CN109577885B - Drill rod connecting or drilling rod throwing device - Google Patents

Abstract

The invention relates to a drill rod receiving or throwing device which comprises a lower base, a stand column arranged on the lower base and an upper seat plate arranged at the top of the stand column, wherein drill rod holes into which drill rods can extend are formed in the upper seat plate and the stand column along the length direction, a plurality of upper reinforcing ribs are arranged between the upper seat plate and the stand column, the upper reinforcing ribs, the stand column and the lower base can be arranged in mounting holes of a wellhead turntable bushing, and the outer dimension of the upper seat plate is larger than the diameter dimension of the mounting holes of the wellhead turntable bushing. The device for receiving or throwing the drill rod can be directly arranged in the wellhead turntable core to receive or throwing the drill rod, improves the traditional process for receiving or throwing the drill rod, does not need the working procedures of sitting slips and lifting slips, reduces the working intensity of field operators, reduces the working safety risk and improves the working efficiency.

Description

Drill rod connecting or drilling rod throwing device

Technical Field

The invention relates to the technical field of oil and gas well drilling and repair, and more specifically to a drill rod connecting or drilling rod throwing device.

Background Art

In the drilling and repair process system, the operations of connecting drill pipes and throwing drill pipes (removing drill pipes) are indispensable and need to be carried out as soon as possible. The method of connecting/throwing drill pipes generally used in the industry is the slip type. This operation method requires at least one slip lift and slip sit operation for each drill pipe connected, and the number of drill pipes connected is determined according to the drilling depth (taking a well depth of 4000m as an example, about 400 drill pipes need to be pre-connected, and at least 800 slip lifts and slip sits are required in total, not including typhoon avoidance and subsequent recovery of connecting and throwing drill pipes). From a safety perspective, wellhead workers work at the wellhead for a long time, with high labor intensity. Repeated lifting and sitting of heavy slips can easily cause waist injuries and the risk of hand pinching; in addition, the operation efficiency is relatively low. Therefore, it is necessary to further improve the operation method and improve the operation efficiency.

Summary of the invention

The technical problem to be solved by the present invention is to provide an improved drill rod receiving or drill rod throwing device in view of the above-mentioned defects of the prior art.

The technical solution adopted by the present invention to solve its technical problems is: constructing a drill rod connecting or drilling rod throwing device, which includes a lower base, a column installed on the lower base, and an upper seat plate installed on the top of the column. The upper seat plate and the column are provided with drill rod holes for the drill rod to be inserted along the length direction. A plurality of upper reinforcing ribs are provided between the upper seat plate and the column. The upper reinforcing ribs, the column and the lower base can be built into the mounting hole of the wellhead turntable core. The outer dimension of the upper seat plate is larger than the diameter dimension of the mounting hole on the wellhead turntable core.

In some embodiments, the upper seat plate, the upper reinforcement ribs, the columns, and the lower base are all made of steel materials with a thickness of about 25-30 mm; the columns, the upper seat plate, and the lower base, as well as the upper reinforcement ribs, the columns, and the upper seat plate are all fixed by welding.

In some embodiments, the upper seat plate is a square plate with an arc shape, and the outer dimensions of the upper seat plate are about 600 mm in length and about 600 mm in width.

In some embodiments, the plurality of upper reinforcing ribs include at least four upper reinforcing ribs, and the at least four upper reinforcing ribs are evenly distributed along the circumference of the column; the top of the upper reinforcing rib fits in the mounting hole of the wellhead turntable core, and the upper reinforcing rib is roughly a right-angled triangle, a right-angled trapezoid, or a fan-shaped plate structure, and one side of the upper reinforcing rib is welded and fixed to the top outer wall of the column, and the other side is welded and fixed to the bottom of the upper seat plate.

In some embodiments, the diameter of the drill rod hole is more than 1.2 times the outer diameter of the drill rod joint, and the depth of the drill rod hole is about 9.5-10m.

In some embodiments, the depth of the drill rod hole is slightly smaller than the length of the drill rod so that the drill rod joint is exposed outside the drill rod hole; or the depth of the drill rod hole is not less than the length of the drill rod, and a gasket is provided at the bottom of the drill rod hole so that the drill rod joint is exposed outside the drill rod hole.

