CAPITULO 4 HERRAMIENTAS Y EQUIPOS EN EL PISO DE TRABAJO .
4.1.- Características y manejo de las llaves de fuerza manuales e hidráulicas. Llaves mecánicas de fuerza Las llave lavess más más uti utiliza lizada dass en los los traba rabajo joss del del área área de Perf Perfor orac aciión y Mantenimiento de pozos se describirán a continuación:
Llave tipo “C” para tuberías de perforación y lastrabarrenas.
SUPER C Llaves manuales para tubería de perforación y tubería de revestimiento Rango de de to torque 35 35,000 000 ftft. Lb Lbs.
Rango 23 /8” – 103 /4” Intercambiable: BJ BJ “C “C”, BV BV-35
P/N
DESCRIPCIÓN
619-1 9-101-0 1-0301
Llaves W/ W/401/2” Lever & 3 1/2”-51/4” Lug Jaw
31/2” - 51/4”
619-1 9-101-0 1-0302
Llaves W/ W/401/2” Lever & 3 1/2”-51/4” Lug Jaw
31/2” - 51/4”
617-101-0330
Llaves de fuerza.
23/8” - 35/8”
617-101-0329
Llaves de fuerza.
2 7/8” - 41/4”
617-101-0321
Llaves de fuerza.
31/2” - 51/4”
617-101-0333
Llaves de fuerza.
51/4” – 7”
618-101-0423
Llaves de fuerza Assy
7” – 8 5/8”
617-101-0423
Llaves de fuerza solamente
7” – 85/8”
617-101-0426
Bisagras de la llaves de fuerza
7” – 85/8”
618-101-0424
Seguros de las llaves de fuerza Assy
9” – 103/4
617617-10 1011-04 0424 24
Segu Seguro ross de de las las llav llaves es de fuer fuerza za (sol (solam amen ente te))
9” – 103/4
617617-10 1011-04 0430 30
Segu Seguro ross de de las las llav llaves es de fuer fuerza za (sol (solam amen ente te))
9” – 103/4
125
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Llave tipo C Llave tipo “B” y “SDD” para tubería de perforación, lastrabarrenas y tuberías de revestimiento. Ver figuras abajo. SÚPER C Llaves Manuales Para Tuberías de Perforación y
Rango 2 3/8”- 10 ¾”
Tubería de Revestimiento.
Intercambiable: Intercambiable: BJ “C”, BV-35
Rango de Torque: 35,000 Ft. Lbs.
Llave tipo B.
P/N
DESCRIPCIÓN
619-10 619-101-0 1-0301 301
Llaves Llaves W / 40 ½” con Palanc Palanca a de 3 ½” -5 ¼”
3 ½”½”- 5 ¼”
619-101-0302
Llaves W / 30 7/8” con Palanca de 1/2” -5 1/4”
3 ½”- 5 ¼”
617-101-0330
Llaves de fuerzas
2 3/8”- 3 5/8”
617-101-0329
Llaves de fuerzas
2 7/8”- 4 1/4”
617-101-0321
Llaves de fuerzas
3 1/2”- 5 1/4”
617-101-0333
Llaves de fuerzas
5 1/4”- 7”
618-101-0423
Llaves de fuerzas Assy
7” - 8 5/8”
617-101-0423
Llaves de fuerzas (solamente)
7” - 8 5/8”
617-101-0426
Bisagras de las llaves de fuerzas
7” - 8 5/8”
618-101-0424
Seguros de la las llaves de fuerzas As Assy
9” -10 3/4”
617617-10 1011-04 0424 24
Segu Seguro ross de las las llav llaves es de fuer fuerza zass (sol (solam amen ente te))
9” -10 -10 3/4”
617-1 17-10 01-04 1-0430 30
Seg Seguros uros de las las llave lavess de de fue fuerz rza as (so (sola lam mente) nte)
9 5/8”-10 3/4”
SUPER B Llav laves
Manuales
para
tuberías
de
Perforación y Tub. de Revestimiento
Rango 3 1/2”- 13 3/8” Intercambiable: BJ “B”, BV-55
Rango de Torque: 55000 Ft. Lbs. P/N
DESCRIPCIÓN
616-101-01 616-101-0101 01
Llaves Llaves W / 48 ¾” con Palanca Palanca y Seguros Seguros
4”- 6 ¾”
619-1 19-10 01-01 1-0102 02
Llave lavess W / 42 ¾” con con Palanca a nca y Segu Seguro ross
4”- 6 ¾”
619619-10 1011-01 0134 34
Llav Llaves es de Fuer Fuerza za 35” 35” con con Pala Palanc nca a y Seg Segur uros os
4”4”- 6 ¾” ¾”
617-101-0121
Llaves de Fuerzas
3 1/2”-5”
617-101-0122
Llaves de Fuerzas
4 1/4”-6 3/4”
617-101-0123
Llaves de Fuerzas
6 5/8” - 9”
617-101-0129
Llaves de Fuerzas Assy
9” -10 3/4”
617-101-0124
Llaves de Fuerzas (Solamente)
7” -8 5/8”
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Instalación. La llave deberá suspenderse en un cable de acero flexible de 9/16” de diámetro, empleando una polea que se coloca a la altura del changuero del mástil del equipo. •
Un extremo del cable se fija a la barra de suspensión de la llave.
