CN205117295U - Super large aperture well drilling follow -up wall of a well structure - Google Patents

Abstract

The follow-up well wall structure of ultra-large-aperture drilling has a circular concrete well wall, and the outer circumference of the well wall is axially provided with infusion pipes; the upper and lower peripheral edges of the well wall are provided with dovetails that are adjacent in sequence and can match each other. Protrusions and dovetail grooves; lighting lamps are installed on the inner wall of the well wall, and the two axial ends of the lighting lamps are sequentially connected with wires and joint power sources; the super-large-aperture drilling follow-up well wall structure can not only adjust the friction between the well wall and the well hole At the same time, the ultra-large-aperture drilling follow-up well wall structure is equipped with a lighting system, which is convenient for observing the internal conditions of the wellbore when the well wall is lowered. The structure is simple, the construction is simple, solid and reliable, and the integrity Strong, it is a reliable wellbore structure for ultra-large caliber drilling rig drilling operations.

Description

Super-large aperture drilling follow-up borehole structure

technical field

The utility model relates to a well wall structure, in particular to a super large aperture drilling follow-up well wall structure.

Background technique

Since the drilling caliber of the drilling operation is relatively small, the wall around the drilling will be well resolved. However, for the well wall of the ultra-large caliber drilling, the construction difficulty is more difficult, because the ultra-large drilling caliber is relatively large, generally They are all above 5 meters, and some even reach more than ten meters or even more than twenty meters. The volume and weight of such a large-caliber drilling well are particularly huge; However, during the process of lowering and follow-up, the resistance of the well wall lowering and follow-up will often increase, making the super-large-diameter well wall stop and cannot be lowered for follow-up; at the same time, due to the deep hole , the light at the bottom is dark, and there is no lighting equipment on the shaft wall, so the state of the lowering of the shaft wall cannot be observed, which will affect the progress and efficiency of the construction of the ultra-large aperture shaft wall.

Contents of the invention

In order to solve the problem of difficult follow-up of the super-large-diameter drilling well wall during drilling operations, the utility model provides a super-large-diameter drilling follow-up well wall structure, which can not only adjust the well wall and the wellbore The frictional force facilitates the smooth lowering and follow-up of the well wall. At the same time, the ultra-large-aperture drilling follow-up well wall structure is equipped with a lighting system, which is convenient for observing the internal conditions of the well hole when the well wall is lowered. The structure is simple, the construction is simple, and it is firm and reliable. With strong integrity, it is a reliable wellbore structure for ultra-large caliber drilling rigs.

The technical solution adopted by the utility model to solve the technical problem is: the super-large aperture drilling follow-up well wall structure, including: infusion tube, well wall, wire, lighting, dovetail groove, joint power supply, dovetail protrusion; the super large aperture Drilling follow-up The well wall structure has a circular concrete well wall, and an infusion tube is arranged axially around the outside of the well wall; after the liquid is input into the infusion tube, it can wash the sand and gravel on the inner wall of the well hole, reducing the friction between the well wall and the well hole. The frictional force facilitates the smooth lowering and follow-up of the well wall; on the upper and lower circumference of the well wall, there are dovetail protrusions and dovetail grooves that are adjacent in sequence and can match each other. The setting of the dovetail protrusions and dovetail grooves makes it easy to go up and down the well The splicing of the wall ensures the integrity and stability of the well wall; lighting lamps are installed on the inner wall of the well wall, and the two axial ends of the lighting lamps are sequentially connected with wires and connector power sources; Observe the inside of the wellbore.

During the drilling operation, on the ground near the drilling, the concrete well wall is formed and solidified first, and then transported to the top of the selected wellhead, and the super-large-caliber drilling rig is gradually installed on the well wall, and then the drilling operation is started. Due to the super-large The caliber drilling rig continuously discharges the soil from the lower part of the well wall to form a wellhead, which promotes the gradual sinking of the well wall until the upper edge of the well wall is flush with the ground. Good concrete binder, and then transport the prefabricated second well wall to the top of the well wall coated with concrete binder, so that the dovetail protrusions and dovetail grooves on the upper part of the first well wall and the second well wall The dovetail protrusions and dovetail grooves at the lower part are fitted and fixed. In addition, the infusion pipes and joint power supplies on the well wall are also fitted and fixed. Relying on the pressure of its own weight, it will gradually follow up and fall. When the upper edge of the well wall is flush with the ground again, the above operation will be used again, and the well wall will be stacked repeatedly until the drilling rig drills to the required drilling depth.

