WO2020024604A1

WO2020024604A1 - Submarine drilling rig core-fetching cable device employing two-stroke pushing of cylinder

Info

Publication number: WO2020024604A1
Application number: PCT/CN2019/080691
Authority: WO
Inventors: 万步炎; 黄筱军; 金永平
Original assignee: 湖南科技大学
Priority date: 2018-07-30
Filing date: 2019-03-30
Publication date: 2020-02-06
Also published as: CN108756766A; CN108756766B

Abstract

A submarine drilling rig core-fetching cable device employing two-stroke pushing of a cylinder comprises a drilling power head (10), a drilling power head slide rail frame (1), a pushing cylinder (8), a steel cable two-stroke push-operated mechanism (7), a rock core inner tube fetching head (11), a fetching steel cable (9), a fetching steel cable movable and fixed pulley block, and a fetching winch (5). A fixed pulley (3) is disposed at the top of the drilling power head slide rail frame (1). A movable pulley (6) is disposed at the top of a pushing cylinder piston rod (81). The fetching winch (5) is fixedly mounted on a submarine drilling rig frame or the drilling power head slide rail frame (1). The fetching steel cable, which is connected to the rock core inner tube fetching head (11), passes through a through-hole at the top of the drilling power head (10), and is first wound around the fixed pulley (3) at the top of the drilling power head slide rail frame (1), is then wound around the movable pulley (6) at the top of the pushing cylinder piston rod (81), and then enters the fetching winch (5). The device effectively resolves the issue in which an integrated design of a submarine drilling rig drilling power head and a fetching winch causes it to be difficult to accurately control displacement and drilling rod fastener screwing strength and resolves the issue in which a common split-type fetching winch needs to move accurately along with a drilling power head.

Description

Rotary coring device for oil cylinder double-stroke subsea drilling rig

Technical field

The invention relates to a coring device for a drilling rig, in particular to a rope coring device for an oil cylinder double-stroke subsea drilling rig.

Background technique

Submarine drilling rig is an important drilling sampling equipment for carrying out subsea resource exploration, subsea engineering geological survey and marine scientific research. With the deepening of the drilling depth of subsea rigs, in order to improve the operating efficiency of the rig, the core drilling method of the submarine rig has also developed from the traditional core lifting method to an advanced rope core method. At present, most of the rope coring devices of subsea rigs adopt the integrated structural form of the drilling power head and the fishing winch to solve the problem that the ordinary drilling power head and the fishing winch are separately designed and installed. The fishing winch must accurately follow the drilling power head. Problems with sports. When the depth of the subsea drilling rig is not large, the amount of rope required for the fishing winch is small, and the size and quality of the corresponding fishing winch are also relatively small. However, when the drilling depth of the subsea rig reaches hundreds of meters or even kilometers, due to the sharp increase in the amount of rope capacity required, the overall size and quality of the corresponding fishing winch will become very large. If the drilling power is continued The integrated structure of the head and the fishing winch will cause the following problems:

(1) Because the overall dimensions of the integrated integrated drilling power head and fishing winch are too large, it is necessary to increase the height of the submarine rig to drill the power head slide rail frame, which will cause the overall height and weight of the subsea rig to increase, making Submarine rigs place higher requirements on the A-frame height and carrying capacity of the mother ship, and the carrying capacity of retractable winches and umbilicals. At the same time, it will increase the difficulty of the submarine rig in the process of lowering and recycling.

(2) Because the overall mass of the integrated and integrated drilling power head and the fishing winch is too large, both the motion inertia force and the friction resistance during the movement on the slide head frame of the drilling power head will greatly increase, resulting in drilling It is difficult to accurately control the displacement of the power head and the unscrewing force of the drill pipe wire connection and unloading process, so that the service life of the drill pipe (especially the active drill pipe for drilling into the power head) is greatly reduced, and the drill pipe wire connection and unloading are greatly reduced. The difficulty increases, the reliability decreases, the operation failure rate increases, the drilling head power rail wear increases, and the service life decreases.