•
En el otro extremo se coloca un contrapeso, el cual debe estar situado en la parte inferior del piso de trabajo y tener el peso suficiente para que la llave pueda ser movida hacia arriba o hacia abajo por un solo hombre.
•
Posteriormente, asegúrese la llave con otro cable de acero con las mismas características.
•
Un extremo del cable se sujeta al perno que tiene la llave en el extremo lateral del brazo de palanca.
•
Asegure el otro extremo a la base del mástil.
•
Instale un conjunto de indicadores de torque (dinamómetro) de llaves, como el que se aprecia aprecia en la figura de abajo. Este Este aparato sirve sirve para el control y las medidas de torsión de la llave de fuerza.
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El indicador de torque (dinamómetro) consta de dos agujas: •
La aguja roja se emplea para fijar límites de fuerza aplicada.
•
La aguja negra permite una verificación precisa del torque requerido en el enro nrosqu sque de las juntas que se usa usan en tuber uberíías de perforaci ación y lastrabarrenas.
La colocación del indicador de torque puede ser dinamómetro o torquimetro. •
Portátil.
•
Permanente. Al conectar o desconectar tubería, la rotaria debe estar sin el candado, ya que
cuenta con dos llaves de fuerza. La mesa rotaria recibe energía de la transmisión mecánica del malacate o de su propio motor eléctrico.
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En la figura anterior, se aprecia la tubería, cuñas mesa rotaria, candado candado de la rotaria, cables salvavidas, posición correcta de la colocación de las llaves de fuerza y la forma correcta de colocarse del personal que la está operando. •
La de la izquierda se le conoce como llave de quebrar.
•
La de la derecha se le identifica como llave de apretar. El uso incorrecto de éste tipo de llaves es sumamente peligroso, ya que la
fuerza aplicada es tal que puede ocasionar daños personales de consecuencias graves, si no se prevén las posiciones posiciones correctas para accionarlas; accionarlas; la figura figura siguiente siguiente presenta una posición inadecuada en el manejo de ellas.
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•
El cable cable de segur segurid idad ad que que sujet sujeta a al contr contra a peso, peso, debe debe tener tener la long longititud ud necesaria para permitir el movimiento vertical suficiente de la llave, sin que el contra peso se apoye en alguna superficie.
•
Para Para evit evitar ar accid accident entes es pers person onal ales es se deben deben inspe inspecc ccio ionar nar los los cabl cables es de seguridad periódicamente.
•
Nunca debe utilizar las llaves para desconectar la tubería con rotaria.
•
Al conectar o desconectar la tubería revise que la rotaria se encuentre sin el candado.
•
Para asegurarse que la conexión tenga un buen apriete, la llave debe estar en un ángulo recto (90°) a la línea de jalón. En cualquier otro ángulo la efectividad se reduce, disminuyendo la fuerza de torque aplicada.
Llaves hidráulicas. Las llaves hidráulicas pueden ser usadas en tuberías de producción, de perforación y de revestimiento, dependiendo del modelo y tamaño que se requiera. Ver la siguiente figura Llave de rolado y apriete
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En el rango de operación o cambios cambios de diámetros diámetros de tubería, tubería, deberá sustituir únicamente las cabezas o mordazas, empleando los mismos dados. Operación. Los pasos a seguir para la operación de la llave IR 2100 son:
1.- Verificar el diámetro y tipo de la tubería que se va a manejar. 2.- coloque las cabezas o mordazas (1) al diámetro correcto. Los dados (2) deberán tener filo y estar limpios. Abra la compuerta (3) de las mordazas.
