Patent Application
20170089151
The descriptive report hereof refers to a patent of invention request for a collar adapted in the lifting support (up/down) of a coating column, which was developed to allow a system to prevent the drop of coating tubes mounted inside the drilling shaft during its insertion and removal, and if needed, with the help of the oil/gas probing equipment lifting system.
By the proposed system, in case of probe main hoist cable rupture, if the mounted coating assembly start to drop loose inside the shaft, the lifting support collar, due to its dimensioning, shall form a stopper locking over the chuck open brackets of the probing equipment, preventing the sudden drop and thus avoiding additional rescue procedures (hook methods) of said tools in this coating and cementing drop phase.
As it is known, in probing systems to extract gas/oil, there should be used a set of drilling rods in a column-like assembly that spin alongside its chaplet drill or drill, drilling the ground gradually.
For instance, the patent document PI 0010106-0 so-called “DEVICE FOR HANDLING DRILLING RODS”, may be mentioned, which was requested in Apr. 4, 2000, making the positioning and alignment of rods together with the drilling column easier.
Anyhow, over the drilling process, the shaft wall must be coated and cemented in all individual places, as it is hindrance-free so the drill may go through safely. For such, in this coating and cementing phase, it is used a column called coating column (consists of threaded tubes between its ends, with threaded boxes and pins of a male-female system).
The rod assembly, the ones which comprise the coating column is made from a bracket with an eyelet, a connector receptor of a cable linked to the probe lifting system, along with the probing platform. The bracket is screwed to the threaded pin of the first tube through its threaded nozzle, which is lead by the probe hoist to the chuck that is already installed into the platform, aligned to the shaft head. After this tube is locked by chuck brackets and as its tubular structure is already partially inserted inside the shaft, the bracket is then unscrewed. In the platform, such bracket is screwed to the threaded pin of a following tube, which is lead and its threaded box is screwed to the threaded pin of the first tube that is already fixed to the chuck. After screwing on tube to another (between threaded box and pin), chuck brackets are opened so the column may be formed, now “loose”, and may be lowered inside the shaft by the probe hoist for cementing the void gap between the shaft wall, and then the procedure is repeated continuously according to the program as long as the shaft is deepened.
At that moment, the entire column weight is supported by the bracket eyelet, by the lowering and lifting system cable of the probe column.
In such condition, the big weight applied by the column may break the cable or the eyelet itself in case of material defaults, resulting in the tubular coating column drop already assembled and lowered inside the shaft, which surpass the bracket-opened chuck as it drops within the shaft. This occurrence, clearly undesirable, results in interruptions on this coating phase, requiring the set to be “rescued” by using specific hooking method equipment in the gas/oil shaft, then it can be detrimental and time-consuming in probing operations.
This support suffers an adaptation, purpose of such patent request, which shall be caused by stopper system locking against the chuck cylindrical bracket, if the cable or eyelet breaks (of said support) in the moment the tube set is lifted, then positioned by the probe hoist to be lowered down inside the shaft.
In a superficial explanation, the support goes through its new structure and the system enveloping it, which shall be better detailed by the drawings attached.
Picture 1 extracted from document PI 0010106-0 represents the abovementioned technique status, showing a device to help drilling and probing equipment. Such assembly is formed by a spin head set due to a swinging arm, cylindrical bracket with limited opening and closing, which comprises an elongated support and rod clips. Through such assembly, the drill rods are transported from a power structure to an operation initial start and they are aligned to the drilling column, as they are threaded and inserted for the drilling operation.