However, if the common subsea drilling rig drilling power head and fishing winch are designed separately, during the drilling and auxiliary operation of the subsea rig, the fishing winch is fixed because the drilling power head moves up and down on the slide rail frame of the drilling power head. Without moving, the length of the fishing wire rope between the drilling power head and the fishing winch will change continuously with the movement of the drilling power head, causing the core inner tube fishing head suspended from the drilling power head to relax and fall, and A skipping accident occurs in the fishing wire rope. At this time, frequent forward and reverse operation control of the fishing winch is needed to ensure that the core inner tube fishing head and the fishing wire rope accurately follow the drilling power head during drilling and auxiliary operations. This not only increases the burden and design difficulty of the control system, but also reduces the service life of the rope coring system (the wear is greatly increased), and also reduces the working reliability of the rope coring system (easy to cause washing water seal failure and salvage) Broken wire rope).

In order to solve the above technical problems, it is urgent to develop a split design and installation technical solution for the drilling power head and the fishing winch. This solution can realize the core inner tube during drilling and auxiliary operations without adding additional high-precision fishing winch control. The salvage head and salvage wire rope accurately follow the movement of the drilling power head.

Summary of the invention

In order to solve the above technical problems, the present invention provides an oil cylinder double-stroke advance type which is easy to accurately control the displacement of the drilling power head and the tightening force of the drill rod without the need to add an additional high-precision control system. Coring device for subsea rig rope.

The technical scheme adopted by the present invention is: an oil-cylinder double-stroke submarine rig rope coring device, which includes a drilling power head, a drilling power-head slide rail frame, a propelling oil cylinder and a wire rope double-stroke propulsion mechanism, and a core inner tube salvage head. The salvage wire rope, the salvage wire rope fixed pulley block and the salvage winch, the propulsion cylinder can drive the drilling power head to move up and down through the wire rope double-pass propulsion mechanism; it is characterized in that a through hole communicating with the drill rod is opened on the top of the drilling power head, and the drill A fixed pulley is provided on the top of the slide head of the power head, and a movable pulley is provided on the top of the piston rod of the propulsion cylinder. The fishing winch is fixedly installed on the submersible rig frame or on the slide head of the power head. The core core fishing head is connected to the fishing wire rope. Suspension inside the drilling power head or the drill rod connected to the drilling power head; the fishing wire rope connected to the core inner tube fishing head goes up through the through hole at the top of the drilling power head, and then bypasses the drilling head slide The fixed pulley on the top of the frame bypasses the moving pulley on the top of the piston rod of the propulsion cylinder, and then enters the fishing winch.

In the above mentioned oil-cylinder double-stroke submarine rig rope coring device, after the fishing wire rope bypasses the movable pulley on the top of the piston rod of the propulsion cylinder, it does not directly enter the fishing winch, but is fixedly installed on the subsea rig frame or drilling power. The auxiliary fixed pulley or fixed pulley set on the head rail rack enters the fishing winch.

In the above-mentioned oil-cylinder double-stroke submarine rig rope coring device, a fixed pulley fixed on a slide head of a drilling power head or a submarine rig frame for steering of a steel wire rope, and a movable pulley for advancing the top of a piston rod of the oil cylinder, A pulley set consisting of multiple pulleys is used.

In the above-mentioned cylinder double-stroke submarine rig rope coring device, a fixed pulley or a fixed pulley group that drills into the top of the power head slide rail, a movable pulley or a movable pulley group that advances the top of the piston rod of the oil cylinder, and a subsea rig frame or a drilling power head The auxiliary fixed pulley or the auxiliary fixed pulley set on the slide rail frame is provided with a protection device for preventing the steel wire rope from jumping.

In the above mentioned oil-cylinder double-stroke submarine drill rope coring device, the fishing winch is provided with a fishing wire rope cable discharging device at the front.

Compared with the prior art, the beneficial effects of the present invention are:

(1) The present invention can effectively solve the problems that the integrated drilling power head of the subsea drilling rig is integrated with the fishing winch and the weight and size of the integrated drilling power head are too large, and it is difficult to achieve accurate displacement and control of the drill rod unloading force. .

(2) The present invention can effectively solve the problem that the fishing winch needs to accurately follow the movement of the drilling power head during drilling and auxiliary operations after the power head is separated from the fishing winch.

(3) The present invention can effectively reduce the performance requirements of the submarine drilling rig for supporting systems such as the mother ship and the retractable winch, and also reduces the difficulty of lowering and recovering the subsea drilling rig.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

FIG. 2 is a schematic structural diagram of Embodiment 2 of the present invention.

