CN2321935Y

CN2321935Y - Light top driving device with novel structure

Info

Publication number: CN2321935Y
Application number: CN 98201438
Authority: CN
Inventors: 李金祥; 沈泽俊
Original assignee: Research Institute Of Petroleum Exploration And Development Cnpc
Current assignee: Research Institute Of Petroleum Exploration And Development Cnpc
Priority date: 1998-02-24
Filing date: 1998-02-24
Publication date: 1999-06-02
Anticipated expiration: 2008-02-24

Abstract

The utility model relates to a light top driving device with novel structure. A clamping back pliers is in a circular oil cylinder structure. A circular piston is arranged in a circular cylinder. An endwise slip block is arranged at the lower part of the circular piston, and is connected with a sliding block in radial direction by a connecting rod. The inner of the sliding block in the radial direction is a vice jaw. The structure of a return turning head mechanism and a rotary seal structure are simplified due to the adoption of the clamping back pincers which has small size and big clamping force and does not rotate with a suspension ring and an elevator, and a soft landing mechanism and a locking mechanism are canceled. As a result, except a main electricity motor, the utility model has the advantages of compact structure and convenient dismounting and maintenance, and improves the reliability of working particularly.

Description

A kind of light top-drive device of novel structure

The utility model relates to drilling rig, and particularly a kind of annular cylinder drilling rod clamps the top-drive drilling of back-up tong.

Have seven companies of five countries to produce various types of top-drive devices now abroad, last shackle mechanism is part and parcel very in the top-drive device.But no matter be shackle mechanism on the self-balancing type, the structure (self-balance tong) that is adopted as the DDM500 of MH company type, still the back-up tong formula structure (back up tong) that most of manufacturer adopted is all along with suspension ring, elevator rotate (see figure 1) together, and whole rotating part is referred to as swiveling head (rotating head).Only require that from drilling technology suspension ring drive elevator and freely rotate, or aim at quadruple board platform discharging drilling rod; Or go rat hole to grasp drilling tool; Or put after when normal drilling well.The reason that last shackle mechanism follows the suspension ring elevator to rotate together is that the space is limited between two suspension ring, and the existing various shackle mechanism size of going up is all bigger on the suspension ring swaying direction, if go up shackle mechanism and then suspension ring rotate together, will interfere.

The purpose of this utility model promptly is to follow the suspension ring elevator to rotate the problem that on suspension ring swaying direction size is big and be easy to interfere together at going up shackle mechanism in the above-mentioned prior art, and a kind of light top-drive device of novel structure is provided, it is the clamping back-up tong mechanism that adopts an annular cylinder application of force.Effective application of force area of annular cylinder is big, and appearance and size is little, and whole back-up tong can be done very for a short time, and profile is cylindrical, can be placed between the suspension ring, can't interfere when elevator rotates when suspension ring drive.

The purpose of this utility model is to be achieved through the following technical solutions: a kind of light top-drive device of novel structure, comprise rings seat (11), suspension body (13), clamp back-up tong (14), reaction torque arm (15), suspension ring (17) and preventer controlling organization (19), clamping back-up tong (14) is a kind of annular cylinder structure, annular cylinder letter (25) is housed in its caliper (24), annular piston (26) is housed in annular cylinder barrel (25), annular piston (26) the bottom piece (21) that endwisely slips, and by connecting rod (22) with radially slide piece (23) and be connected, the inboard that radially slides piece (23) is jaw, is inlaid with dental lamina (30) on jaw; Back-moving spring (29) is housed below the piece that endwisely slips (21).The extension, bottom (12) of suspension body (13) and deceleration box (2) is to be threaded togather, and rings seat (11) is seated in above the suspension body (13).The reaction torque arm (15) that clamps back-up tong (14) directly is connected with suspension body (13).Preventer controlling organization (19) directly is connected with suspension body (13).

