Hook load

The mechanical output of the motor for crimes iind hoists in lifting the hook load is the useful work done by it. The losses produced in the crane or hoist mechanism are taken into account by the mechanical efficiency of the hoisting mechanism. 

Mast setup distance The distance from the centerline of the well to a designated point on the mast structure defined by a manufacturer to assist in the setup of the rig. Maximum rated static hook load The sum of the weight applied at the hook and the traveling equipment for the designated location of the dead line anchor and the specified number of drilling lines without any pipe setback, sucker rod, or wind loadings. 

Static hook load see Maximum Rated Static Hook Load. 

Under the rigging conditions given on the nameplate, and in the absence of setback or wind loads, the static hook load under which failure may occur in masts conforming to this specification can be given as only approximately twice the maximum rated static hook load capacity. 

The manufacturer shall establish the reduced rated static hook loads for the same conditions under which the maximum rated static hook loads apply, but with the addition of the pipe-setback and sucker-rod loadings. The reduced rated static hook loads shall be expressed as percentages of the maximum rated static hook loads. Thus, the portable mast ratings in Standard 4D include a safety factor of 2 to allow for wind and impact loads, and require the manufacturer to specify further capacity reductions due to setback. 

Each structure shall be rated for the following applicable loading conditions. The structures shall be designed to meet or exceed these conditions in accordance with the applicable specifications set forth herein. The following ratings do not include any allowance for impact. Acceleration, impact, setback, and wind loads will reduce the rated static hook load capacity. 

Maximum rated static hook load for a specified number of lines to the traveling block. 

Rated static hook load for wind velocities varying from zero to maximum rated wind velocity with full rated setback and with maximum number of lines to the traveling block. 

Hook load, wind load, vessel motions, and pipe setback in combination with each other for the following ... 

Maximum rated static hook load, if applicable. 

Loads due to impact, acceleration, and deceleration may be indicated by fluctuation of the weight indicator readings and the operator should keep the indicator readings within the required hook load capacity. 

Thus, for the static condition (i.e., no friction losses in the sheaves at the blocks), F, (lb), the force in the fast line to hold the hook load, is... 

When the hook load is lifted, friction losses in crown block and traveling block sheaves occur. It is normally assumed that these losses are approximately 2% deduction per working line. Under dynamic conditions, there will be an efficiency factor for the block and tackle system to reflect these losses. The efficiency will be denoted as the hook-to-drawwork efficiency (e, ). The force in the fast line under dynamic conditions (i.e., hook is moving) will be... 

Toi calculate the design factor for multipart string-ups,. Figures 4-fiS and 4-69 can be tisbd to determine the value of W. W is the-fast line tension and equals the fast line factor - times the hook-load weight indicator. readinjg.- As an example, see. below , ..,. ... 

Location of deadline anchor, and its influence upon the maximum rated static hook load of derrick. 

Figure 4-393. Schematic of casing after a cementing operation. The hook load may be determined from Equation 4-331. This is...

As the cement slurry sets the hook load will decrease from its value just after the cementing operation. If the cement slurry sets up to the height (freeze point) indicated in Figure 4-392, and if the casing has been landed as cemented, then the hook load will be approximately... 

Determine the approximate hook load prior to the cementing operation. 

The hook load after the cement has set can be approximated by Equation 4-332, This is... 

No-touch freight — While some female drivers may pride themselves on being able to unload a trailer as adeptly as any man, if you have no-touch freight, or primarily drop-and-hook loads, your company may appeal to women who want to be drivers — not driversdumpers. 

Drilling fluids also support portion of drill-string or casing through buoyancy. Suspend in drilling fluid, buoyed by force equal to weight (or density) of mud, so reducing hook load at derrick. 

A qualified person has determined that the set-up and rated capacity of the crane/derrick (including the hook, load line and rigging) meets or exceeds the requirements in 1926.502(d)(15). 

Capacity Use of suspended personnel platforms. The total load (with the platform loaded, including the hook, load line and rigging) must not exceed 50 percent of the rated capacity for the radius and configuration of the equipment, except during proof testing. 

Capacity Hoisting personnel without a personnel platform. When hoisting personnel without a personnel platform pursuant to paragraph (b)(2) of this section, the total load (including the hook, load line, rigging and any... 

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