Casing unjamming device for over-the-wire drilling

Abstract

The utility model discloses a follow the pipe drilling casing device of pipe, including support seat, hoist gourd, counter -punch seat and hammering block, is equipped with a plurality of support bars on support seat, and hoist gourd is hung in support seat bottom, and counter -punch seat is hung in hoist gourd, and counter -punch seat bottom is fixed perpendicularly with a guide rod, and the lower end of guide rod is equipped with screw threads, and hammering block is sleeved on the guide rod, and is equipped with a pull rope on hammering block, and the bottom of support seat is equipped with a pulley, and the pull rope passes through the pulley, and the pull rope drives hammering block to make perpendicular reciprocating motion on the guide rod, and the guide rod is connected with casing screw thread. Compared with prior art, the utility model uses flexibly, and turns around conveniently, can effectively loosen the casing in the borehole.

Description

Technical Field

[0001] This utility model pertains to geological core drilling equipment, specifically relating to a casing release device for casing drilling. Background Technology

[0002] Casing drilling is a special drilling method in geological core drilling, in which casing is driven in while drilling, or the casing is driven in advance and then the drill string follows. This method can prevent borehole wall collapse or quicksand clogging during drilling and is suitable for drilling loose strata and quicksand layers. When drilling is completed and the predetermined drilling depth is reached, the driven casing needs to be removed for reasons such as facilitating subsequent construction, saving costs, and ensuring project quality.

[0003] Currently, hydraulic pipe pullers are used to remove casing after drilling. However, due to factors such as the large depth of casing penetration during drilling, the strong adhesion of the casing wall to the heavy mud content of the formation, and water and gas leakage due to formation faults and fractures, the casing often gets stuck in the borehole, making it impossible for the hydraulic pipe puller to remove the casing. This leads to situations such as lost casing and abandoned wells, which causes a sharp increase in drilling costs. Utility Model Content

[0004] The purpose of this invention is to overcome the problem that existing hydraulic pipe pullers cannot pull out the casing of the drilling pipe, and to provide a casing release device that can effectively loosen the casing of the drilling pipe.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a casing unjamming device for casing drilling, including a support base, a hoist, a reverse strike base, and a hammer block. Several support rods are provided on the support base. The hoist is hung at the bottom of the support base. The reverse strike base is hung on the hoist. A guide rod is vertically fixed at the bottom of the reverse strike base. The lower end of the guide rod is threaded. The hammer block is sleeved on the guide rod. A pull rope is provided on the hammer block. A pulley is provided at the bottom of the support base. The pull rope passes through the pulley and drives the hammer block to make vertical reciprocating motion on the guide rod. The guide rod is threadedly connected to the casing.

[0006] Optionally, the support base is provided with three support rods, which are rotatably connected to the support base.

[0007] Optionally, the support rod consists of a connecting rod and several combined rods, with the connecting rod and the combined rods threadedly connected, and the combined rods threadedly connected to each other.

[0008] Optionally, the support base and the counter-attacking base are discs, and the hammering block is a cylinder.

[0009] Optionally, two pull ropes are symmetrically arranged on the hammer block, and two pulleys are symmetrically hung at the bottom of the support base, with the two pull ropes passing through the two pulleys respectively.

[0010] Optionally, the hoist is a manual hoist.

[0011] The usage and principle of this utility model are as follows: In use, a support frame is erected, and the hoist and pulley are hung on the support base. The hammer block is fitted onto the guide rod, which is connected to the casing. The reverse strike seat is hung on the hoist. A pull rope is tied to the hammer block, passing through the pulley. The hoist pulls the casing upwards, and after tightening, pulling the pull rope causes the hammer block to strike the reverse strike seat, giving the casing an upward vibration force and loosening it. Then, the hoist tightens the casing again, pulling and striking simultaneously, gradually loosening the casing inside the borehole. After the casing is loosened, the hoist can be used to slowly pull the casing out, or the device can be removed, and the casing can be connected to a hydraulic pipe puller for quick removal.

