CN108979567A - A kind of Directional Drilling operation on the sea clamping drilling rod safety device - Google Patents

Abstract

The invention discloses a kind of Directional Drilling operation on the sea clamping drilling rod safety devices, including support, pull rod and taper pullover, the support is fixedly mounted in front of drilling machine in lower margin square hole, the support totally two, each support is fixedly connected by one end of a removable pin I and pull rod, the other end of the every pull rod connects taper pullover by removable pin II, and taper pullover and drilling machine are separately positioned on the two sides of support, and drilling rod is fixed in taper pullover and is connected with drilling machine jaw.Beneficial effects of the present invention: 1, at sea Recycling of drill rod when, prevent drilling machine hold tightly single drill pipe shackle after, tail portion drilling rod fallen into because of rebound in the sea, tail portion drilling rod to be recycled is drawn using the device, to prevent drilling rod separating operation ship；2, structure is simple, easy to use, safe and practical.

Description

A safety device for clamping drill pipe in offshore operation of directional drilling

technical field

The invention belongs to the technical field of underground drilling, and in particular relates to a safety device for clamping drill pipes in offshore operations of directional drilling.

Background technique

The construction of directional drilling land-sea crossing project is the operation of towing and reaming on land and recovering drill pipes at sea. When recovering drill pipes at sea, when the single drill pipe tightly held by the drilling rig is undocked, a large number of drill pipes at the tail will fall into the sea due to rebound. Therefore need a kind of novel device, pull the drill pipe that the tail is to be recovered, make it not break away from the operation ship.

Contents of the invention

In view of the above situation, the present invention provides a safety device for clamping drill pipes in offshore operations of directional drilling, which provides a more effective technical solution for solving the above problems.

The technical scheme adopted by the present invention is as follows: a safety device for clamping drill rods in offshore operations of directional drilling, including a support, a tie rod and a tapered sleeve, the support is fixedly installed in the square hole in the front of the drilling rig, the support There are two in total, each support is fixedly connected to one end of a pull rod through a movable pin I, and the other end of each pull rod is connected to a tapered sleeve through a movable pin II, and the tapered sleeve and the drilling machine are respectively arranged on the support On both sides of the seat, the drill pipe is fixed in the conical sleeve and connected with the drill jaw.

Further, the drill pipe is suspended with slips through lifting lugs, and the drill pipe is stuck inside the tapered sleeve through the slips.

Further, the support and the tie rod are arranged at a certain angle, and the angle formed by the support and the tie rod can be adjusted according to the angle formed by the drill pipe and the horizontal plane.

Further, the taper of the inner taper of the tapered sleeve matches the taper of the outer taper of the slip.

Further, the taper of the inner tapered surface of the tapered sleeve and the outer tapered surface of the slips are both 1:3.

Further, the two supports or the two pull rods are arranged symmetrically with respect to the drill rod.

Beneficial effects of the present invention: 1. When recovering drill pipes at sea, prevent the drill pipe at the tail from falling into the sea due to rebound after the single drill pipe tightly held by the drilling rig is released , to prevent the drill pipe from leaving the workboat; 2. Simple structure, easy to use, safe and practical.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic top view of the present invention.

Among them: 1. Support, 2. Tie rod, 3. Drill pipe, 4. Slips, 5. Tapered sleeve, 6. Movable pin Ⅰ, 7. Movable pin Ⅱ.

Detailed ways

In order to make the objectives and technical solutions of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not used to protect the present invention. Limitation of scope, the present invention may have various changes and improvements without departing from the spirit and scope of the present invention.

Referring to Fig. 1 and Fig. 2, the safety device for pulling back and pulling the drill pipe for directional drilling includes a support 1, a pull rod 2 and a tapered sleeve 5.

