Fishing lock for drill falling during well digging

Abstract

The utility model relates to a well-digging drill falling salvage lock which comprises a receiving tower drum, a locking section is arranged at one end of the receiving tower drum, a main rod is arranged at the other end of the receiving tower drum, a connecting sleeve is arranged on the upper portion of the main rod, a horn section is arranged on the lower portion of the locking section, a locking mechanism is arranged in the locking section, and a drill falling rod piece enters the locking section through the horn section and is locked by the locking mechanism. The connecting sleeve is connected with the head of the salvage drill rod, and the salvage drill rod lifts and pulls out the falling drill rod piece locked by the lock; by applying the device, the equipment utilization rate is increased, the construction cost is reduced, the construction efficiency is improved, the reworking time caused by drill falling is shortened, the construction is safe, the operation is simple, and the device can be popularized and applied to the technical field of well drilling and drill falling fishing.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling and well digging construction, and in particular relates to a lock for salvaging a drill bit dropped during well digging. Background Art

[0002] In the Haixi region of Qinghai, rainfall is low all year round. In order to solve the water problem of life, agriculture and industry, the method of digging wells to extract groundwater is adopted to solve the water problem. The geomorphic unit of the well-drilling area of ​​this project is the alluvial plain in front of the mountain. The terrain is open and flat. It is the end of the lake phase deposition. The foundation soil of the site is composed of breccia (Q4 (al+pl) from top to bottom: variegated, slightly wet, slightly dense to medium dense, and the mass of particles with a particle size greater than 2mm accounts for more than 50% of the total mass. The skeleton particles are partially in contact and arranged in an orderly manner. They are mostly angular and irregular in shape, with poor roundness. The surface of the breccia is moderately weathered. The filling materials are various levels of sand and gravel filling. The parent rock composition is mainly granite and quartzite; this layer is partially intercalated with 10-30cm thick lens-shaped fine sand, which is distributed throughout the site. The site soil is medium-hard soil.

[0003] The well depth of this project is 200 meters and the well diameter is After the well is completed, The well wall pipe, the well wall pipe and the well wall are filled with filter material, and the filter material is well graded to ensure the anti-filtration effect. In the process of well construction, loose formations or poor mud wall protection can easily cause the hole wall to collapse, put pressure on the drill pipe, and cause the drill pipe to break. Since the cost of drill bits and drill pipes is high, how to successfully salvage the drill bits and drill pipes is an urgent problem for operators to solve. Summary of the invention

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the above-mentioned prior art and provide a well drilling drill drop salvage lock which reduces construction cost, improves construction efficiency, reduces rework time due to drill drop, is safe in construction and is easy to operate.

[0005] The technical solution adopted to solve the above technical problems is: a drilling drill lost drill salvage lock, including a receiving tower, a locking joint is arranged at one end of the receiving tower, and a main rod is arranged at the other end, a connecting sleeve is arranged on the upper part of the main rod, a horn joint is arranged at the lower part of the locking joint, and a locking mechanism is arranged inside the locking joint. The lost drill rod piece enters the locking joint through the horn joint and is locked by the locking mechanism, the connecting sleeve is connected with the head of the salvage drill rod, and the lost drill rod piece locked by the lock is lifted and pulled out by the salvage drill rod.

[0006] The locking mechanism of the utility model is as follows: a locking baffle is concentrically arranged with a locking joint, a plurality of lock catch plates are evenly arranged on the side wall of the locking joint, and the lock catch plates can rotate up and down, and are limited when the lock catch plates rotate downward to the locking baffle.

[0007] The utility model provides lock windows on the side wall of the locking joint, the number and position of the lock windows correspond to the lock plates, the lock plates extend out of the locking joint from the lock windows, and are arranged on the outer side wall of the locking joint through a locking shaft, and the lock plates can rotate relative to the locking shaft.

[0008] The locking plate of the utility model comprises a locking plate body, which is a rectangular plate. A sleeve is arranged at one end of the locking plate body, and a locking shaft is arranged in the sleeve.

[0009] The sleeve of the utility model is provided with a pull ring.

[0010] The locking joint of the utility model is a hollow cylindrical structure.

[0011] The utility model provides stiffening ribs between the main rod and the receiving tower.

[0012] The connecting sleeve of the utility model is a hollow cylindrical structure, and an internal thread is processed inside the connecting sleeve to match the head of the salvage drill rod.