[0012] This invention uses a hammer block to repeatedly strike the vibrating sleeve upwards, and then uses a hoist to pull it upwards multiple times, which loosens the sleeve inside the borehole and makes it easier to pull the sleeve out of the borehole. The components are detachable and easy to transport. The support rod is designed in sections, which can be adjusted in height and can also be made from drill rods on site, saving costs and reducing the pressure of transportation.

[0013] Compared with the prior art, the advantages of this utility model are: this utility model is flexible in use, convenient in turnover, and can effectively loosen the casing inside the drill hole. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the side structure of this utility model;

[0015] The components in the attached diagram are labeled as follows: support base 1, hoist 2, counter-attack base 3, hammer block 4, support rod 5, connecting rod 51, combination rod 52, guide rod 6, pull rope 7, pulley 8. Detailed Implementation

[0016] Example 1, in conjunction with the following Figure 1Further description of this utility model: A casing unjamming device for casing drilling includes a support base 1, a hoist 2, a reverse strike base 3, and a hammer block 4. The support base has three support rods 5, each consisting of a connecting rod 51 and several combined rods 52. The connecting rod and the combined rods are threaded together, and the combined rods are threaded together. The connecting rod of the support rod is hinged to the support base. Several hanging rings are provided at the bottom of the support base. The hoist is hooked onto the hanging rings at the bottom of the support base via hooks. The reverse strike base has a hanging... The ring and the reverse strike seat are attached to the hook of the hoist via a hanging ring. A guide rod 6 is vertically welded to the bottom of the reverse strike seat. The lower end of the guide rod is threaded. The hammer block has a through hole and is fitted onto the guide rod through the through hole. A pull rope 7 is provided on the hammer block. A tie ring is welded to the hammer block and the pull rope is connected to the hammer block through the tie ring. A pulley 8 is welded to the bottom of the support base. The pulley is a fixed pulley. The pull rope passes through the pulley and drives the hammer block to make vertical reciprocating motion on the guide rod. The guide rod is threadedly connected to the sleeve.

[0017] Optionally, the support base and the counter-attacking base are discs, and the hammering block is a cylinder.

[0018] Optionally, two pull ropes are symmetrically arranged on the hammer block, and two pulleys are symmetrically hung at the bottom of the support base, with the two pull ropes passing through the two pulleys respectively.

[0019] Optionally, the hoist is a manual hoist.

[0020] The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the protection scope of the present invention.

Claims

1. A casing unjamming device for casing drilling, comprising a support base (1), a hoist (2), a reverse strike base (3), and a hammer block (4), wherein the support base is provided with several support rods (5), characterized in that: The hoist is attached to the bottom of the support base, and the reverse strike base is attached to the hoist. A guide rod (6) is vertically fixed at the bottom of the reverse strike base. The lower end of the guide rod is threaded. The hammer block is sleeved on the guide rod. A pull rope (7) is provided on the hammer block. A pulley (8) is provided at the bottom of the support base. The pull rope passes through the pulley and drives the hammer block to make vertical reciprocating motion on the guide rod. The guide rod is threadedly connected to the sleeve.

2. The casing unjamming device for casing drilling according to claim 1, characterized in that: The support base is equipped with three support rods, which are rotatably connected to the support base.

3. The casing unjamming device for casing drilling according to claim 1, characterized in that: The support rod consists of a connecting rod (51) and several combination rods (52). The connecting rod and the combination rods are threaded together, and the combination rods are threaded together.

4. The casing unjamming device for casing drilling according to claim 1, characterized in that: The support base and the counter-attacking base are discs, and the hammer block is a cylinder.

5. The casing unjamming device for casing drilling according to claim 1, characterized in that: Two ropes are symmetrically arranged on the hammer block, and two pulleys are symmetrically attached to the bottom of the support base. The two ropes pass through the two pulleys respectively.

6. The casing unjamming device for casing drilling according to claim 1, characterized in that: The hoist is a manual hoist.

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