The utlity model has following advantage: adopt the annular of not rotating to clamp back-up tong with the suspension ring elevator, simplified the mechanism of swiveling head greatly, the suspension body of marmon clamp clencher (hanging body) is become one with deceleration box, the mechanism that handles the inner blowout preventer motion also combines therewith, so the oil duct of the oil cylinder of control loops clevis clencher and inner blowout preventer does not need through rotary dynamic seal.Thereby only remaining 2 of rotary dynamic seal work oil ducts are promptly controlled the oil duct that suspension ring tilt.All the motion parts of rotation is suspension ring, elevator and rings seat.Since rings seat directly be seated in the fixed all-in-one-piece suspension body of reduction box on, soft landing mechanism and retaining mechanism have also omitted.It is very simple compact that entire top drive unit body seems, but various functions such as rotation, inner blowout preventer, clamping back-up tong are available in all varieties.

The drawing of accompanying drawing is described as follows:

Fig. 1 is existing top-drive device structure chart

Fig. 2 is a top-drive device structure chart of the present utility model

Fig. 3 a, 3b are that annular clamps the back-up tong structure chart

As shown in Figure 2, top-drive device of the present utility model is made up of component such as rings seat 11, suspension body 13, clamping back-up tong 14, reaction torque arm 15, suspension ring 17 and preventer controlling organizations 19, because the top-drive device structure of this novel structure is very simple, the retaining mechanism that does not have swiveling head, because it is fixed clamping back-up tong, reaction torque acts directly on the deceleration box 2, so do not need retaining mechanism, also do not have soft landing mechanism, the extension, bottom 12 of suspension body 13 and deceleration box 2 is to be threaded togather.Rings seat 11 is seated in above the suspension body 13, and the reaction torque arm 15 that clamps back-up tong 14 directly is connected with suspension body 13, and preventer controlling organization 19 also directly is connected with suspension body 13.Dynamic sealing device 16 between suspension body 13 and drilling rod cover has only two work oil ducts 18.

Fig. 3 a, 3b are depicted as the concrete structure that clamps back-up tong 14, annular cylinder barrel 25 is housed in caliper 24, in annular cylinder letter 25, annular piston 26 is housed, the oil input channel 27 that pressure oil is arranged on caliper 24 tops, in annular cylinder barrel 25 bottoms return oil duct 28 is arranged, the piece 21 that endwisely slips in the bottom of annular piston 26 is connected with connecting rod 22 by pin on the piece 21 that endwisely slips, the other end of connecting rod 22 then with radially slide piece 23 on pin be connected.The inboard that radially slides piece 23 is jaw, and is inlaid with dental lamina 30 on jaw.It shown in Fig. 3 a the jaw clamped condition, promptly when annular piston 26 when the effect of pressure oil moves down, impeller-hub moves down to sliding shoe 21, and compression is contained in the back-moving spring 29 below the piece 21 of endwisely slipping, because the length of connecting rod 22 is constant, radially slide piece 23 generation radial displacements clamping drilling rods 1 thereby must make, this moment, clamping force was the comprehensive function result of oil pressure and spring force.

Fig. 3 b is depicted as releasing orientation, when pressure oil when return oil duct 28 is let out back, back-moving spring 29 makes axial slider 21 promote annular pistons 26 and moves up, because the length of connecting rod 22 is constant, must drive and radially slide piece 23 generations outside moving radially, thereby unclamp drilling rod 1.

Claims

1. the light top-drive device of a novel structure, comprise rings seat (11), suspension body (13), clamp back-up tong (14), reaction torque arm (15), suspension ring (17) and preventer controlling organization (19), it is characterized in that: clamping back-up tong (14) is a kind of annular cylinder structure, annular cylinder barrel (25) is housed in its caliper (24), annular piston (26) is housed in annular cylinder barrel (25), annular piston (26) the bottom piece (21) that endwisely slips, and by connecting rod (22) with radially slide piece (23) and be connected, the inboard that radially slides piece (23) is jaw, is inlaid with dental lamina (30) on jaw; Back-moving spring (29) is housed below the piece that endwisely slips (21).

2. the light top-drive device of a kind of novel structure according to claim 1, it is characterized in that: the extension, bottom (12) of suspension body (13) and deceleration box (2) is to be threaded togather, and rings seat (11) is seated in above the suspension body (13).

3. the light top-drive device of a kind of novel structure according to claim 1 is characterized in that: the reaction torque arm (15) that clamps back-up tong (14) directly is connected with suspension body (13).

4. the light top-drive device of a kind of novel structure according to claim 1, it is characterized in that: preventer controlling organization (19) directly is connected with suspension body (13).