CN201062495Y

CN201062495Y - Top-driven drilling device back-up tong assembly

Info

Publication number: CN201062495Y
Application number: CNU2007200104627U
Authority: CN
Inventors: 李伟; 周凯; 郝正强; 董金龙; 徐佩亮
Original assignee: TIANYI INDUSTRIAL Co Ltd LIAONING PROV
Current assignee: PANJIN LIAOHE OILFIELD TIANYI PETROLEUM EQUIPMENT COMPANY LTD.
Priority date: 2007-02-02
Filing date: 2007-02-02
Publication date: 2008-05-21
Anticipated expiration: 2017-02-02

Abstract

The utility model relates to a back-up tong assembly of a top drive drilling device, which is composed of a torsional force sleeve 1, a controlling oil cylinder 2, a spring 3, a hanging barrel 4, a pin bush 6, a bolt 7 and a back-up tong main body 5. The back-up tong main body is composed of a left tong body 8, a right tong body 9, a piston 10, a dental plate seat 13 and a pin axle 14, the pin bush 6 is arranged on one side of the opening at the top end of the torsional force sleeve 1, the upper end of the torsional force sleeve 1 is connected with the gyration head connecting flange 15 of a top drive device, the lower end of the torsional force sleeve 1 is connected with the hanging barrel 4, the controlling oil cylinder 2 is installed at the upper part on the inner side of the torsional force sleeve 1, the back-up tong main body 5 which composed of the left and the right tong bodies 8, and 9 is arranged at the lower part of the torsional force sleeve 1, the piston 10, the spring 11, and the dental plate seat 12 are respectively arranged in the left and the right tong bodies 8, and 9, and the left and the right tong bodies 8, and 9 adopt the structure of split flange type. The back-up tong wholly presents rectangle, adopts long tong tooth, when the upper shackle is clasped, the utility model is more reliable, tong teeth can be replaced by opening the mouth of the tong in any conditions, the spring in the tong body can prevent the piston from disoperation and ensure the piston and the tong body not to be frozen in winter, and the service performance of the utility model is enhanced.

Description

A kind of back tong for top-drive drilling unit assembly

Technical field:

The utility model relates to a kind of particularly special-purpose member of top-drive drilling of oil drilling that is used for, and belongs to the oil drilling machine equipment class.

Background technology:

Along with the development of top drive drilling technology with apply, top-drive drilling integral body and auxiliary component thereof have obtained continuous improvement and raising in production reality, and back-up tong is exactly one of them.At present, the more top-drive drilling of field by using mainly is to incline pendulum-type from the clip back pincers and the wafer type back-up tong that inclines out with back-up tong.These two kinds of back-up tongs all have opening replacing pincers tooth and the pendulum that can incline is opened from clamping function; be convenient to change increase and turn round device and protection joint; but the former intensity and sealing performance are relatively poor; winter the caliper easy freezing; the inner mud that easily immerses of Proximity switch; signal sends and is obstructed; move to promote caliper from the return unit insufficient pressure inside after stopping motor; can not satisfy the drilling well needs; latter's temperature in the winter time hangs down under the situation; existence or generation caliper freeze and clamp phenomenons such as tooth is short, clamping force is little, piston can not move, and can not satisfy instructions for use.

The utility model content:

The purpose of this utility model is to provide that a kind of clamping force is strong, favorable working performance, can adapt to the back tong for top-drive drilling unit assembly of production operation in winter and long service life.

The utility model is to realize like this.This kind back-up tong assembly by Torque sleeve, guide, bolt, control oil cylinder, spring, hang the tube and the back-up tong main body form, the back-up tong main body is made of left and right caliper, piston, dental lamina seat and bearing pin.Torque sleeve top end opening place one side is provided with guide, and the upper end is connected with the top driving device swiveling head adpting flange of top by the bolt that is located at the opening opposite side, the lower end by flat key with hang the tube be connected; The Torque sleeve inside upper part is equipped with the control oil cylinder, and the bottom is provided with the back-up tong main body; The back-up tong main body is made of left and right two calipers, is respectively equipped with piston, spring in the left and right caliper and the dental lamina seat of dental lamina is housed on it, and left and right caliper is an opposite opened, is connected with 4 bearing pins.During work, the left and right caliper of back-up tong is connected with bearing pin, control in-oil cylinder hydraulic oil during last shackle and promote piston forward and move, finish shackle and clamp action, hydraulic oil promotes that piston is mobile backward to be resetted then.When changing parts, the bearing pin of right caliper body one side is pulled down, whole back-up tong is inclined out, promptly replaceable pincers tooth or tool joint and finish other operation.