[0013] The receiving tower of the utility model is a hollow cylindrical structure.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The lock of the utility model is connected with the head of the salvage drill pipe through a connecting sleeve. According to the depth of the dropped drill pipe, the lock is gradually lowered to the dropped drill pipe depth through the well making drill pipe. The dropped drill pipe enters the locking joint through the lock horn joint, and the connecting sleeve of the dropped drill pipe is locked by the locking mechanism arranged in the locking joint. After the lock locks the dropped drill pipe, positive and negative cycles are circulated to loosen the soil around the lock, and the drill and rod are slowly lifted. After the dropped drill pipe is lifted out of the ground, the dropped drill pipe is locked with a locking device, and the lock is removed to complete the dropped drill salvage. The application of the device improves the equipment utilization rate, reduces the construction cost, improves the construction efficiency, reduces the rework time due to the dropped drill, has safe construction and simple operation, and can be widely applied to the technical field of well drilling dropped drill salvage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0017] Figure 2 yes Figure 1 BB cross-sectional view.

[0018] Figure 3 yes Figure 1 A is a partial enlarged view.

[0019] Figure 4 yes Figure 3 A schematic structural diagram of the middle locking plate 9.

[0020] In the figure: 1. connecting sleeve; 2. main rod; 3. stiffening rib; 4. receiving tower; 5. locking section; 6. horn section; 7. locking window; 8. locking baffle; 9. locking plate; 10. pull ring; 11. locking shaft; 9-1. buckle plate body; 9-2. sleeve. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to these embodiments.

[0022] Example 1

[0023] exist Figures 1 to 4 In the present invention, the drilling drill lost salvage lock device includes a receiving tower 4, which is a hollow cylindrical structure. The length of the receiving tower 4 needs to ensure that the salvaged drill rod has enough moving distance therein. A locking joint 5 is arranged at one end of the receiving tower 4 and a main rod 2 is arranged at the other end. The locking joint 5 is a hollow cylindrical structure. In order to ensure the connection stability of the main rod 2, a stiffening rib 3 is arranged between the main rod 2 and the receiving tower 4. A connecting sleeve 1 is arranged at the upper part of the main rod 2. The connecting sleeve 1 is a hollow cylindrical structure. The connecting sleeve 1 is processed with an internal thread inside, which matches the salvage drill rod head. The drill rod lost locked by the lock device is lifted and pulled out by the salvage drill rod. A horn section 6 is arranged at the lower part of the locking section 5. The shape of the horn section 6 facilitates the lock device to enter the soil and allows the salvaged drill rod lost to enter the locking section 5 smoothly. A locking mechanism is arranged inside the locking section 5. The drill rod lost enters the locking section 5 through the horn section 6 and is locked at its connecting sleeve by the locking mechanism.

[0024] Furthermore, the locking mechanism is connected and composed of a locking baffle 8, a locking plate 9, a pull ring 10, and a locking shaft 11. The locking baffle 8 is concentrically arranged with the locking section 5, and mainly plays a limiting role. Several groups of locking plates 9 are evenly arranged on the side wall of the locking section 5, and the locking plates 9 can rotate up and down. The locking plates 9 are limited when they rotate downward to the locking baffle 8. In practice, when the salvaged drill rod piece enters the horn section 6 and moves upward, the diameter of the connecting sleeve of the drill rod piece is larger than the diameter of the circle formed by the inner side of several groups of locking plates 9, so that the locking plates 9 rotate upward, and the lock continues to drill to a certain depth. The salvaged drill rod piece enters the locking section 5 and the receiving tower 4 in turn. The diameter of the circle formed by the inner side of several locking plates 9 is larger than the diameter of the main rod of the drill rod piece. At this time, the locking plate 9 falls to the locking baffle 8 due to gravity. When the lock is lifted, the connecting sleeve of the salvaged drill rod piece is locked by the reverse force of the locking baffle 8 to prevent the drill rod piece from escaping from the lock. Specifically, a lock window 7 is provided on the side wall of the locking joint 5, and the number and position of the lock window 7 correspond to the lock plate 9. The lock plate 9 extends out of the locking joint 5 from the lock window 7 and is arranged on the outer wall of the locking joint 5 through a locking shaft 11. The lock plate 9 includes a lock plate body 9-1, which is a rectangular plate. A sleeve 9-2 is provided at one end of the lock plate body 9-1, and the locking shaft 11 is arranged in the sleeve 9-2 to ensure that the lock plate 9 can rotate relative to the locking shaft 11. A pull ring 10 is provided on the sleeve 9-2. On the one hand, the pull ring 10 serves as a handle to control the rotation of the lock plate 9 when the drill rod is pulled out of the ground so that the lock is separated from the drill rod. On the other hand, it serves as a fixing device. When the lock plate 9 is rotated to the highest position, it is temporarily fixed by the pull ring 10 to prevent the lock plate 9 from resetting due to gravity, thereby ensuring that the lock is smoothly separated from the drill rod.