In some embodiments, the column is provided with a lifting short section to adjust the depth of the drill rod hole.

In some embodiments, the column is a cylindrical structure with openings at both ends, the lower base is a hollow hemispherical or cylindrical structure, and the outer diameter of the lower base is the same as the outer diameter of the column; a blind plate is provided between the column and the lower base, and the blind plate constitutes the bottom of the drill rod hole; and a plurality of lower reinforcing ribs are provided between the blind plate and the lower base.

In some embodiments, the blind plate and the lower reinforcement rib are both made of steel plate structure with a thickness of about 25-30 mm; the blind plate is welded and fixed to the bottom inner wall of the column, one side of the lower reinforcement rib is welded and fixed to the inner wall of the lower base, and the other side is welded and fixed to the bottom of the blind plate.

In some embodiments, the plurality of lower reinforcing ribs include three lower reinforcing ribs, and the three lower reinforcing ribs are evenly distributed along the circumference of the lower base.

The implementation of the drill rod connecting or drill rod throwing device of the present invention has at least the following beneficial effects: the drill rod connecting or drill rod throwing device of the present invention can be directly built into the wellhead rotary table bushing to perform drill rod connecting or drill rod throwing operations, thereby improving the traditional drill rod connecting or drill rod throwing process, reducing the sitting and lifting cava processes, thereby significantly reducing the work intensity of on-site operators, reducing operational safety risks, and improving the operational efficiency of drill rod connecting or drill rod throwing; in addition, the drill rod connecting or drill rod throwing device can be manufactured using existing old casings, which can meet the needs of on-site operations, save resources, and realize the recycling of waste materials.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

FIG1 is a schematic cross-sectional view of a drill rod connecting or drilling rod throwing device in some embodiments of the present invention;

Fig. 2 is a schematic diagram of the A-A cross-sectional structure of a drill rod connecting or drilling rod throwing device in some embodiments of the present invention;

FIG3 is a schematic diagram of the structure of a drill rod receiving or drill rod throwing device in some embodiments of the present invention when in operation.

DETAILED DESCRIPTION

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

Fig. 1-2 shows a drill rod receiving or drill rod throwing device in some embodiments of the present invention, which can be directly built into the wellhead rotary core 8 to perform drill rod receiving or drill rod throwing operations. The drill rod receiving or drill rod throwing device includes a lower base 3, a column 2 installed on the lower base 3, and an upper seat plate 1 installed on the top of the column 2. The upper seat plate 1 and the column 2 are provided with drill rod holes 7 for the drill rod 9 to extend into along the length direction. A plurality of upper reinforcing ribs 4 are provided between the upper seat plate 1 and the column 2 to ensure the strength of the upper part of the drill rod receiving or drill rod throwing device and prevent the upper seat plate 1 from being separated from the column 2. The upper reinforcing ribs 4, the column 2 and the lower base 3 can be built into the mounting hole 81 of the wellhead rotary core 8, and the outer size of the upper seat plate 1 is larger than the diameter size of the mounting hole 81 on the wellhead rotary core 8.

The diameter of the drill rod hole 7 is larger than the outer diameter of the drill rod joint 91 of the drill rod 9, so as to facilitate the insertion of the drill rod 9. In some embodiments, the diameter of the drill rod hole 7 is more than 1.2 times the outer diameter of the drill rod joint 91. The depth of the drill rod hole 7 is generally slightly smaller than the length of the drill rod 9, so that the drill rod joint 91 can be exposed outside the drill rod hole 7, which is convenient for the disconnection of the drill rod 9. The depth of the drill rod hole 7 may also be not less than the length of the drill rod 9. When in use, some pads (not shown) can be added to the bottom of the drill rod hole 7 as needed, so that the drill rod joint 91 can be exposed outside the drill rod hole 7. In order to meet the needs of disconnection of drill rods of different lengths, the depth of the drill rod hole 7 should be long rather than short during design. Usually, the depth of the drill rod hole 7 can be designed to be about 9.5-10m, which can meet the disconnection needs of most drill rods of different lengths. The column 2 can also be provided with a lifting short section, so that the depth of the drill rod hole 7 can be flexibly adjusted as needed.

