RU2369713C1 - Upper power drive of drilling rig - Google Patents

Abstract

FIELD: oil and gas production.

SUBSTANCE: invention refers to drilling rigs of oil wells and can be implemented in suspended drilling rigs with upper drive of drilling tube rotation used for drilling operations at oil and gas wells including horizontal and deviating drilling. The upper power drive of the drilling rig consists of a power swivel with a hydro-motor in pass-through modification, a slider, and a guiding beam installed inside a support and made in form of three folding and movable relative to each other sections - a lower, middle and upper one arranged pivotally and rotating to 180°. The lower section is connected with the power swivel by means of the slider and with a lower section of the support by means of a lower power belt and a rest; while the upper section of the said beam is secured on a movable telescopic upper section of the support.

EFFECT: increased reliability, convenience in operation, and reduced time of assembly-disassembly of structure.

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Description

The invention relates to oil drilling rigs and can be used in overhead drilling rigs with top drive rotation of drill pipes used for drilling in oil and gas wells, including horizontal and directional drilling.

Known top power drive drilling rig (VSP) (RU 2237790, ЕВВ 19/00, ЕВВ 3/00, 2003.11.11). It contains a swivel with a rotation drive mounted on a guide carriage, a swivel deviation mechanism from the center axis of the well, a drill pipe feed mechanism, a swivel rotation drive made in the form of a coaxially mounted high-torque hydraulic motor and a disc hydraulic brake mounted on it, the hydraulic motor and brake housings being rigidly connected between each other and are located in the lower part of the swivel housing, the rotor of the hydraulic motor and the brake shaft are hollow and mounted on the output hollow shaft of the swivel a bore hole is made in the lower part of the swivel housing, inside of which the output hollow shaft is mounted on the bearings, and the internal radial bearing bearings of the hydraulic motor rotor are simultaneously the upper support of the swivel output shaft.

Known top power drive (VSP) installation horizontal drilling of oil wells (RU 29551, ЕВВ 19/00, ЕВВ 3/00, 2003.07.13). It contains a power swivel with a guide carriage mounted on the drive rails, a mechanism for deviating the power swivel from the axis of the center of the well, a feed mechanism for drill pipes and characterized in that the mechanism for deviating the power swivel from the axis of the center of the well in the transverse direction is made in the form of a leverage of a parallelogram mechanism, mounted on the guide carriage, and is additionally equipped with two power hydraulic cylinders located in parallel and connected on one side with the guide carriage, and with ugoy - with a base parallelogram mechanism, the feeding mechanism is further provided with a drill pipe elevator link tilt assembly, made in the form of two hydraulic cylinders disposed between the swivel and an elevator link, the latter being movably mounted on the drilling zone.

The known decision was made as a prototype. Its disadvantages include the following. The swivel deflection mechanism, which is a parallelogram mechanism, folds when disassembled and is located along the mast outside. This creates inconvenience during transportation, breakdowns may occur, weight and overall dimensions increase.

In addition, the drive guide beam is assembled in a single unit from separate sections, and then attached to the mast by suspension and attachment units for a long time, increasing overhead.

The tasks to which the invention is directed are to increase the reliability, ease of use, reduce the time of assembly-disassembly of the structure.

The tasks are solved as follows.

The upper power drive of the drilling rig contains a power swivel with a hydraulic motor in a straight through version, a slider, a guide beam and is characterized in that the guide beam is installed inside the mast and is made in the form of three sections, folding and movable relative to each other - lower, middle and upper, mounted pivotally with the possibility of rotation through 180 °, and the lower section by means of a slider connected to a power swivel and by means of a power belt and an abutment to the lower section of the mast, and the upper section of said beam is fixed sliding on the movable upper mast section.

The invention is illustrated by drawings.

Figures 1 and 1a show a side view of the guide beam and power swivel, figure 2 shows the slider in the working position, figure 3 and 3a shows the beginning of folding and unfolding the guide beam of the power swivel, and figure 4 shows the guide beam of the power swivel in the folded position, FIGS. 5 and 5a show the power swivel guide beam in the retracted position, and FIG. 6 show the mast in the folded position with the power swivel guide beam retracted inward.

VSP contains a slider and a power swivel. The slider is a guide device mounted on a guide beam associated with the swivel. The mast consists of lower 1 and upper 2 sections. A power swivel 4 is suspended from the hook block 3. The guide beam consists of three sections: lower 5, middle 6, upper 7. By means of the upper suspension belt 8 and the middle support belt 9, it is secured to the upper mast section 2, and by means of the lower power belt 10 to lower mast section. The lower section 5 of the guide is attached to the swivel 4.

The guide beam is designed to provide vertical movement of the slider of the power swivel 4 by raising and lowering the tackle block, as well as the perception of reactive torque from the power swivel. It is a three-section (5, 6, 7) articulated structure made of a square pipe 160 × 100 mm, fixed in a folded position using the upper suspension belt 8 and the middle support belt 9 inside the mast extension section. The dimensions of the guide beam in the folded state (6500 × 300 × 160) do not interfere with the telescoping of the upper mast in the working and transport positions.

Two hinged nodes provide, with the help of an auxiliary winch, a turn of the middle section 6 of the guide beam relative to the upper 7 and lower 5 sections by 180 ° and the sections are rigidly fixed in the deployed (working) position with 2 fingers. The length of the guide beam in the deployed position is 16800 mm.

Mounting schemes on the mast with the help of belts and deployment of the guide beam in the working position are shown in Fig.3. At the same time, the upper belt is designed to absorb the weight of the load from the guide beam, the middle belt - to absorb loads in the longitudinal plane of symmetry of the control unit, the lower belt - to "dampen" the reactive moment from the power swivel.

The minimum number of manual operations (fixing-unlocking with the fingers of the middle and lower sections of the guide beam and lower power belt) provides the minimum preparation time for the power swivel.

For safety and convenience of installation and dismantling work, sections of the guide beam are provided with sling units.

Claims (1)

The upper power drive of the drilling rig, comprising a power swivel with a hydraulic motor in a straight through version, a slider, a guide beam, characterized in that the guide beam is installed inside the mast and is made in the form of three folding and movable relative to each other sections - lower, middle and upper, mounted pivotally with the possibility of rotation through 180 °, and the lower section by means of a slider connected to the power swivel and by means of the lower power belt and stop to the lower mast section, and the upper section of the said balk fixed to the upper movable retractable mast section.

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