hydraulic power tong 40 000 manufacturer

If you’ve worked with us before, you’ll know what we mean. We are remarkably dedicated to the success of our customers. That’s what drives us and everything we do. From the bottom up, we’ve built our company to deliver the highest quality hydraulic tongs faster than anyone else.

Eckel�s 9⅞ HS-40 Tubing / Casing providing high torque and high continuous rotational torque that you can trust within a compact operational footprint featuring SPACE SAVER® technology.

The 9⅞ HS-40 Tubing / Casing is the result of months of engineering and extensive stress analysis that insures higher performance, reliability, and long life. Eckel 9⅞ HS-40 provides world-class performance with up to 40,000 ft-lbs maximum torque. The tong features our new patented CASE STIFFENER technology that enhances overall torque output. Having a high full 360� rotational torque and speed-shifting capability insures the tong can makeup special torque-turn connections that require continuous rotation. A two-speed Hydra-Shift® motor is coupled with a two-speed gear train to provide (4) torque levels and (4) HS- speeds allowing the operator remarkable control of the connection.

Tong dimensions are a critical design aspect that our engineers worked to reduce for today�s smaller rigs. The result was having one of the industry�s smallest operational footprints tongs for its capacity and torque. The patented SPACE SAVER® door that hydraulically opens vertically, allowing for the tong to work in a much smaller operational area on rig floors and is also less labor-intensive operating. The door opens to the opposite side of the tong operator, allowing full view of the tong throat area while positioning the tong on the tubular. A fast 2-second door operation is all that is required to open or close the door.

The safety door interlock prevents tong operation when the tong door is open. Now enclosed within the tong body, providing tamper-resistant concealment from operator circumvention. Accidental damage of the door interlock by hydraulic fluids, tubular connection, or other external forces is also greatly minimized. A front panel provides access to the door inter-lock for any maintenance required

The 9⅞ HS-40 Casing Tong offers exceptional gripping capabilities handling tubular size from 3½ - 9⅞ in. (88.9 - 250.8) and WD Tri-Grip® Backup size 3½ - 11 in. (88.9 - 279.4). An innovative design allows you to choose either sliding heads or pivot heads configuration upon order. Wrap-Around dies are offered which securely encompass the tubular to limit potential for damage. Therefore, you are assured of your down hole tubular connection integrity.

Casing Tongs provide make-up and break-out capabilities when running casing tubular in the drill hole to maintain well integrity. Casing tongs are available for various sizes from 5-1/2" to 36" and designed to handle high torque casing or lightweight casing. Available models: Standard, Hydra-Shift, High Torque, and Ultra High Torque with torques ranging from 15,000 ft-lbs up to 200,000 ft-lbs. Consistent operations between models reduce employee training.

In assembling a string of tubing for an oil well, a long series of pipe sections are screwed together, usually by means of a power tongs. Conventional power tongs have jaws with serrated faces that are designed to bite into the pipe surface. These jaws are usually cam operated, so that their closing force is roughly proportional to the tongs torque. Such an arrangement, however, is unsuitable for certain modern tube materials which are particularly soft. This is true for example, for some high chromium pipes designed for corrosion resistance rather than strength, and for fiber glass tubing now being developed. There are also pipes having protective coatings designed to protect the underlying material from corrosion by hydrogen sulfide and other subterranean chemicals. Some tubing costs on the order of one thousand dollars per foot, and a string is typically thousands of feet long. Plainly, it is critical not to damage tubing while making up a string, and to avoid any surface damage that could reduce service life.

Consequently, there is a need for power tongs whose jaws will not injure the surface of tubing and yet can deliver to the tubing adequate torque, which may be several thousands foot-pounds. The approach taken by this invention is to provide jaws actuated by hydraulic linear motors so that jaw pressure can be accurately controlled.

