kelly bushing height made in china

Because wells are not always drilled vertically, there may be two “depths” for every given point in a wellbore: the measured depth (MD) measured along the path of the borehole, and the true vertical depth (TVD), the absolute vertical distance between the datum and the point in the wellbore. In perfectly vertical wells, the TVD equals the MD; otherwise, the TVD is less than the MD measured from the same datum. Common datums used are ground level (GL), drilling rig floor (DF), rotary table (RT), kelly bushing (KB) and mean sea level (MSL). [1]

Kelly Bushing Height (KB):The height of the drilling floor above the ground level. Many wellbore depth measurements are taken from the Kelly Bushing. The Kelly bushing elevation is calculated by adding the ground level to the Kelly bushing height.

The utility model relates to a friction kelly bushing used for the oriented vehicle. The friction kelly bushing comprises a kelly bushing main body (1), wherein an A-shaped groove (2) is arranged on the inner wall of the through hole of the kelly bar of the kelly bushing main body (1), the A-shaped groove (2) deviates from the original design of the center position on the inner wall of the of the through hole of the kelly bar, and a cable groove (4) and an insert plate (3) are arranged in the A-shaped groove (2). The friction kelly bushing cable is not easy to be squeezed, and therefore the time, the labor and the production cost are saved.

On the rig that in the oil drilling construction, uses, the drill with ferrule heart can be given kelly bar with the rotating disk transmission of power on ground, when directed in the past, cable channel is positioned at the center of inwall on the kelly bar through-hole wall, cable is easy to jump out from cable channel, the problem of squeezing bad cable often takes place, if place " A " type plate herein, owing to be subjected to the extruding force of kelly bar bigger, " A " groove is easy to destroyed, cause plate to insert not enter, cable is still jumped out easily by crowded bad, and squeeze bad cable 2-5 average every month, after cable squeezes badly, utilize the plenty of time to connect cable, also waste a large amount of cables sometimes, the cost height of wasting time and energy.

In order to solve the problem in the background technology, the utility model provides a kind of directed car friction master bushing, and this orientation car friction master bushing cable is difficult for being squeezed bad, the time saving and energy saving cost of production of having saved.

The technical solution of the utility model is: this orientation car friction master bushing comprises the master bushing body, the kelly bar through-hole wall of master bushing body has " A " type groove, " A " type groove departs from kelly bar through-hole wall center, in " A " type groove cable channel and plate is arranged.

The utlity model has following beneficial effect: each position force analysis when originally novel process is to crowded bad cable reason and orientation; cable channel is moved to the side; kelly bar is little to the side extruding force; effectively protect " A " type groove and cable; make cable prolong the time saving and energy saving cost of production of having saved application life.Have plate in " A " type groove simultaneously, prevent that like this cable from jumping out in cable " A " type groove, plate upper end inflection 90 degree, be stuck in the master bushing body above, prevent that plate from skidding off, it is quite convenient to insert simultaneously and take out.By using many mouthfuls of wells, effect is very obvious.

The utility model is described in further detail below in conjunction with accompanying drawing: as shown in the drawing; this orientation car friction master bushing comprises master bushing body 1; the kelly bar through-hole wall of master bushing body 1 has " A " type groove 2; " A " type groove 2 departs from kelly bar through-hole wall center; depart from the stressed little effective protection cable in center; in " A " type groove 2 cable channel 4 and plate 3 are arranged, plate 3 prevents that cable from jumping out in cable " A " type groove 2.This novel friction master bushing is by using many mouthfuls of wells, and effect is very obvious.The time saving and energy saving cost of production of having saved.

1. friction master bushing that directed car uses, comprise master bushing body (1), it is characterized in that: the kelly bar through-hole wall of master bushing body (1) has " A " type groove (2), " A " type groove (2) departs from kelly bar through-hole wall center, and cable channel (4) and plate (3) are arranged in " A " type groove (2).

A pit in the ground to provide additional height between the rig floor and the well head to accommodate the installation of blowout preventers, ratholes, mouseholes, and so forth. It also collects drainage water and other fluids for disposal.†

A device fitted to the rotary table through which the kelly passes. It is the means by which the torque of the rotary table is transmitted to the kelly and to the drill stem. Also called the drive bushing.†

The derrickman"s working platform. Double board, tribble board, fourable board; a monkey board located at a height in the derrick or mast equal to two, three, or four lengths of pipe respectively.†

A hole in the rig floor 30 to 35 feet deep, lined with casing that projects above the floor. The kelly is placed in the rathole when hoisting operations are in progress.†

The hose on a rotary drilling rig that conducts the drilling fluid from the mud pump and standpipe to the swivel and kelly; also called the mud hose or the kelly hose.†

The principal component of a rotary, or rotary machine, used to turn the drill stem and support the drilling assembly. It has a beveled gear arrangement to create the rotational motion and an opening into which bushings are fitted to drive and support the drilling assembly.

Wedge-shaped pieces of metal with teeth or other gripping elements that are used to prevent pipe from slipping down into the hole or to hold pipe in place. Rotary slips fit around the drill pipe and wedge against the master bushing to support the pipe. Power slips are pneumatically or hydraulically actuated devices that allow the crew to dispense with the manual handling of slips when making a connection. Packers and other down hole equipment are secured in position by slips that engage the pipe by action directed at the surface.†

The top drive rotates the drill string end bit without the use of a kelly and rotary table. The top drive is operated from a control console on the rig floor.†

n: the machine used to impart rotational power to the drill stem while permitting vertical movement of the pipe for rotary drilling. Modern rotary machines have a special component, the rotary or master bushing, to turn the kelly bushing, which permits vertical movement of the kelly while the stem is turning.

LEE C. MOORE, Set back capacity 700 klb. Height to rotary beams 24 ft. Drill Floor Height 30 ft.; Complete with: Catwalk, 1 Set of Skidding Gear, Hydraulic jack up unit

When the well is spudded, reference is taken at wellhead usually Rotary Table Kelly Bushing (RTKB) or Below Kelly Bushing (BKB) to ensure what depth drill string is reached one should guess if reference is not taken how it will be known that where is the desired depth to stop the drilling further or where is the depth of perforation, the operator will stop drilling before the total depth or the perforations will be made few meters above the payzone therefore with the help of reference the distance of wellhead equipment is also counted with the depth of drillstring and this way engineer can meet the target.