7 shows the closed BOP drawers wrapping the test tube structure inside the chamber,

(8) FIG. 8 shows the test tube hollow structure filled with fluid up to its lower edge,

(9) FIG. 9 shows the test tube filled for the resistance test,

(10) FIG. 10 shows the chamber filled for the resistance test,

(11) FIG. 11 shows the test tube hollow structure with detail B expanded at the side.

(12) The FIG. 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.

(13) FIG. 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.

(14) The figures below, from 2 to 12, show the adaptation in the test tube and to the anti-distortion system and sealing that wraps it:

(15) FIG. 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;

(16) FIG. 3A-A section;

(17) FIG. 4Details A, which shows the test tube upper edge, adapting its fluid input and the lower edge with its screwed pin;

(18) FIG. 5diagram view that shows the test tube, adapted with its fluid input, as it is inserted through the open BOP drawers;

(19) FIG. 6view according to previous figure, which shows the test tube screwed by its screwed pin, in the plug test female thread of the drill shaft head housing;

(20) FIG. 7view according to previous figure, which shows closed BOP drawers, wrapping the test tube structure inside the chamber, exposing its upper edge with the fluid input in the platform;

(21) FIG. 8view according to previous figure, 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;

(22) FIG. 9view according to previous figure, 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;

(23) FIG. 10view according to previous figure, it shows the chamber already filled for the resistance test;

(24) FIG. 11view according to previous figure, 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.

(25) 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 FIG. 1 sequence.

(26) 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 FIGS. 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.

(27) 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 FIGS. 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 FIG. 7 shows.

(28) As FIG. 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).