Hydraulically biased jaws on power tongs are known in the prior art; see, for example, U.S. Pat. Nos. 3,796,418, 3,921,473, 4,057,887 and No. 4,402,293. None of these however, provide means for independently controlling the jaw force.

It is therefore an object of this invention to construct a power tongs having jaws designed not to bite into the surface of pipe or tubing and yet able to transfer sufficient torque to the tubing.

Another object is to control jaw pressure independent of tongs torque. These and other objects will be apparent from the following description of a preferred embodiment of the invention.

The foregoing objects are met, according to this invention, by a power tongs having at least one hydraulically biased jaw, and means for controlling the hydraulic pressure delivered to the jaw. With this arrangement, smooth-faced jaws made of soft material can be used, and purely frictional engagement with the pipe surface suffices to make up the string.

As shown in FIGS. 1 and 2, an apparatus embodying the invention comprises a power tongs 10 including a motor 12 driven by hydraulic fluid or other medium. Means (not shown) are provided for manually or automatically controlling the tongs motor. The tongs motor 12 is connected through gearing, not shown, to a rotary head 14, to which the pipe gripping assembly 20 of the invention is attached. The gripping assembly comprises plural (preferably three) segments 22a, 22b, 22c equally spaced around a vertical axis corresponding to that of a pipe P that is to be torqued.

Referring to FIG. 2, at least one segment, 22b, includes at least one (preferably two) short stroke hydraulic cylinders 32, each containing a piston 34 for driving a jaw 36 radially inward against the pipe P. The jaw 36, which is mounted in a slot 38 for free movement only in the radial direction, is preferably made of a soft material, such as aluminum, so that it will not scratch through pipe coatings, or damage pipes made of soft material. The hardness of the jaws thus may vary, according to the intended pipe material. For fiberglass pipe, the jaws may be harder than the pipe.

The gripping face 40 of each jaw is (FIG. 3) preferably smooth; that is, without teeth or other contours that might cut into and damage the pipe surface. This is particularly important for coated pipe, but as an alternative, the jaw surfaces may be "corrugated" as illustrated in FIG. 4. For fiberglass pipe, where surface damage can be tolerated, a serrated, knurled or toothed surface (FIG. 5) is preferred.

FIG. 6 shows a schematic of the fluid circuit of this invention. An external compressed air source 42 is connectable, via a quick-connect fitting 44, to an air-driven hydraulic pump 46 mounted on the gripping device beneath an oil reservoir 48. The pump outlet communicates with the cylinders 32, in parallel, through a check valve 50 which prevents retrograde flow. A manually adjustable pressure relief valve 52 serves as means for controlling fluid pressure by bleeding excess pressure back to the reservoir. A manually operable, normally closed valve 54 can be opened to bleed all pressure from the cylinders 32 when it is desired to release the pipe. A gauge 56 indicates the actual cylinder pressure.

In operation, the tongs are brought, laterally, over a pipe joint P, FIG. 1, and the gripping assembly 20 is closed around the pipe by means of the latch 26. Air pressure from source 42 is then applied via fitting 44, whereupon the pump 46 generates hydraulic pressure within the cylinders 32, which pressure is limited by the setting of the pressure relief valve 52. The check valve 50 maintains the cylinder pressure after the air source is disconnected, whereafter there are no external hoses or other connections to the gripping device that would prevent it from rotating. The tongs are then activated, causing the gripping device and the pipe P to rotate with the rotary head until the desired torque is reached. Various torque limiters, such as those disclosed in U.S. Pat. Nos. 4,552,041 and 4,579,024, may be used to control the tongs, if desired.

To release the pipe P, the valve 54 is opened, allowing the pistons 34 to be retracted by their biasing springs as fluid escapes to the reservoir 48. The device may then be unlatched, and the tongs are then removed from the pipe.