As shown in FIG2 , in some embodiments, the upper seat plate 1 can be a square plate with an arc shape to reduce safety risks. The outer dimensions of the upper seat plate 1 are slightly larger than the diameter of the mounting hole 81 on the wellhead rotary bushing 8, and its outer dimensions can usually be designed to be about 600 mm long and about 600 mm wide. It can be understood that in other embodiments, the upper seat plate 1 can also be a circular plate or a rectangular plate with an arc shape or other shapes.

As shown in Fig. 1, the column 2 can be a cylindrical structure with two ends open, and the column 2 can be fixed to the upper seat plate 1 and the lower base 3 by welding. In actual use, the column 2 can be made of existing old casing to save resources.

The plurality of upper reinforcing ribs 4 are evenly distributed on the top outer wall of the column 2 along the circumferential direction. The top of the upper reinforcing rib 4 fits in the mounting hole 81. When in use, the bottom of the upper seat plate 1 is in contact with the top of the wellhead turntable bushing 8, and the top of the upper reinforcing rib 4 is in cooperation with the mounting hole 81 to achieve the centering and fixation of the drill rod receiving or drilling rod throwing device. The upper reinforcing rib 4 can be a roughly right-angled triangular plate-like structure, whose long straight sides can be welded and fixed on the top outer wall of the column 2, and whose short straight sides can be welded and fixed on the bottom of the upper seat plate 1, and whose oblique sides can make the upper reinforcing rib 4 easier to introduce into the mounting hole 81 of the wellhead turntable bushing 8. It can be understood that in other embodiments, the upper reinforcing rib 4 can also be a roughly right-angled trapezoidal, fan-shaped, or square plate-like structure, which is not limited here.

Preferably, the plurality of upper reinforcing ribs 4 include at least four upper reinforcing ribs 4 to ensure that the upper reinforcing ribs 4 can be centrally placed in the drill rod hole 7 and to ensure that the connection between the upper seat plate 1 and the column 2 is reliable and firm.

The lower base 3 may be a hollow hemispherical structure, and its outer diameter is the same as that of the column 2. In other embodiments, the lower base 3 may also be a cylindrical structure with the same outer diameter as that of the column 2. A blind plate 6 is provided between the lower base 3 and the column 2, and the blind plate 6 constitutes the bottom of the drill rod hole 7. The blind plate 6 may be welded and fixed to the inner side wall of the bottom of the column 2. At the same time, a plurality of lower reinforcing ribs 5 may be provided between the blind plate 6 and the lower base 3 to increase the strength of the lower part of the drill rod receiving or drill rod throwing device, ensure sufficient safety margin, and improve safety. Preferably, the lower reinforcing ribs 5 are plate-shaped, and the plurality of lower reinforcing ribs 5 are evenly distributed along the circumference of the lower base 3, one side of which may be welded to the inner side wall of the lower base 3, and the other side of which may be welded to the bottom of the blind plate 6. In some embodiments, the plurality of lower reinforcing ribs 5 include three lower reinforcing ribs 5, which are evenly distributed on the inner side wall of the lower base 3 at intervals of 120°. It can be understood that in other embodiments, the lower base 3 can also be plate-shaped, which constitutes the bottom of the drill rod hole 7; the outer size of the lower base 3 can be larger than the outer diameter of the column 2, and the lower reinforcement ribs 5 are welded and joined to the upper part of the lower base 3 and the bottom outer wall of the column 2 respectively.

The upper seat plate 1, the upper reinforcing rib 4, the column 2, the blind plate 6, the lower reinforcing rib 5, and the lower base 3 can all be made of steel material, the thickness of the steel material is not less than 20 mm, and they can be fixed to each other by welding to ensure that the drill rod receiving or drill rod throwing device has a certain strength when in use. In some embodiments, the thickness of the steel material used can be about 25-30 mm, which can ensure that the drill rod receiving or drill rod throwing device can withstand the total load of 1 column of 5-1/2" heavy drill rod or the impact force of rapid lowering during use, ensuring operation safety.

Furthermore, part of the casing coupling may be welded in the drill rod hole 7 of the upper seat plate 1 to form a step for hanging, thereby further improving the strength.