3.- Confirmar que la presión sea la requerida para aplicar el torque necesario a la tubería en cuestión
4.- Una vez realizado lo anterior, ponga la llave en la junta de tubería. 5.- Es importante que conserve la nivelación de la llave durante las operaciones, para evitar daños en la tubería y en la llave misma. Otra llave de apriete muy común de uso es la hidráulica TW 60. Ver la siguiente figura:
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Su función es apretar y aflojar hidráulicamente las juntas de la tubería de Perforación en sus diferentes diámetros, Tiene un cuerpo de agarre superior y uno Inferior, y un sistema de control de posición vertical el cual permite subir y bajar la Llave hasta una altura que le permita ser colocada para sujetar la parte de la caja y el cuerpo del piñón de la tubería. Especificaciones. Peso con colgador
1219 Kg.
Tamaño (diámetro de junta de la tubería)
de 4” a 8”
Torsión de enrosque
63,000 Ibs. x pie
Torsión de desenrosque
75,000 Ibs x pie
Presión normal de operación
2,000 Ib/pg2
Desplazamiento vertical
72 pg (1.83m)
Requisitos de potencia hidráulica
38-45 GPM a 1500 Ib/pg2
Sistema de centro de cerrado
5-15 GPM De 1500 a 2000 Ib/pg2
Recomendaciones.
1.- La llave debe de estar bien nivelada, libre de lodo, lubricada y engrasada. 2.- Las mangueras y conexiones de la llave no deben tener ninguna fuga. 3.- Use un montacargas en la instalación de la llave, para un manejo seguro y A fin de evitar daños al personal y/o al equipo.
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Especificaciones.
Rangos de tamaño:
27/8 pg. a 8 pg.
Presión normal de operación:
2000 PSI.
Requisito de potencia:
28/45 gpm a 1800 lb/5pg2
Torsión T. P. de 5"):
1200 lb pie.
Peso: 990 lb =
449 Kg.
Recomendaciones. 1.-
Las llaves deben estar bien niveladas libres de lodo, lubricadas y engrasadas.
2.- Las mangueras y conexiones de la llave no deben tener fugas. 3.-
El vástago del sistema de control vertical no debe tener dobleces y sus cables no deben tener hilos rotos.
4.-
El cable donde está colgada la llave no debe tener hilos rotos y debe tener sus grapas de seguridad.
5.-
Por seguridad es recomendable antes de utilizar la roladora, instalar un cable salvavidas en la parte trasera de la llave sujeta a un poste de aguante para limitar su giro, éste debe limitarse a 30 cm. hacia ambos lados.
* Norma de seguridad NO. AV-2. 8.4.4 Los contrapesos de las llaves deberán colocarse cerca de las piernas de la torre o mástil y de manera tal que puedan tener un desplazamiento Vertical de aproximadamente 2.45 m.
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8.7.2 Las herramientas de mano deben inspeccionarse periódicamente para Comprobar su buen estado. 8.7. 8.7.3 3 La resp respon onsa sabi bililida dad d sobr sobre e el buen buen esta estado do y orde orden n del del tabl tabler ero o de Herramientas corresponde al perforador y al encargado del equipo. 8.7.24 No se deberán emplear llaves de cadena o quijada para operar junto con las llaves neumáticas o hidráulicas. •
Se respeta el número de clasificación del original.
Reglamento de Seguridad e Higiene de Petróleos Mexicanos
V.ART. 18 Las “llaves de quebrar” deben tener una línea de seguridad para limitar su arco de giro y los extremos de esta línea (cable de acero) se deben proteger con casquillos. V.AR V.ART. T.19 19 Los contr contrap apeso esoss de estas estas llave llavess debe deben n colg colgars arse e cerca cerca de las las piernas de la torre y a la menor altura posible, para evitar que en caso de que se rompan las líneas que las sujetan puedan lesionar a los trabajadores. Llave roladora SSW 40 ESPECIFICACIONES
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En el rango de operación o cambios de diámetro de tuberías, ocurre lo mismo que en la llave descrita anteriormente, solo se cambian las cabezas o mordazas estas mismas ya traen sus dados integrados. Ver figura anterior.