The beneficial effects of the utility model are: the super-large-aperture drilling follow-up well wall structure can not only adjust the friction between the well wall and the well hole, and facilitate the smooth lowering and follow-up of the well wall, but at the same time, the super-large-aperture drilling follow-up well wall structure can There is a lighting system, which is convenient for observing the internal conditions of the wellbore when the wellbore is lowered. The structure is simple, the construction is convenient, solid and reliable, and the integrity is strong. It is a reliable wellbore structure for super-large-diameter drilling operations.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the structural principle schematic diagram of the utility model.

In the figure, 1. Infusion tube, 2. Well wall, 3. Lead wire, 4. Lighting lamp, 5. Dovetail groove, 6. Connector power supply, 7. Dovetail protrusion.

detailed description

In Fig. 1, the super-large-aperture drilling follow-up well wall structure includes: infusion pipe 1, well wall 2, wire 3, lighting lamp 4, dovetail groove 5, joint power supply 6, and dovetail protrusion 7; the super-large-aperture drilling follow-up The well wall structure has a circular concrete well wall 2, and an infusion tube 1 is arranged axially around the outer circumference of the well wall 2; after the liquid is input into the infusion tube 1, it can wash the sand and gravel on the inner wall of the well hole, reducing the gap between the well wall and the well. The friction force of the hole facilitates the smooth lowering and follow-up of the well wall; on the upper and lower peripheral edges of the well wall 2, there are dovetail protrusions 7 and dovetail grooves 5 that are adjacent in sequence and can match each other, and dovetail protrusions 7 and dovetail grooves The setting of 5 facilitates the splicing of the upper and lower shaft walls 2, ensuring the integrity and stability of the shaft wall; the lighting lamp 4 is installed on the inner wall of the shaft wall 2, and the two axial ends of the lighting lamp 4 are sequentially connected with wires 3 and joints Power supply 6; lighting lamp 4 is convenient for observing the internal situation of the well hole when the well wall is lowered for follow-up.

During the drilling construction operation, on the ground near the drilling, the concrete well wall 2 is formed and solidified first, and then transported to the top of the selected wellhead, and the super large-caliber drilling rig is gradually installed on the well wall 2, and then the drilling operation is started. The super-large-diameter drilling rig continuously discharges the soil at the lower part of the well wall 2 to form a wellhead, which promotes the gradual sinking of the well wall 2 until the upper edge of the well wall 2 is flush with the ground, and the drilling rig stops working. Apply the prepared concrete adhesive on the upper edge surface, and then transport the prefabricated second well wall 2 to the top of the well wall 2 coated with the concrete adhesive, so that the dovetail on the upper part of the first well wall 2 protrudes 7. The dovetail groove 5 and the dovetail protrusion 7 at the lower part of the second well wall 2 are coincidently fixed, and the infusion pipe 1 and the joint power supply 6 of the well wall 2 are also coincidently plugged and fixed, and then the super large-diameter drilling rig is started In the drilling operation, after removing the soil from the lower part of the well wall 2, the second well wall 2 will gradually follow up and fall under the pressure of its own weight. When the upper edge of the well wall 2 is flush with the ground again, the above operation will be used again. Going round and round, continuously superimposing the well wall 2 until the drilling rig drills to the required drilling depth.

Claims (1)

1. ultra-large aperture drilling well follow-up shaft wall structure, comprising: woven hose (1), the borehole wall (2), wire (3), illuminating lamp (4), dovetail groove (5), joint power supply (6), dovetail tangs (7); It is characterized in that: this ultra-large aperture drilling well follow-up shaft wall structure has the concrete borehole wall (2) of an annular, the outside of the borehole wall (2) is axially provided with woven hose (1) in one week; The top and the bottom circumferential edge of the borehole wall (2), along upper, is provided with the adjacent and dovetail tangs (7) that can mutually coincide of order and dovetail groove (5); The inwall of the borehole wall (2) is provided with illuminating lamp (4), the axial two ends of illuminating lamp (4) have been linked in sequence wire (3) and joint power supply (6).