The support 1 is fixed in the square hole in the front of the drilling rig by reinforced welding with steel plates. There are two support 1 in total. Each support 1 is fixedly connected to one end of a tie rod 2 through a movable pin I6, and the other end of each tie rod The conical sleeve 5 is connected with the movable pin II7, and the conical sleeve 5 and the drilling machine are arranged on both sides of the support 1 respectively. The drill pipe 3 is set in the conical sleeve head 5 and connected with the jaws of the drilling rig. The drill pipe 3 is hung with slips 4 through the lifting lugs. When the drill pipe 3 needs to be clamped, the slips 4 suspended above the drill pipe 3 Paste on the inside of the tapered sleeve 5, then hold the drill pipe 3 and insert it into the tapered sleeve 5, thereby blocking the drill pipe 3.

The two supports or two pull rods of the device are arranged symmetrically with respect to the drill rod. The support 1 and the pull rod 2 are set at a certain angle. The angle between the support 1 and the pull rod 2 can be adjusted according to the angle between the drill rod 3 and the horizontal plane adjustment. The taper of the inner conical surface of the conical sleeve 5 matches the taper of the outer conical surface of the slip 4, and the taper of the inner conical surface of the conical sleeve 5 and the outer conical surface of the slip 4 are both 1:3, which can just The drill pipe 3 is stuck in the conical sleeve 5. Slip 4 is designed as a multi-piece slip, which is lighter than the three-piece slip. Also be provided with the earring that is convenient to install or hoisting operation on the taper sleeve 5, there are two earrings.

When recovering the drill pipe at sea, the tail drill pipe produces a retreating force due to the rebound. At this time, the slip 4 holds the drill pipe 3 tightly through the slip teeth, and the outer cone surface of the slip 3 contacts the inner cone surface of the conical sleeve 5. force, and then drive the two pull rods 2 and the support 1 to pull the drill pipe 3 under force, so that the drill pipe 3 no longer retreats. When the drill pipe 3 is released, the drilling rig pulls the drill pipe so that the slips 4 move along the drill pipe 3 to the direction of the drilling rig and break away from the conical sleeve 5. up and away from the drill pipe. A drilling operation is completed.

The device set up by our company is to set the tie rod to 3600mm, the size of the support to 180*180*1000, the height of the support buried under the ground to 140mm, and the design angle between the tie rod and the support. In the process, the angle between the tie rod and the support can be adjusted according to the angle between the drill pipe and the horizontal plane. The device is generally suitable for marine environments not less than -20°C.

Claims (6)

1. a kind of Directional Drilling operation on the sea clamping drilling rod safety device, it is characterised in that: including support, pull rod and taper pullover, The support is fixedly mounted in front of drilling machine in lower margin square hole, and the support totally two, each support passes through an activity One end of a pin I and pull rod is fixedly connected, and the other end of the every pull rod connects taper pullover, taper by removable pin II Pullover and drilling machine are separately positioned on the two sides of support, and drilling rod is fixed in taper pullover and is connected with drilling machine jaw.

2. a kind of Directional Drilling operation on the sea clamping drilling rod safety device according to claim 1, it is characterised in that: the brill Bar is hung with slips by lifting lug, and the drilling rod is stuck in inside taper pullover by slips.

3. a kind of Directional Drilling operation on the sea clamping drilling rod safety device according to claim 1, it is characterised in that: the branch Seat and pull rod setting at an angle, the support and pull rod institute angle degree can according to drilling rod and horizontal plane institute it is angled into The corresponding adjustment of row.

4. a kind of Directional Drilling operation on the sea clamping drilling rod safety device according to claim 1, it is characterised in that: the cone The inner conical surface taper of shape pullover is adapted with the male cone (strobilus masculinus) taper of the slips.

5. a kind of Directional Drilling operation on the sea clamping drilling rod safety device according to claim 4, it is characterised in that: the cone The taper of the male cone (strobilus masculinus) of the inner conical surface and slips of shape pullover is 1:3.

6. a kind of Directional Drilling operation on the sea clamping drilling rod safety device according to claim 1, it is characterised in that: two institutes Support or two pull rods are stated to be symmetrical arranged about drilling rod.