4.2.- Tipos y manejos de las cuñas manuales y automáticas. Cuñas para tubería. La func funció ión n prin princi cipa pall de las las cuña cuñass para para tube tuberí ría a es sost sosten ener er la sart sarta a de perforación a nivel del piso rotaria. Ver la siguiente figura. Existen cuñas para:
a.- Tuberías de producción
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Cuñas para tuberías de producción. Las Las sigu siguie ient ntes es figur figuras as,, ilus ilustr tran an los los dos dos tipos tipos de cuñas cuñas para para tuber tubería íass de producción. Las cuñas de acción mecánica pueden ser operadas con cargas hasta de 40 tons.
Cuñas para tubería de producción.
Las cuñas de acción automática soportan cargas hasta de 40 tons.
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Espesor Orificio
Abertura
Diámetro
Esta pieza se ubica sobre la rotaria, tomando en cuenta el tamaño de ésta y tiene como función estabilizar la base de la caja c aja o araña de las cuñas.
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Precauciones. Cuando se usen cuñas de cualquier tipo u otra herramienta, invariablemente se deberá colocar el hule limpiador de tubería en el espacio espacio libre que existe entre la campana de circulación y la parte inferior del bushing de la rotaria. Este hule previene que objetos como: dados de llaves, cuñas, herramientas manuales, etc., caigan en el orificio de la rotaria y se depositen dentro del pozo, ocasionando el atrapamiento de las herramientas que se sacan, además elimina el fluido de control del exterior de la tubería dejándola limpia. Importante: El hule limpiador sirve para proteger la caída de cualquier objeto dentro del pozo.
Cuñas para tubería de perforación.
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Las cuñas de rotaria para tuberías de perforación antes mencionadas, también pueden ser usadas en tuberías lavadoras, lo único que varía es el rango de agarre de los dados, ya que el diámetro de estas tuberías es mayor. Cuñas automáticas para tubería de perforación.
ESPECIFICACIONES T.P. 27 ½” y 37 ½” A 49 ½”
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Este tipo de cuñas requieren de una guía de media luna (figura anterior) instalada en la mesa rotaria, tomando en cuenta el tamaño de esta, tiene como función estabilizar la base de la caja o araña de las cuñas. Cuñas para lastrabarrenas. Las cuñas para lastrabarrenas que se emplean en los trabajos de Perforación y Mantenimiento de pozos son las que se muestran en la figura siguiente:
Cuñas para lastrabarrenas.
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2.- Eleve la tubería y saque las cuñas evitando evitando no desgarrar desgarrar el papel examine examine la longitud longitud donde accionaron y determine toda el área de agarre; si el bushing bushing y las cuñas no están bien, notará unas marcas de agarre parciales, por lo que debe repetir la prueba con una cuñas nuevas, si aun así las marcas no son uniformes, los bushings de la rotaria están mal y deben ser reparados o cambiados.
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4.3.- Uso y manejo de las válvulas de seguridad. Tipo de válvula de compuerta y seguridad. Las válvulas de compuerta son parte principal del equipo de control superficial y se localizan en el ensamble de estrangulación; en las líneas de matar y estrangular principalmente. También se localizan en los diferentes cabezales de tuberías de revestimiento conforme avance la perforación del pozo y las etapas del mismo.
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Recomendaciones: Lubricar esporádicamente el sistema de cierre de la válvula. •
•
Se recomienda que el cierre de la válvula la realice una sola persona para evitar dañar el hule de retención de presión por exceso de apriete.
Válvulas de seguridad y preventor interior. Las normas API y reglamentos internacionales, establecen que los equipos de perforación deben estar dotados de las válvulas siguientes:
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Las llaves que operan las válvulas deben ubicarse en un sitio exclusivo y accesible para la cuadrilla en el piso de perforación.
Válvulas en el piso de perforación. Se debe disponer de una válvula de seguridad en posición abierta en cada tipo de medida de rosca que se tenga en la sarta de perforación, de una presión de trabajo similar a la del conjunto de preventores instalado.
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Preventor interior. Los reglamentos reglamentos posteriores también establecen establecen que se debe disponer disponer de un
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4.4.- Cuñas, llaves para las tuberías de revestimiento. En la introducción de las tuberías de revestimiento, es importante que el
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El elevador para T. R. de 90° y el collarín de arrastre es otro de los accesorios principales para la introducción de las tuberías de revestimiento.
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8.-Utilizar tapetes antiderrapantes en el área de la tubería. 9.- Los cables utilizados para jalar o afianzar las llaves de fuerza deben
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23.-
El bajar y el subir del chango al mástil debe realizarlo bajo la seguridad
por la línea retráctil.
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