In the picture: 1-drilling power head slide rack, 2-wire rope jumper protection device, 3-fixed pulley, 4- salvage wire rope cable arrangement, 5- salvage winch, 6-movable pulley, 7-wire rope double-stroke propulsion mechanism, 8-propulsion cylinder, 81-propulsion cylinder piston rod, 9- salvage wire rope, 10-drilling power head, 101-through hole, 11-core inner tube salvage head, 12-auxiliary fixed pulley.

Specific implementation plan

The invention is further described below with reference to the drawings and embodiments.

Example 1

As shown in FIG. 1, the present invention includes a drilling power head 10, a drilling power head slide rail frame 1, a propulsion cylinder 8, and a wire rope double-pass propulsion mechanism 7, a core inner tube fishing head 11, a fishing wire rope 9, and a fishing wire rope. A pulley set and a fishing winch 5; a side of the drilling power head slide rail frame 1 is provided with a vertically arranged slide rail, and the drilling power head 10 is installed on the slide rail and can slide up and down along the slide rail. The drilling power head 10 is provided with a through hole 101 communicating with the drill rod on the top. The fishing wire rope fixed pulley block includes a fixed pulley 3 provided on the top of the drilling power head slide frame 1 and a movable pulley 6 installed on the top of the piston rod 81 of the propelling cylinder. The fishing winch 5 is fixedly installed on the submarine rig frame or the drilling power head slide rail frame 1. The fishing winch 5 is provided with a fishing wire rope cable discharging device at the front. The core inner tube fishing head 11 is connected to the fishing wire rope 9 and is suspended inside the drilling power head 10 or the drill rod connected to the drilling power head 10; the fishing wire rope 9 starting from the core inner tube fishing head 11 penetrates the drill upward. After entering the through hole 101 on the top of the power head 10, first bypass the fixed pulley 3 which is drilled on the top of the power head slide frame 1, then bypass the movable pulley 6 on the top of the propelling cylinder piston rod 81, and then enter the fishing winch 5, and the fishing winch 5 The front salvage wire rope cable connection is connected. Both the movable pulley 6 and the fixed pulley 3 are provided with a protection device to prevent the fishing rope from jumping.

The wire rope double-stroke propulsion mechanism 7 includes two upper wire ropes and two lower wire ropes; a set of fixed pulleys is respectively arranged on the top of the front and rear sides of the drilling power head slide frame 1, and each fixed pulley includes two Two pulleys, both of which are equipped with protection devices to prevent fishing rope from jumping. A set of fixed pulleys are respectively provided at the bottom of the front and rear sides of the drilling power head slide frame 1, and each set of fixed pulleys includes two pulleys, and the two pulleys are each equipped with a protection device to prevent the fishing wire rope from jumping. The front and rear sides of the top of the propulsion cylinder piston rod 81 are respectively provided with two pulleys, and the two pulleys are arranged up and down, and the two pulleys are each equipped with a protection device to prevent the fishing rope from jumping off the groove. One of the two upper wire ropes is located on the front side of the drilling power head slide rail frame 1, one end of which is connected to the top of the drilling power head slide rail frame 1, and the other end bypasses the front side of the top of the propelling cylinder piston rod 81 in turn. The upper pulley and a set of fixed pulleys on the top of the front side of the drilling power head slide frame 1 are connected to the drilling power head 10. The other upper wire rope is located on the rear side of the drilling power head slide rail frame 1. One end of the upper wire rope is connected to the top of the drilling power head slide rail frame 1, and the other end in turn bypasses the rear side of the top of the propelling cylinder piston rod 81. The upper pulley and a set of fixed pulleys on the top of the rear side of the drilling head carriage 1 are connected to the drilling head 10.

One of the two lower wire ropes is located on the front side of the drilling power head slide rail frame 1, one end of which is connected to the bottom of the drilling power head slide rail frame 1, and the other end bypasses the front of the advance cylinder piston rod 81 in sequence. The lower pulleys on the side and a set of fixed pulleys on the bottom of the front side of the drilling power head slide rail frame 1 are connected to the drilling power head 10. The other lower wire rope is located on the rear side of the drilling power head slide rail frame 1, one end of the upper wire rope is connected to the bottom of the drilling power head slide rail frame 1, and the other end bypasses the rear side of the top of the propelling cylinder piston rod 81 in turn. The lower pulley and a set of fixed pulleys at the bottom of the rear side of the drilling power head slide frame 1 are connected to the drilling power head 10. When the propelling cylinder piston rod 81 moves upwards and its moving distance is s, since the pulley on the top side of the oil cylinder piston rod 81 is a moving pulley, the moving distance of the connection between the upper and lower steel ropes and the drilling power head 10 is 2s. ; That is, the drilling power head 10 moves down a distance of 2s. Similarly, when the downward movement distance of the propelling cylinder piston rod 81 is s, the drilling power head 10 moves upward by a distance of 2s.