Compared with the prior art, the drill rod connecting or drilling rod throwing device of the present invention improves the traditional drill rod connecting or drilling rod throwing process, reduces the sitting slip and lifting slip processes, thereby significantly reducing the work intensity of on-site workers, reducing the safety risk of operation, and improving the operation efficiency of connecting or drilling rod throwing. According to the on-site use conditions, the use of the drill rod connecting or drilling rod throwing device can improve the operation efficiency by about 20% compared with the previous average speed. In addition, the manufacture of the drill rod connecting or drilling rod throwing device can be completed by using existing old casings, which can meet the needs of on-site operations, save resources, and realize the reuse of waste materials.

It can be understood that the above-mentioned technical features can be used in any combination without limitation.

The above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims (9)

1. A drill rod receiving or drilling rod throwing device, characterized in that it comprises a lower base (3), a column (2) mounted on the lower base (3), and an upper seat plate (1) mounted on the top of the column (2), wherein the upper seat plate (1) and the column (2) are provided with a drill rod hole (7) for the drill rod (9) to extend in the length direction, the depth of the drill rod hole (7) is less than the length of the drill rod (9), so that the drill rod joint (91) is exposed outside the drill rod hole (7); a plurality of upper reinforcing ribs (4) are provided between the upper seat plate (1) and the column (2), the upper reinforcing ribs (4), the column (2) and the lower base (3) can be built into the mounting hole (81) of the wellhead rotary core (8), and the outer dimension of the upper seat plate (1) is greater than the diameter dimension of the mounting hole (81) on the wellhead rotary core; The column (2) is a cylindrical structure with openings at both ends, the lower base (3) is a hollow hemispherical or cylindrical structure, and the outer diameter of the lower base (3) is the same as the outer diameter of the column (2); a blind plate (6) is provided between the column (2) and the lower base (3), and the blind plate (6) forms the bottom of the drill rod hole (7); a plurality of lower reinforcing ribs (5) are provided between the blind plate (6) and the lower base (3); The upper reinforcing rib (4) is a plate-like structure in the form of a right triangle, a right trapezoid or a fan; one side of the upper reinforcing rib (4) is welded and fixed to the top outer wall of the column (2), and the other side is welded and fixed to the bottom of the upper seat plate (1). 2. The drill rod connecting or drilling rod throwing device according to claim 1 is characterized in that the upper seat plate (1), the upper reinforcing rib (4), the column (2), and the lower base (3) are all made of steel materials with a thickness of 25-30 mm; the column (2) and the upper seat plate (1) and the lower base (3), as well as the upper reinforcing rib (4) and the column (2) and the upper seat plate (1) are all fixed by welding. 3. The drill rod connecting or drilling rod throwing device according to claim 1 is characterized in that the upper seat plate (1) is a square plate with an arc shape, and the outer dimensions of the upper seat plate (1) are 600 mm in length and 600 mm in width. 4. The drill rod connecting or drilling rod throwing device according to claim 1 is characterized in that the number of the upper reinforcing ribs (4) is at least four, and at least four of the upper reinforcing ribs (4) are evenly distributed along the circumference of the column (2); the top of the upper reinforcing rib (4) is engaged in the mounting hole (81) of the wellhead turntable core (8). 5. The drill rod connecting or drilling rod discarding device according to claim 1 is characterized in that the diameter of the drill rod hole (7) is more than 1.2 times the outer diameter of the drill rod joint (91), and the depth of the drill rod hole (7) is 9.5-10m. 6. The drill rod connecting or drilling rod throwing device according to claim 1, characterized in that a gasket is provided at the bottom of the drill rod hole (7) so that the drill rod joint (91) is exposed outside the drill rod hole (7). 7. The drill rod receiving or drilling rod throwing device according to claim 1 is characterized in that a lifting short section is provided on the column (2) to adjust the depth of the drill rod hole (7). 8. The drill rod connecting or drilling rod throwing device according to claim 1 is characterized in that the blind plate (6) and the lower reinforcing rib (5) are both made of steel plate structure with a thickness of 25-30 mm; the blind plate (6) is welded and fixed to the inner wall of the bottom of the column (2), one side of the lower reinforcing rib (5) is welded and fixed to the inner wall of the lower base (3), and the other side is welded and fixed to the bottom of the blind plate (6). 9. The drill rod receiving or drill rod throwing device according to claim 1, characterized in that the number of the lower reinforcing ribs (5) is three, and the three lower reinforcing ribs (5) are evenly distributed along the circumference of the lower base (3).