The utility model compact conformation, installation and maintenance are convenient, because its back-up tong main body is square in appearance, and adopt the alligator pliers tooth, the contact area of pincers tooth and drilling rod is increased, last shackle clamps more reliable, and under any circumstance all jaw can be inclined open and change the pincers tooth, spring in the caliper can be avoided the misoperation of piston and guarantee that piston in winter, caliper do not freeze, its functional performance is improved, the change of oil cylinder position can prevent that piston rod is subjected to the scratching of outer Jie's power, reduces mud-corrosion, prolongs oil cylinder application life.

Description of drawings:

Fig. 1 is a general structure schematic diagram of the present utility model.Among the figure, label " 15 " drives drilling rig swiveling head adpting flange for the top, and label " 16 " drives the drilling rig inner blowout preventer for the top.Fig. 2 is the utility model view of inclining out.Fig. 3, Fig. 4 are respectively the A-A sectional schematic diagram among Fig. 1 under clamped condition and the open mode.

The specific embodiment:

The utility model is provided by following examples, is illustrated below in conjunction with accompanying drawing.

As shown in the figure, the utility model is by Torque sleeve 1, control oil cylinder 2, spring 3, hang tube 4, guide 6, bolt 7 and back-up tong main body 5 are formed, back-up tong main body 5 is by left caliper 8, right caliper body 9, piston 10, dental lamina seat 12, dental lamina 13, bearing pin 14 constitutes, its structure, assembled relation is as follows: Torque sleeve 1 top end opening place one side is provided with guide 6, the upper end is connected with the top driving device swiveling head adpting flange 15 of top by the bolt 7 that is located at the opening opposite side, the lower end by flat key with hang tube and 4 be connected, Torque sleeve 1 inside upper part is equipped with control oil cylinder 2, the bottom is provided with by a left side, right two calipers 8, the 9 back-up tong main bodys 5 that constitute, a left side, right caliper body 8, be respectively equipped with piston 10 in 9, the spring 11 and dental lamina seat 12 of dental lamina 13 is housed on it, a left side, right caliper body 8,9 is opposite opened, is connected with 4 bearing pins 14.Wherein, left caliper 8, right caliper body 9 are opposite opened, and outward appearance is square, bilateral symmetry on shape, the structure, be connected with 4 bearing pins 14 therebetween, two caliper inboards are respectively equipped with piston 10, spring 11 and the dental lamina seat 12 of dental lamina 13 are housed on it, and dental lamina 13 adopts the alligator pliers tooth.Torque sleeve 1 is the pipe body of a side opening, and the bottom inner headed face is provided with the upper and lower shoulder that oil cylinder 2 usefulness are set.

Claims

1. back tong for top-drive drilling unit assembly, by Torque sleeve (1), control oil cylinder (2), spring (3), hang tube (4), guide (6), bolt (7) and back-up tong main body (5) are formed, back-up tong main body (5) is by left caliper (8), right caliper body (9), piston (10), dental lamina seat (12), dental lamina (13), bearing pin (14) constitutes, it is characterized in that: Torque sleeve (1) top end opening place one side is provided with guide (6), the upper end is connected with the top driving device swiveling head adpting flange (15) of top by the bolt (7) that is located at the opening opposite side, the lower end by flat key with hang the tube (4) be connected, Torque sleeve (1) inside upper part is equipped with control oil cylinder (2), the bottom is provided with by a left side, right two calipers (8), (9) the back-up tong main body (5) of Gou Chenging, a left side, right caliper body (8), (9) be respectively equipped with piston (10) in, spring (11) and the dental lamina seat (12) of dental lamina (13) is housed on it, a left side, right caliper body (8), (9) be opposite opened, outward appearance is square, and uses 4 bearing pins (14) to be connected therebetween.