Example 2

As shown in FIG. 2, similar to Embodiment 1, the only difference is that the fixed wire pulley set for fishing wire rope includes not only the fixed wire pulley 3 provided on the top of the power head slide rail frame 1 and the movable wire pulley installed on the top of the piston rod 81 of the propelling cylinder. 6; It also includes an auxiliary fixed pulley 12 provided on the side of the drilling power head slide rail 1 facing away from the drilling power head 10, and the auxiliary fixed pulley 12 can also be installed on the subsea drilling machine frame. After the fishing wire rope 9 bypasses the movable pulley 6 on the top of the piston rod 81 of the propulsion cylinder, it is not directly connected to the fishing winch 5, but bypasses the auxiliary fixed pulley 12 fixed on the submarine rig frame or the power head slide rail. The fixed pulley set enters the fishing winch 5 and is connected to the fishing wire rope cable arrangement at the front of the fishing winch 5. The auxiliary fixed pulley 12 or the fixed pulley group is provided with a protection device to prevent the fishing rope from jumping.

In the above-mentioned Embodiments 1 and 2, the fixed pulley 3 for drilling the top of the power head slide rack 1 or the movable pulley 6 for advancing the top of the piston rod 81 of the oil cylinder has more than one pulley, but uses a plurality of pulleys. Pulley set.

In the above embodiments 1 and 2, the fishing wire rope fixed pulley block (including the fixed pulley block drilled on the top of the power head slide rail frame 1, the movable pulley block pushed on the top of the cylinder piston rod 81 and the subsea rig frame or drilling power The auxiliary fixed pulley set on the head rail rack 1) is provided with a protection device 2 for preventing the fishing rope from jumping.

Claims

An oil-cylinder double-stroke submarine rig rope coring device includes a drilling power head, a drilling power head slide rail frame, a propelling oil cylinder and a wire rope double-thrust propulsion mechanism, a core inner tube fishing head, a fishing wire rope, and a fishing wire rope. The pulley block and the fishing winch, the propulsion cylinder can drive the drilling power head up and down through the wire rope double-pass propulsion mechanism; it is characterized in that a through hole communicating with the drill pipe is opened on the top of the drilling power head, There are fixed pulleys. There is a movable pulley on the top of the piston rod of the propelling cylinder. The fishing winch is fixedly installed on the submarine rig frame or the drilling power head slide rail. The core inner tube fishing head is connected with the fishing wire rope and suspended on the drilling power head or Inside the drill pipe connected to the drilling power head; the salvage wire rope connected to the core inner tube salvage head goes up through the through hole at the top of the power head, bypasses the fixed pulley on the top of the power head slide rail, and then Pass the moving pulley at the top of the piston rod of the cylinder, and then enter the fishing winch.
The double-stroke advancing type submarine rig rope coring device according to claim 1, characterized in that after the fishing wire rope bypasses the movable pulley on the top of the piston rod of the propulsion cylinder, it does not directly enter the fishing winch but is fixedly installed on the subsea rig The auxiliary fixed pulley on the rack or drilling power head slide rack enters the fishing winch.
The rope-cylinder double-stroke submarine rig rope coring device according to claim 1 or 2, characterized in that: fixed for fixedly installed on the slide head frame of the drilling power head or the submarine rig frame for steering of the fishing wire rope The moving pulley on top of the piston rod of the propelling cylinder uses a pulley set composed of multiple pulleys.
The rope-cored device for an oil-cylinder double-stroke submarine drilling rig according to claim 3, characterized in that: a fixed pulley or a fixed pulley group drilled into the top of the power head slide frame, a movable pulley or a movable pulley group pushed into the top of the piston rod of the cylinder, and the subsea The auxiliary fixed pulley or auxiliary fixed pulley group on the drilling machine rack or drilling power head slide frame is provided with a protection device to prevent the fishing wire rope from jumping.
The double-stroke advancing submarine rig rope coring device according to claim 1 or 2, characterized in that the front part of the fishing winch is provided with a fishing wire rope cable arrangement.