The pictures below, from 2 to 15, are related to said patent request:
Picture 2—support perspective view, from its threaded nozzle fro screwing the coating rod threaded pin and, alongside it, a view from the cable hook receptor eyelet, connected to the probe hoist. In such view, section A-A is indicated;
Picture 3—support section A-A;
Pictures 4 and 5—section A-A, as it shows before and after being screwed by its threaded nozzle to the coating tube threaded pin;
Picture 6—perspective view, as it shows the support screwed to the coating tube column;
Picture 7—perspective view showing the support coupled by its eyelet, by the hook connected to the probe hoist cable;
Picture 8—section A-A, as it shows the tube coupled to the support, directed at the chuck, on the shaft head;
Picture 9—section A-A, as it shows the tube positioned by the probe hoist, locked by the chuck cylindrical bracket and exposing its threaded pin;
Picture 10—section A-A, as it shows a following tube aligned to its threaded box, screwed to the coating tube threaded pin, which is already locked to the chuck cylindrical bracket;
Picture 11—section A-A, as it shows a following tube already screwed to its threaded box on the first tube threaded pin. As it is known, after threading other tubes, the coating column is formed, as the shaft is deepened;
Picture 12—section A-A, as it shows the chuck with its cylindrical bracket locking the coating tube column. Alongside it, detail A;
Picture 13—section A-A, as it shows the open cylindrical bracket to insert the coating column, which, in this condition, is still lifted by the probe hoist;
Picture 14—section A-A, as it shows the cable connected to the probe has broken, and as the chuck cylindrical bracket is open, the column will surpass them and suddenly drop inside the shaft;
Picture 15—section A-A, as it shows that after coming across the support collar, the chuck cylindrical bracket locks the entire coating column in the stopper system, preventing the said assembled coating tube column to fall inside the shaft.
According to the attached drawings, the “SUPPORT WITH A DELIMITING COLLAR FOR A COATING COLUMN, FOR LOCKING THE STOPPER SYSTEM ABOVE THE PROBING EQUIPMENT CHUCK”, purpose of such patent of invention request, is comprised of a support (1) with an eyelet (2) on its upper part (3), from which the tubular structure comes from (4), as before the threaded nozzle (5), it incorporates a stress (7) staggered collar (6), as show in pictures 2 and 3.
This way, the support (1) may provide a new safety system when it assembles, lifts/lowers the coating tube assembly (T), comprised of threaded pins (P) and boxes (C) that comprise the coating column (R). That column (R) is used in the cementing phase of the void gap between the coating and drilling shaft wall (PO), with gas/oil probe equipment.
As it is shown in picture 4, by its threaded nozzle (5), such support (1) is aligned, then as picture 5 shows, it is threaded to the threaded pin (P) of a first tube (T), as it is shown in picture 6. Afterwards, as shown in picture 7, by the eyelet (2), the support (1) gets the hook (G) inserted, which is connected to the probe hoist (not shown) cable (CA), from which said tube (T) is directed towards to, as picture 8 shows, in the platform and fixed by the chuck cylindrical bracket (M) of the probing equipment, along with the shaft (PO). The chuck (M) cylindrical bracket is closed, enveloping and locking the first tube (T) with the tubular structure partially inserted in the shaft (PO), aligned to expose its threaded pin (P), as picture 9 shows.
The support (1) is then removed and threaded to a following tube (T1), whose threaded box (C) is aligned to the threaded pin (P) of the first tube (T), as picture 10 shows, to screw them both, as picture 11 shows. In this condition, the assembled tubes and that form the coating column (R), are locked by the chuck (M) cylindrical bracket, as picture 12 details show.
During the time the assembled tubes set is inserted to the shaft (PO), the chuck (M) cylindrical bracket is opened and said coating column remains lifted by the probe hoist cable (CA), whose hook (G) is fixed to the support (1) eyelet (2), as shown in picture 13. In this condition, due to the coating column (R) weight, e.g.: if the probe hoist cable (CA) breaks, as picture 14 shows, and the tube set starts to fall suddenly (freely) in the shaft (PO), the drop course is immediately interrupted when the collar (6), as its diameter is bigger than the chuck (M) cylindrical bracket open radius, it is locked over them, in a stopper system, as picture 15 and the expanded detail B show.
Thus the coating column (R) does not fall inside the shaft (PO), as it is supported on the chuck (M) cylindrical bracket, which may be closed again to take actions.
A sequence of operational procedures is listed below for the production coating lowering. The indicated technical specifications in English are used in all national territory and, therefore, are kept in this patent request.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/BR2013/000545 | 12/5/2013 | WO | 00 |
