SUPPORT WITH LIMITING COLLAR FOR CASING STRING, FOR LOCKING BY ABUTMENT ABOVE THE MANDREL OF THE DRILLING EQUIPMENT

Abstract

To lock the coating column to the probing equipment chuck. The equipment consists of a support (1) used between the probing equipment hoist and the coating tube column (for gas/oil shaft cementing). Prior to its threaded nozzle (5), the support (1) gets a collar (6) with a diameter bigger that the probing equipment chuck (M) opening radius. When the chuck cylindrical bracket (M) is opened, for inserting or removing the coating column (R) along with the drilling shaft (PO), in case of probing hoist cable (CA) breakage, as an example, the sudden lowering of a coating column inside the shaft (PO) is prevented by the collar (6) locking over the chuck (M) open cylindrical support in a stopper system. This way, expensive and time-consuming procedures for recovering coating columns (R) from the gas/oil probe drilling shaft (PO) bottom are avoided.

Claims

1) SUPPORT WITH DELIMITING COLLAR FOR A COATING COLUMN, comprised of a support (1) used during the assembly, lifting and lowering of coating tubes (T) of the coating column (R), fixed or free to/from the chuck (M) cylindrical bracket (M), on the gas/oil probing equipment platform, along with the drilling shaft (PO), as said support (1) equipped with an eyelet (2) in its upper part (3), from which extends its tubular structure (4) that has a lower inner threaded nozzle (5), characterized by said support (1), incorporating, before the threaded nozzle (5), a stress (7) staggered collar (6).

2) SUPPORT WITH DELIMITING COLLAR FOR A COATING COLUMN, according to claim 1, characterized by the support (1) collar (6) dimensioned with a diameter bigger than the chuck (M) cylindrical support opening radius in the probing equipment.

3) LOCKING THE STOPPER SYSTEM ABOVE THE PROBING EQUIPMENT CHUCK, according to claims 1 and 2, after assembling the coating tube column (T), as the support (1) is attached to the probe hoist cable (CA) by a hook (G) and the coating column (R) is fixed by the chuck cylindrical bracket (M), while opening the latter and as said coating column (R) is lifted to be inserted or removed from the shaft (PO), in case of breakages, avoiding sudden lowering, characterized by the collar (6) locking over the chuck (M) cylindrical support, in a stopper system.