The adjustability of the relief valve 52 enables one to control the actual clamping jaw force, independently of tongs torque. It is therefore possible, with this invention, to avoid excessive clamping pressures that could cause surface or structural damage to soft pipes. The service life of some of the most expensive tubing can thus be markedly prolonged. The pressure reaching cylinders 32 is limited by means of the adjustable pressure relief valve 52, which is set to a pressure that is a function of pipe material, size, makeup torque and possibly other factors. The upper pressure limit, for a given size jaw, is necessarily that pressure which would collapse or crush the pipe. However, the jaws may be made as long as desired; e.g., one foot long or more, so as to distribute jaw load over a greater surface area. As a result, by judicious design choice, any desired torque can be transferred to the pipe by the gripping assembly, without damaging the pipe surface.

With this invention, jaw forces are positively controlled and limitied, without regard to the tongs torque. This is in complete contrast to traditional cam-operated jaws, where jaw force is roughly proportional to tongs torque and is usually unknown in magnitude.

We have found that aluminum jaws with no teeth or surface irregularities whatsoever can be used with this invention. As long as the hydraulic cylinder pressure is properly set and controlled, such jaws are capable of developing very high torques through purely frictional engagement with the pipe surface. Since contact with the pipe is purely compressional, surface discontinuities are not created.

Various other modifications will occur to those of skill in the art, to create other uses for the invention. For example, the gripping device could be used in a (non-rotary) backup tongs. Also, high pressure water could be used in place of hydraulic fluid to drive the pistons 34, and such a modification would avoid the release of oil into the environment.

Established in 1958, Eckel is globally recognized as the leading manufacturer of hydraulic power tongs and hydraulic power units for the world’s oil and gas industries. We offer a full line of hydraulically operated drill pipe tongs, casing tongs, tubing tongs, hydraulic backups, hydraulic power units, and tong positioning equipment. Eckel delivers a comprehensive range of tongs from 2-1/16 through 36 in. for the most demanding onshore and offshore environments. Eckel Tri-Grip® backup is an industry standard for reliable make-up and break-out of tubular connections. Eckel’s cutting-edge designs, quality, and rugged durability have won us a world-wide reputation of a first-class product that insures years of trouble free service.

From our main manufacturing facilities in Odessa, Texas, USA (ISO 9001:2008 certified) essentially every part is designed and manufactured. The facility encompasses 140,663 square feet and houses the latest in design tools and numerically controlled machines and heat treating ovens.

Eckel high-performance tongs operate in some of the toughest operating environments around the world performing drill pipe, casing and work-over activities on onshore and offshore locations. Eckel is highly involved in drilling, well servicing, and work-over operations.

We offer a full range of high quality casing and tubing, drill pipe tongs for use in all types of oil and gas drilling, well completion and well servicing activities. Our tongs have been engineered for the high operational torques today’s that premium connections require. Eckel tongs continue to advance the technology of tool service and setting industry standards.

Our renowned free floating Tri-Grip® hydraulic backup provides unparalleled backup performance and is one of the industry’s closest tong mounting backups that minimize pipe bending. The backup utilizes three biting surfaces to insure a secure grip on the tubular to prevent tubular rotation.

Our remotely operated tongs provides a mean to control the tong for make-up and break-out operations. The tong is based upon the standard tong and backup configuration with the exception of hydraulic cylinders on the unit for remote control of the operations of the tong and backup. The functions include the tong door, backing pin, mechanical gear shift, power tong rotation, motor speed and backup gripping. Totally hydraulic with no electrical or electronic devices.

Eckel’s standard diesel or electric power packages at 65 GPM and 2,500 psi (246 LPM / 172 bar) are widely recognized for dependability and long, trouble-free service. Eckel will customize hydraulic power systems in the shortest possible time to meet “nonstandard” requirements for space, fluid flow, auxiliary power, and portability. Diesel driven units are optionally supplied with automatic shutdown systems to prevent engine run away when explosive gases are present. Additional shut downs include engine oil temperature, oil pressure, and fan belt breakage. All controls are either air, mechanical or electrical.

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