[0025] The steps of salvaging lost rods in the utility model are as follows:

[0026] Step 1: Processing the locks: assemble and process the above locks in sequence.

[0027] Step 2: Install the lock: Install the lock on the drill pipe head of the drilling equipment, and the lock is connected through the connecting sleeve 1.

[0028] Step 3: Lower the lock: According to the depth of the drill pipe, gradually lower the lock to the drill pipe drop depth.

[0029] Step 4, lock the dropped drill rod: the dropped drill rod passes through the lock horn section 6 and the lock locking section 5 to enter the receiving tower 4. When the dropped drill rod passes through the locking section 5, the locking plate 9 rotates upward around the locking shaft 11 to open. After the dropped drill rod connecting sleeve passes through the locking section 5, lightly lift the drill rod to ensure that the locking plate 9 is close to the locking baffle 8 and is not deformed.

[0030] Step 5: Lift the drill and pull out the rod: After the lock locks the drill rod, cycle forward and reverse to loosen the soil around the lock, and slowly lift the drill and pull out the rod.

[0031] Step 6, remove the lock: After the drill rod is lifted out of the ground, lock the drill rod with a lock, withdraw the lock, rotate the locking plate 9 upward to loosen the connection sleeve of the drill rod, and temporarily fix it with the pull ring 10, withdraw the drill rod from the receiving tower 4, remove the lock, and complete the drill salvage.

Claims

1. A lock for salvaging a drill bit lost during drilling, characterized by: It comprises a receiving tower (4), one end of the receiving tower (4) is provided with a locking joint (5), and the other end is provided with a main rod (2), the upper part of the main rod (2) is provided with a connecting sleeve (1), the lower part of the locking joint (5) is provided with a horn joint (6), a locking mechanism is provided inside the locking joint (5), a lost drill rod piece enters the locking joint (5) through the horn joint (6) and is locked by the locking mechanism, the connecting sleeve (1) is connected to the head of the salvaged drill rod, and the lost drill rod piece locked by the locking mechanism is lifted and pulled out by the salvaged drill rod; The locking mechanism comprises: a locking baffle (8) and a locking joint (5) are arranged concentrically, a plurality of locking plates (9) are evenly arranged on the side wall of the locking joint (5), and the locking plates (9) can be rotated up and down. When the locking plates (9) are rotated downward to the locking baffle (8), they are limited.

2. The well drilling and salvage lock according to claim 1, characterized in that: The locking joint (5) is provided with locking windows (7) on the side wall. The number and position of the locking windows (7) correspond to the locking plate (9). The locking plate (9) extends out of the locking joint (5) from the locking windows (7) and is arranged on the outer side wall of the locking joint (5) via a locking shaft (11). The locking plate (9) can rotate relative to the locking shaft (11).

3. The well drilling and salvage lock according to claim 2, characterized in that: The locking plate (9) comprises a locking plate body (9-1), the locking plate body (9-1) is a rectangular plate, one end of the locking plate body (9-1) is provided with a sleeve (9-2), and the locking shaft (11) is provided in the sleeve (9-2).

4. The well drilling and salvage lock according to claim 3, characterized in that: The sleeve (9-2) is provided with a pull ring (10).

5. The well drilling and salvage lock according to claim 1, characterized in that: The locking joint (5) is a hollow cylindrical structure.

6. The well drilling and salvage lock according to claim 1, characterized in that: A stiffening rib (3) is provided between the main rod (2) and the receiving tower (4).

7. The well drilling and salvage lock according to claim 1, characterized in that: The connecting sleeve (1) is a hollow cylindrical structure, and an internal thread is processed inside the connecting sleeve (1) to match the head of the salvage drill pipe.

8. The well drilling and salvage lock according to claim 1, characterized in that: The receiving tower (4) is a hollow cylindrical structure.

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