Description

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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. [0033] 1 QHSE [0034] 1.1 Wear the complete PPE for operations within the area; [0035] 1.2 Make a work risk evaluation, when necessary; [0036] 1.3 Open a work permit (PT), when necessary; [0037] 1.4 Wear a safety belt while working at high heights; [0038] 1.5 While checking unsafe operations or conditions, suspend the work; [0039] 1.6 Isolate the area while moving loads, carrying out hot working. Pressure tests etc.; [0040] 1.7 If you have any doubts about such works, call a safety technician or consult a supervisor. [0041] 2 Initial Inspection [0042] 2.1 Ensure the wear bushing is recovered while concluding the drilling operation, after removing the column from the shaft (SDS-PROC-PI-002Wear Bushing Installation and Uninstalling). Remember the blind compartment shall be closed between operations in order to keep the shaft safety; [0043] 2.2 Ensure 4 tube compartment is replaced by 3 tube compartments, and after replacing it, carry out BOP full or partial test, depending on the last test date, following the procedure SDS-PROC-PI-001BOP Test; [0044] 2.3 Have a tally promptly, prepared by Operator's Company Man, assuring the coating is duly jigged before lowering it in the shaft; [0045] 2.4 Provide the platform with all equipment and procedures needed to lower the coating. [0046] 3 Tools needed for lowering 3.1 Bucking machine; [0047] 3.2 Monkey wrench; [0048] 3.3 Spinning wrench with Torque wrench; [0049] 3.4 Hammer; [0050] 3.5 Special lubricant for coating; 3.6 Steel brush and lime; [0051] 3.7 Spinning Head: 3 DEThread 2NW CX3FJL VAM Pin5000 psi Spinning Head 3 DEThread 2 NW Pin3FJL VAM Box5000 psi. 3.8 Spinning Head 4 DEThread 2 NW5000 psi and Spinning Head 3 DEThread 2 NW5000 psi; [0052] 3.8 Lifting Coating Sub 3 VAM TOPThread 3 FJL VAM Box and Lifting Coating Sub 3 VAM TOPThread 3 FJL VAM Pin5000 psi; [0053] 3.9 Let Down Tube 3 DEThread 3 HRQ Pin3 HRQ Box5000 psi, Crossing Sub 4 DEThread 3 HRQ Pin3 EUE Box5000 psi, Crossing Sub 4 DEThread 3 EUE Pin3 HRQ Box5000 psi; [0054] 3.10 Steel-cable coating lifter; 3.11 Scrambler for 30 tons; [0055] 3.12 A coating joint Pin VAM FJL 3Pin VAM FJL 3; [0056] 3.13 Manual wedge set with clamping jaws 3; 3.14 Araldite for flats and float collars (if needed); [0057] 3.15 Centralizers for coating of 3 (in a shaft of 4). [0058] 3.16 Coating jig with drift of 2,797; [0059] 3.17 Coating lifter with a diameter of 7 1/16. [0060] 4 Coating lowering procedure [0061] 4.1 Move all accessories and tools to the rig floor, such as spinning heads, coating lifter, spinning wrenches, torque wrenches, lubricants, oils etc; [0062] 4.2 Open the blind compartment to lower coating; [0063] 4.3 Coatings of 3 with 9.2 lb/ft (13.69 kg/m) may be placed longitudinally regarding the probing length and shall be positioned in the headframe beside the tube slope, to raise them with a probe hoist and pipe handler. Ends with female threads VAM FJL shall be turned to the platform. Promptly have the Lifting Sub, with male thread VAM FJL. It shall not exceed an OD of 3; [0064] 4.4 Install the manual wedge set under the opened foot clamp; [0065] 4.5 Remove the spinning head upper part; [0066] 4.6 Replace the clamping jaw set of 3 in the hydraulic chuck and foot clamp of Genesis Probe. Install 3 guide sleeves of 3: on top and on the base of the drill head and on top of the foot clamp. Remove the buses and lower the leather cap in the front and lower part of the probe rod, allowing the view of thread coupling; [0067] 4.7 By using two monkey wrenches (24) or spinning wrenches, previously screw Lifting Subs described in items 3.9, available in coatings, according to tally. Screw Lifting Subs as much as possible. [0068] 5 First step from 0 to 1500 m (hoist capacity of 40 klb or 18 ton); [0069] 5.1 The coating lowering shall be started with an open chuck; [0070] 5.2 With a hydraulic headframe beside the rod slope, lift the first coating joint with the connected Lifting Sub; [0071] 5.3 With a probe hoist already prepared with the lifter and cable scrambler (30 tons), raise the tube of 3 and put it into the hole; [0072] 5.4 With a bucking machine, torque the connection between Lifting Sub and coating. [0073] 5.5 Still with the hoist, lift the joint and place it over the shaft, with its (female) connection over the foot clamp; [0074] 5.6 Close the foot clamp, open the lifter and by using the bucking machine, break the connection torque with the Lifting Sub; [0075] 5.7 With a hydraulic headframe beside the rod slope, lift the next coating tube of 3 with the connected Lifting Sub; [0076] 5.8 With a probe hoist already prepared with the lifter and cable scrambler (30 tons), raise the tube of 3 and put it into the hole; [0077] 5.9 With a bucking machine, torque the connection between Lifting Sub and coating. [0078] 5.10 Raise the coating joint form the hole, placing it over the foot clamp, which is closed, holding the coating joint weight already lowered, leaving a coupling space to the bucking machine; [0079] 5.11 Move the bucking machine, placing it between the coating joints; Still with a probe hoist, lower the coating smoothly inside the bucking machine, place the tube male thread FJL within the female thread, starting the first manual screw or with the help of a monkey wrench.